JP2001349109A - Equipment remote control device for moving body and portable machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve burglarproofness in a moving body, in which a plurality of loaded equipments are remotely controlled respectively by communication with a portable machine. SOLUTION: A vehicle 20 transmits an out-of-compartment request signal requiring the response of the portable machine 50 in the case of the lock and unlock of each door, and transmits an in-compartment request signal requiring the response of the portable machine 50 in the case of engine starting. The portable machine 50 transmits a response signal modulated into frequency f1 for locking or unlocking a door for the vehicle 20 when the portable machine receives the out-of-compartment request signal from the vehicle 20. Then, when the portable machine receives the in-compartment request signal from the vehicle 20, the portable machine transmits a response signal modulated into frequency f2 for starting an engine. The vehicle 20 locks or unlocks the door on the basis of the response signal when the vehicle receives the response signal modulated into frequency f1 from the portable machine 50, and starts the engine on the basis of the response signal when the vehicle receives the response signal modulated into frequency f2 from the portable machine 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile device remote control device and a mobile portable device, and more particularly, to a plurality of mounted devices mounted on a mobile device through communication between the mobile device and the mobile device. The present invention relates to a remote control device for a mobile device which is remotely controlled, and a mobile device for a mobile device.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Unexamined Patent Application Publication No.
As disclosed in No. 7, an on-vehicle remote control device that remotely controls a plurality of devices mounted on a vehicle through communication between the vehicle and a portable device is known. This device receives a response signal issued by the portable device in response to a request signal issued from the vehicle side, for example, when a user carrying the portable device approaches the vehicle, unlocks the vehicle door lock. After the user gets into the vehicle, the engine is started. Therefore, according to the above-described conventional device, a plurality of devices mounted on the vehicle can be controlled without the user performing any operation on the vehicle, thereby improving the convenience for the user. be able to.

[0003]

By the way, in the above-mentioned conventional device, a request signal modulated to the same frequency is transmitted to the portable device when the door of the vehicle is unlocked and when the engine of the vehicle is started. Sent to. In this case, the antitheft property of the vehicle cannot be improved.

[0004] The present invention has been made in view of the above points, and a mobile object capable of improving the antitheft property in a mobile object in which a plurality of mounted devices are remotely controlled by communication with a portable device. It is an object to provide a remote control system for mobile devices and a mobile device for mobile objects.

[0005]

The above object is achieved by the present invention.
As described in the above, a transmission unit for transmitting a request signal requesting a response of the portable device, and a receiving unit for receiving a response signal emitted by the portable device, the code included in the response signal received by the receiving unit A mobile device remote control device for remotely controlling a plurality of devices mounted on a mobile object based on the request signal or the response signal, wherein the plurality of devices are respectively different in communication form. This is achieved by a mobile device remote control device characterized in that remote control is performed by using a remote controller.

[0006] In the first aspect of the present invention, the transmitting means transmits a request signal requesting a response of the portable device. The receiving means receives a response signal generated by the portable device. The plurality of devices mounted on the moving object are each remotely controlled based on a code included in the response signal received by the receiving unit. At this time, each of the plurality of devices is remotely controlled using a request signal or a response signal having different communication modes. That is, the communication form of the request signal or the response signal differs between the case where one device is remotely controlled and the case where the other device is remotely controlled. In this case, communication between the mobile unit and the portable device is more complicated than when the communication mode is the same. Therefore, according to the present invention, it is possible to improve the antitheft property of the moving body.

In the present invention, “communication form” means
It relates to a form when transmitting and receiving signals, such as a transmitting and receiving frequency and a modulation method, and is a concept that does not include code content in a signal, a code format, a bit rate, and the like.

[0008] In this case, as described in claim 2, in the mobile device remote control device according to claim 1, when the plurality of devices are remotely controlled, the transmitting means respectively have a communication form. The request signals different from each other may be transmitted.

Further, as described in claim 3, claim 1
In the mobile device remote control device described above, each of the plurality of devices may be remotely controlled based on a code of the response signal having a different communication mode.

[0010] The above object is as described in claim 4.
Transmitting means for transmitting a request signal requesting a response of the portable device, and receiving means for receiving a response signal emitted by the portable device, comprising, based on a code included in the response signal received by the receiving means, A mobile device remote control device for remotely controlling a plurality of devices mounted on the mobile object, wherein the transmitting means is for each predetermined area,
The present invention is achieved by a mobile device remote control device which transmits the request signals having different communication modes.

According to the fourth aspect of the present invention, the transmitting means transmits request signals having different communication modes for each predetermined area. That is, the communication format of the request signal differs between one area and another area.
In this case, the communication between the mobile unit and the portable device is complicated for each predetermined area as compared with the case where the communication mode is the same. Therefore, according to the present invention, it is possible to improve the antitheft property of the moving body.

Incidentally, the required communication distance between the mobile unit and the portable device changes according to the device to be remotely controlled. That is, depending on the device to be remotely controlled, the required communication distance may be short, or the communication distance may be long. If the required communication distance between the mobile unit and the portable device may be short, but the output level of the request signal is high, the communication area of the request signal is extended by that much, and the The confidentiality decreases.

Therefore, as set forth in claim 5, in the mobile device remote control device according to claim 2 or 4,
The request signals having different communication modes may be signals having different output levels.

[0014] The above object is as described in claim 6.
Transmitting means for transmitting a request signal requesting a response of the portable device, and receiving means for receiving a response signal emitted by the portable device, comprising, based on a code included in the response signal received by the receiving means, A mobile device remote control device for remotely controlling a plurality of devices mounted on a mobile object, wherein the transmitting unit is to emit the portable device when each of the plurality of devices is remotely controlled. Moving the request signal including a predetermined instruction code for instructing a communication mode of the response signal, and receiving the response signal having the communication mode instructed to the portable device; Achieved by a body equipment remote control.

In the invention according to claim 6, the transmission means transmits a request signal including an instruction code for instructing a communication mode of a response signal to be issued by the portable device when a plurality of devices are remotely controlled. . Also, the receiving means,
A response signal having a communication mode instructed to the portable device is received. That is, the receiving unit does not receive a response signal having a communication mode other than the communication mode instructed to the portable device. In such a configuration, each time a plurality of devices are remotely controlled, the communication mode of the response signal to be emitted from the portable device can be changed at random, and the response signal corresponding to the communication mode can be received. it can. In this case,
The communication between the mobile unit and the portable device is more complicated than a communication system having a fixed or regular communication mode. Therefore, according to the present invention, it is possible to further improve the antitheft property of the moving body.

[0016] The above object is as described in claim 7.
Transmitting means for transmitting a request signal requesting a response of the portable device, and receiving means for receiving a response signal emitted by the portable device, comprising, based on a code included in the response signal received by the receiving means, A mobile device remote control device for remotely controlling a plurality of devices mounted on a mobile object, wherein the receiving unit receives the response signals having different transmission frequencies for each of the devices to be remotely controlled. This is achieved by a mobile device remote control device.

In the invention according to claim 7, the receiving means receives response signals having different transmission frequencies for each device to be remotely controlled. In other words, the transmission frequency of the response signal received by the receiving unit differs between the case where one device is remotely controlled and the case where the other device is remotely controlled. Therefore, according to the present invention, the anti-theft property of the moving body is improved.

[0018] The above object is as described in claim 8.
When receiving a request signal transmitted from a mobile body, a mobile portable device for transmitting a response signal to remotely control the device mounted on the mobile body, when remotely controlling the device, The present invention is achieved by a mobile portable device that transmits the response signals having different communication modes for each of the devices.

[0020] In the invention according to claim 8, when the mobile portable device receives a request signal transmitted from the mobile object, the mobile device transmits a response signal to remotely control a device mounted on the mobile object. . At this time, the mobile portable device transmits a response signal having a different communication form for each device to be remotely controlled. In this case, the communication between the mobile unit and the portable device is more complicated than when the communication form of the response signal is the same. Therefore, according to the present invention, it is possible to improve the antitheft property of the moving body.

[0020] The above object is as described in claim 9,
When receiving a request signal transmitted from a mobile body, a mobile portable device for transmitting a response signal to remotely control the device mounted on the mobile body, when remotely controlling the device, The present invention is achieved by a mobile portable device that transmits the response signal having a communication mode according to a predetermined instruction code included in the request signal.

According to the ninth aspect of the present invention, when remotely controlling a device mounted on the mobile unit, the communication unit for the mobile unit has a response having a communication form according to an instruction code included in a request signal from the mobile unit. Send a signal. In such a configuration, each time the device is remotely controlled, the communication form of the response signal to be emitted is randomly changed. In this case,
The communication between the mobile unit and the portable device is more complicated than a communication system having a fixed or regular communication mode. Therefore, according to the present invention, it is possible to further improve the antitheft property of the moving body.

Further, the above object is to transmit a response signal when a request signal transmitted from a mobile body is received to remotely control a device mounted on the mobile body. A mobile portable device that transmits a plurality of response signals having different communication modes when remotely controlling the device.

In the tenth aspect of the present invention, when the portable device for a mobile unit remotely controls a device mounted on the mobile unit,
A plurality of response signals having different communication modes are transmitted. In this case, the communication between the mobile unit and the portable device becomes more complicated than when the response signal to be transmitted is single. Therefore, according to the present invention, it is possible to improve the antitheft property of the moving body.

Incidentally, as described above, the required communication distance between the mobile unit and the portable device changes according to the device to be remotely controlled. If the required communication distance between the mobile unit and the portable device may be short, but the output level of the request signal is high, the communication area of the request signal is extended by that much, and the The confidentiality decreases.

Therefore, as described in claim 11, in the mobile portable device according to claim 8 or 10, the response signals having different communication modes may be signals having different output levels.

[0026]

FIG. 1 is a system configuration diagram of a mobile device remote control device according to an embodiment of the present invention. As shown in FIG. 1, the system of the present embodiment includes a vehicle 20. The vehicle 20 includes a vehicle electronic control unit (hereinafter, referred to as a vehicle electronic control unit).
EC for vehicles)
It is controlled by U22. The vehicle ECU 22 has a built-in memory in which an ID code and the like of the vehicle 20 are stored.

The vehicle ECU 22 includes transmitters 24, 2
6 and the receiver 28 are connected. Transmitter 24
Is a circuit having an antenna 30 disposed outside the vehicle compartment and transmitting a signal modulated to a predetermined frequency f ₀ (for example, 125 kHz) from the antenna 30 to the outside of the vehicle compartment. The transmitter 26 has an antenna 32 installed in the vehicle interior, and is a circuit for transmitting a signal modulated to a predetermined frequency f ₀ from the antenna 32 to the vehicle interior similarly to the transmitter 24. The receiver 28 has two antennas 34 and 36, and is a circuit that amplifies and demodulates signals of the predetermined frequencies f ₁ and f ₂ received by the antennas 34 and 36, respectively. Signals transmitted from the transmitters 24 and 26 are each given such an intensity that the communicable area becomes several meters. Under predetermined conditions, the vehicle ECU 22 transmits a signal including an ID code of the vehicle 20 and a discrimination code for distinguishing the transmitters 24 and 26 from the transmitters 24 and 26 at regular intervals (hereinafter, this signal is referred to as a request signal). ) Are supplied to the transmitters 24 and 26 so that the transmitter signals are transmitted.

In the following, the transmitter 24 will be referred to as “outside transmitter 24”, the transmitter 26 will be referred to as “inside transmitter 26”, the receiver 28 will be referred to as “response code receiver 28”, and the outside transmitter will be used. The request signal transmitted from the vehicle 24 is referred to as an “out-of-vehicle request signal”, and the request signal transmitted from the in-vehicle transmitter 26 is referred to as a “in-vehicle request signal”.

The vehicle ECU 22 is also connected to a door open / close switch 38 for outputting a signal according to the open / closed state of the door of the vehicle 20. The vehicle ECU 22 determines whether the door of the vehicle 20 is open or closed based on the output signal of the door open / close switch 38. The vehicle ECU 22 further includes a door lock actuator 40.
And the engine control unit 42 are connected. The door lock actuator 40 is an actuator that locks or unlocks each door of the vehicle 20.
The doors of the vehicle 20 are locked or unlocked based on the command signal supplied from the control unit 2. The engine control unit 4
Reference numeral 2 denotes a circuit for controlling the start and stop of the engine mounted on the vehicle 20, and starts and stops the engine based on a command signal supplied from the vehicle ECU 22.

Further, the system of the present embodiment includes a portable device 50 that can be carried by an occupant of the vehicle 20. Portable device 50
Is a device for remotely locking or unlocking each door of the vehicle 20 in a non-contact manner, and a device for remotely controlling the start / stop of an engine mounted on the vehicle 20 in a non-contact manner. is there. The portable device 50 includes a portable electronic control unit (hereinafter, referred to as a portable ECU) 52 and is controlled by the portable ECU 52.

A receiver 54 and transmitters 56 and 58 are connected to the portable ECU 52. Receiver 54
Is a circuit having an antenna 60 and amplifying and demodulating a signal of a predetermined frequency f ₀ received by the antenna 60. Further, the transmitters 56 and 58 are respectively connected to the antennas 6.
₂ and 64, and transmits signals modulated to predetermined frequencies f ₁ and f ₂ from the antennas 62 and 64.
The signals transmitted from the transmitters 56 and 58 include:
The same strength as that of the signals transmitted by the transmitters 24 and 26 on the vehicle 20 side is provided, and the strength is such that the communicable area is several meters. In the following, the receiver 54 is referred to as “request receiver 5
4 ”, the transmitter 56 is referred to as a“ first transmitter 56 ”, and the transmitter 5
8 is referred to as a “second transmitter 58”.

The portable ECU 52 includes a decryption unit 66 for decoding a request signal, and antennas 62 and 6.
4 has a built-in code generation unit 68 for encrypting a signal to be transmitted in a predetermined format. Also,
The portable ECU 52 has a built-in memory in which an ID code and the like of the vehicle 20 corresponding to the portable device 50 are stored. When a request signal from the vehicle 20 is received by the antenna 60, the portable ECU 52 checks the request signal, and then transmits a signal including an ID code of the vehicle 20 (hereinafter, this signal is referred to as a response signal). Like
A command signal is supplied to the transmitters 56 and 58.

In the above system, if the door is locked while the engine of the vehicle 20 is stopped, the vehicle EC
U22 supplies a command signal to vehicle exterior transmitter 24 such that the encrypted vehicle exterior request signal is transmitted from antenna 30 with a predetermined transmission frequency at regular time intervals. When the user carrying the portable device 50 corresponding to the vehicle 20 approaches the vehicle 20 under the condition that the request signal outside the vehicle room is transmitted from the antenna 30 of the vehicle 20, that is, the transmitter outside the vehicle room of the vehicle 20 When the portable device 50 enters the communicable area 24, the portable device 50 receives a request signal outside the vehicle compartment emitted from the antenna 30 of the vehicle 20.

In this case, the portable ECU 52 of the portable device 50
Is the request signal transmitted through the exterior transmitter 24 of the vehicle 20 or transmitted through the interior transmitter 26 based on the discrimination code of the received request signal? That is, it is determined whether the door is required to be locked / unlocked or the engine is required to be started. After demodulating the request signal and decrypting the code, the ID included in the request signal is determined. The code is compared with the ID code stored in its own memory. If the door signal is requested to be locked / unlocked by the request signal and the ID codes match, the code generation unit 68
In such response signal encrypted by a predetermined format are transmitted via the first transmitter 56, i.e., the so response signal modulated to a predetermined frequency f ₁ is transmitted toward the vehicle 20 A command signal is supplied to one transmitter 56.

The vehicle ECU22, after the vehicle exterior request signal from the antenna 30 of the outside transmitter 24 is transmitted, the response signal modulated to a predetermined frequency f ₁ is received by the antenna 34 of the response code receiver 28 In this case, the response signal is demodulated and its encryption is decrypted, and the ID code included in the response signal is compared with the ID code stored in its own memory. If they match, a legitimate user is determined to have approached the vehicle 20 and a command signal is supplied to the door lock actuator 40 to unlock each door of the vehicle 20.

Also, when the door of the vehicle 20 is opened and closed after the engine is stopped, the vehicle ECU 22 transmits the modulated outside request signal to the outside transmitter 24 so that the outside request is transmitted from the antenna 30. Supply command signal. In such a situation, when the portable device 50 receives the request signal outside the vehicle, the portable ECU 52 demodulates and decrypts the request signal, and then compares the ID code with the ID code in the memory. If you do
Modulated response signal to a predetermined frequency f ₁ supplies a command signal to the first transmitter 56 to be transmitted toward the vehicle 20. Then, the vehicle ECU 22 transmits the response signal modulated to the predetermined frequency f ₁ to the antenna 3 of the response code receiver 28.
4, the response signal is demodulated and decrypted, and then the ID code in the response signal is compared with the ID code stored in the memory.
It is assumed that the authorized user moves away from the vehicle 20 and the vehicle 20
Door lock actuator 40 to lock each door
To supply a command signal.

As described above, in this embodiment, the vehicle E
The CU 22 outputs the vehicle exterior request signal to the vehicle exterior transmitter 24.
Based on the response signal of a predetermined frequency f ₁ generated by the portable unit 50 after being transmitted through the controls the driving of the door lock actuator 40 for locking or unlocking the doors of the vehicle 20. Therefore, according to the system of the present embodiment, by using the portable device 50 capable of transmitting and receiving the predetermined signal to and from the vehicle 20, the user of the vehicle 20 can operate the vehicle 20 without performing any operation. Each door can be locked or unlocked remotely without contact.

In the above system, the vehicle E
The CU 22 transmits the vehicle interior so that the encrypted vehicle interior request signal is transmitted from the antenna 32 with a predetermined transmission frequency for a certain period after each door of the vehicle 20 is unlocked and the door is opened and closed. Command signal to the machine 26. In a situation where a request signal is transmitted from the antenna 32 of the vehicle 20 to the vehicle interior, the occupant carrying the portable device 50 enters the vehicle interior, and the portable device 50 enters the communicable area of the vehicle interior transmitter 26. Then, the portable device 50
The request signal transmitted from the antenna 32 of the vehicle 20 is received.

In this case, the portable ECU 52 of the portable device 50
Determines whether door lock / unlock or engine start is required based on the request signal, and stores the ID code included in the request signal and its own memory. ID
Check with code. As a result, if the source of the request signal is the transmitter 26 in the vehicle and the ID codes match, the request signal is encrypted using the same format as the format of the response signal transmitted via the first transmitter 56. as response signal is transmitted via the second transmitter 58 is, i.e., a command signal to the second transmitter 58 as the response signal modulated to a predetermined frequency f ₂ is transmitted towards the vehicle Supply.

After the vehicle interior request signal is transmitted from the antenna 32 of the vehicle interior transmitter 26, the vehicle ECU 22 receives the response signal modulated to the predetermined frequency f ₂ by the antenna 36 of the response code receiver 28. In this case, the response signal is demodulated and its encryption is decrypted, and the ID code included in the response signal is compared with the ID code stored in its own memory. If they match, it is determined that the legitimate user has entered the vehicle 20 and a command signal is supplied to the engine control unit 42 to start the engine of the vehicle 20.

As described above, in this embodiment, the vehicle E
The CU 22 outputs the request signal from the vehicle interior
Based on the response signal of a predetermined frequency f ₂ generated by the mobile unit 50 after being transmitted through the controls the engine control unit 42 to start the engine of the vehicle 20. Therefore, according to the system of the present embodiment, by using the portable device 50 capable of transmitting and receiving the predetermined signal to and from the vehicle 20, the user of the vehicle 20 can operate the vehicle 20 without performing any operation. The engine can be started remotely without contact.

As described above, the system of this embodiment uses the portable device 50 that transmits two response signals having different transmission frequencies in response to the request signal on the vehicle 20 side.
This system remotely locks and unlocks each door of the vehicle 20 in a non-contact manner and remotely starts the engine of the vehicle 20 in a non-contact manner. Specifically, the portable device 50
Transmits a response signal of a predetermined frequency f ₁ from the antenna 62 to lock and unlock the door of the vehicle 20.
When starting the engine of the vehicle 20, a response signal of a predetermined frequency f ₂ (≠ f ₁ ) different from the predetermined frequency f ₁ is transmitted from the antenna 64 to the vehicle 20. Further, when the vehicle 20 receives the response signal of the predetermined frequency f ₁ emitted from the portable device 50 after transmitting the request signal outside the vehicle compartment from the antenna 30, the vehicle 20 locks or unlocks each door, and transmits the vehicle interior request signal from the antenna 32. when receiving the response signal of a predetermined frequency f ₂ after transmitting a signal to start the engine.

In such a configuration, after the vehicle 20 transmits a request signal outside the vehicle compartment from the antenna 30 of the transmitter 24 outside the vehicle, the vehicle 20 receives a response signal having a frequency other than the predetermined frequency f ₁ (for example, the predetermined frequency f ₂ ). Also, each door is not locked or unlocked, and the vehicle 20
There is also received a response signal having a frequency (for example, a predetermined frequency f ₁₎ other than the predetermined frequency f ₂ after sending the passenger compartment request signal from the antenna 32 of the inside transmitter 26,
The engine will not be started.

As described above, in this embodiment, the vehicle 20
Locking and unlocking each door and starting the engine
The transmission frequencies are remotely controlled using response signals different from each other. That is, when each door of the vehicle 20 is locked and unlocked remotely using the portable device 50,
In the case where the engine is remotely started using the portable device 50, the transmission frequencies of the response signals generated by the portable device 50 are different from each other. In this case, communication between the vehicle 20 and the portable device 50 is more complicated than when the transmission frequencies of the response signals are the same. Therefore, according to the system of the present embodiment, in the transmission and reception of signals between the vehicle 20 and the portable device 50, response signals having different transmission frequencies are used when the door is locked / unlocked and when the engine is started. The anti-theft property of the vehicle 20 is improved.

Since the portable device 50 of the present embodiment is carried by a user, it is desirable that the portable device be small.
It is also desirable that the power supply be small. However,
When the request receiver 54 of the portable device 50 has a complicated configuration, a large area is required and a large amount of power is consumed.

On the other hand, in this embodiment, the transmission frequency f ₀ of the outside request signal transmitted from the antenna 30 of the outside transmitter 24 and the vehicle frequency transmitted from the antenna 32 of the inside transmitter 26 are transmitted. Since the transmission frequency f ₀ of the outdoor request signal is the same, it is sufficient that the request receiver 54 of the portable device 50 can receive only the request signal of the transmission frequency f ₀ . That is, to the request receiver 54 of the portable device 50 to the multi-path is not required, it is possible to simple structure of one system that can receive only the request signal of the transmission frequency f _0. In this case, the area of the portable device 50 is reduced and the standby power is suppressed to be smaller than when the request receiver 54 has multiple systems.
For this reason, according to the system of the present embodiment, it is possible to avoid an increase in the size of the portable device 50 and to prevent a reduction in power consumption.

In this embodiment, as described above,
The transmission frequency of the response signal generated by the portable device 50 differs between when the door of the vehicle 20 is locked / unlocked and when the engine is started. Therefore, the response code receiver 28 of the vehicle 20 needs to have two systems. However, since the response code receiver 28 is mounted on the vehicle 20 and is driven by the battery of the vehicle 20, there is no problem even if a large area and a large power consumption are involved. Therefore, according to the system of the present embodiment, the antitheft property of the vehicle 20 can be improved without increasing the burden on the portable device 50 as much as possible.

In this embodiment, the transmission frequency of the response signal generated by the portable device 50 differs between when the door of the vehicle 20 is locked and unlocked and when the engine is started, while the format of the ID code is different. The format is the same. In this case, the vehicle ECU 22 of the vehicle 20 demodulates the received response signal and then outputs the ID included in the signal.
Codes can be decoded in the same format. For this reason, in this embodiment, the burden when the vehicle ECU 22 decodes the response signal is reduced.

In the above-described first embodiment, the transmitter 24 outside the vehicle compartment and the transmitter 26 inside the vehicle compartment correspond to the "transmission means" described in the claims, and the response code receiver 28 corresponds to the claims. The vehicle 20 corresponds to the “moving object” described in the claims, the door lock actuator 40 and the engine control unit 42 correspond to the “device” described in the claims, The transmission frequency of the response signal to be emitted is the "communication form" described in the claims,
Each is equivalent.

Next, a second embodiment of the present invention will be described with reference to FIGS. 2 to 5 together with FIG.

FIG. 2 is a system configuration diagram of the mobile device remote control device of this embodiment. In FIG. 2, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 2, the system of this embodiment includes a portable device 100 that can be carried by an occupant. The portable device 100 is a device for remotely locking or unlocking each door of the vehicle in a non-contact manner, similarly to the portable device 50, and controls the start / stop of an engine mounted on the vehicle. Equipment.

The portable device 100 includes the portable ECU 5 described above.
2, the portable ECU 1 connected to the request receiver 54 and including the decryption unit 66 and the code generation unit 68.
02. The portable ECU 102 includes the portable device 1
A memory in which an ID code and the like of the vehicle corresponding to 00 are stored. A transmitter 104 is connected to the portable ECU 102. The transmitter 104 is a circuit having an antenna 106 and transmitting the signal containing the ID code of the vehicle from the antenna 106 after performing amplitude modulation or frequency shift modulation on the signal. Hereinafter, the transmitter 104 is referred to as a “response code transmitter 104”.

FIG. 3 shows a response code transmitter 10 according to this embodiment.
4 shows an internal configuration diagram of FIG. As shown in FIG. 3, the response code transmitter 104 includes a transistor 108. The code generation unit 68 of the portable ECU 102 includes the power supply voltage V
_A port output terminal 110 that can be connected to _cc1 and a port output terminal 112 that is connected to a modulation output terminal are provided. The port output terminal 110 is connected to the collector terminal 108c of the transistor 108 and the antenna 106 via the resistor 114. The collector terminal 108 c of the transistor 108 is connected to the base terminal 1 via the resistor 116.
08b. The emitter terminal 108e of the transistor 108 is grounded. Further, the port output terminal 112 is connected to the cathode side of the varicap diode 118 whose anode side is grounded. The cathode side of the varicap diode 118 has an oscillation frequency f ₁₁
Is connected to the base terminal 108b of the transistor 108 through the resonator 120.

FIG. 4A shows an amplitude-modulated signal (hereinafter, ASK) from antenna 106 of response code transmitter 104.
An example of the change over time of the voltage applied to the port output terminals 110 and 112 of the code generation unit 68 of the portable ECU 102 when the signal is transmitted is shown. FIG.
(B) shows the case where a frequency-shift-modulated signal (hereinafter, referred to as an FSK signal) is transmitted from the antenna 106 of the response code transmitter 104, and the port output terminals 110 and 112 of the code generation unit 68 of the portable ECU 102. 6 shows an example of a time change of a voltage applied to the thyristor.

As shown in FIG. 4A, the port output terminal 1
12 is maintained at a low signal, and the output of the port output terminal 110 is turned on / off according to the ID code of the vehicle.
In FIG. 7, an amplitude-modulated ASK signal having a constant oscillation frequency appears. In this case, an ASK signal is generated in response code transmitter 104, so that response code transmitter 1
A according to the vehicle ID code from the antenna 106
An SK signal is transmitted as a response signal.

Also, as shown in FIG.
The output of terminal 110 is always the power supply voltage V _cc1Maintained in the
The output of the port output terminal 112 is used as the vehicle ID code.
Therefore, when turned on and off, the varicap diode 1
The oscillation frequency of the resonator 120 changes due to the change in the capacitance of 18.
And the collector output terminal 108c of the transistor 108
A frequency shift keyed FSK signal having a constant amplitude.
Issue appears. In this case, the response code transmitter 104
The FSK signal is generated and the response code transmitter 1
04 according to the vehicle ID code from the antenna 106 of F
An SK signal is transmitted as a response signal.

As shown in FIG. 2, the system of this embodiment is
The vehicle 130 is provided. The vehicle 130 is
E for vehicles with a built-in memory in which an ID code and the like are stored.
The CU 132 is mounted, and is controlled by the vehicle ECU 132. The vehicle ECU 132 is connected to the vehicle exterior transmitter 24, the vehicle interior transmitter 26, the door open / close switch 38, the door lock actuator 40, and the engine control unit 42, similarly to the vehicle ECU 22, and the receiver 134 is connected to the vehicle ECU 132. It is connected. The receiver 134 has an antenna 136, and is a circuit that amplifies and demodulates a signal received by the antenna 136. Hereinafter, the receiver 134 is referred to as a “response code receiver 134”.

FIG. 5 shows the response code receiver 13 of this embodiment.
4 shows an internal configuration diagram of FIG. As shown in FIG. 5, the response code receiver 134
Pass filter 140, preamplifier 142, mixer 14
4. Local oscillator 146, band pass filter 1
48, and a limiter amplifier 150. The limiter amplifier 150 is connected to a binarization circuit 154 via a quadrature detection circuit 152,
The binarizing circuit 154 is connected via the I output. 2
The output terminal of the value conversion circuit 154 is connected to the vehicle ECU 132. Limiter amplifier 150 and binarization circuit 15
4, the state connected to the output of the quadrature detection circuit 152 and the RSSI (Receiv
A switch 156 for selectively switching between a state of connection to an ed Signal Strength Indicator (output) output is provided. The switch ECU 156 is connected to the switch 156. The switch 156 connects the limiter amplifier 150 and the binarization circuit 154 according to a command signal from the vehicle ECU 132.

The limiter amplifier 150 and the binarizing circuit 154
Are connected via the quadrature detection circuit 152, a signal having a voltage according to a change in the transmission frequency of the signal received by the antenna 136 is input to the binarization circuit 154. Also, the RSS of the limiter amplifier 150
When the I output and the binarization circuit 154 are connected,
A signal having a voltage according to a change in the amplitude of the signal received by the antenna 136 is input to the binarization circuit 154.
The binarization circuit 154 outputs a high signal when the input voltage is equal to or higher than the threshold, and outputs a low signal when the input voltage is lower than the threshold. Vehicle ECU 1
Reference numeral 32 denotes a signal generated by the portable device 100 by appropriately driving the switch 156 regardless of whether the signal received by the antenna 136 is modulated by ASK modulation or FSK modulation. Can be recognized as

In the above system, if the door is locked while the engine of the vehicle 130 is stopped, the vehicle E
The CU 132 supplies a command signal to the vehicle exterior transmitter 24 so that the modulated and encrypted vehicle exterior request signal is transmitted from the antenna 30 with a predetermined transmission frequency at regular intervals. Under such circumstances, the outside transmitter 2
When the portable device 100 enters the communicable area of No. 4, the portable device 100 receives the outside request signal transmitted from the antenna 30 of the vehicle 130.

In this case, the portable ECU 1 of the portable device 100
02, based on the received request signal, determines whether the door lock / unlock is required or the engine start is required, and stores the ID code included in the request signal and its own memory. Is compared with the ID code stored in. As a result, the transmission source of the request signal is the outside transmitter 24 and both I
If the D codes match, the port output terminals 110, 1
12 is applied with a voltage as shown in FIG. In this case, an ASK signal according to the ID code of vehicle 130 is transmitted from antenna 106 of response code transmitter 104 as a response signal.

The vehicle ECU 132 is connected to the outside transmitter 24.
When the outside request signal is transmitted from the antenna 30 of the above, the switch 156 is driven to connect the RSSI output of the limiter amplifier 150 to the binarization circuit 154. In this case, the response code receiver 134
The response signal modulated by the SK modulation method can be amplified and demodulated. The vehicle ECU 132 is connected to the outside transmitter 24.
When the response signal modulated by the ASK modulation method is received by the antenna 136 of the response code receiver 134 after the request signal outside the vehicle is transmitted from the antenna 30 of the receiver, the ID code included in the response signal and its own memory Is compared with the ID code stored in the vehicle, and as a result, if both match, it is determined that the authorized user has approached the vehicle 130, and a command signal is sent to the door lock actuator 40 to unlock each door of the vehicle 130. Supply.

Also, when the door of the vehicle 130 is opened and closed after the engine is stopped, the vehicle ECU 132 sends the modulated external request signal to the external transmitter 24 so that the antenna 30 transmits the external request signal. Supply command signal. In such a situation, when the portable device 100 receives the request signal outside the vehicle, the portable ECU 102 checks the ID code included in the request signal against a predetermined ID code. Terminal 1
A voltage is applied to 10, 112 as shown in FIG. Then, the vehicle ECU 132 transmits the ASK signal from the portable device 100 to the antenna 1 of the response code receiver 134.
36, the ID code included in the response signal is collated, and if the ID code is a legitimate one, it is determined that the legitimate user is away from the vehicle 130 and each door of the vehicle 130 is locked. For this purpose, a command signal is supplied to the door lock actuator 40.

As described above, in this embodiment, the vehicle E
The CU 132 outputs the request signal outside the vehicle to the transmitter 2 outside the vehicle.
ASK emitted by the portable device 100 after being transmitted through
Based on the modulated response signal, the driving of a door lock actuator 40 that locks or unlocks each door of the vehicle 130 is controlled. Therefore, according to the system of the present embodiment, the user of the vehicle 130 does not perform any operation by using the portable device 100 capable of transmitting the ASK signal in response to the outside request signal on the vehicle 130 side. Instead, each door of the vehicle 130 can be locked or unlocked remotely without contact.

In the above system, the vehicle E
The CU 132 supplies a command signal to the vehicle interior transmitter 26 so that the vehicle interior request signal is transmitted from the antenna 32 for a certain period after each door of the vehicle 130 is locked and the door is opened and closed. Under such circumstances, when the occupant carrying the portable device 100 enters the inside of the vehicle compartment and enters the communicable area of the in-vehicle transmitter 26, the portable device 100 emits the antenna 32 of the vehicle 130. The received vehicle interior request signal is received.

In this case, the portable ECU 1 of the portable device 100
02, based on the received request signal, determines whether the door lock / unlock is required or the engine start is required, and stores the ID code included in the request signal and its own memory. Is compared with the ID code stored in. As a result, the source of the request signal is the vehicle interior transmitter 26, and both I
If the D codes match, the port output terminals 110, 1
12 is applied with a voltage as shown in FIG. In this case, F from antenna 106 of response code transmitter 104
An SK signal is transmitted as a response signal.

The vehicle ECU 132 is connected to the vehicle interior transmitter 26.
When the vehicle interior request signal is transmitted from the antenna 32, the switch 156 is driven to connect the limiter amplifier 150 and the binarization circuit 154 via the quadrature detection circuit 152. In this case, the response code receiver 134 can amplify and demodulate the response signal modulated by the FSK modulation method. ECU 132 for vehicle
The response signal modulated by the FSK modulation method is transmitted to the antenna 136 of the response code receiver 134 after the vehicle interior request signal is transmitted from the antenna 32 of the vehicle interior transmitter 26.
, The ID code included in the response signal is compared with the ID code stored in its own memory. If they match, it is determined that the legitimate user has entered the vehicle 130 and a command signal is supplied to the engine control unit 42 to start the engine of the vehicle 130.

As described above, in this embodiment, the vehicle E
The CU 132 outputs the request signal from the cabin transmitter 2
FSK emitted by portable device 100 after being transmitted through
The engine control unit 42 that starts the engine of the vehicle 130 is controlled based on the modulated response signal. Therefore,
According to the system of the present embodiment, by using the portable device 100 capable of emitting the FSK signal in response to the request signal inside the vehicle 130, the user of the vehicle 130 does not perform any operation. It is possible to start the 130 engine remotely without contact.

As described above, the system according to the present embodiment responds to the request signal from the vehicle 130 by using the ASK signal or the FSK signal.
This system uses a portable device 100 that issues an SK signal to remotely lock and unlock each door of the vehicle 130 in a non-contact manner, and to remotely start an engine of the vehicle 130 in a non-contact manner. Specifically, the portable device 100 transmits the transmitter 2 included in the request signal issued from the vehicle 130 side.
Based on the discrimination code for distinguishing between 4 and 26, it is determined whether door lock / unlock is required or engine start is required. And
When locking and unlocking the door of the vehicle 130, the ASK-modulated response signal from the antenna 106 is transmitted to the vehicle 13.
0, and when starting the engine of the vehicle 130, the FSK-modulated response signal is transmitted from the antenna 106 to the vehicle 130. The vehicle 130
Can transmit only the ASK signal when transmitting the outside request signal from the antenna 30,
Thereafter, when an ASK signal from the portable device 100 is received, each door is locked or unlocked. Further, when transmitting the vehicle interior request signal from the antenna 32, only the FSK signal can be received, and thereafter, when the FSK signal emitted from the portable device 100 is received, the engine is started.

In such a configuration, after the vehicle 130 transmits the outside request signal from the antenna 30 of the outside transmitter 24, the vehicle 130 cannot receive a response signal having a signal other than the ASK signal (for example, the FSK signal). Therefore, if the vehicle 130 does not receive the ASK signal after transmitting the outside request signal from the antenna 30, each door is not locked or unlocked. In addition, after the vehicle 130 transmits a request signal inside the vehicle from the antenna 32 of the transmitter 26 in the vehicle, the vehicle 130 cannot receive a response signal having a signal other than the FSK signal (for example, an ASK signal). Therefore, unless vehicle 130 receives the FSK signal after transmitting the vehicle interior request signal from antenna 32, the engine will not be started.

As described above, in this embodiment, the vehicle 13
Locking / unlocking of each door and starting of the engine are remotely controlled using response signals having different modulation methods. That is, each door of the vehicle 130 is
When the locking and unlocking of the vehicle 130 are remotely locked and unlocked, and when the engine of the vehicle 130 is remotely started using the mobile device 100, the modulation schemes of the response signals generated by the mobile device 100 are different from each other. different. In this case, communication between the vehicle 130 and the portable device 100 is more complicated than when the response signal modulation schemes are the same.
Therefore, according to the system of the present embodiment, in the transmission and reception of signals between the vehicle 130 and the portable device 100, response signals having different modulation schemes are used when the door is locked / unlocked and when the engine is started. The anti-theft property of the vehicle 130 is improved. In the second embodiment, the response code receiver 134 corresponds to the “receiving means” described in the claims, and the vehicle 130 corresponds to the “mobile body” described in the claims. The modulation method of the generated response signal corresponds to the “communication form” described in the claims.

By the way, in the second embodiment,
The portable device 100 transmits an ASK signal when each door of the vehicle 130 is locked or unlocked,
K signal is transmitted, but ASK signal and F
The SK signal may be transmitted in reverse. Further, for example, the portable device 100 first generates an ASK signal and then transmits an FSK signal when the door is locked and unlocked, and generates an FSK signal and then generates an ASK signal when the engine is started. It may be that.
In such a configuration, if the ID codes of both response signals are determined to be legitimate in the vehicle ECU 132, each door is locked or unlocked, or the engine is started. In this case,
Since communication between the vehicle 130 and the portable device 100 becomes complicated,
The anti-theft property of the vehicle 130 is further improved. Further, only the ASK signal or the FSK signal may be transmitted to the portable device 100 when the door is locked or unlocked, and both the ASK signal and the FSK signal may be transmitted when the engine is started.

In the second embodiment, the vehicle 130 requests the portable device 100 to transmit the ASK signal when each door of the vehicle 130 is locked or unlocked, and transmits the FSK signal to the portable device 100 when the engine is started. Is requested, but every time the door is locked / unlocked or the engine is started, the portable device 100 is randomly transmitted without regularity.
Of the response signal to be transmitted by the portable device 100
May be requested to transmit a response signal modulated by the selected modulation scheme. In this case, as compared with the case where the modulation method of the response signal has regularity, the vehicle 1
The communication between the portable device 100 and the portable device 100 is further complicated. Therefore, according to such a configuration, the anti-theft property of the vehicle 130 can be further improved.

In the second embodiment, the modulation method of the response signal is switched between ASK modulation and FSK modulation when the door of the vehicle 130 is locked / unlocked and when the engine is started. May be adopted.

Next, a third embodiment of the present invention will be described with reference to FIGS.

FIG. 6 shows an internal configuration diagram of the portable device 200 provided in the system of this embodiment. Portable device 200 of the present embodiment
Is the response code transmitter 1 in the configuration shown in FIG.
This is realized by using the response code transmitter 202 instead of the response code transmitter 04. 6, the same components as those shown in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 6, the response code transmitter 202
Has an antenna 204 together with an antenna 106, performs frequency shift modulation of a signal including an ID code of a vehicle at two different frequencies, and
4 is a circuit for transmission. In the response code transmitter 202, the collector terminal 108c of the transistor 108
Is connected to the base terminal 208b of the transistor 208 via the capacitor 206. Transistor 2
08 is connected to a collector terminal 208c via a resistor 210. Transistor 20
Eight collector terminals 208 _c are connected to a power supply terminal 214 to which a power supply voltage V _cc2 is supplied via a resistor 212 and to the antenna 204. The emitter terminal 208e of the transistor 208 is grounded. Further, the base terminal 208b of the transistor 208
It is grounded through the resonator 216 of the oscillation frequency f _12.

In the above configuration, the port output terminal 11
0 and the power supply voltage V _cc1And V_cc2Is supplied
Under the situation where the output of the port output terminal 112 is
When turned on / off according to both ID codes,
The change in the capacitance of the
The oscillation frequency changes. In this case, send the response code
Since the FSK signal is generated in the
Wave number f₁₁From the antenna 106 tuned to the vehicle ID
FSK signal according to the code is transmitted as a response signal
You.

The base terminal 2 of the transistor 208
08b is the collector output terminal 1 of the transistor 108.
08c via the capacitor 206
The input FSK signal is input and the resonator 216
Transmission frequency f₁₂Is input. This place
Transistor 208 mixes those signals.
As a result, the collector output terminal of the transistor 208
208c, due to the nonlinear characteristic of the transistor 208,
And the frequency f₁₁, F₁₂Frequency f₁₁And frequency
Number f₁₂And the sum component (f₁₁+ F₁₂), The difference component (f₁₁−
f₁₂) And their squared and cubic components appear
You. In this embodiment, the frequency (f₁₁+ F ₁₂) Almost
From the tuned antenna 204, according to the vehicle ID code
The transmitted FSK signal is transmitted as a response signal.

FIG. 7 is a block diagram of a main part of a vehicle 220 provided in the system of this embodiment. The vehicle 220 of the present embodiment includes:
In the configuration shown in FIG. 2, instead of the vehicle ECU 132 and the response code receiver 134, the vehicle ECU 22
2. It is realized by using the first response code receiver 224 and the second response code receiver 226. The first response code receiver 224 has an antenna 228,
A circuit for amplifying and demodulating a signal having a predetermined frequency f ₁₁ received by the antenna 228. The second response code receiver 226 has an antenna 230,
This circuit amplifies and demodulates a signal of a predetermined frequency (f ₁₁ + f ₁₂ ) received at 0.

First and second response code receivers 224, 2
26 and the vehicle ECU 222, a state in which the first response code receiver 224 and the vehicle ECU 222 are conducted, and a state in which the second response code receiver 226 and the vehicle ECU 222 are connected.
And a switch 232 for switching between a state in which conduction is established and a state in which conduction is established. The switch 232 is connected to the vehicle ECU 22.
2 are connected. The switch 232 is a vehicle ECU
In accordance with the command signal from 222, ECU 222 for vehicle is selectively made conductive to first or second response code receiver 224, 226. The vehicle ECU 222 appropriately drives the switch 232 even when the response signal emitted from the portable device 200 is modulated into two different frequencies,
The response signal can be recognized as a signal emitted from the portable device 200.

In the above system, if the door is locked while the engine of the vehicle 220 is stopped, the vehicle E
The CU 222 supplies a command signal to the vehicle exterior transmitter 24 to transmit a vehicle exterior request signal to the portable device 200 at regular intervals, similarly to the vehicle ECU 132. In addition, even when the door of the vehicle 220 is opened and closed after the engine is stopped, a command signal is transmitted to the exterior transmitter 24 to transmit an exterior request signal to the portable device 200. Further, the vehicle interior request signal is transmitted to the portable device 2 for a certain period after the doors of the vehicle 220 are unlocked and the doors are opened and closed.
A command signal is supplied to the in-vehicle transmitter 26 to be transmitted toward 00.

In the above situation, the portable device 200 is
When receiving a request signal from 0, the portable ECU
102 checks the ID code included in the request signal against the ID code stored in its own memory. If they match, the port output terminal 1
Supplies 10 and to the power supply terminal 214 to the power supply voltage V _cc1, V _cc2, frequency f ₁₁ in the modulated response signal and the frequency (f ₁₁ + f ₁₂₎ to the modulated response signal is an antenna 1
A command signal is supplied to the port output terminal 112 so that the command signal is transmitted from 06, 204 toward the vehicle 220.

The vehicle ECU 222 is connected to the outside transmitter 24.
When the outside request signal is transmitted from the antenna 30 of the vehicle, the switch ECU 232 drives the switch 232 to connect the vehicle ECU 222 to the first response code receiver 224. In this case, the vehicle 220 side, and can be amplified and demodulating only the response signal modulated to a frequency f _11. After the vehicle outside request signal is transmitted from the antenna 30 of the vehicle outside transmitter 24, the vehicle ECU 222 sets the frequency f ₁₁
Is received by the antenna 228 of the first response code receiver 224, the ID code included in the response signal is compared with the ID code stored in its own memory. If the ID codes match, it is determined that the authorized user has approached the vehicle 220 and
Alternatively, a command signal is supplied to the door lock actuator 40 so as to unlock or lock each door of the vehicle 220 as it moves away from the vehicle 220.

When the vehicle interior request signal is transmitted from the antenna 32 of the vehicle interior transmitter 26, the vehicle ECU 222 drives the switch 232 to switch the vehicle ECU 222 to the second response code receiver 226. Is conducted. In this case, the frequency of the vehicle 220 (f ₁₁
Only the response signal modulated to + f ₁₂ ) can be amplified and demodulated. The vehicle ECU 222 includes:
When a response signal modulated to the frequency (f ₁₁ + f ₁₂ ) is received by the antenna 230 of the second response code receiver 226 after the vehicle interior request signal is transmitted from the antenna 32 of the second response code, the response signal is included in the response signal. The ID code is compared with the ID code stored in its own memory. If the vehicles match, the authorized user is
Is supplied to the engine control unit 42 to start the engine of the vehicle 220.

As described above, in this embodiment, the portable device 2
00 receives a request signal from the vehicle 220 and always responds to the request signal, regardless of whether the transmission source is the exterior transmitter 24 or the interior transmitter 26, A plurality of response signals modulated to f ₁₁ and (f ₁₁ + f ₁₂ ) are transmitted. Also, the vehicle 220
Is made possible vehicle exterior request signal to receive only the response signal modulated to the frequency f ₁₁ is when it is transmitted through the exterior transmitters 24, the frequency of the subsequent emitted by the portable device 200 signals based on the modulated response signal to f _11, and controls the driving of the door lock actuator 40 for locking or unlocking the doors of the vehicle 220.
Further, it is possible cabin request signal to receive only the response signal modulated to a frequency (f ₁₁ + f ₁₂₎ When it is transmitted through the inside transmitter 26 emits then a portable device 200 The engine control unit 42 that starts the engine of the vehicle 220 is controlled based on the response signal modulated to the frequency (f ₁₁ + f ₁₂ ) among the signals.

Therefore, according to the system of the present embodiment, the portable device 200 that transmits a plurality of response signals having different frequencies in response to the request signal on the vehicle 220 side, and the plurality of response signals generated by the portable device 200 Vehicle 2 to receive selectively when locking / unlocking the door and when starting the engine
The use of the remote control 20 allows the user of the vehicle 220 to lock and unlock the doors of the vehicle 220 remotely and start the engine without any operation without performing any operation.

In the system of this embodiment, the portable device 20
0 always transmits two response signals having different frequencies in response to the request signal regardless of the source of the request signal on the vehicle 220 side, as described above. Therefore, it is unnecessary for the portable device 200 to transmit a response signal corresponding to the source of the request signal.
There is no need for the side to determine the source of the request signal. For this reason, according to the present embodiment, it is possible to reduce the burden of signal processing on the portable device 200 side, and the portable device 20
0 can be realized with a simple configuration.

Further, in the system of the present embodiment, after transmitting the request signal,
Of the two response signals having different frequencies from each other, a signal corresponding to an object to be remotely controlled (that is, the door lock actuator 40 and the engine control unit 42) is selected and received. In this regard, the case where each door of the vehicle 220 is locked and unlocked
In this case, the receivable frequencies when the vehicle 220 receives the response signal from the portable device 200 are different from each other. In this case, communication between the vehicle 130 and the portable device 100 becomes more complicated than when the receivable frequencies on the vehicle 220 side are the same. Therefore, according to the system of the present embodiment, in the transmission and reception of signals between the vehicle 220 and the portable device 200, the vehicle 22 is switched between when the door is locked and unlocked and when the engine is started.
Since the receivable frequencies on the 0 side are different from each other, the vehicle 22
0 is improved.

FIG. 8 shows a case where the portable device 200 of this embodiment transmits a call.
4 shows spectrum data of a response signal. The system of this embodiment
In the system, the portable device 200 includes an oscillation circuit of the resonator 120.
Wave number f₁₁And the oscillation frequency f of the resonator 216₁₂Using
And the frequency f₁₁, (F₁₁+ F ₁₂)
Send an answer signal. In general, the oscillation frequency f₁₁And oscillation frequency
Number f₁₂And whose output is about the same level as each other
Then, their sum (f₁₁+ F₁₂) And difference (f₁₁−
f₁₂The output levels of the components and the like are, as shown in FIG.
Number f₁₁, F₁₂Output level. Therefore,
In this embodiment, the portable device 200 compares the output levels.
High frequency f₁₁The response signal modulated to
6 and the frequency (f₁₁+
f₁₂) Is transmitted from the antenna 204.
I do.

The response signal transmitted from the antenna 106 is used to drive a door lock actuator 40 that locks and unlocks each door of the vehicle 220. The response signal transmitted from the antenna 204 is
Engine control unit 42 that starts the engine of vehicle 220
Used for control of When each door of the vehicle 220 is locked / unlocked, the vehicle 220 and the portable device 20 are locked.
Signal transmission / reception is performed in a situation where 0 is separated to some extent. On the other hand, when the engine of the vehicle 220 is started, after the user carrying the portable device 200 gets into the vehicle 220, the vehicle 220 and the portable device 200 approach each other, that is, the portable device 200 The transmission and reception of signals are performed under the condition of being in a room. Therefore, the output level of the signal generated by the vehicle 220 or the portable device 200 needs to be high to some extent when the door is locked or unlocked, but may be relatively low when the engine is started.

In this regard, in this embodiment, the output level of the response signal generated by the portable device 200 used when the door is locked / unlocked is relatively high, while the response signal generated by the portable device 200 used when starting the engine is output. Is relatively low, a response signal having an appropriate output level is transmitted from the portable device 200. In this case, since an appropriate output level is maintained without unnecessarily amplifying the response signal, it is possible to realize the portable device 200 without an unnecessary amplifier.

In this embodiment, since the output level of the response signal used at the time of starting the engine is relatively low, it is possible to prevent the response signal from being transmitted over a wide range. For this reason, the confidentiality of the response signal emitted from the portable device 200 when the engine is started is improved, and as a result, the anti-theft property of the vehicle 220 is improved.

By the way, the system according to the present embodiment is applied to the vehicle 2
The wireless communication between the portable device 200 and the portable device 200 allows the user to remotely start the engine of the vehicle 220 in a non-contact manner without any operation by the user.
In such a system, it is not necessary for the user to mount the portable device 200 at a specific position when starting the engine. Therefore, in this embodiment, after the start of the engine is completed,
It is necessary to check whether or not the portable device 200 has been taken out of the vehicle due to, for example, the driver being replaced or the luggage in the vehicle being handed out of the vehicle.

In the present embodiment, as a method for performing the above-described confirmation, the vehicle 220 transmits a vehicle interior request signal from the antenna 32 of the vehicle interior transmitter 26 and responds to the vehicle interior request signal to transmit the portable device 200. It is appropriate to receive a response signal issued by However, in such a case, the vehicle interior request signal is transmitted, and the switch 232 is driven to drive the vehicle ECU 222.
Is transmitted to the second response code receiver 226, the vehicle 220 can receive only a response signal with a low output level generated by the portable device 200. In this case, although portable device 200 is present in the vehicle,
There is a possibility that the portable device 200 is erroneously determined to have been taken out of the vehicle. Therefore, in determining whether or not the portable device 200 has been taken out of the vehicle, it is preferable that the vehicle 220 can receive a response signal having a high output level.

FIG. 9 is a flowchart showing an example of a control routine executed by the vehicle ECU 222 in this embodiment to realize the above-described functions. The routine shown in FIG.
This is a routine that is repeatedly started each time the processing is completed. When the routine shown in FIG. 9 is started, first, the process of step 250 is executed.

In step 250, it is determined whether or not the user has entered the vehicle 220 after the door of the vehicle 220 has been unlocked. In the present embodiment, when it is determined based on the output signal of the door open / close switch 38 that the door has been opened / closed, it is determined that the user has entered the vehicle 220. The process of this step is repeatedly executed until it is determined that the above condition is satisfied. As a result, when it is determined that the above condition is satisfied, the process of step 252 is executed next.

In step 252, a process for resetting the flag Fr indicating whether or not the start of the engine has been started to "0" is executed.

In step 254, the in-vehicle transmitter 2 is set so that the in-vehicle request signal is transmitted from the antenna 32.
6 is executed.

At step 256, the flag Fr is set to "0".
Is reset. Flag Fr
Is reset to “0”, the user
After riding in 20, it can be determined that the engine has not been started yet. Therefore, if such a determination is made,
Next, the process of step 258 is executed.

In step 258, a process of driving the switch 232 so that the second response code receiver 226 conducts with the vehicle ECU 222 is executed.

In step 260, the response signal from portable device 200 is received by second response code receiver 226,
In addition, it is determined whether or not the vehicle ID code included in the response signal matches the ID code stored in its own memory. As a result, if a positive determination is made, the process of step 262 is executed next. On the other hand, if a negative determination is made, the process of step 264 is performed next.

At step 262, a process of supplying a command signal to engine control unit 42 to start the engine is executed. After the process of step 262 is performed, the process of step 266 is next performed.

At step 264, it is determined whether or not the starter switch mounted on the vehicle 220 has been turned on by a user operation. The process of step 264 is repeatedly executed until the starter switch is turned on. As a result, if it is determined that the starter switch has been turned on, the process of step 266 is executed next.

At step 266, the flag Fr is set to "1".
Is performed.

In step 268, after the engine is started,
It is determined whether the door of the vehicle 220 is open or whether the window of the vehicle 220 is open. When the door is opened or the window is opened, there is a possibility that the driver will be changed or the luggage in the vehicle will be handed out of the vehicle through the window.
Therefore, if an affirmative determination is made in step 268, the process of step 254 is performed again to request a response from the portable device 200. On the other hand, when a negative determination is made, the portable device 200 is not taken out of the vehicle, and the process of step 270 is executed next.

At step 270, it is determined whether or not the user who has boarded vehicle 220 has exited vehicle 220. As a result, when it is determined that the user has not got off the vehicle 220, the process of step 268 is repeated. On the other hand, if it is determined that the user has got off the vehicle 220, the process of step 272 is executed next.

At step 272, processing for stopping the operation of the engine is executed. At step 274, the flag F
A process for resetting r to “0” is executed. When the process of step 274 ends, the current routine ends.

If the flag Fr has been set to "1" in step 256, the engine has already been started, and the portable device 200 is used to check whether or not the portable device 200 has been taken out of the vehicle. It can be determined that communication with the device 200 is necessary. Therefore, when such a determination is made, the process of step 276 is performed next.

In step 276, a process of driving the switch 232 so that the first response code receiver 224 conducts with the vehicle ECU 222 is executed.

In step 278, the response signal from the portable device 200 is received by the first response code receiver 224,
In addition, it is determined whether or not the vehicle ID code included in the response signal matches the ID code stored in its own memory. If the result of the determination is affirmative, the process of step 268 is performed next. On the other hand, if a negative determination is made, the process of step 280 is performed next.

In step 280, a process for driving a predetermined alarm device mounted on the vehicle 220 is executed, assuming that the portable device 200 has been taken out of the vehicle. In this case, the user is warned about taking the portable device 200 out of the vehicle 220. When the process of step 280 ends, the current routine ends.

According to the above processing, when the request signal to start the engine is transmitted, the portable device 2
00, the first response code receiver 224 that receives a signal having a low output level is selected.
When the request signal for confirming whether or not the portable device 200 has been taken out of the vehicle is transmitted to the portable device 200,
The second response code receiver 226 that receives a response signal with a high output level among the response signals generated by 0 is selected. In other words, vehicle 220 can receive only a response signal with a high output level when confirming that portable device 200 is taken out of the vehicle, even under the condition of transmitting a vehicle interior request signal.

For this reason, according to the present embodiment, the portable device 20
When the vehicle interior request signal is transmitted to confirm whether 0 has been taken out of the vehicle, the vehicle 220 cannot receive the response signal emitted from the portable device 200 even though the portable device 200 is present in the vehicle. Things can be avoided. Therefore, according to the system of the present embodiment, when confirming that the portable device 200 is taken out of the vehicle, the portable device 2
00 can be reliably prevented from being erroneously determined to have been carried out of the vehicle.

In the third embodiment, the first and second response code receivers 224 and 226 are described as "receiving means" in the claims, and the vehicle 220 is described in the claims. The transmission frequency of the response signal emitted by the portable device 200 corresponds to the “mobile body”, and corresponds to the “communication form” described in the claims.

By the way, in the third embodiment,
The portable device 200, when receiving the request signal from the vehicle 220, regardless of the source of the request signal, the port output terminal 110 and the power supply terminal 214 by supplying the power supply voltage V _cc1, V _cc2, always frequency Transmit two different response signals. For example, the source of the request signal is
4, the power supply voltage V is applied only to the port output terminal 110.
_cc1 supply, whereas, by the case originator of the request signal is inside transmitter 26 to supply the power supply voltage V _cc1, V _cc2 the port output terminal 110 and the power supply terminal 214, the originator of the request signal Two response signals having mutually different frequencies may be transmitted accordingly. still,
In this configuration, when the source of the request signal is outside transmitter 24, power supply voltage is supplied V _cc1 only port output terminal 110, is not that the power supply voltage V _cc2 to the power supply terminal 214 is supplied Therefore, the power saving effect of the portable device 200 is improved.

Next, FIG. 10 and FIG.
A fourth embodiment of the present invention will be described with reference to FIG. The portable device of this embodiment is realized by applying a voltage to the port output terminals 110 and 112 as shown in FIG. 4B in the portable device 100 shown in FIG. In this case, FS is sent from antenna 106 of response code transmitter 104.
The K signal is transmitted as a response signal.

FIG. 10 shows frequency spectrum data when a response signal emitted from the portable device 100 is received by a wideband antenna such as a log periodic antenna. The response signal generated by the portable device 100 includes the oscillation frequency f
_A plurality of frequency components that are integral multiples of ₁₁ are included. The output level of this frequency component, as shown in FIG. 10, in principle, the smaller the ratio to the oscillation frequency f ₁₁ is large. However, in general, the output level when the magnification for the oscillation frequency f ₁₁ is an odd multiple is higher than that of when the magnification is an even multiple.

FIG. 11 is a configuration diagram of a main part of a vehicle 310 provided in the system of this embodiment. Vehicle 310 of the present embodiment
Is realized by using the third response code receiver 312 instead of the second response code receiver 226 in the configuration shown in FIG. Third response code receiver 312
It has an antenna 314, a circuit for amplifying and demodulating a signal having a predetermined frequency 2 · f ₁₁ received by the antenna 314. First and third response code receivers 224, 31
Switch 2 interposed between ECU 2 and vehicle ECU 222
32, according to a command signal from the vehicle ECU 222,
The ECU 222 for the vehicle is selectively connected to the first or third response code receivers 224, 312.

In the above system, the vehicle ECU 2
The switch 22 drives the switch 232 to conduct the vehicle ECU 222 to the first response code receiver 224 when the outside request signal is transmitted from the antenna 30 of the outside transmitter 24. In this case, the vehicle 310
It is enabled to receive only the response signal modulated to a frequency f _11. When the vehicle interior request signal is transmitted from the antenna 32 of the vehicle interior transmitter 26, the vehicle ECU 222 drives the switch to make the vehicle ECU 222 conductive to the third response code receiver 312. In this case, vehicle 310 is enabled to receive only the modulated response signal to a frequency 2 · f _11.

[0121] In this embodiment, portable device 100, when receiving the request signal from the vehicle 310, transmits a response signal modulated to a frequency f ₁₁ in response to the request signal. In addition, after the vehicle outside request signal is transmitted via the vehicle outside transmitter 24, the vehicle 310
Based on the 00 response signal modulated to a frequency f ₁₁ emitted the controls the driving of the door lock actuator 40 to lock or unlock the doors. Further, based on the frequency component 2 · f ₁₁ of the response signal emitted in the mobile device 100 after the vehicle compartment request signal is transmitted through the inside transmitter 26 controls the engine control unit 42 to start the engine.

Therefore, according to the system of the present embodiment, a plurality of frequency components (f ₁₁ and 2 · f ₁₁ ) of the response signal generated by the portable device 100 are transmitted to the vehicle 310 when the door is locked / unlocked and when the engine is started. It is possible to lock and unlock each door of the vehicle 310 and start the engine remotely without contact by the user of the vehicle 310 in a non-contact manner without performing any operation by selecting and receiving the time. Become.

In the system of this embodiment, the portable device 10
0, when receiving a request signal from exterior transmitters 24 or inside transmitter 26 of the vehicle 310, transmits a response signal modulated on a single frequency f ₁₁ in response to the request signal. In this case, similarly to the case of the third embodiment, it is not necessary to determine the source of the request signal on the portable device 100 side, so that the burden of signal processing on the portable device 100 side is reduced, and the portable device 100 The configuration is simplified.

Further, in the system of the present embodiment, after transmitting the outside request signal or the inside request signal, the vehicle 310 transmits the door signal to be remotely controlled among the two frequency components of the response signal generated by the portable device 100. A component corresponding to the lock actuator 40 and the engine control unit 42 is selected and received. In this regard, when the doors of the vehicle 310 are locked and unlocked remotely and when the engine of the vehicle 310 is remotely started,
Receivable frequencies when the vehicle 310 receives the response signal from the portable device 100 are different from each other. Therefore, according to the system of the present embodiment, as in the third embodiment, the communication between the vehicle 310 and the portable device 100 becomes complicated, thereby improving the antitheft property of the vehicle 310.

[0125] In general, the output level of the frequency component 2 · f ₁₁ of the response signal emitted by the mobile device 100, as shown in FIG. 10, smaller than that of the oscillation frequency f _11. By the way, in the present embodiment, the engine is started in a situation where the vehicle 310 and the portable device 100 are approaching each other.
When starting the engine, it is not necessary to increase the output level of the response signal generated by the portable device 200. When the output level of the response signal is high at the time of starting the engine, the receivable area is increased by that amount, and the confidentiality of the response signal used at the time of starting the engine is reduced.

In this respect, in this embodiment, the output level of the response signal generated by the portable device 100 used when the door is locked / unlocked is high, while the output signal of the response signal generated by the portable device 100 used when starting the engine is output. Level is low. Therefore, according to the present embodiment, the frequency component of the response signal having an appropriate output level is selected when the door is locked / unlocked and when the engine is started, so that the confidentiality of the response signal used when starting the engine is selected. As a result, the antitheft property of the vehicle 310 is improved.

Also in this embodiment, as in the third embodiment, when a request signal for in-vehicle interior is transmitted to start the engine, the output level of the frequency component of the response signal generated by the portable device 100 is reduced. Third to receive low
While the response code receiver 312 is selected, the portable device 10
When the request signal is transmitted to confirm whether or not 0 has been taken out of the vehicle, the first response code receiver 224 receives a high output level among the frequency components of the response signal generated by the portable device 100. May be selected. According to this system, as in the third embodiment, when confirming that the portable device 100 is taken out of the vehicle, it is possible to avoid a situation where the vehicle 310 cannot receive the frequency component of the response signal generated by the portable device 100. Accordingly, it is possible to reliably prevent erroneous determination that the portable device 100 has been taken out of the vehicle.

In the fourth embodiment, the first and third response code receivers 224 and 312 are described as "receiving means" described in the claims, and the vehicle 310 is described in the claims. The frequency component of the response signal emitted from the portable device 100 corresponds to the “communication form” described in the claims.

In the first to fourth embodiments, the portable device 50 functions as a device for remotely locking or unlocking each door of the vehicle 20 in a non-contact manner. Function as a device to control the start and stop of the engine mounted on the
Although the communication mode of the signal between the vehicle 20 and the portable device 50 is changed, the present invention is not limited to this, and the case where the steering is locked / unlocked using the portable device 50 or the engine For example, when the immobilizer function of permitting / prohibiting the fuel supply is realized, the communication mode described above may be changed.

In the first to fourth embodiments, the communication mode of the response signal generated by the portable device differs between when the door is locked / unlocked and when the engine is started. The communication forms of the issued request signals may be different from each other. In such a configuration, the communication between the vehicle and the portable device is complicated, and the antitheft property of the vehicle is improved. In this case, a request signal with a high output level is transmitted when the door is locked or unlocked, and a request signal with a low output level is transmitted when the engine is started, so that the confidentiality of the request signal at the time of engine start is improved. In addition, it is possible to further improve the antitheft property.

[0131]

As described above, according to the first and fourth aspects of the present invention, it is possible to improve the anti-theft property of the moving body.

According to the second aspect of the present invention, when the plurality of devices are remotely controlled, the form of communication of the request signal is made different from each other, so that the antitheft property of the mobile body can be improved.

According to the third aspect of the present invention, when a plurality of devices are respectively remotely controlled, response signals having different communication modes are received, thereby improving the antitheft property of the mobile body.

According to the fifth aspect of the invention, by preventing the confidentiality of the request signal from being reduced, it is possible to improve the antitheft property of the mobile body.

According to the sixth aspect of the invention, each time the device is remotely controlled, the communication mode of the response signal to be emitted from the portable device is instructed, thereby further improving the antitheft property of the mobile body. Can be.

According to the invention of claim 7, by receiving response signals having different transmission frequencies for each remotely controlled device, it is possible to improve the antitheft property of the mobile body.

According to the eighth aspect of the present invention, by transmitting response signals having different communication modes for each remotely controlled device, it is possible to improve the antitheft property of the mobile body.

According to the ninth aspect of the invention, every time the device is remotely controlled, a response signal having a communication form in accordance with an instruction from the mobile unit is transmitted, thereby improving the antitheft property of the mobile unit. Can be planned.

According to the tenth aspect, when the device is remotely controlled, a plurality of response signals having different communication modes are transmitted, thereby improving the antitheft property of the mobile body.

According to the eleventh aspect of the present invention, it is possible to improve the antitheft property of the mobile body by preventing the confidentiality of the response signal from being reduced.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a mobile device remote control device according to a first embodiment of the present invention.

FIG. 2 is a system configuration diagram of a mobile device remote control device according to a second embodiment of the present invention.

FIG. 3 is an internal configuration diagram of a transmitter mounted on the portable device of the present embodiment.

FIG. 4A is a diagram showing a time change of a voltage applied to two output terminals in a code generation unit of a portable device when an ASK signal is transmitted from a transmitter mounted on the portable device in the present embodiment. FIG. FIG. 4B shows a time change of a voltage applied to two output terminals in the code generation unit of the portable device when the FSK signal is transmitted from the transmitter mounted on the portable device in the present embodiment. FIG.

FIG. 5 is an internal configuration diagram of a receiver mounted on the vehicle of the embodiment.

FIG. 6 is an internal configuration diagram of a portable device provided in a system according to a third embodiment of the present invention.

FIG. 7 is a configuration diagram of a main part of a vehicle included in the system of the present embodiment.

FIG. 8 is spectrum data of a response signal transmitted by the portable device of the present embodiment.

FIG. 9 is a flowchart of an example of a control routine executed in the vehicle according to the embodiment.

FIG. 10 shows frequency spectrum data when a response signal generated by the portable device according to the fourth embodiment of the present invention is received by a wideband antenna.

FIG. 11 is a main part configuration diagram of a vehicle included in the system of the present embodiment.

[Explanation of symbols]

20, 130, 220, 310 Vehicle 22, 132, 222 Vehicle electronic control unit (vehicle ECU) 24 Vehicle exterior transmitter 26 Vehicle interior transmitter 28, 134, 224, 226, 312 Response code receiver 40 Door lock actuator 42 Engine control unit 50, 100, 200 Portable device 52, 102 Portable electronic control unit (portable EC
U) 54 request receiver 56 first transmitter 58 second transmitter 104, 202 response code transmitter

Claims (11)

[Claims] A transmitting unit that transmits a request signal requesting a response from the portable device; and a receiving unit that receives a response signal generated by the portable device, wherein the receiving signal is included in the response signal received by the receiving device. A mobile device remote control device for remotely controlling a plurality of devices mounted on a mobile device based on a code, wherein the request signals or the responses are different from each other in a communication form of the plurality of devices. A remote control device for a mobile device, wherein the remote control is performed using a signal. 2. The mobile device remote control device according to claim 1, wherein the transmission unit transmits the request signals having different communication modes when the plurality of devices are remotely controlled. A remote controller for a mobile device. 3. The mobile device remote control device according to claim 1, wherein the plurality of devices are remotely controlled based on codes of the response signals having different communication forms. Body equipment remote control device. 4. A transmitting device for transmitting a request signal requesting a response from the portable device, and a receiving device for receiving a response signal from the portable device, wherein the receiving signal is included in the response signal received by the receiving device. A mobile device remote control device for remotely controlling a plurality of devices mounted on the mobile object based on a code, wherein the transmission unit is configured to transmit the request signal having a different communication mode for each predetermined area. A remote control device for a mobile device, characterized by transmitting: 5. The remote control apparatus for a mobile device according to claim 2, wherein the request signals having different communication modes are signals having different output levels. apparatus. 6. A transmitting device for transmitting a request signal for requesting a response from the portable device, and a receiving device for receiving a response signal from the portable device, wherein the receiving signal is included in the response signal received by the receiving device. A mobile device remote control device for remotely controlling a plurality of devices mounted on the mobile object based on the code, wherein the transmitting unit is configured to control the plurality of devices when each of the plurality of devices is remotely controlled. Transmitting the request signal including a predetermined instruction code for instructing the communication mode of the response signal to be issued by the portable device, and receiving the response signal having the communication mode instructed to the portable device; A remote controller for a mobile device. 7. A transmitting device for transmitting a request signal requesting a response from the portable device, and a receiving device for receiving a response signal from the portable device, wherein the receiving signal is included in the response signal received by the receiving device. A mobile device remote control device for remotely controlling a plurality of devices mounted on a mobile object based on a code, wherein the receiving unit has a different transmission frequency for each device to be remotely controlled. A remote controller for a mobile device, which receives the response signal. 8. A mobile portable device for transmitting a response signal in order to remotely control a device mounted on a mobile body when receiving a request signal transmitted from the mobile body, the mobile device comprising: A mobile portable device, wherein, when performing remote control, the response signals having different communication modes are transmitted for each of the devices. 9. A mobile portable device for transmitting a response signal in order to remotely control a device mounted on a mobile body when receiving a request signal transmitted from the mobile body, the mobile device comprising: A mobile portable device for transmitting a response signal having a communication form in accordance with a predetermined instruction code included in the request signal when performing remote control. 10. A mobile portable device for transmitting a response signal to remotely control a device mounted on a mobile body when receiving a request signal transmitted from the mobile body, the mobile device comprising: A mobile portable device characterized by transmitting a plurality of response signals having different communication modes when performing remote control. 11. The mobile portable device according to claim 8, wherein the response signals having different communication modes are signals having different output levels.