JP2018058549A - Anti-theft security system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anti-theft security system for a vehicle that is reduced in cost.SOLUTION: An anti-theft security system for a vehicle is installed to a side door 2 of a vehicle to detect an impact on the side door 2 and an anti-theft ECU 13 determines theft in accordance with a detection value of an air bag pressure sensor 11 for actuating an air bag. Thus, the air bag pressure sensor 11 for actuating an air bag can be also used for detecting theft, thereby reducing cost.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle antitheft device.

  As the above-described vehicle antitheft device, for example, a vehicle antitheft device described in Patent Document 1 is known. The antitheft device for a vehicle described in Patent Document 1 causes an alarm device to issue an alarm based on the fact that detection values output from a sound sensor, a vibration sensor, and a tilt sensor indicate an abnormality.

JP 2009-166511 A

  However, in the above-described conventional vehicle theft device, it is necessary to install a sensor dedicated to the vehicle antitheft device, which increases the cost accordingly.

  Then, this invention makes it a subject to provide the antitheft device for vehicles which aimed at the cost reduction.

  The present invention for solving the above-described problems is attached to a door of a vehicle, detects an impact on the door, and activates an airbag according to a detection value of the impact detection sensor. Theft determination means for determining theft is provided.

  According to the present invention, the impact detection sensor can be used for both the airbag operation and the theft determination, and the cost can be reduced.

It is a block diagram showing one embodiment of the antitheft device for vehicles of the present invention. (A) And (B) is the side view of the outer side of the side door in which the antitheft device for vehicles shown in Drawing 1 is built, and the outline perspective view of the inside.

  The invention described in claim 1 is attached to a door of a vehicle, detects an impact on the door, and determines theft according to a detection value of an impact detection sensor for operating an airbag. The detection sensor can be used for both the airbag operation and the theft determination, and the vehicle antitheft device is capable of reducing the cost.

  A vehicle antitheft device 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a block diagram showing an embodiment of a vehicle antitheft device 1 according to the present invention. FIG. 2 is a schematic cross-sectional view of a side door 2 incorporating the vehicle antitheft device 1 shown in FIG. As shown in the figure, the vehicle antitheft device 1 includes an airbag pressure sensor 11 as an impact detection sensor, an airbag ECU 12 as an airbag control means, an antitheft ECU 13 as a theft determination means, and an alarm. And a device 14.

  As shown in FIG. 2, the airbag pressure sensor 11 is a sensor that is attached to the side door 2 of the vehicle, detects an impact on the side door 2 (door), and operates the airbag.

  First, the configuration of the side door 2 will be described before the airbag pressure sensor 11 is described. The side door 2 is schematically configured to include a door outer panel 21, a window glass 22, a key cylinder 23, and a door handle 24. The door outer panel 21 is made of metal such as steel or aluminum. The window glass 22 is made of tempered glass, for example. The key cylinder 23 is provided inside the door outer panel 21 and is rotated by a vehicle key to lock and unlock the side door 2. The door handle 24 is used to open and close the side door 2.

  When a collision with the side door 2 occurs, the door outer panel 21 is recessed inwardly and changes its shape. The airbag pressure sensor 11 is attached to the door outer panel 21 and detects a change in the shape of the door outer panel 21 as an impact on the side door 2. More specifically, the airbag pressure sensor 11 is composed of, for example, a strain gauge whose resistance changes when deformed, and the strain gauge is attached to the inner surface of the door outer panel 21. The airbag pressure sensor 11 outputs a value corresponding to the resistance value of the strain gauge as a detection value.

  The airbag ECU 12 is an ECU that controls the operation of an airbag (not shown). The airbag ECU 12 takes in the detected value of the airbag pressure sensor 11 and determines that a side collision has occurred if the detected value is a large impact within the first predetermined range, and activates the airbag.

  Also, when the key cylinder 23 is destroyed and theft is attempted, an impact is applied to the door outer panel 21, so that the door outer panel 21 is greatly deformed. However, the deformation of the shape of the door outer panel 21 at the time of theft is smaller than that at the time of a collision that normally requires the airbag to be activated. The anti-theft ECU 13 is an ECU that determines the occurrence of the theft and controls the operation of the alarm device 14. The anti-theft ECU 13 takes in the detection value of the airbag pressure sensor 11 and determines that anti-theft has occurred if the detection value is a second predetermined range with a smaller impact than the first predetermined range. Then, the alarm device 14 is activated.

  The alarm device 14 is composed of, for example, a horn, a hazard lamp, and the like, and notifies the occurrence of the theft by sound or vision. As the alarm device 14, not only a horn or a hazard lamp that is already mounted on the vehicle but also a dedicated burglar alarm may be provided.

  According to the above-described embodiment, the anti-theft ECU 13 determines the theft according to the detection value of the airbag pressure sensor 11 for activating the airbag, so that the airbag pressure sensor 11 is used for the airbag operation. And theft determination, and cost reduction can be achieved.

  Further, according to the above-described embodiment, the airbag ECU 12 operates the airbag when the detection value of the airbag pressure sensor 11 is equal to or greater than the first predetermined range, and the anti-theft ECU 13 performs the airbag pressure sensor 11. When the detected value is within the second predetermined range where the impact is smaller than the first predetermined range, it is determined that the theft has occurred. Thereby, even if one airbag pressure sensor 11 is used for both the airbag operation and the theft determination, the side collision and theft occurrence can be distinguished and determined.

  Moreover, according to embodiment mentioned above, the pressure sensor which detects the shape change of the door outer panel 21 of the side door 2 is used as an impact detection sensor. For this reason, it is possible to accurately distinguish and determine collision and theft.

  Moreover, according to embodiment mentioned above, the pressure sensor 11 for airbags is provided in the side door 2 in which the key cylinder 23 is provided. For this reason, it is possible to distinguish and determine the side collision and theft by destroying the key cylinder 23.

  In addition, according to embodiment mentioned above, although the pressure sensor 11 comprised from the strain gauge was used as an impact detection sensor, it is not restricted to this. The impact detection sensor may be any sensor that can detect an impact applied to the side door 2, and includes an acceleration sensor that detects the acceleration of the door outer panel 21 and an inclination sensor that detects the inclination of the door outer panel 21. May be.

  In addition, according to the above-described embodiment, the anti-theft ECU 13 fetches the detection value directly from the airbag pressure sensor 11, but the invention is not limited to this. The vehicle theft ECU may capture the detection value from the airbag pressure sensor 11 via the airbag ECU 12.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

1 Vehicle anti-theft device 2 Side door (door)
11 Air pressure sensor (impact detection sensor)
12 Airbag ECU (airbag control means)
13 anti-theft ECU (theft judging means)
21 Door outer panel

Claims (4)

An impact detection sensor attached to a vehicle door for detecting an impact on the door and activating an airbag;
A theft determination means for determining theft according to the detection value of the impact detection sensor;
An antitheft device for a vehicle, comprising: An airbag control means for operating the airbag according to the detection result of the impact detection sensor;
The airbag control means operates the airbag when the detection value of the impact detection sensor is equal to or greater than a first predetermined range,
2. The vehicle theft according to claim 1, wherein the theft determination unit determines the theft when the detection value of the impact detection sensor is in the second predetermined range where the impact is smaller than the first predetermined range. Prevention device. The vehicle antitheft device according to claim 1, wherein the impact detection sensor includes a sensor that detects a shape change of a door outer panel of the door. The said door is a side door of a vehicle. The vehicle antitheft device of any one of Claims 1-3 characterized by the above-mentioned.

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