CN218387926U

CN218387926U - EMC darkroom test system for V2X equipment

Info

Publication number: CN218387926U
Application number: CN202222340634.4U
Authority: CN
Inventors: 李国锋
Original assignee: Zhidao Network Technology Beijing Co Ltd
Current assignee: Zhidao Network Technology Beijing Co Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2023-01-24
Anticipated expiration: 2032-09-02

Abstract

The application discloses EMC darkroom test system for V2X equipment, wherein, the system includes EMC test darkroom, still includes: be located outside outdoor GPS antenna module of EMC test darkroom is located the ware is divided to inside a set of V2X test equipment of EMC test darkroom and GPS merit, the input that the ware was divided to the GPS merit with the darkroom cable interface electric connection of EMC test darkroom, the output that the ware was divided to the GPS merit with a set of V2X test equipment is electric connection respectively. Realize that V2X equipment can carry out EMC darkroom test through this application.

Description

EMC darkroom test system for V2X equipment

Technical Field

The application relates to the technical field of automatic driving equipment testing, in particular to an EMC darkroom testing system for V2X equipment.

Background

The V2X equipment is applied to the field of vehicle-road cooperation and can provide communication among vehicles, roads and vehicles; the V2X equipment needs positioning and time information provided by a GPS module to realize the basic functions; generally, a common GPS module is adopted, a typical circuit structure is shown in fig. 1, when a V2X device is tested, an external active GPS antenna is usually connected to a GPS unit inside the V2X device, and a V2X antenna is connected to a V2X unit inside the device. When testing the V2X devices, two devices need to be connected in parallel (as shown in fig. 2), GPS antennas of the two devices receive and analyze satellite signals, and V2X antennas of the two devices perform transceiving communication.

However, when the V2X device is used for EMC testing in a darkroom, the darkroom is in a fully metal shielded environment and does not have a GPS signal, and usually only one rf connection line is provided to the outside of the darkroom, so that the V2X device cannot normally communicate for testing.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an EMC darkroom test system for V2X equipment to realize that V2X equipment can carry out EMC darkroom test.

The embodiment of the application adopts the following technical scheme:

the embodiment of the application provides an EMC darkroom test system for V2X equipment, wherein, the system includes EMC test darkroom, still includes: an outdoor GPS antenna module positioned outside the EMC test darkroom, a group of V2X test equipment and a GPS power divider positioned inside the EMC test darkroom,

the input of GPS merit divides the ware with the darkroom cable interface electric connection of EMC test darkroom is used for switching GPS signal extremely EMC test darkroom, the output of GPS merit divides the ware with a set of V2X test equipment is electric connection respectively.

In some embodiments, the input terminal of the GPS power divider is used for direct current power supply.

In some embodiments, the output of the GPS power divider is used for dc-through power supply.

In some embodiments, the GPS power divider comprises a microstrip line type power divider without a dc blocking capacitor.

In some embodiments, a high gain LNA amplifier is employed in the outdoor GPS antenna module.

In some embodiments, the input terminal of the GPS power divider is electrically connected to the darkroom cable interface of the EMC testing darkroom through a radio frequency patch cord.

In some embodiments, the output end of the GPS power divider is electrically connected to the group of V2X test devices through cables, respectively.

In some embodiments, the GPS supply voltage within the set of V2X test devices is supplied with a preset nominal voltage.

In some embodiments, the outdoor GPS antenna module comprises: a GPS active antenna for receiving satellite GPS signals.

In some embodiments, the set of V2X test devices comprises: each V2X test device carries out transceiving communication through a V2X antenna, and a GPS antenna of each V2X test device is connected to an output port of the GPS power divider.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

through being located EMC test darkroom is outside outdoor GPS antenna module is located inside a set of V2X test equipment and the GPS merit of EMC test darkroom divide the ware, further the input of GPS merit divide the ware with darkroom cable interface electric connection of EMC test darkroom is used for switching GPS signal extremely EMC test darkroom, the output of GPS merit divide the ware with a set of V2X test equipment electric connection respectively. GPS signals received by the outdoor active antenna are respectively sent to the V2X equipment to be tested in a power divider mode, so that normal work, simplicity and effectiveness of the V2X equipment in the shielding darkroom are guaranteed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram of a circuit structure of a V2X device and a GPS module in the related art;

FIG. 2 is a circuit diagram of a V2X device test scheme in the related art;

fig. 3 is a schematic circuit structure diagram of an EMC darkroom test system for V2X devices in the embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

To the unable normal work of V2X equipment in the darkroom environment, can't carry out the problem of EMC test, the system in the embodiment of this application provides an EMC darkroom test scheme suitable for V2X equipment, gives the V2X equipment that awaits measuring respectively through the merit ware mode with the GPS signal that outdoor active antenna received to the normal work of V2X equipment in the darkroom of assurance shielding GPS signal.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

The embodiment of the present application provides an EMC darkroom test system for V2X equipment, as shown in fig. 3, provides an EMC darkroom test system schematic diagram for V2X equipment in the embodiment of the present application, an EMC darkroom test system for V2X equipment, wherein, the system includes EMC test darkroom 101, further includes: the EMC test darkroom comprises an outdoor GPS antenna module 102 positioned outside the EMC test darkroom 101, a group of V2X test devices (103, 105) positioned inside the EMC test darkroom 101 and a GPS power divider 104, wherein the input end of the GPS power divider 104 is electrically connected with a darkroom cable interface of the EMC test darkroom 101 and is used for switching a GPS signal to the EMC test darkroom, and the output end of the GPS power divider 104 is electrically connected with the group of V2X test devices (103, 105) respectively.

Specifically, the EMC test darkroom 101 adopts the same test darkroom in the related art, and the EMC test darkroom has only one cable connection port.

The EMC test darkroom comprises an outdoor GPS antenna module 102, and the outdoor GPS antenna module 102 is used for receiving GPS signals of satellites.

The set of V2X test equipment (103, 105) is located inside the EMC test darkroom 101. During testing, the group of V2X testing equipment (103, 105) needs to be arranged inside the EMC testing darkroom 101. The set of V2X test equipment (103, 105) is the same as that used in the related art and placed in a test darkroom for transceiving communications via a V2X antenna. The set of V2X test devices (103, 105) serves as devices under test.

It should be noted that the external active GPS antenna of each of the V2X test devices is connected to the V2X device internal GPS unit, and the V2X antenna is connected to the device internal V2X unit.

The GPS power divider 104 is also disposed inside the EMC test darkroom 101. The input end of the GPS power divider 104 is electrically connected to the darkroom cable interface of the EMC testing darkroom 101 for switching a GPS signal to the EMC testing darkroom. In addition, the output end of the GPS power divider 104 is electrically connected to the group of V2X test devices (103, 105), respectively.

Considering that the EMC test darkroom 101 has only one cable connection port, the GPS power divider 104 is required to introduce an amplified GPS signal from the outside, and then the amplified GPS signal is divided into two GPS ports to be respectively sent to the two sets of V2X test devices (103, 105) to be tested.

Based on the test system in the embodiment of the application, the specific test method is as follows:

firstly, an EMC darkroom test system for V2X equipment is configured according to the circuit structure shown in fig. 3, the system includes an EMC test darkroom, and further includes: and the outdoor GPS antenna module is positioned outside the EMC test darkroom, and a group of V2X test equipment and a GPS power divider are arranged inside the EMC test darkroom.

And secondly, electrically connecting the input end of the GPS power divider with a darkroom cable interface of the EMC test darkroom for transferring a GPS signal to the EMC test darkroom, and electrically connecting the output end of the GPS power divider with the group of V2X test equipment respectively.

Finally, EMC testing is carried out based on the arrangement, and the problems that when V2X equipment is subjected to EMC testing in a darkroom, the darkroom is in a full-metal shielding environment and does not have GPS signals are solved. In the process of EMC testing, a group of V2X equipment to be tested can still work normally, time synchronization information provided by the GPS module is used, the GPS antenna can acquire a satellite during normal testing and then analyze the satellite to provide a time synchronization signal, and the two V2X equipment are in wireless communication through the V2X antenna.

In an embodiment of the present application, an input terminal of the GPS power divider is configured to be directly powered by dc power.

In an embodiment of the present application, an output terminal of the GPS power divider is used for direct current power supply.

In one embodiment of the present application, the GPS power divider includes a microstrip line type power divider without a dc blocking capacitor. Considering that an amplifier of an outdoor active GPS antenna needs to supply power to V2X equipment in a darkroom, when the GPS power divider is selected, an input end and an output end of the GPS power divider can be directly supplied with direct current, and a microstrip line type power divider without a blocking capacitor is selected as much as possible.

In one embodiment of the present application, a high gain LNA amplifier is used in the outdoor GPS antenna module. Considering that the GPS antenna of the outdoor GPS antenna module is outdoors and is switched through a darkroom cable, which results in a long GPS communication link cable and an attenuation effect of a power divider, the gain of the LNA amplifier inside the active GPS antenna cannot be too low.

Specifically, the gain of the LNA amplifier can be controlled within the range of 30dB +/-5 dB, namely 25dB to 35dB according to the 30dB standard and the typical gain value.

In an embodiment of the application, the input terminal of the GPS power divider is electrically connected to a darkroom cable interface of the EMC testing darkroom through a radio frequency transfer line. The radio frequency transfer circuit is located in the EMC test darkroom and is only one, and when the radio frequency transfer circuit is used, the radio frequency transfer circuit needs to be connected with the input end of the GPS power divider.

In an embodiment of the application, the output end of the GPS power divider is electrically connected to the group of V2X test devices through cables, respectively.

In one embodiment of the present application, the GPS power supply voltage inside the group of V2X test devices is supplied with a preset rated voltage. The GPS supply voltage inside the V2X device cannot be too low either because the communication cable is long.

Specifically, the internal GPS supply voltage of the V2X device may be maintained between 3.3V and 5V.

In one embodiment of the present application, the outdoor GPS antenna module includes: a GPS active antenna for receiving satellite GPS signals.

In the specific implementation, considering that only one radio frequency adapter circuit in the EMC darkroom can connect the external radio frequency cable to the interior of the darkroom, the GPS signal in the outdoor GPS antenna module is selected to be switched to the darkroom. The outdoor GPS antenna module adopts a common GPS active antenna outside, and needs to be capable of receiving satellite GPS signals as same as those used in the related art.

In one embodiment of the present application, the set of V2X test devices includes: each V2X test device carries out transceiving communication through a V2X antenna, and a GPS antenna of each V2X test device is connected to an output port of the GPS power divider.

In specific implementation, each V2X test apparatus is consistent with the related art. Placing the test sample in a test darkroom to be used as a device to be tested.

Each V2X test device performs transceiving communication through a V2X antenna, and the GPS antennas of the two V2X test devices need to be connected to the output port of the GPS power divider.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. An EMC darkroom test system for V2X equipment, wherein the system comprises an EMC test darkroom, further comprising: an outdoor GPS antenna module positioned outside the EMC test darkroom, a group of V2X test equipment and a GPS power divider positioned inside the EMC test darkroom,

the input end of the GPS power divider is electrically connected with a darkroom cable interface of the EMC test darkroom, and the output end of the GPS power divider is electrically connected with the group of V2X test equipment respectively.

2. The system of claim 1, wherein the input of the GPS power divider is configured to pass through dc power.

3. The system of claim 1, wherein the output of the GPS power divider is configured to pass dc power.

4. A system as claimed in claim 1, 2 or 3, wherein the GPS power divider comprises a microstrip line type power divider without a dc blocking capacitance.

5. The system of claim 1, wherein a high gain LNA amplifier is used in the outdoor GPS antenna module.

6. The system of claim 1, wherein the input of the GPS power divider is electrically connected to the darkroom cable interface of the EMC test darkroom via a radio frequency patch cord.

7. The system of claim 1, wherein the output terminal of the GPS power divider and the set of V2X testing devices are electrically connected by a cable, respectively.

8. The system of claim 6 or 7, wherein the GPS supply voltage inside the group of V2X test devices is supplied with a preset rated voltage.

9. The system of any one of claims 1, 2, 3, 5, 6, or 7, the outdoor GPS antenna module comprising: a GPS active antenna for receiving satellite GPS signals.

10. The system of any of claims 1, 2, 3, 5, 6, or 7, the set of V2X test devices comprising: each of the two V2X test devices performs transceiving communication through a V2X antenna, and a GPS antenna of each of the V2X test devices is connected to an output port of the GPS power divider.