CN115987845B - V2X equipment testing system and method - Google Patents
V2X equipment testing system and method Download PDFInfo
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- CN115987845B CN115987845B CN202310251969.5A CN202310251969A CN115987845B CN 115987845 B CN115987845 B CN 115987845B CN 202310251969 A CN202310251969 A CN 202310251969A CN 115987845 B CN115987845 B CN 115987845B
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Abstract
The application discloses a test system and a test method of V2X equipment, wherein the system comprises a GPS signal simulator for simulating GPS signals; the external GPS module is used for receiving the GPS signals in the GPS signal simulator and demodulating the GPS signals into GPS baseband synchronous information, wherein the external GPS module continuously works in the test process; the first V2X device is used for receiving the GPS baseband synchronization information sent by the external GPS module, wherein the first V2X device switches an internal GPS module connected with a main controller of the first V2X device into the external GPS module according to a test instruction; and the second V2X device is used for being in communication connection with the first V2X device and used as auxiliary test equipment. According to the method and the device, the testing system of the V2X equipment can be optimized, the testing efficiency is improved, and the testing time consumption is reduced.
Description
Technical Field
The application relates to the technical field of communication equipment, in particular to a testing system and method of V2X equipment.
Background
The V2X device is used as necessary vehicle-mounted equipment in the vehicle-road cooperation field, and can provide communication among vehicles, roads and vehicle-clouds. The V2X device needs positioning and time information provided by the GPS module to realize basic functions such as communication, so that the V2X device generally adopts a common GPS module.
A typical circuit structure is shown in FIG. 1, wherein a V2X module main control part (V2X module main control CPU) on a V2X device main board receives positioning and time service information provided by an internal GPS module, time and positioning data are generally transmitted through an NMEA-0183 code stream in a physical serial port mode, and second pulse is transmitted through a 1pps level signal.
In the related art, the normal operation of the V2X device depends on the GPS synchronization information, and the GPS signal in the factory is weak, so that a wired test is required by adding a GPS signal amplifier or using a GPS signal simulator. Specific test scheme as shown in fig. 2, a GPS signal simulator was used to provide GPS signals to V2X devices. However, the following disadvantages still exist in the related art:
because the GPS signal simulator provides a signal for one V2X device, the V2X device cannot establish synchronization with other tested V2X devices;
because the GPS terminal is electrified to acquire the long synchronization time, the time of testing a single V2X device in a factory is also indirectly caused to be long.
Disclosure of Invention
The embodiment of the application provides a testing system and a testing method of V2X equipment, so as to improve the efficiency of testing the V2X equipment in a factory.
The embodiment of the application adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides a test system for a V2X device, where the system includes:
the GPS signal simulator is used for simulating GPS signals;
the external GPS module is used for receiving the GPS signals in the GPS signal simulator and demodulating the GPS signals into GPS baseband synchronous information, wherein the external GPS module continuously works in the test process;
the first V2X device is used for receiving the GPS baseband synchronization information sent by the external GPS module, wherein the first V2X device switches an internal GPS module connected with a main controller of the first V2X device into the external GPS module according to a test instruction;
and the second V2X device is used for being in communication connection with the first V2X device and used as auxiliary test equipment.
In some embodiments, the system further comprises:
the GPS power divider is connected with the GPS signal simulator and used for distributing signals generated by the GPS signal simulator to at least two GPS modules of the next stage for use, wherein the GPS modules comprise the external GPS module and the internal GPS module of the second V2X device.
In some embodiments, the GPS baseband synchronization information includes at least a 1PPS second pulse synchronization signal and { time, positioning information }, the 1PPS second pulse synchronization signal and the { time, positioning information } being sent to the first V2X device; and
and the internal GPS module of the second V2X equipment receives the GPS baseband synchronous information sent by the GPS signal simulator and analyzes the GPS baseband synchronous information to obtain the 1PPS second pulse synchronous signal and the { time and positioning information }.
In some embodiments, the system further comprises:
a third V2X device configured to receive the 1PPS second pulse synchronization signal and the { time, positioning information } simultaneously with the first V2X device;
and/or the number of the groups of groups,
a fourth V2X device configured to receive the 1PPS second pulse synchronization signal and the { time, positioning information } simultaneously with the first V2X device;
wherein the GPS baseband synchronization information in the third V2X device and the fourth V2X device is simulated by the GPS signal simulator and transmitted through the multiple output ports of the GPS power divider.
In some embodiments, the first V2X device includes a main controller, a first switch, and a second switch,
and the first switch is controlled to switch serial data through the main controller, and the second switch is controlled to switch 1PPS second pulse signals.
In some embodiments, further comprising:
when the first V2X device is tested, the first switch and the second switch are controlled to be respectively cut to a communication interface of the external GPS module through the test instruction generated by the main controller of the first V2X device so as to receive serial data and 1PPS second pulse signals generated by the outside;
when the first V2X device works normally, the first switch and the second switch are controlled by the main controller of the first V2X device to be switched to the communication interface of the internal GPS module, so as to receive serial data and 1PPS second pulse signals generated internally.
In some embodiments, the first V2X device main controller controls the switching paths of the first Switch and the second Switch through a signal switch_en pin.
In some embodiments, the external GPS module remains powered and continues to provide the GPS baseband synchronization information to the first V2X device when tested with serial data generated by the external GPS module and a 1PPS second pulse signal.
In some embodiments, the second V2X device maintains V2X communication with the first V2X device through respective antennas.
In a second aspect, an embodiment of the present application further provides a testing method of a V2X device, which is applied to the testing system described in the first aspect, where the testing method includes:
powering up the GPS signal simulator, the first V2X device and the second V2X device;
during testing, responding to the GPS signals simulated in the GPS signal simulator, and switching an internal GPS module connected with a main controller in the first V2X device into the external GPS module according to a test instruction;
and after the test is finished, switching the external GPS module connected with the main controller in the first V2X device into the internal GPS module.
The above-mentioned at least one technical scheme that this application embodiment adopted can reach following beneficial effect: and simulating a GPS signal by adopting a GPS signal simulator, generating the GPS signal through continuous operation, receiving the GPS signal in the GPS signal simulator by an external GPS module, and demodulating the GPS signal into GPS baseband synchronous information. By adopting an external GPS module which continuously works, an internal switching mechanism and a related circuit of V2X equipment are matched, and the GPS baseband synchronous information sent by the external GPS module is received by first V2X equipment to carry out testing. Meanwhile, the second V2X equipment is matched as auxiliary test equipment to perform V2X communication, so that the communication and performance quality of the V2X equipment to be tested are ensured.
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 embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a schematic view of a V2X device in the related art;
FIG. 2 is a schematic diagram of a test circuit of a V2X device according to the related art;
FIG. 3 (a) is a schematic structural diagram of a test system of a V2X device according to an embodiment of the present application;
FIG. 3 (b) is a schematic structural diagram of a test system of a V2X apparatus according to a preferred embodiment of the present application;
FIG. 4 is a schematic circuit diagram of a testing system of a V2X device according to an embodiment of the present application;
fig. 5 is a schematic circuit diagram of a test system of the V2X device according to a preferred embodiment of the present application.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
The embodiment of the application provides a test system 300 of a V2X device, as shown in fig. 3 (a) and fig. 3 (b), and provides a schematic circuit structure diagram of the test system of the V2X device in the embodiment of the application, where the system includes a GPS signal simulator 310 for simulating a GPS signal; an external GPS module 320, configured to receive the GPS signal in the GPS signal simulator and demodulate the GPS signal into GPS baseband synchronization information, where the external GPS module continuously operates during a test process; the first V2X device 330 is configured to receive the GPS baseband synchronization information sent by the external GPS module, where the first V2X device switches an internal GPS module connected to a main controller of the first V2X device to the external GPS module according to a test instruction; a second V2X device 340 for maintaining a communication connection with the first V2X device and acting as an auxiliary test device.
The GPS analog signal in the GPS signal simulator 310 is directly generated by the GPS signal simulator, so that the indoor GPS signal quality can be guaranteed, the influence of external weather and other factors is avoided, and the output power is adjustable and controllable.
The external GPS module 320 may be used to receive the GPS signals in the GPS signal simulator and demodulate the GPS signals into GPS baseband synchronization information. It should be noted that the external GPS module is continuously operating during the test process, so that the GPS signal can be continuously demodulated. The GPS signal is then input into the first V2X device 330.
The first V2X device 330 has an internal GPS module in itself, but does not use the internal GPS module in the test, but chooses to receive GPS baseband synchronization information provided by an external GPS module. That is, the device under test does not employ the internal GPS module signal, but rather employs the demodulated data provided by the external GPS module. This overcomes the problem of testing being affected by the quality of the external GPS signal.
In the related art, the V2X device factory test time is long because it depends on the 1PPS and the time position provided by the internal GPS module, and the GPS module usually takes 30s to synchronize the satellite signal. In the embodiment of the application, the GPS signal simulator is adopted and can be divided into a plurality of identical satellite signals to be sent to a plurality of external GPS modules, so that the synchronization of the information analyzed by each GPS module in the V2X equipment or the synchronization of the GPS baseband synchronization information demodulated in the external GPS module can be ensured, and then the information is provided for the V2X equipment to be tested.
It should be noted that the first V2X device 330 directly receives the GPS baseband synchronization information sent by the external GPS module, and does not use an internal GPS module. For the first V2X device, an internal GPS module connected to the V2X device's main controller may be switched to the external GPS module according to a test instruction (which may be generated by the V2X device main controller).
The second V2X device 340 is communicatively coupled to the first V2X device 330 and acts as an auxiliary test device. It should be noted that the second V2X device 340 may also synchronously receive the GPS signals simulated in the GPS signal simulator through a built-in GPS module.
In the embodiment of the present application, the first V2X device 330 is first used to receive the GPS baseband synchronization information sent by the external GPS module, so as to reduce interference caused by external GPS signals. And secondly, the first V2X device 330 can also be used as a normal V2X device to implement V2X communication by using its internal GPS module. Finally, in the first V2X device 330, the used GPS module is switched by generating a test instruction, so as to be applicable to different use scenarios.
The method is different from the problem that in the related art, when the factory production test is carried out, the power-on synchronization time of the V2X equipment is long or the synchronization between the V2X equipment cannot be established due to the fact that the GPS signal in the factory is weaker and the equipment is not locked for synchronization when a GPS signal enhancer or a GPS signal simulator scheme is adopted. In this application, the GPS signal simulator 310 directly generates a GPS signal, so that the indoor GPS signal quality is guaranteed to be better, the influence of external weather and other factors is avoided, and the output power is adjustable and controllable. And the GPS signal can be continuously generated and output only after power-on in the test process. In addition, the problem that the GPS signal enhancer or the GPS signal simulator needs to be powered on repeatedly to delay the test time is also solved.
The external GPS module 320 may be used to receive the GPS signals in the GPS signal simulator and demodulate the GPS signals into GPS baseband synchronization information. Meanwhile, the external GPS module also continuously works in the test process, so that GPS signals can be continuously demodulated. The GPS signal is then input into the first V2X device 330. Not only can the device power-up synchronization time be reduced, but the first V2X device 330 can also establish V2X communication with other V2X devices (second V2X device 340) for synchronization.
That is, in the related art, if the V2X device cannot communicate when receiving the GPS signal, it is difficult to ensure the communication and performance quality of the V2X device to be tested. In the related art, the V2X device cannot perform fast synchronization after power-up, resulting in a long test time. In contrast, in the embodiment of the present application, the GPS signal simulator capable of continuously working simulates the GPS signal and the external GPS module continuously working directly transmits the 1pps second pulse signal and the synchronization signal of { time and location information } to the V2X device to be tested after real-time analysis. In the embodiment of the application, the V2X device can be in V2X communication connection with the V2X device to be tested through the auxiliary test, and the GPS signal simulator continuously receives the GPS signals continuously. Therefore, the V2X equipment to be tested and the auxiliary test V2X equipment both receive homologous signals, and normal communication between the equipment to be tested and the auxiliary equipment is ensured.
In one embodiment of the present application, the system further comprises: the GPS power divider is connected with the GPS signal simulator and used for distributing signals generated by the GPS signal simulator to at least two GPS modules of the next stage for use, wherein the GPS modules comprise the external GPS module and the internal GPS module of the second V2X device.
The GPS signals generated by the GPS simulator are equally divided into two GPS modules at the later stage for use, and because the V2X equipment to be tested and the auxiliary test equipment are required to be communicated, real GPS satellite signals or homologous GPS analog signals are required to be adopted, and the power divider can just meet the requirements of the homologous GPS signals and ensure normal communication between the equipment to be tested and the auxiliary equipment.
Referring to fig. 4, in the implementation, in order to ensure the homology of signal sources, the GPS power divider is additionally provided, and the GPS power divider is connected with the GPS signal simulator, so that signals generated by the GPS signal simulator are distributed to at least two GPS modules of a next stage for use.
It should be noted that the next-stage GPS module refers to a GPS module connected to a GPS power divider (the GPS signal source is one stage), and includes an external GPS module 320 and an internal GPS module in the second V2X device 340, which are two next-stage GPS modules. I.e. the GPS module comprises the external GPS module, an internal GPS module of the second V2X device.
The GPS module is characterized in that: the external GPS module receives signals generated by the GPS signal simulator received via the GPS power divider, and the internal GPS module of the second V2X device also receives signals generated by the GPS signal simulator received via the GPS power divider. The GPS module is characterized in that: the external GPS module is directly sent to the main controller of the first V2X device (no parsing is performed inside) and no parsing is required. And the internal GPS module of the second V2X equipment analyzes the internal part or directly transmits the external GPS module, and then transmits the external GPS module to the main controller of the second V2X equipment.
In one embodiment of the present application, the GPS baseband synchronization information includes at least a 1PPS second pulse synchronization signal and { time, positioning information }, where the 1PPS second pulse synchronization signal and { time, positioning information } are sent to the first V2X device; and the internal GPS module of the second V2X device receives the GPS baseband synchronous information sent by the GPS signal simulator and analyzes the GPS baseband synchronous information to obtain the 1PPS second pulse synchronous signal and the { time and positioning information }.
After the GPS module analyzes, the GPS baseband synchronous information carries 1PPS second pulse synchronous signals and { time and positioning information }. And sending the 1PPS second pulse synchronous signal obtained by analysis of an external GPS module and the { time and positioning information } to the first V2X device.
Further, the 1PPS second pulse synchronization signal and { time, positioning information } are received by the internal GPS module of the second V2X device and parsed in the device to obtain the 1PPS second pulse synchronization signal and { time, positioning information }.
In one embodiment of the present application, the system further comprises: a third V2X device configured to receive the 1PPS second pulse synchronization signal and the { time, positioning information } simultaneously with the first V2X device; and/or a fourth V2X device configured to receive the 1PPS second pulse synchronization signal and the { time, positioning information } simultaneously with the first V2X device; wherein the GPS baseband synchronization information in the third V2X device and the fourth V2X device is simulated by the GPS signal simulator and transmitted through the multiple output ports of the GPS power divider.
The "third V2X device" and the "fourth V2X device" can be used as an optimized solution, i.e. the second V2X device is likewise used as an auxiliary test device. And adding a third V2X device and a fourth V2X device together with the first V2X device as a V2X device to be tested.
In one embodiment of the present application, the second V2X device is configured to synchronously receive a 1PPS second pulse synchronization signal and { time, positioning information } in the GPS baseband synchronization information sent by the external GPS module.
It will be appreciated that for the "second V2X device" and "first V2X device" the same type of V2X device may be used, and if the same type of V2X device is used, the corresponding switches and control logic on the master controller may need to be added.
In order to ensure the efficiency during the test, a GPS power divider with multiple output ports is adopted, and GPS baseband synchronous information is simulated by the GPS signal simulator and transmitted through the multiple output ports of the GPS power divider, so that a plurality of test devices can be externally connected to perform communication test simultaneously. The same hardware scheme as the device to be tested can be adopted in the selection of the auxiliary test device, and an external GPS module is also adopted to provide a synchronous signal, as shown in fig. 5, (a hardware switch and switching logic of a main controller are required to be added).
In one embodiment of the present application, the first V2X device includes a main controller, a first switch, and a second switch, where the first switch is controlled by the main controller to switch serial data and the second switch is controlled by the second switch to switch 1PPS second pulse signals.
Referring to fig. 5, the V2X device to be tested does not use the internal GPS module signal, but uses the demodulated data provided by the external GPS module. Therefore, two Switch chips are added on the PCB main board of the V2X device to be tested, and are respectively used for 1PPS second pulse signal switching and serial port data switching, and a main control CPU (main controller) controls the switching directions of the two switches through a signal switch_EN.
In one embodiment of the present application, further comprising: when the first V2X device is tested, the first switch and the second switch are controlled to be respectively cut to a communication interface of the external GPS module through the test instruction generated by the main controller of the first V2X device so as to receive serial data and 1PPS second pulse signals generated by the outside; when the first V2X device works normally, the first switch and the second switch are controlled by the main controller of the first V2X device to be switched to the communication interface of the internal GPS module, so as to receive serial data and 1PPS second pulse signals generated internally.
With continued reference to fig. 5, when the V2X device is tested at the factory, the main control CPU controls (main controller) the two switches to switch to the external GPS module circuit, and uses the synchronization signal provided by the external GPS module. When the V2X equipment works normally, the main control CPU controls the two switches to be switched to the internal GPS module, and synchronous signals provided by the external GPS module are adopted.
In contrast to the related art, the GPS module needs more than about 20s from power-up to synchronization, so that the V2X device on the production line needs at least half a minute to start up to successfully perform the communication test. In the embodiment of the application, the external GPS module is adopted when the V2X equipment to be tested is tested, so that the test time can be greatly shortened. Therefore, when the external GPS module is adopted for testing, the external GPS module is not required to be powered off, and synchronous signals can be continuously provided for the equipment to be tested, so that the GPS synchronous signals can be immediately obtained for communication testing as soon as the equipment to be tested is powered on.
In one embodiment of the present application, the first V2X device main controller controls the switching paths of the first Switch and the second Switch through a signal switch_en pin.
With continued reference to fig. 4, the switching paths of the two switches are controlled by the first V2X device main controller via the signal switch_en. When switching to one path, the external GPS module is accessed, and when switching to the other path, the internal GPS module in the first V2X device is accessed. The specific path is not limited in this application, and may be selected by those skilled in the art according to the actual circumstances.
In one embodiment of the present application, the external GPS module maintains power and continuously provides the GPS baseband synchronization information to the first V2X device when tested using serial data generated by the external GPS module and a 1PPS second pulse signal.
In order to improve the efficiency of the factory test V2X equipment, a continuously working GPS signal simulator is adopted, the GPS power divider is divided into a plurality of identical satellite signals to be transmitted to a plurality of GPS modules, so that the synchronization of the information analyzed by each GPS module can be ensured, and then the information is provided for the V2X equipment to be tested and the auxiliary test V2X equipment.
In one embodiment of the present application, the second V2X device maintains V2X communication with the first V2X device through respective antennas.
When the V2X equipment to be tested and the auxiliary test equipment are in communication, the V2X communication is kept through the access of the antenna PC 5. During testing, communication is carried out between the V2X antenna and the tested V2X equipment, so that the communication and performance quality of the tested V2X equipment are ensured.
Preferably, a standard V2X device circuit structure may be used to receive the GPS signals synchronized by the GPS signal simulator through the built-in GPS module.
The embodiment of the application also provides a testing method of the V2X device, which is applied to the testing system, wherein the testing method comprises the following steps:
and powering up the GPS signal simulator, the first V2X device and the second V2X device.
The GPS signal simulator continuously outputs the GPS signal after being powered on.
After the first V2X device and the second V2X device are powered on, a test may be performed.
And during testing, responding to the GPS signals simulated in the GPS signal simulator, and switching an internal GPS module connected with the main controller in the first V2X device into the external GPS module according to a test instruction.
The external GPS module can be used for receiving the GPS signals in the GPS signal simulator and demodulating the GPS signals into GPS baseband synchronous information. It should be noted that the external GPS module is continuously operating during the test process, so that the GPS signal can be continuously demodulated. And then inputting a GPS signal into the first V2X device.
The first V2X device is provided with an internal GPS module, but the internal GPS module is not used in the test, and the GPS baseband synchronous information provided by the external GPS module is selectively received. That is, the device under test does not employ the internal GPS module signal, but rather employs the demodulated data provided by the external GPS module. This overcomes the problem of testing being affected by the quality of the external GPS signal.
And after the test is finished, switching the external GPS module connected with the main controller in the first V2X device into the internal GPS module.
The first V2X device comprises a main controller, a first switch and a second switch, wherein serial data are switched through the first switch, and 1PPS second pulse signals are switched through the second switch. When the first V2X device works normally, the first switch and the second switch are controlled by the main controller of the first V2X device to be switched to the communication interface of the internal GPS module, so as to receive serial data and 1PPS second pulse signals generated internally.
In the above test method, the first V2X device is adopted to receive the GPS baseband synchronization information sent by the external GPS module during the test, so as to reduce interference caused by external GPS signals. And secondly, the first V2X equipment can also be used as normal V2X equipment to realize V2X communication by using an internal GPS module. And finally, switching the used GPS module by generating a test instruction in the first V2X device, so that the method is applicable to different use scenes. Furthermore, the GPS signal simulator directly generates GPS signals during testing, so that the indoor GPS signal quality can be guaranteed, the influence of factors such as external weather and the like is avoided, and the output power is adjustable and controllable. And the GPS signal can be continuously generated and output only after power-on in the test process.
And in the testing process, a GPS power divider can be added and connected with the GPS signal simulator, and the GPS power divider is used for distributing signals generated by the GPS signal simulator to at least two GPS modules of the next stage for use, wherein the GPS modules comprise the external GPS module and the internal GPS module of the second V2X device.
In the above test process, a third V2X device may be added, for receiving the 1PPS second pulse synchronization signal and the { time, positioning information } simultaneously with the first V2X device; and/or a fourth V2X device may be added, configured to receive the 1PPS second pulse synchronization signal and the { time, positioning information } simultaneously with the first V2X device; wherein the GPS baseband synchronization information in the third V2X device and the fourth V2X device is simulated by the GPS signal simulator and transmitted through the multiple output ports of the GPS power divider.
In order to ensure the efficiency during the test, a GPS power divider with multiple output ports is adopted, and GPS baseband synchronous information is simulated by the GPS signal simulator and transmitted through the multiple output ports of the GPS power divider, so that a plurality of test devices can be externally connected to perform communication test simultaneously. The auxiliary test equipment can be selected by adopting the same hardware scheme as the equipment to be tested, and simultaneously, an external GPS module is also adopted to provide a synchronous signal.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (7)
1. A test system for a V2X device, wherein the system comprises:
the GPS signal simulator is used for simulating GPS signals, wherein the GPS signal simulator continuously generates and outputs the GPS signals after being powered on in the test process;
the external GPS module is used for receiving the GPS signals in the GPS signal simulator and demodulating the GPS signals into GPS baseband synchronous information, wherein the external GPS module continuously works in the test process;
the first V2X device is used for receiving the GPS baseband synchronization information sent by the external GPS module, wherein the first V2X device switches an internal GPS module connected with a main controller of the first V2X device into the external GPS module according to a test instruction;
the first V2X device comprises a main controller, a first switch and a second switch, wherein the main controller is used for controlling the first switch to switch serial data and the second switch to switch 1PPS second pulse signals;
when the first V2X device is tested, the first switch and the second switch are controlled to be respectively cut to the communication interface of the external GPS module through the test instruction generated by the main controller of the first V2X device so as to receive serial data and 1PPS second pulse signals generated by the external GPS module;
when the first V2X equipment works normally, the first switch and the second switch are controlled by the main controller of the first V2X equipment to be switched to a communication interface of the internal GPS module so as to receive serial port data and 1PPS second pulse signals generated by the internal GPS module;
the system further comprises:
the GPS power divider is connected with the GPS signal simulator and used for distributing signals generated by the GPS signal simulator to at least two GPS modules of the next stage for use, wherein the GPS modules comprise the external GPS module and an internal GPS module of the second V2X device so as to enable normal communication between the first V2X device and the second V2X device;
and the second V2X device is used for being in communication connection with the first V2X device and used as auxiliary test equipment.
2. The system of claim 1, wherein the GPS baseband synchronization information comprises at least a 1PPS second pulse synchronization signal and time, positioning information, the 1PPS second pulse synchronization signal and the time, positioning information being sent to the first V2X device; and
and the internal GPS module of the second V2X equipment receives the GPS baseband synchronous information sent by the GPS signal simulator and analyzes the GPS baseband synchronous information to obtain the 1PPS second pulse synchronous signal, the time and the positioning information.
3. The system of claim 2, wherein the system further comprises:
the third V2X device is used for receiving the 1PPS second pulse synchronous signal and the time and positioning information simultaneously with the first V2X device;
and/or the number of the groups of groups,
a fourth V2X device, configured to receive the 1PPS second pulse synchronization signal and the time and positioning information simultaneously with the first V2X device;
wherein the GPS baseband synchronization information in the third V2X device and the fourth V2X device is simulated by the GPS signal simulator and transmitted through the multiple output ports of the GPS power divider.
4. The system of claim 1, wherein the first V2X device master controller controls the switching paths of the first Switch and the second Switch through a signal switch_en pin.
5. The system of claim 4, wherein the external GPS module remains powered and continues to provide the GPS baseband synchronization information to the first V2X device when tested with serial data generated by the external GPS module and a 1PPS second pulse signal.
6. The system of claim 1, wherein the second V2X device is configured to synchronously receive a 1PPS second pulse synchronization signal and time and positioning information in the GPS baseband synchronization information sent by the external GPS module.
7. A test method of a V2X device applied to the test system according to any one of claims 1 to 6, wherein the test method comprises:
powering up the GPS signal simulator, the first V2X device and the second V2X device;
during testing, responding to the GPS signals simulated in the GPS signal simulator, and switching an internal GPS module connected with a main controller in the first V2X device into an external GPS module according to a test instruction;
and after the test is finished, switching the external GPS module connected with the main controller in the first V2X device into the internal GPS module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310251969.5A CN115987845B (en) | 2023-03-16 | 2023-03-16 | V2X equipment testing system and method |
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| CN116528195B (en) * | 2023-07-05 | 2023-09-19 | 智道网联科技(北京)有限公司 | V2X device for automatic driving system and signal switching method |
| CN117572809B (en) * | 2024-01-15 | 2024-04-16 | 智道网联科技(北京)有限公司 | OBU equipment and control method |
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