Automobile communication performance evaluation device in complex electromagnetic environment

Abstract

The utility model discloses an automobile communication performance evaluation device in a complex electromagnetic environment, which comprises a microwave anechoic chamber, a rotary table used for placing a tested automobile is arranged in the microwave anechoic chamber, and a first test antenna and a second test antenna which are used for transmitting test signals are respectively arranged in the microwave anechoic chamber and positioned on the side edge of the rotary table. Wherein the first test antenna and the second test antenna are respectively connected with an electromagnetic compatibility test unit and an Internet of Vehicles communication test unit outside the microwave anechoic chamber through test signal lines. According to the utility model, through the combination of the microwave darkroom, the rotary table, the test antenna, the electromagnetic compatibility test unit and the Internet of Vehicles communication test unit, an anti-interference test and a communication test can be carried out on a tested automobile, so that the communication performance of the tested automobile in a complex electromagnetic environment is evaluated.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic compatibility testing, in particular to a vehicle communication performance evaluation device in a complex electromagnetic environment. Background Art

[0002] With the development of automobile electrification, intelligence, and the Internet, as well as the increasing application of on-board wireless communication system technology, the compatibility between electric vehicles and complex electromagnetic environments will become an important trend in the electromagnetic compatibility testing and evaluation of electric vehicles in the future. This testing and evaluation technology requires close cooperation between the automotive industry and electromagnetic compatibility testing and evaluation organizations to jointly study the effects of the external electromagnetic environment on the electromagnetic compatibility of in-vehicle and out-of-vehicle systems and solve the problems.

[0003] With the development of electric, intelligent and internet-based vehicles, as well as the increasing application of in-vehicle wireless communication system technology, the compatibility issue between electric vehicles and complex electromagnetic environments has become increasingly prominent.

[0004] There are a large number of electromagnetic radiation sources in complex electromagnetic environments, such as wireless communication equipment, radar systems, high-voltage transmission lines, etc. At the same time, electric vehicles themselves are also a source of electromagnetic radiation, and their motors, charging systems, communication systems and other equipment will generate electromagnetic radiation.

[0005] Electromagnetic radiation sources interfere with the electronic systems and communication systems of electric vehicles, which can easily lead to a decrease in the communication quality and performance of electric vehicles and other wireless devices, and then cause failures. In order to solve this problem and ensure the normal operation of electric vehicles and good coordination with other systems, a vehicle communication performance evaluation device in a complex electromagnetic environment is proposed. Utility Model Content

[0006] The utility model aims to provide a vehicle communication performance evaluation device in a complex electromagnetic environment to solve the compatibility problem between electric vehicles and complex electromagnetic environments proposed in the above background technology.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a device for evaluating automobile communication performance in a complex electromagnetic environment, comprising a microwave darkroom,

[0008] The microwave darkroom is provided with a turntable for placing the tested car.

[0009] The microwave darkroom is provided with a first test antenna and a second test antenna for transmitting a test signal on the sides of the turntable.

[0010] The first test antenna and the second test antenna are connected to an electromagnetic compatibility test unit and a vehicle networking communication test unit located outside the microwave darkroom through test signal lines, respectively.

[0011] The electromagnetic compatibility test unit performs an electromagnetic compatibility anti-interference test on the vehicle under test through a first test antenna;

[0012] The Internet of Vehicles communication test unit performs an Internet of Vehicles communication test on the vehicle under test through the second test antenna.

[0013] Preferably, the electromagnetic compatibility test unit includes a signal generating component and a power amplifying component, the signal generating component is used to transmit the electromagnetic signal of the environment in which the tested vehicle is located, and the power amplifying component is used to amplify the signal power generated by the signal generating component, so that the tested vehicle is in a high field strength environment and the vehicle is subjected to EMS testing.

[0014] Preferably, the Internet of Vehicles communication test unit includes a signal source, a comprehensive tester and a combiner for simulating GNSS signals, and the signal source and the comprehensive tester are both connected to the combiner.

[0015] The combiner is used to combine the test signal provided by the signal source and the comprehensive tester, and output it to the second test antenna through the test signal line.

[0016] Preferably, the electromagnetic compatibility test unit and the vehicle networking communication test unit are independent of each other, and the working frequency band of the electromagnetic compatibility test unit for transmitting interference signals is 0.1-3000MHz; the working frequency band of the vehicle networking communication test unit is 5905-5925MHz.

[0017] Preferably, the Internet of Vehicles communication test unit performs Internet of Vehicles communication test on the tested vehicle through the second test antenna, including E-call and C-VX communication test on the tested vehicle.

[0018] Preferably, the turntable carries the vehicle under test and rotates in the microwave darkroom, so as to receive the test signals emitted by the first test antenna and the second test antenna at multiple angles of the entire vehicle under test.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model can perform anti-interference test and communication test on the tested vehicle through the combination of a microwave darkroom, a turntable, a test antenna, an electromagnetic compatibility test unit and a vehicle networking communication test unit, so as to evaluate its communication performance in a complex electromagnetic environment.

[0021] At the same time, the electromagnetic compatibility test unit and the Internet of Vehicles communication test unit are independent of each other and have different operating frequency bands, which can more comprehensively evaluate the compatibility between electric vehicles and complex electromagnetic environments.

[0022] In addition, the Internet of Vehicles communication test unit can also simulate GNSS signals and conduct E-call and C-V2X communications with the vehicle under test. As the EMS interference signal strengthens, the E-call and C-V2X communication status can be monitored in real time to determine the working status of the vehicle communication system under different field strengths, such as normal communication, degraded communication performance, inability to communicate, and equipment damage. This allows the vehicle's communication performance to be evaluated in a complex electromagnetic environment, which can more realistically simulate actual usage scenarios and improve the accuracy of test results.

[0023] The vehicle communication performance evaluation device in a complex electromagnetic environment provided by the utility model can provide important technical support for the electromagnetic compatibility test and evaluation of electric vehicles, and provides an effective means for the automotive industry and electromagnetic compatibility test and evaluation institutions to jointly study the electromagnetic compatibility issues of the external electromagnetic environment on the in-vehicle and out-of-vehicle systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0025] In the figure: 1. Microwave darkroom; 2. Turntable; 3. First test antenna; 4. Second test antenna; 5. Electromagnetic compatibility test unit; 6. Internet of Vehicles communication test unit; 601. Signal source; 602. Comprehensive tester; 603. Combiner; 7. Test signal line; 8. Vehicle under test. DETAILED DESCRIPTION

[0026] In order to facilitate the solution of the compatibility problem between electric vehicles and complex electromagnetic environments, the embodiment of the utility model provides a vehicle communication performance evaluation device in a complex electromagnetic environment. The technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] See also Figure 1 The utility model provides a vehicle communication performance evaluation device in a complex electromagnetic environment, comprising a microwave darkroom 1,

[0028] A turntable 2 for placing the tested vehicle 8 is provided in the microwave darkroom 1. The turntable 2 carries the tested vehicle 8 to rotate in the microwave darkroom 1, and is used for the tested vehicle 8 to receive the test signals emitted by the first test antenna 3 and the second test antenna 4 at multiple angles.

[0029] A first test antenna 3 and a second test antenna 4 for transmitting a test signal are respectively arranged on the side of the turntable 2 in the microwave darkroom 1.

[0030] The first test antenna 3 and the second test antenna 4 are connected to the electromagnetic compatibility test unit 5 and the vehicle networking communication test unit 6 outside the microwave darkroom 1 through the test signal line 7, respectively.

[0031] The electromagnetic compatibility test unit 5 performs an electromagnetic compatibility immunity test on the tested vehicle 8 through the first test antenna 3; the electromagnetic compatibility test unit 5 includes a signal generating component and a power amplifying component, the signal generating component is used to transmit the electromagnetic signal of the environment in which the tested vehicle 8 is located, and the power amplifying component is used to amplify the signal power generated by the signal generating component, so that the tested vehicle 8 is in a high field strength environment and performs an EMS test on the vehicle.

[0032] The Internet of Vehicles communication test unit 6 performs an Internet of Vehicles communication test on the tested vehicle 8 through the second test antenna 4. The Internet of Vehicles communication test unit 6 includes a signal source 601 for simulating GNSS signals, a comprehensive tester 602 and a combiner 603. The signal source 601 and the comprehensive tester 602 are both connected to the combiner 603. The combiner 603 is used to synthesize the test signals provided by the signal source 601 and the comprehensive tester 602, and output them to the second test antenna 4 through the test signal line 7. The Internet of Vehicles communication test unit 6 performs an Internet of Vehicles communication test on the tested vehicle 8 through the second test antenna 4, including E-call and C-V2X communication tests on the tested vehicle 8.

[0033] The electromagnetic compatibility test unit 5 and the vehicle networking communication test unit 6 are independent of each other, and the electromagnetic compatibility test unit 5 transmits interference signals in a working frequency band of 0.1-3000MHz; the vehicle networking communication test unit 6 operates in a frequency band of 5905-5925MHz.

[0034] The working principle of the automobile communication performance evaluation device in a complex electromagnetic environment provided by the utility model is as follows: during the test, the vehicle network communication test unit 6 performs E-call and C-VX communication with the tested vehicle 8 through the second test antenna 4; when the E-call and C-VX communications are normal, the electromagnetic compatibility test unit 5 performs EMS interference immunity test on the tested vehicle 8 through the first test antenna 3; the tested vehicle 8 is placed on a turntable 2, and the tested vehicle 8 rotates with the turntable 2 during the test.

[0035] The EMS interference field strength gradually increases. As the EMS interference field strength increases, the user monitors the 8C-VX and E-Call communication performance of the tested vehicle in real time to determine the working status of the tested vehicle's 8 communication system under different field strengths, such as normal communication, reduced communication performance, inability to communicate, and equipment damage, thereby realizing the communication performance evaluation of the vehicle in a complex electromagnetic environment.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle communication performance evaluation device in a complex electromagnetic environment, characterized by: It includes a microwave darkroom (1), The microwave darkroom (1) is provided with a turntable (2) for placing the vehicle (8) to be tested. The microwave darkroom (1) is provided with a first test antenna (3) and a second test antenna (4) for transmitting a test signal, respectively, on the sides of the turntable (2). The first test antenna (3) and the second test antenna (4) are respectively connected to an electromagnetic compatibility test unit (5) and a vehicle networking communication test unit (6) located outside the microwave darkroom (1) via a test signal line (7). The electromagnetic compatibility test unit (5) performs an electromagnetic compatibility anti-interference test on the vehicle under test (8) via the first test antenna (3); The Internet of Vehicles communication test unit (6) performs an Internet of Vehicles communication test on the tested vehicle (8) via the second test antenna (4).

2. The vehicle communication performance evaluation device in a complex electromagnetic environment according to claim 1, characterized in that: The electromagnetic compatibility test unit (5) comprises a signal generating component and a power amplifying component, wherein the signal generating component is used to transmit an electromagnetic signal of the environment in which the tested vehicle (8) is located, and the power amplifying component is used to amplify the signal power generated by the signal generating component, so that the tested vehicle (8) is placed in a high field strength environment and an EMS test is performed on the vehicle.

3. The vehicle communication performance evaluation device in a complex electromagnetic environment according to claim 1, characterized in that: The Internet of Vehicles communication test unit (6) comprises a signal source (601) for simulating GNSS signals, a comprehensive tester (602) and a combiner (603), wherein the signal source (601) and the comprehensive tester (602) are both connected to the combiner (603). The combiner (603) is used to combine the test signals provided by the signal source (601) and the comprehensive tester (602), and output the combined signals to the second test antenna (4) via the test signal line (7).

4. The vehicle communication performance evaluation device in a complex electromagnetic environment according to claim 1, characterized in that: The electromagnetic compatibility test unit (5) and the vehicle networking communication test unit (6) are independent of each other, and the electromagnetic compatibility test unit (5) emits interference signals in a working frequency band of 0.1-3000 MHz; the vehicle networking communication test unit (6) has a working frequency band of 5905-5925 MHz.

5. The vehicle communication performance evaluation device in a complex electromagnetic environment according to claim 4, characterized in that: The Internet of Vehicles communication test unit (6) performs an Internet of Vehicles communication test on the tested vehicle (8) via the second test antenna (4), including an E-call and C-V2X communication test on the tested vehicle (8).

6. The vehicle communication performance evaluation device in a complex electromagnetic environment according to claim 1, characterized in that: The turntable (2) carries the vehicle under test (8) and rotates in the microwave darkroom (1), and is used for the vehicle under test (8) to receive test signals emitted by the first test antenna (3) and the second test antenna (4) at multiple angles.

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