Electromagnetic compatibility test method and equipment

Abstract

The present application discloses an electromagnetic compatibility testing method and equipment, and the equipment includes an electromagnetic compatibility testing system and a computer-readable storage medium. The electromagnetic compatibility testing method includes: controlling a signal source to output a preset radio frequency signal to a device under test through a transmitting antenna; obtaining the signal-to-noise ratio when the device under test receives the preset radio frequency signal, and determining whether the signal-to-noise ratio is the same as the preset signal-to-noise ratio; in response to the signal-to-noise ratio being different from the preset signal-to-noise ratio, adjusting the signal source or the transmitting antenna; in response to the signal-to-noise ratio being the same as the preset signal-to-noise ratio, starting to perform an electromagnetic compatibility test on the device under test. In the above manner, the electromagnetic compatibility testing method of the present application can ensure the consistency of each electromagnetic compatibility test without increasing the cost, thereby improving the reference value of each electromagnetic compatibility test.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic compatibility testing, and in particular to an electromagnetic compatibility testing method and equipment thereof, wherein the equipment comprises an electromagnetic compatibility testing system and a computer-readable storage medium. Background Art

[0002] In the field of electromagnetic compatibility (EMC) testing technology, the basic requirements for electromagnetic compatibility testing are that the test is repeatable and consistent to ensure that the test results are credible. During the test, not only the test site parameters are required to be consistent, but also the parameters of various indicators of the auxiliary equipment must be consistent. However, when actually conducting electromagnetic compatibility testing on the device under test, due to factors such as differences in test sites, differences in personnel operations, aging of antenna harnesses, and signal reflections caused by peripheral equipment, it is impossible to completely guarantee that the signal strength received by the device under test is a fixed value during each electromagnetic compatibility test, thereby increasing the uncertainty of the electromagnetic compatibility test and reducing the credibility of the results of the electromagnetic compatibility test. Summary of the invention

[0003] In order to solve the above problems, the present application proposes an electromagnetic compatibility testing method and device thereof, the device comprising an electromagnetic compatibility testing system and a computer-readable storage medium to solve the above problems.

[0004] To solve the above technical problems, a technical solution adopted in the present application is: to provide an electromagnetic compatibility testing method, which includes: controlling a signal source to output a preset radio frequency signal to a device under test through a transmitting antenna; obtaining a signal-to-noise ratio when the device under test receives the preset radio frequency signal, and determining whether the signal-to-noise ratio is the same as the preset signal-to-noise ratio; in response to the signal-to-noise ratio being different from the preset signal-to-noise ratio, adjusting the signal source or the transmitting antenna; in response to the signal-to-noise ratio being the same as the preset signal-to-noise ratio, starting to perform an electromagnetic compatibility test on the device under test.

[0005] The step of obtaining the signal-to-noise ratio when the device under test receives a preset radio frequency signal includes: obtaining message information parsed when the device under test receives the preset radio frequency signal; and obtaining the signal-to-noise ratio based on the message information.

[0006] The step of obtaining the signal carrier-to-noise ratio based on the message information includes: analyzing the message information to obtain information on the number of visible satellites; and obtaining the signal carrier-to-noise ratio based on the carrier-to-noise ratio information in the information on the number of visible satellites.

[0007] The step of adjusting the signal source or the transmitting antenna includes: adjusting the output power value of the signal source or adjusting the position of the transmitting antenna.

[0008] Among them, before the step of obtaining the signal-to-noise ratio when the device under test receives a preset radio frequency signal, and after the step of controlling the signal source to output the preset radio frequency signal to the device under test through the transmitting antenna, the testing method further includes: determining whether the device under test is successfully positioned after receiving the preset radio frequency signal; in response to the device under test being successfully positioned, executing the step of obtaining the signal-to-noise ratio when the device under test receives the preset radio frequency signal; in response to the device under test being unsuccessfully positioned, returning to executing the step of controlling the signal source to output the preset radio frequency signal to the device under test through the transmitting antenna.

[0009] Among them, the preset signal-to-noise ratio is set to 38-42dB-Hz.

[0010] To solve the above technical problems, another technical solution adopted in the present application is: to provide an electromagnetic compatibility testing system, which includes: a signal source, a transmitting antenna, a control device, a device under test, a receiving antenna and a supporting assembly; wherein the signal source transmits a preset radio frequency signal through the transmitting antenna; the control device and the device under test are both arranged on the supporting assembly; the device under test is connected to the receiving antenna, and the receiving antenna is used to receive the preset radio frequency signal and transmit it to the device under test; the control device is connected to the device under test, and is used to execute any one of the above electromagnetic compatibility testing methods.

[0011] The test system also includes a darkroom, in which the device under test, supporting components, transmitting antenna and receiving antenna are arranged; and the control device and signal source are arranged outside the darkroom.

[0012] The test system also includes a power filter module, which is connected to the device under test and is used to isolate radio wave interference, provide stable test impedance, and supply power to the device under test.

[0013] In order to solve the above technical problems, another technical solution adopted by the present application is: providing a computer-readable storage medium, which stores program instructions therein, and the program instructions are executed by a processor to implement any of the above electromagnetic compatibility testing methods.

[0014] The beneficial effects of the present application are: different from the prior art, the electromagnetic compatibility test method of the present application includes: controlling the signal source to output a preset radio frequency signal to the device under test through the transmitting antenna; obtaining the signal-to-noise ratio when the device under test receives the preset radio frequency signal, and judging whether the signal-to-noise ratio is the same as the preset signal-to-noise ratio; in response to the signal-to-noise ratio being different from the preset signal-to-noise ratio, adjusting the signal source or the transmitting antenna; in response to the signal-to-noise ratio being the same as the preset signal-to-noise ratio, starting the electromagnetic compatibility test of the device under test. In the above manner, the electromagnetic compatibility test method of the present application can ensure the consistency of each electromagnetic compatibility test without increasing the cost, thereby improving the reference value of each electromagnetic compatibility test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0016] Figure 1 It is a flowchart of a first embodiment of a method for testing electromagnetic compatibility provided by the present application;

[0017] Figure 2 yes Figure 1 A flow chart of an embodiment of step S102;

[0018] Figure 3 yes Figure 2 A flow chart of an embodiment of step S202;

[0019] Figure 4 It is a flow chart of a second embodiment of the electromagnetic compatibility testing method provided by the present application;

[0020] Figure 5 It is a structural schematic diagram of an embodiment of an electromagnetic compatibility testing system provided by the present application;

[0021] Figure 6 It is a structural schematic diagram of an embodiment of a computer-readable storage medium provided by the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] In the field of electromagnetic compatibility (EMC) testing technology, the basic requirements for electromagnetic compatibility testing are that the test is repeatable and consistent to ensure that the test results are credible. During the test, not only the test site parameters are required to be consistent, but also the parameters of various indicators of the auxiliary equipment must be consistent. However, when actually conducting electromagnetic compatibility testing on the device under test, due to factors such as differences in test sites, differences in personnel operations, aging of antenna harnesses, and signal reflections caused by peripheral equipment, it is impossible to completely guarantee that the signal strength received by the device under test is a fixed value during each electromagnetic compatibility test, thereby increasing the uncertainty of the electromagnetic compatibility test and reducing the credibility of the results of the electromagnetic compatibility test.

[0024] Exemplarily, the device under test takes the vehicle-mounted Global Navigation Satellite System (GNSS) module as an example, wherein the vehicle-mounted GNSS module is an important module of the vehicle-mounted system, which can provide a reliable source of positioning, navigation and ranging data for the vehicle's assisted driving and remote positioning, and can also provide positioning services for applications such as vehicle anti-theft and emergency rescue, and has become an indispensable part of the vehicle-mounted system. The vehicle-mounted electromagnetic environment is complex. In addition to the electromagnetic radiation generated by itself, it must also withstand the influence of various electromagnetic interferences from the outside world. Once the function of the vehicle-mounted GNSS module is affected, it will affect the vehicle driving. Therefore, in order to evaluate the amount of electromagnetic interference emission to the outside during the actual operation of the vehicle-mounted GNSS module, as well as its own anti-interference ability, it is necessary to conduct an electromagnetic compatibility test on it. As mentioned above, the electromagnetic compatibility test needs to ensure that the environment of each test is consistent, including site parameters, auxiliary equipment models, auxiliary equipment parameters, equipment layout, etc. In the prior art, testers arrange the device under test and other equipment according to the test plan, and then set the signal source to output a fixed-power RF signal. After the function of the device under test is adjusted, the electromagnetic compatibility test begins, and the status of the device under test is monitored in real time through the host computer. When conducting the test, the tester can only judge the consistency of the electromagnetic compatibility test based on the two dimensions of equipment layout and signal source output signal power. However, for the electromagnetic compatibility test of the vehicle-mounted GNSS module, it is also necessary to ensure that the signal source output signal power is a fixed value, and the antenna distance and antenna angle must be kept consistent to ensure the test consistency to the greatest extent. However, factors such as differences in test sites, differences in personnel operations, aging of antenna harnesses, and signal reflections caused by peripheral equipment are difficult to detect and control in a timely manner, and are inevitable and involve uncertainty.

[0025] Therefore, in order to solve the above problems, this application first proposes a test method for electromagnetic compatibility, please refer to Figure 1 , Figure 1FIG. 1 is a flow chart of the first embodiment of the electromagnetic compatibility testing method provided by the present application. Figure 1 As shown, the electromagnetic compatibility testing method of this embodiment specifically includes steps S101 to S104:

[0026] Step S101: controlling a signal source to output a preset radio frequency signal to a device under test via a transmitting antenna.

[0027] In this embodiment, when performing electromagnetic compatibility testing on the device under test, it is first necessary to power on the device under test and various devices such as the signal source, so that each part enters a normal working state, and then control the signal source to output a preset radio frequency signal to the device under test through the transmitting antenna.

[0028] Step S102: obtaining a signal-to-noise ratio when the device under test receives a preset radio frequency signal, and determining whether the signal-to-noise ratio is the same as a preset signal-to-noise ratio.

[0029] When the device under test receives a preset radio frequency signal, this embodiment can obtain the signal-to-noise ratio of the device under test when receiving the preset radio frequency signal through the control device, and determine whether the signal-to-noise ratio is the same as the preset signal-to-noise ratio.

[0030] Among them, the control device in this embodiment can be set as a host computer, and when obtaining the signal-to-noise ratio of the device under test, it can be connected to the device under test through a serial port; in other embodiments, the host computer can also be connected to the device under test through an Ethernet link to obtain the signal-to-noise ratio.

[0031] In this embodiment, the preset signal-to-noise ratio is data obtained by testing in an open environment, and is set to 38-42 dB-Hz in this embodiment.

[0032] If the signal-to-noise ratio is different from the preset signal-to-noise ratio, the process goes to step S103 ; if the signal-to-noise ratio is the same as the preset signal-to-noise ratio, the process goes to step S104 .

[0033] Step S103: Adjust the signal source or the transmitting antenna.

[0034] In this embodiment, when the signal-to-noise ratio is different from the preset signal-to-noise ratio, it means that the parameters of the current electromagnetic compatibility test are inconsistent with those of the previous electromagnetic compatibility test, and the consistency of the test cannot be guaranteed, so the signal source or the transmitting antenna needs to be adjusted.

[0035] Specifically, adjusting the signal source or the transmitting antenna includes: adjusting the output power value of the signal source or adjusting the position of the transmitting antenna. In this embodiment, when the signal-to-noise ratio is different from the preset signal-to-noise ratio, it is necessary to adjust the output power value of the signal source or adjust the position of the transmitting antenna; after the adjustment is completed, step S102 is performed again until the signal-to-noise ratio is the same as the preset signal-to-noise ratio.

[0036] Step S104: Start performing electromagnetic compatibility testing on the device under test.

[0037] When the signal-to-noise ratio is the same as the preset signal-to-noise ratio, it means that the parameters of this electromagnetic compatibility test are consistent with those of the previous electromagnetic compatibility test. At this time, the electromagnetic compatibility test of the device under test can be started.

[0038] Different from the prior art, the electromagnetic compatibility test method of the present application includes: controlling the signal source to output a preset radio frequency signal to the device under test through the transmitting antenna; obtaining the signal-to-noise ratio when the device under test receives the preset radio frequency signal, and determining whether the signal-to-noise ratio is the same as the preset signal-to-noise ratio; in response to the signal-to-noise ratio being different from the preset signal-to-noise ratio, adjusting the signal source or the transmitting antenna; in response to the signal-to-noise ratio being the same as the preset signal-to-noise ratio, starting the electromagnetic compatibility test of the device under test. In the above manner, the electromagnetic compatibility test method of the present application obtains the signal-to-noise ratio received by the device under test, and adjusts the signal source output signal power or fine-tunes the antenna position, so that the signal-to-noise ratio received by the device under test each time is a fixed value, thereby ensuring the consistency of the electromagnetic compatibility test. Compared with the prior art, the electromagnetic compatibility test method of the present application can ensure the consistency of each electromagnetic compatibility test without increasing the cost, thereby improving the reference value of each electromagnetic compatibility test.

[0039] Optionally, a method for obtaining the signal-to-noise ratio when the device under test receives a preset radio frequency signal is as follows: Figure 2 See Figure 2 , Figure 2 yes Figure 1 FIG. 1 is a flow chart of an embodiment of step S102 in FIG. Figure 2 As shown, this embodiment can be Figure 2 The steps shown implement the step of obtaining the signal-to-noise ratio when the device under test receives the preset radio frequency signal in step S102, specifically including steps S201 to S202:

[0040] Step S201: obtaining message information parsed when the device under test receives a preset radio frequency signal.

[0041] In this embodiment, when obtaining the signal-to-noise ratio when the device under test receives the preset radio frequency signal, the message information when the device under test receives the preset radio frequency signal can be read and analyzed by the control device.

[0042] Step S202: Acquire a signal-to-noise ratio based on the message information.

[0043] After obtaining the message information, analysis can be performed based on the message information to obtain the signal-to-noise ratio of the device under test.

[0044] Optionally, a method for obtaining a signal-to-noise ratio based on message information is as follows: Figure 3 See Figure 3 , Figure 3 yes Figure 2 FIG. 1 is a flow chart of an embodiment of step S202 in FIG. Figure 3 As shown, this embodiment can be Figure 3 The steps shown implement step S202, which specifically includes steps S301 to S302:

[0045] Step S301: Analyze the message information to obtain the corresponding visible satellite quantity information.

[0046] In this embodiment, after the message information is acquired, the message information may be analyzed to acquire the number of visible satellites (GNSS Satelites in View, GSV) of the device under test.

[0047] Step S302: Obtaining a signal-to-noise ratio based on the carrier-to-noise ratio information in the visible satellite quantity information.

[0048] After the corresponding GSV information is obtained, the eighth bit of data information of the GSV information is obtained, which is the signal-to-noise ratio.

[0049] For example, if the GSV information is $GPGSV, 3, 1, 10, 25, 68, 053, 47, 21, 59, 306, 49, 29, 56, 161, 49, 31, 36, 265, 49*79, the obtained signal-to-noise ratio is 47.

[0050] Optionally, the present application further proposes a method for testing electromagnetic compatibility, see Figure 4 , Figure 4 FIG. 2 is a flow chart of a second embodiment of the electromagnetic compatibility testing method provided by the present application. Figure 4 As shown, the electromagnetic compatibility testing method of this embodiment specifically includes steps S401 to S405:

[0051] Step S401: Control the signal source to output a preset radio frequency signal to the device under test through the transmitting antenna.

[0052] Step S401 is the same as step S101 and will not be described again.

[0053] Step S402: Determine whether the device under test receives a preset radio frequency signal and is successfully positioned.

[0054] In this embodiment, after the device under test and the signal source and other devices are powered on and each part enters a normal working state, and then the signal source is controlled to output a preset RF signal to the device under test through the transmitting antenna, it is also necessary to determine whether the device under test has successfully positioned itself after receiving the preset RF signal.

[0055] In this embodiment, the device under test takes a vehicle-mounted GNSS module as an example, and the control device is connected to the vehicle-mounted GNSS module to monitor and determine whether the device under test can successfully locate after receiving a preset radio frequency signal.

[0056] If the device under test is successfully located, the process goes to step S403; if the device under test is not successfully located, the process returns to step S401.

[0057] Step S403: obtaining a signal-to-noise ratio when the device under test receives a preset radio frequency signal, and determining whether the signal-to-noise ratio is the same as a preset signal-to-noise ratio.

[0058] Step S403 is the same as step S102 and will not be described again.

[0059] If the signal-to-noise ratio is different from the preset signal-to-noise ratio, the process goes to step S404 ; if the signal-to-noise ratio is the same as the preset signal-to-noise ratio, the process goes to step S405 .

[0060] Step S404: Adjust the signal source or the transmitting antenna.

[0061] Step S404 is consistent with step S103 and will not be described again.

[0062] Step S405: Start performing electromagnetic compatibility testing on the device under test.

[0063] Step S405 is the same as step S104 and will not be described again.

[0064] Optionally, the present application further proposes an electromagnetic compatibility testing system, see Figure 5 , Figure 5 FIG. 1 is a schematic diagram of the structure of an embodiment of an electromagnetic compatibility test system provided by the present application. Figure 5 As shown, the electromagnetic compatibility testing system 100 of this embodiment includes a signal source 10 , a transmitting antenna 20 , a control device 30 , a device under test 40 , a receiving antenna 50 and a supporting assembly 60 .

[0065] Among them, the signal source 10 transmits a preset radio frequency signal through the transmitting antenna 20; the control device 30 and the device under test 40 are both arranged on the supporting assembly 60; the device under test 40 is connected to the receiving antenna 50, and the receiving antenna 50 is used to receive the preset radio frequency signal and transmit it to the device under test 40; the control device 30 is connected to the device under test 40, and is used to execute the electromagnetic compatibility test method of any of the above embodiments.

[0066] Among them, the control device 30 can be set as a host computer in this embodiment, and the signal source 10 needs to be matched with the transmitting antenna 20; the material of the supporting component 60 can be set to a 50mm thick low relative dielectric constant material (relative dielectric constant ε<=1.4). In addition, in this embodiment, the distance between the transmitting antenna 20 and the receiving antenna 50 can be set to about 1 meter.

[0067] Alternatively, if Figure 5 As shown, in this embodiment, the electromagnetic compatibility test system 100 of this embodiment also includes a darkroom 70, and the device under test 40, the supporting assembly 60, the transmitting antenna 20 and the receiving antenna 50 are arranged in the darkroom 70; the control device 30 and the signal source 10 are arranged outside the darkroom 70.

[0068] Alternatively, if Figure 5 As shown, in this embodiment, the electromagnetic compatibility test system 100 of this embodiment also includes a power supply filter module 80, which is connected to the device under test 40 for isolating radio wave interference, providing stable test impedance, and supplying power to the device under test 40.

[0069] Optionally, the present application further proposes a computer-readable storage medium. Figure 6 , Figure 6 It is a structural schematic diagram of an embodiment of a computer-readable storage medium provided by the present application.

[0070] The computer-readable storage medium 200 of the embodiment of the present application stores program instructions 210 therein, and the program instructions 210 are executed by a processor to implement the electromagnetic compatibility testing method of any of the above embodiments.

[0071] Among them, the program instructions 210 can form a program file and be stored in the above-mentioned storage medium in the form of a software product, so that an electronic device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) executes all or part of the steps of each implementation method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes, or terminal devices such as computers, servers, mobile phones, tablets, etc.

[0072] The computer-readable storage medium 200 of this embodiment may be, but is not limited to, a USB flash drive, an SD card, a PD optical drive, a mobile hard disk, a large-capacity floppy drive, a flash memory, a multimedia memory card, a server, and the like.

[0073] In one embodiment, a computer program product or computer program is provided, the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the electronic device performs the steps in the above-mentioned method embodiments.

[0074] In addition, if the above functions are implemented in the form of software functions and sold or used as independent products, they can be stored in a storage medium readable by a mobile terminal, that is, the present application also provides a storage device storing program data, the program data can be executed to implement the method of the above embodiment, and the storage device can be, for example, a USB flash drive, an optical disk, a server, etc. In other words, the present application can be embodied in the form of a software product, which includes a number of instructions for enabling a smart terminal to execute all or part of the steps of the method described in each embodiment.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] Any process or method description in a flowchart or otherwise described herein may be understood to represent a mechanism, segment or portion of a code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0077] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (which can be a personal computer, server, network device or other system that can fetch instructions from the instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0078] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for testing electromagnetic compatibility, characterized in that: include: The control signal source outputs a preset radio frequency signal to the device under test through the transmitting antenna; Obtaining a signal-to-noise ratio when the device under test receives the preset radio frequency signal, and determining whether the signal-to-noise ratio is the same as a preset signal-to-noise ratio; In response to the signal-to-noise ratio being different from the preset signal-to-noise ratio, adjusting the signal source or the transmitting antenna; In response to the signal-to-noise ratio being the same as the preset signal-to-noise ratio, starting to perform an electromagnetic compatibility test on the device under test.

2. The electromagnetic compatibility testing method according to claim 1, characterized in that: The step of obtaining the signal-to-noise ratio when the device under test receives the preset radio frequency signal includes: Acquire message information parsed when the device under test receives the preset radio frequency signal; The signal-to-noise ratio is acquired based on the message information.

3. The electromagnetic compatibility testing method according to claim 2, characterized in that: The step of acquiring the signal-to-noise ratio based on the message information includes: Analyzing the message information to obtain information on the number of visible satellites; The signal-to-noise ratio is obtained based on the carrier-to-noise ratio information in the visible satellite quantity information.

4. The electromagnetic compatibility testing method according to claim 1, characterized in that: The step of adjusting the signal source or the transmitting antenna comprises: Adjust the output power value of the signal source or adjust the position of the transmitting antenna.

5. The electromagnetic compatibility testing method according to claim 1, characterized in that: Before the step of obtaining the signal-to-noise ratio when the device under test receives the preset radio frequency signal, and after the step of controlling the signal source to output the preset radio frequency signal to the device under test through the transmitting antenna, the testing method further includes: Determine whether the device under test successfully locates after receiving the preset radio frequency signal; In response to the device under test being successfully located, executing a step of obtaining a signal-to-noise ratio when the device under test receives the preset radio frequency signal; In response to the device under test not being successfully positioned, the process returns to executing the step of controlling the signal source to output a preset radio frequency signal to the device under test via the transmitting antenna.

6. The electromagnetic compatibility testing method according to claim 1, characterized in that: The preset signal-to-noise ratio is set to 38-42 dB-Hz.

7. An electromagnetic compatibility testing system, characterized in that: include: Signal source, transmitting antenna, control equipment, device under test, receiving antenna and supporting components; Wherein, the signal source transmits a preset radio frequency signal through the transmitting antenna; the control device and the device under test are both arranged on the supporting assembly; the device under test is connected to the receiving antenna, and the receiving antenna is used to receive the preset radio frequency signal and transmit it to the device under test; the control device is connected to the device under test, and is used to execute the electromagnetic compatibility testing method described in any one of claims 1-6.

8. The electromagnetic compatibility testing system according to claim 7, characterized in that: The test system further includes a darkroom, wherein the device under test, the support assembly, the transmitting antenna and the receiving antenna are arranged in the darkroom; and the control device and the signal source are arranged outside the darkroom.

9. The electromagnetic compatibility testing system according to claim 7, characterized in that: The test system further comprises a power filter module, which is connected to the device under test and is used to isolate radio wave interference, provide stable test impedance, and supply power to the device under test.

10. A computer-readable storage medium, characterized in that: Program instructions are stored therein, and the program instructions are executed to implement the electromagnetic compatibility testing method described in any one of claims 1-6.

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