Reference ground plane radiation field strength evaluation method, system, device and medium

Abstract

The present application discloses a reference ground plane radiation field strength evaluation method, system, device and medium, the method comprising: obtaining the radiation configuration parameters and test configuration parameters of the reference ground plane; the reference ground plane comprises a plurality of position points; for each position point, according to the radiation configuration parameters, controlling the electromagnetic interference generating device to generate electromagnetic interference; according to the test configuration parameters, controlling the electromagnetic interference evaluation device to perform a radiation emission test on the position point to obtain the radiation emission field strength value of the position point; based on the radiation emission field strength values ​​of each position point, evaluating the radiation emission field strength uniformity of each position point in the reference ground plane to obtain an evaluation result. This scheme can more comprehensively and accurately evaluate the radiation emission field strength uniformity of each position point in the reference ground plane, improve the evaluation accuracy, and facilitate accurate verification of whether the radiation field strength uniformity meets the test requirements.

Description

Technical Field

[0001] The present invention generally relates to the technical field of electromagnetic compatibility testing, and in particular to a reference ground plane radiation field strength evaluation method, system and medium. Background Art

[0002] With the continuous development of automobile technology, in order to ensure the safe operation of vehicles, vehicles need to be tested for electromagnetic compatibility. In the process of electromagnetic compatibility testing, radiation emission testing is an important part. This test is used to evaluate whether the electromagnetic radiation generated by electronic equipment or systems in normal working conditions meets the relevant standards. In order to ensure the accuracy and repeatability of the test results, the test must be carried out under strict test conditions.

[0003] Among them, the use of the reference ground plane is an important part of the radiation emission test. The reference ground plane is mainly used to provide a flat ground reference to facilitate accurate measurement of the radiation emission level of electronic equipment or systems during the test process. During the test process, when the size of the sample or system under test is larger than the conventional size, the size of the test bench and the corresponding reference ground plane will increase accordingly. When the size increases to a certain extent, the non-grounded edge of the entire test bench may become a test reference point. However, when the size of the sample or system under test is large, due to factors such as the test cavity structure and the influence of the power environment, the reference ground plane actually used may have certain inconsistencies and uneven distribution of radiation field strength, which in turn affects the accuracy and reproducibility of the test results. Therefore, in order to ensure the accuracy and reproducibility of the test results, how to evaluate the uniformity of the radiation field strength at the edge of the reference ground plane for radiation emission is an urgent problem to be solved. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a reference ground plane radiation field strength evaluation method, system, device and medium.

[0005] In a first aspect, the present invention provides a method for evaluating ground plane radiation field strength, the method comprising:

[0006] Obtain radiation configuration parameters and test configuration parameters of a reference ground plane; the reference ground plane includes a plurality of position points, and the test configuration parameters corresponding to each of the position points include a test frequency range, a test bandwidth, a test step, and a measurement time; the test frequency range includes a plurality of test frequency bands, and each of the test frequency bands corresponds to a type of receiving antenna;

[0007] For each of the location points, according to the radiation configuration parameters, controlling the electromagnetic interference generating device to generate electromagnetic interference;

[0008] According to the test configuration parameters, controlling the electromagnetic interference evaluation device to perform a radiation emission test on the location point to obtain a radiation emission field strength value of the location point;

[0009] Based on the radiation emission field strength value of each of the position points, the uniformity of the radiation emission field strength of each position point in the reference ground plane is evaluated to obtain an evaluation result.

[0010] In one of the embodiments, based on the radiation emission field intensity value of each of the position points, the uniformity of the radiation emission field intensity of each position point in the reference ground plane is evaluated to obtain an evaluation result, including:

[0011] Determine the arithmetic mean and the test standard deviation according to the radiation emission field strength values ​​of each of the said locations;

[0012] Calculate the Z ratio score of each position point based on the radiation emission field strength value, the arithmetic mean and the test standard deviation;

[0013] For each position point, the Z ratio score is compared with a preset range to obtain a radiation emission field intensity uniformity evaluation result of each position point in the reference ground plane.

[0014] In one embodiment, the Z ratio score is compared with a preset range to obtain a radiation emission field intensity uniformity evaluation result for each position point in the reference ground plane, including:

[0015] When the Z ratio score is within the preset range, the uniformity of the radiation emission field intensity of the location point is at the second level; the preset range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold;

[0016] When the Z ratio score is less than or equal to the first preset threshold, the radiation emission field intensity uniformity evaluation result of the location point is at the first level;

[0017] When the Z ratio score is greater than or equal to the second preset threshold, the radiation emission field intensity uniformity evaluation result of the location point is at the third level; the uniformity at the first level is greater than the uniformity at the second level, and the uniformity at the second level is greater than the uniformity at the third level.

[0018] In one of the embodiments, the electromagnetic interference assessment device comprises: a receiving antenna, an amplifier and a measuring receiver;

[0019] According to the test configuration parameters, controlling the electromagnetic interference evaluation device to perform a radiation emission test on the location point to obtain the radiation emission field strength value of the location point includes:

[0020] According to the test configuration parameters, controlling the test parameter configuration of the measurement receiver and the receiving antenna;

[0021] When the test parameter configuration is completed, the receiving antenna is controlled to obtain a radiation signal; the radiation signal is obtained after the electromagnetic interference generating device generates electromagnetic interference;

[0022] Controlling the amplifier to amplify the radiation signal to obtain an amplified radiation signal;

[0023] The measuring receiver is controlled to receive the amplified radiation signal, and the amplified radiation signal is analyzed to obtain the radiation emission field strength value of the location point.

[0024] In one embodiment, analyzing the amplified radiation signal to obtain the radiation emission field strength value of the location point includes:

[0025] Obtaining an initial radiation emission field strength value of the amplified radiation signal;

[0026] Obtain the path attenuation value and antenna coefficient of each receiving antenna type corresponding to the receiving antenna;

[0027] The radiation transmission field strength value of the location point is determined according to the initial radiation transmission field strength value, the antenna coefficient and the path attenuation value.

[0028] In one embodiment, the electromagnetic interference generating device includes: a signal generating source; obtaining a path attenuation value of a receiving antenna corresponding to each receiving antenna type, including:

[0029] Acquire attenuation test parameters and attenuation radiation parameters; the attenuation test parameters include a test frequency range, the test frequency range includes multiple test frequency bands, and each test frequency band corresponds to a receiving antenna type;

[0030] For each receiving antenna type, when the signal generating source is connected to the measuring receiver via a baseline, the baseline is tested according to the attenuation test parameter and the attenuation radiation parameter to obtain a baseline value;

[0031] When the signal source, the reference line, the measured line, the receiving antenna and the measuring receiver are connected in sequence, the measured line is tested according to the attenuation test parameters and the attenuation radiation parameters to obtain the measured line value;

[0032] According to the baseline value and the measured line value, a path attenuation value of a receiving antenna corresponding to each receiving antenna type is determined.

[0033] In one of the embodiments, the electromagnetic interference generating device includes: a signal generating source;

[0034] According to the radiation configuration parameters, controlling the electromagnetic interference generating device to generate electromagnetic interference includes:

[0035] According to the radiation configuration parameters, controlling the radiation parameter configuration of the signal generating source;

[0036] When the radiation parameter configuration is completed, the signal generator is controlled to generate a radio frequency signal to generate electromagnetic interference.

[0037] In a second aspect, an embodiment of the present application provides a ground plane radiation field strength assessment system, the system comprising: a main control device, an electromagnetic interference generating device, and an electromagnetic interference assessment device; the main control device establishes communication connections with the electromagnetic interference assessment device and the electromagnetic interference generating device respectively;

[0038] The main control device is used to: obtain the radiation configuration parameters and test configuration parameters of the reference ground plane; and for each position point, according to the radiation configuration parameters, control the electromagnetic interference generating device to generate electromagnetic interference; and according to the test configuration parameters, control the electromagnetic interference evaluation device to perform a radiation emission test on the position point to obtain the radiation emission field strength value of the position point; the test configuration parameters corresponding to each of the position points include a test frequency range, a test bandwidth, a test step, and a measurement time; the test frequency range includes a plurality of test frequency bands, and each of the test frequency bands corresponds to a type of receiving antenna;

[0039] The electromagnetic interference generating device is used to: generate electromagnetic interference;

[0040] The electromagnetic interference evaluation device is used to: perform a radiation emission test on the location point to obtain an average radiation emission field strength of the location point;

[0041] The main control device is also used to evaluate the uniformity of the radiation emission field intensity of each position point in the reference ground plane based on the radiation emission field intensity value of each position point to obtain an evaluation result.

[0042] In a third aspect, an embodiment of the present application provides a main control device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method provided in the above embodiment.

[0043] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method provided in the above embodiment is implemented.

[0044] The embodiments of the present application provide a reference ground plane radiation field strength evaluation method, system, device and medium, the method comprising: obtaining radiation configuration parameters and test configuration parameters of the reference ground plane, the reference ground plane comprising multiple position points, the test configuration parameters corresponding to each position point comprising a test frequency range, a test bandwidth, a test step, and a measurement time, the test frequency range comprising multiple test frequency bands, each test frequency band corresponding to a receiving antenna type, and for each position point, according to the radiation configuration parameters, controlling an electromagnetic interference generating device to generate electromagnetic interference, and then according to the test configuration parameters, controlling an electromagnetic interference evaluation device to perform a radiation emission test on the position point to obtain a radiation emission field strength value of the position point, and finally, based on the radiation emission field strength value of each position point, evaluating the uniformity of the radiation emission field strength of each position point in the reference ground plane to obtain an evaluation result. Compared with the prior art, on the one hand, this technical solution provides electromagnetic interference according to the radiation configuration parameters, thereby simulating a real electromagnetic interference environment and providing data guidance information for the subsequent evaluation of the radiation field strength; on the other hand, according to the radiation configuration parameters, the radiation emission test is performed on the position point through the electromagnetic interference evaluation device, which can accurately determine the radiation emission field strength value of the position point, and comprehensively consider the radiation emission field strength value of each position point, so as to more comprehensively and accurately evaluate the uniformity of the radiation emission field strength of each position point in the reference ground plane, improve the evaluation accuracy, solve the problem of consistency of radiation emission test results of large-size or highly integrated system-level samples at different test reference points, facilitate accurate verification of whether the uniformity of radiation field strength meets the test requirements, and provide good data support for the accuracy and reproducibility of subsequent test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0046] Figure 1 A schematic diagram of the structure of a reference ground plane radiation field strength assessment system provided in an embodiment of the present application;

[0047] Figure 2 A schematic diagram of the structure of a reference ground plane radiation field strength assessment system provided by another embodiment of the present application;

[0048] Figure 3 A schematic diagram of a flow chart of a method for evaluating radiation field strength of a reference ground plane provided in an embodiment of the present application;

[0049] Figure 4 A schematic diagram of the structure of various positions on the reference ground plane provided in an embodiment of the present application;

[0050] Figure 5A schematic diagram of the structure of the connection between the rod antenna and the signal generating source provided in an embodiment of the present application;

[0051] Figure 6 A schematic diagram of the structure of the connection between the logarithmic periodic antenna and the signal generation source provided in an embodiment of the present application;

[0052] Figure 7 A schematic diagram of the structure of the connection between the horn antenna and the signal generating source provided in an embodiment of the present application;

[0053] Figure 8 A schematic diagram of a flow chart of a method for determining a radiation emission field intensity uniformity evaluation result for each location point provided in an embodiment of the present application;

[0054] Fig. 9 A schematic diagram of a flow chart of a method for determining a radiation emission field strength value of a location point provided in an embodiment of the present application;

[0055] Fig.10 A schematic diagram of the structure of a reference ground plane radiation field strength assessment device provided in an embodiment of the present application;

[0056] Fig.11 A schematic diagram of the structure of a computer device provided in an embodiment of the present application;

[0057] Description of Reference Numerals

[0058] Electromagnetic interference generating device-10; test chamber-11; signal generating source-12; main control device-20; electromagnetic interference evaluating device-30; receiving antenna-31; amplifier-32; measuring receiver-33; reference ground plane-40. DETAILED DESCRIPTION

[0059] 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.

[0060] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0061] The reference ground plane radiation field strength evaluation system provided in the embodiment of the present application can be found in Figure 1The reference ground plane radiation field strength assessment system includes an electromagnetic interference generating device 10, a main control device 20, and an electromagnetic interference assessment device 30. The main control device 20 establishes communication connections with the electromagnetic interference assessment device 30 and the electromagnetic interference generating device 10 respectively, and the electromagnetic interference assessment device 30 also establishes a connection with the electromagnetic interference generating device 10.

[0062] The main control device 20 is used to: obtain the radiation configuration parameters and test configuration parameters of the reference ground plane; and for each position point, control the electromagnetic interference generating device to generate electromagnetic interference according to the radiation configuration parameters; and control the electromagnetic interference evaluation device to perform a radiation emission test on the position point according to the test configuration parameters to obtain the radiation emission field strength value of the position point; the test configuration parameters corresponding to each position point include a test frequency range, a test bandwidth, a test step, and a measurement time; the test frequency range includes multiple test frequency bands, and each test frequency band corresponds to a type of receiving antenna.

[0063] The electromagnetic interference generating device 10 is used to generate electromagnetic interference; the electromagnetic interference evaluating device 30 is used to perform a radiation emission test on a position point to obtain a radiation emission field strength value of the position point; the main control device 20 is also used to evaluate the uniformity of the radiation emission field strength of each position point in the reference ground plane based on the radiation emission field strength value of each position point to obtain an evaluation result.

[0064] It is understandable that the reference ground plane 40 is a test auxiliary device, which is used to provide a stable ground reference plane for the test process of the device under test, so that the test conditions are more consistent and controllable. The reference ground plane can usually be made of a metal material with good conductivity, such as a copper or aluminum plate, and its size should be large enough. The reference ground plane needs to be grounded to ensure that its emission characteristics are stable. For example, GB / T 18655-2018 requires the use of copper, brass, bronze or galvanized steel plates with a thickness of at least 0.5 mm. The minimum width of the reference ground plane used for radiated emission can be 1000m, and the minimum length can be 2000m, or 200m larger than the sides of the entire device under test.

[0065] During the radiation emission test, the electromagnetic interference generating device 10 can simulate the device under test, and is usually placed above the insulating support on the reference ground plane 40, and maintains a certain distance from the receiving antenna. The selection of this distance depends on the requirements of the test standard. For example, some standards may stipulate that measurements are performed at a distance of 1 meter, 3 meters or 10 meters. Among them, the reference ground plane 40 may include multiple position points, and the electromagnetic interference evaluation device 30 is used to evaluate the uniformity of the radiation emission field strength values ​​at each position point. The electromagnetic interference generating device 10 is used to simulate the device under test and place it in a shielded room or a darkroom, away from other electronic equipment that may cause interference.

[0066] The main control device 20 has data control and data processing functions, and may include a computer device, which may include a terminal for establishing a communication connection between the server and the server. The main control device 20 may be configured with EMC 32 test software, which is used to control the entire test process, including the processing of collected data and the analysis of results, and is also responsible for recording test conditions and results and generating reports that meet specifications.

[0067] Optionally, the server may be a single server, or a server cluster or distributed system composed of several servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (CDN), and big data and artificial intelligence platforms. An operating system may be running on the above-mentioned terminal, and the operating system may include but is not limited to Android system, IOS system, Linux system, Unix, Windows system, etc., and may also include a user interface (UI) layer, which may provide data display to the outside through the UI layer. In addition, a first control instruction may be sent to the electromagnetic interference generating device 10 based on an application programming interface (API), so that the electromagnetic interference generating device 10 receives and responds to the first control instruction and performs a corresponding operation; and is also used to send a second control instruction to the electromagnetic interference evaluation device 30, so that the electromagnetic interference evaluation device 30 receives and responds to the second control instruction and performs a corresponding operation.

[0068] Among them, the server and terminal can be equipped with a microprocessor (MCU), memory (ROM, RAM), input and output interface (I / O), analog-to-digital converter (A / D), and large-scale integrated circuits such as shaping and driving.

[0069] In one embodiment, see Figure 2 As shown, the electromagnetic interference evaluation device 30 comprises: a receiving antenna 31 , an amplifier 32 , and a measuring receiver 33 . The amplifier 32 is connected to the measuring receiver 33 and the receiving antenna 31 , respectively; the measuring receiver 33 is also electrically connected to the main control device 20 .

[0070] The receiving antenna 31 is used to obtain the radiation signal; the amplifier 32 is used to amplify the radiation signal to obtain the amplified radiation signal and send it to the measurement receiver; the measurement receiver 33 is used to receive the amplified radiation signal, analyze the amplified radiation signal, and obtain the average radiation emission field strength of the location point.

[0071] Specifically, the receiving antenna 31 may include multiple receiving antenna types, such as rod antennas, biconical antennas, log-periodic antennas, and horn antennas. Different ground antenna types correspond to different test frequency bands. Rod antennas are usually used for lower frequency communications, such as in the AM broadcast band (0.15-30MHz). Therefore, this type of antenna will be connected to the coaxial cable CABLE01-AM. In this frequency band, the attenuation of the cable is usually very small, which may be a few decibels per hundred meters (dB / 100m). Biconical antennas can be used in frequency bands ranging from tens of megahertz to hundreds of megahertz. This means that they may be connected to the coaxial cable CABLE02-FM1 (30-200MHz). In this frequency band, the attenuation may increase slightly, but still remain at a relatively low level. Log-periodic antennas are suitable for a wider frequency range and may cover multiple frequency bands. For example, they can be used in the range of 200-1000MHz, that is, connected to the coaxial cable CABLE03-FM2. As the frequency increases, the attenuation also increases accordingly. Horn antennas are usually used for higher frequencies, such as the microwave band (above 1GHz), so they may be connected to the coaxial cable CABLE04-FM3 (1000-6000MHz).

[0072] The amplifier 32 may be a signal amplifier, and the measured signal strength may be enhanced by the amplifier 32 so that the subsequent measurement receiver 33 may detect these signals more accurately. The measurement receiver 33 is used to analyze the amplified radiation signal to obtain the radiation emission field strength value of the location point. The measurement receiver 33 may be, for example, an EMI measurement receiver, which is used to analyze the characteristics of the signal.

[0073] Optionally, the electromagnetic interference generating device 10 includes: a test cavity 11 and a signal generating source 12; the signal generating source 12 is located inside the test cavity 11; the signal generating source 12 is used to generate a radio frequency signal.

[0074] Specifically, the test chamber 11 may be a darkroom, which may be understood as a shielded chamber with a large electrical size and highly conductive reflective walls. The shielded chamber is affixed with ferrite and absorbing foam to absorb electromagnetic waves and reduce reflection of electromagnetic waves.

[0075] The signal generator 12 is used to generate radio frequency signals of different frequencies and properties to simulate the radiation emission of the sample under test. The signal generator can generate various types of waveforms, including but not limited to sine waves, square waves, triangle waves, sawtooth waves, etc. The signal generator can be, for example, a comb wave signal generator, which can generate signals of multiple discrete frequencies to form a spectrum shape similar to comb teeth, and is often used for calibration and testing purposes.

[0076] The reference ground plane radiation field strength evaluation system provided in this embodiment includes an electromagnetic interference generating device, a main control device and an electromagnetic interference generating device. On the one hand, the device provides electromagnetic interference according to the radiation configuration parameters, thereby simulating a real electromagnetic interference environment and providing data guidance information for the subsequent radiation field strength evaluation; on the other hand, according to the radiation configuration parameters, the electromagnetic interference evaluation device performs a radiation emission test on the position point, which can accurately determine the radiation emission field strength value of the position point, and comprehensively consider the radiation emission field strength value of each position point, so as to more comprehensively and accurately evaluate the uniformity of the radiation emission field strength of each position point in the reference ground plane, improve the evaluation accuracy, solve the problem of consistency of radiation emission test results of large-size or highly integrated system-level samples at different test reference points, facilitate accurate verification of whether the radiation field strength uniformity meets the test requirements, and provide good data support for the accuracy and reproducibility of subsequent test results.

[0077] In an exemplary embodiment, Figure 3 As shown, a reference ground plane radiation field strength evaluation method is provided. The method is executed by a main control device, and can be specifically executed by a computer device such as a terminal or a server alone, or can be executed by a terminal and a server together. In the embodiment of the present application, the method is applied to Figure 1 The main control device 20 in the embodiment is taken as an example to illustrate, and the method includes the following steps S201 to S204. Among them:

[0078] Step S201, obtain the radiation configuration parameters and test configuration parameters of the reference ground plane; the reference ground plane includes multiple position points, and the test configuration parameters corresponding to each position point include a test frequency range, a test bandwidth, a test step, and a measurement time; the test frequency range includes multiple test frequency bands, and each test frequency band corresponds to a type of receiving antenna.

[0079] It should be noted that the above test frequency range, test bandwidth, test step, and measurement time can be customized according to actual needs. The test frequency range refers to the frequency range that needs to be tested, for example, it can be 1MHz-6000MHz. The test bandwidth refers to the bandwidth used by the test system when measuring within a certain test frequency band. The test step refers to the amplitude of each frequency change when performing a frequency scan. The measurement time is the time required to perform the test operation.

[0080] See also Figure 4 As shown, Figure 4A structural schematic diagram of various position points in the reference ground plane in the darkroom provided in an embodiment of the present application, the reference ground plane can be located on the test bench, and its corresponding area can be a rectangular area. The reference ground plane 40 area is divided. The test bench includes a long side and a short side. The center position of the long side of the test bench can be selected as the P1 position, and then the positions 1m apart on both sides of the P1 position in the horizontal direction are respectively determined as the P2 position and the P3 position, and then the position 1m apart from the P2 position in the horizontal direction is determined as the P4 position, and the position 1m apart from the P3 position in the horizontal direction is determined as the P5 position; and the center points of the left and right short sides of the test platform are selected as the P6 position and the P7 position respectively.

[0081] After determining each position point in the reference ground plane, the signal generator can be placed at the P1 position in the reference ground plane, and then the receiving antenna type is determined according to the test frequency band. The receiving antenna is connected to the measurement receiver through an amplifier, and the measurement receiver is connected to the computer equipment through a network cable. Among them, the signal generator and the receiving antenna are located in the darkroom, the measurement receiver and the computer equipment are located outside the darkroom, the vertical distance between the signal generator and the receiving antenna can be 1m, and the signal generator can be a comb wave signal generator. The comb wave signal generator is placed 10cm away from the edge of the test table and placed on a low dielectric constant (εr≤ 1.4), 5cm high insulating pad, and 1m vertically away from the receiving antenna. The comb signal generator is placed vertically in the polarization direction.

[0082] After the connection of each component in the system is completed, the radiation configuration parameters and test configuration parameters of the reference ground plane can be obtained, and then the radiation emission test is performed on each position point according to the radiation configuration parameters and test configuration parameters to obtain the radiation emission field strength value at the P1 position point. The signal amplifier source is placed at the P2 position, P3 position, P4 position, P5 position, P6 position and P7 position in turn, and then the connection between each component is established in turn, so as to obtain the radiation emission field strength values ​​at the P1 position, P2 position, P3 position, P4 position, P5 position, P6 position and P7 position points in turn. Among them, when moving the position of the signal amplifier source, the position of the receiving antenna needs to be moved at the same time to ensure that the vertical distance between the receiving antenna and the signal amplifier source is 1m.

[0083] It is understandable that the above-mentioned radiation configuration parameters and test configuration parameters can be pre-customized according to actual needs. The radiation configuration parameters refer to the parameters required to configure the electromagnetic interference generating device when generating radiation emission, and the test configuration parameters refer to the parameters required to configure the electromagnetic interference evaluation device when measuring radiation emission. Among them, the radiation configuration parameters and test position parameters corresponding to each position point on the reference ground plane.

[0084] Optionally, the radiation configuration parameters and test configuration parameters may be imported from an external device, or may be acquired through a database or blockchain. In this embodiment, no limitation is imposed on the method for acquiring the radiation configuration parameters and the test configuration parameters.

[0085] The above-mentioned radiation configuration parameters may include a signal source step, and the test configuration parameters may include a test frequency, a test bandwidth, a test step, and a measurement time. Taking the signal source as a comb wave signal generator as an example, its radiation configuration parameters and test configuration parameters may be shown in the following Table 1, wherein the corresponding signal source step in Table 1 is a parameter of the comb wave signal generator:

[0086] Table 1

[0087]

[0088] The test frequency range includes multiple test frequency bands, each test frequency band corresponds to a different receiving antenna type, and each test frequency band corresponds to a test bandwidth, a test step, a measurement time and a signal source step.

[0089] Step S202: for each location point, according to the radiation configuration parameters, controlling the electromagnetic interference generating device to generate electromagnetic interference.

[0090] It can be understood that the above-mentioned electromagnetic interference generating device may include: a signal generating source.

[0091] After the radiation configuration parameters are obtained, the radiation parameter configuration of the signal generator is controlled according to the radiation configuration parameters. When the radiation parameter configuration is completed, the signal generator is controlled to generate a radio frequency signal to generate electromagnetic interference.

[0092] Specifically, the signal source stepping parameters may be configured for the signal source, and the signal source stepping may include 1MHz, 5MHz, and 100MHz. After the configuration is completed, the signal source is controlled to generate a radio frequency signal according to the signal source stepping to generate electromagnetic interference.

[0093] Step S203, according to the test configuration parameters, the electromagnetic interference evaluation device is controlled to perform a radiation emission test on the location point to obtain the radiation emission field strength value of the location point.

[0094] The electromagnetic interference evaluation device includes: a receiving antenna, an amplifier and a measuring receiver. The test configuration parameters include: a test frequency band, a test bandwidth, a test step and a measurement time.

[0095] Specifically, after obtaining the test configuration parameters, the test parameter configuration of the measurement receiver and the receiving antenna can be controlled; when the test parameter configuration is completed, the receiving antenna is controlled to obtain the radiation signal; the radiation signal is obtained after the electromagnetic interference generating device generates electromagnetic interference to the device under test; the amplifier is controlled to amplify the radiation signal to obtain an amplified radiation signal; the measurement receiver is controlled to receive the amplified radiation signal, and the amplified radiation signal is analyzed to obtain the radiation emission field strength value of the location point.

[0096] Specifically, in the process of obtaining the radiation emission field strength value of each position point, the measurement receiver may be set with the test frequency band, the corresponding test bandwidth, test step, measurement time and other parameters. For example, when the test frequency band is between 150kHz and 30MHz, the configured test bandwidth is 9kHz, the test step is 5kHz, and the measurement time is 50ms; when the test frequency band is between 30MHz and 200MHz, the configured test bandwidth is 120kHz, the test step is 50kHz, and the measurement time is 5ms; and the corresponding signal source radiation configuration parameter signal source step is configured to be 1MHz. Then for each position point, the computer device controls the measurement receiver and the signal source to operate according to the corresponding configuration parameters, and then controls the receiving antenna to obtain the radiation signal, and sends the radiation signal to the amplifier, so that the amplifier amplifies the radiation signal to obtain the amplified radiation signal, and sends the amplified radiation signal to the measurement receiver, so that the measurement receiver receives the amplified radiation signal, and analyzes the amplified radiation signal. According to the test standard, the radiation emission test is performed on different test frequency bands in the test frequency range to obtain the radiation emission field strength value of each position point. Among them, using a smaller test step can improve the precision of the test, and using a larger step can complete the test faster.

[0097] For example, the computer device may first determine the radiation emission field strength value determined at position 1. The specific process is to first place the signal generator at position 1. Figure 5 As shown, the signal source 12 is connected to the receiving antenna 31 with an interval of 1m. The receiving antenna 31 is a rod antenna, and the rod antenna is connected to the computer device through an amplifier and a measuring receiver in sequence. According to the test configuration parameters and radiation configuration parameters, the test frequency band of the measuring receiver is set to 150kHz-30MHz, the test bandwidth is 9kHz, the test step is 5kHz, and the measurement time is 50ms. The signal source step is set to 1MHz, and then the built-in test software of the computer device is run to obtain the radiation emission field strength values ​​corresponding to the test frequency points of 1MHz, 10MHz, 20MHz and 30MHz in the test frequency band 150kHz-30MHz; please continue to refer to Figure 4As shown, the signal source is connected to the receiving antenna 31, which is a biconical antenna and is 1m away from the signal source. Figure 4 The signal source is not shown. According to the test configuration parameters and radiation configuration parameters, the test frequency band of the measurement receiver is set to 30MHz-200MHz, the test bandwidth is 120kHz, the test step is 50kHz, the measurement time is 5ms, and the signal source step is set to 1MHz. Then run the built-in test software of the computer device to obtain the radiation emission field strength values ​​corresponding to the test frequencies of 50MHz, 100MHz and 200MHz in the test frequency band 30MHz-200MHz; please continue to refer to Figure 6 As shown, the signal source 12 is connected to the receiving antenna 31, which is a logarithmic periodic antenna and is 1m away from the signal source. According to the test configuration parameters and radiation configuration parameters, the test frequency band of the measurement receiver is set to 200-1000MHz, the test bandwidth is 120kHz, the test step is 50kHz, the measurement time is 5ms, and the signal source step is set to 5MHz. Then run the test software built into the computer device to obtain the radiation emission field strength values ​​corresponding to the test frequency points of 200MHz, 250MHz, 300MHz, 350MHz, ..., 1000MHz in the test frequency band 200-1000MHz. And so on, see Figure 7 As shown, the signal generator 12 is connected to the receiving antenna 31, which is a horn antenna and is 1m away from the signal generator 12, and the radiation emission field strength values ​​corresponding to each frequency band within the test frequency band corresponding to the horn antenna are obtained, thereby obtaining the radiation emission field strength values ​​corresponding to each test frequency point in the test frequency range at position 1.

[0098] Similarly, similar to the above test method, place the signal generator at position 2, connect the corresponding receiving antenna and perform the test process in accordance with the above test frequency band, obtain the radiation emission field strength value corresponding to each test frequency point in the test frequency range of position 2, and then determine the radiation emission field strength value corresponding to each test frequency point in the test frequency range of position 3, position 4, position 5, position 6 and position 7. The radiation emission field strength value of each position point in the frequency range can refer to the average radiation emission field strength (AV value), and the frequency range can be 1MHz-6000MHz, which includes multiple frequency points. The AV value refers to the long-term average amplitude of the signal, which can be shown in Table 2 below:

[0099] Table 2

[0100]

[0101] In this embodiment, after the test parameters are configured, the radiation signal is acquired in real time through the receiving antenna and amplified, which can enhance the signal strength so that subsequent measurement receivers can more accurately detect these radiation signals, thereby improving the accuracy of determining the radiation transmission field strength value at each location point.

[0102] Step S204, based on the radiation emission field strength value of each position point, the uniformity of the radiation emission field strength of each position point in the reference ground plane is evaluated to obtain an evaluation result.

[0103] It is understandable that the uniformity of the radiation emission field intensity at each position point in the reference ground plane will affect the distribution of the radiation emission field intensity. In order to provide theoretical support for the accuracy and reproducibility of the radiation field intensity test results of samples of unconventional sizes or large-scale, highly integrated samples with electric drive and electric control as the system, it is necessary to accurately evaluate the uniformity of the radiation emission at the edge of the reference ground plane on the test bench in the electromagnetic compatibility semi-wave laboratory. The sample can be a component on the device under test, or the entire device under test.

[0104] Specifically, after obtaining the radiation emission field strength value of each position point, the radiation emission field strength value of each position point can be analyzed to evaluate the uniformity of the radiation emission field strength of each position point to obtain an evaluation result. The evaluation result is used to characterize the degree of uniformity of the radiation emission of each position point, and may include a uniformity level, for example, multiple levels, and for a certain position point, the higher the level, the better the uniformity of the radiation emission of the position point.

[0105] The embodiment of the present application provides a method for evaluating the radiation field strength of a ground plane, the method comprising: obtaining radiation configuration parameters and test configuration parameters of a reference ground plane, the reference ground plane comprising multiple position points, the test configuration parameters corresponding to each position point comprising a test frequency range, a test bandwidth, a test step, and a measurement time, the test frequency range comprising multiple test frequency bands, each test frequency band corresponding to a type of receiving antenna, and for each position point, according to the radiation configuration parameters, controlling an electromagnetic interference generating device to generate electromagnetic interference, and then according to the test configuration parameters, controlling an electromagnetic interference evaluating device to perform a radiation emission test on the position point to obtain a radiation emission field strength value of the position point, and finally, based on the radiation emission field strength value of each position point, evaluating the uniformity of the radiation emission field strength of each position point in the reference ground plane to obtain an evaluation result. Compared with the prior art, on the one hand, this technical solution provides electromagnetic interference according to the radiation configuration parameters, thereby simulating a real electromagnetic interference environment and providing data guidance information for the subsequent evaluation of the radiation field strength; on the other hand, according to the radiation configuration parameters, the radiation emission test is performed on the position point through the electromagnetic interference evaluation device, which can accurately determine the radiation emission field strength value of the position point, and comprehensively consider the radiation emission field strength value of each position point, so as to more comprehensively and accurately evaluate the uniformity of the radiation emission field strength of each position point in the reference ground plane, improve the evaluation accuracy, solve the problem of consistency of radiation emission test results of large-size or highly integrated system-level samples at different test reference points, facilitate accurate verification of whether the uniformity of radiation field strength meets the test requirements, and provide good data support for the accuracy and reproducibility of subsequent test results.

[0106] In another exemplary embodiment of the present application, in order to accurately determine the evaluation result, the uniformity of the radiation emission field intensity at each position point in the reference ground plane can be evaluated based on the radiation emission field intensity value at each position point to obtain the evaluation result, such as Figure 8 As shown, the above step 204 is replaced by the following steps S301 to S303:

[0107] Step S301, determining the arithmetic mean and the test standard deviation according to the radiation emission field strength value of each position point.

[0108] Step S302, calculating the Z ratio score of each location point based on the radiation emission field strength value, the arithmetic mean and the test standard deviation.

[0109] Step S303: for each position point, compare the Z ratio score with a preset range to obtain a radiation emission field intensity uniformity evaluation result of each position point in the reference ground plane.

[0110] It should be noted that the above-mentioned various position points may include seven position points, namely position 1, position 2, position 3, position 4, position 5, position 6, and position 7. Specifically, taking the radiation emission field intensity value as the radiation emission field intensity average value as an example, after obtaining the radiation emission field intensity average value of each position point, the sum of the radiation emission field intensity average values ​​of each position point can be calculated first, and then divided by 7 to obtain the arithmetic mean, and then the test standard deviation S is calculated, which can be expressed by the following formula:

[0111] ;

[0112] Where n is the number of location points, is the average radiation emission field strength of the i-th position point, It is the arithmetic mean of the average radiation emission field strength at each location point.

[0113] After obtaining the test standard deviation and arithmetic mean, calculate the Z ratio score of each location point, which can be expressed by the following formula:

[0114] ;

[0115] Where S is the test standard deviation, is the average radiation emission field strength of the i-th position point, is the arithmetic mean of the average radiation emission field strength at each location point, is the Z ratio score of the ith position point.

[0116] Optionally, after obtaining the Z ratio score of each position point, the Z ratio score can be compared with the preset range to obtain the radiation emission field intensity uniformity evaluation result of each position point in the reference ground plane. The specific process is that when the Z ratio score is within the preset range, the radiation emission field intensity uniformity of the position point is at the second level; the preset range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold; when the Z ratio score is less than or equal to the first preset threshold, the radiation emission field intensity uniformity evaluation result of the position point is at the first level; when the Z ratio score is greater than or equal to the second preset threshold, the radiation emission field intensity uniformity evaluation result of the position point is at the third level; the uniformity at the first level is greater than the uniformity at the second level, and the uniformity at the second level is greater than the uniformity at the third level.

[0117] It should be noted that the above preset range is customized according to actual needs, and may include a first preset threshold and a second preset threshold, the first preset threshold is less than the second preset threshold, for example, the first preset threshold is 2, and the second preset threshold is 3. The first level of uniformity can be understood as good uniformity of radiation field intensity; the second level of uniformity can be understood as the uniformity of radiation field intensity is pending and needs to be confirmed again; the third level of uniformity can be understood as poor uniformity of radiation field intensity, then the position point cannot be used as a test reference point, and darkroom-related supporting rectification is required.

[0118] For example, taking the first preset threshold as 2 and the second preset threshold as 3 as an example, for the uniformity of the radiation emission field intensity at a certain location, it can be set according to the normal distribution and confidence probability (generally 95%) of the test results. When ≤2, the characterization uniformity is relatively satisfactory and the radiation field strength uniformity is excellent; 2< <3, characterization uniformity is pending, uniformity needs further confirmation; ≥3, the characterization uniformity is not satisfactory, the uniformity of the radiation field strength is not good, this position point cannot be used as a test reference point, and relevant darkroom supporting rectification is required.

[0119] In this embodiment, by determining the arithmetic mean and the test standard deviation according to the radiation emission field strength value of each position point, and based on the radiation emission field strength value, the arithmetic mean and the test standard deviation, the Z ratio score of each position point can be calculated more accurately, and then by comparing the Z ratio score with a preset range, the radiation emission field strength uniformity evaluation result of each position point in the reference ground plane can be obtained in a finer granularity according to the comparison result, thereby improving the evaluation accuracy.

[0120] In another exemplary embodiment of the present application, when the attribute parameter information includes a positioning signal, in order to accurately determine the average radiation emission field strength of the location point, the amplified radiation signal can be analyzed to obtain the radiation emission field strength value of the location point, such as Fig. 9 As shown, the method may include the following steps S401 to S403:

[0121] Step S401, obtaining the initial radiation emission field strength value of the amplified radiation signal.

[0122] It should be noted that the amplified radiation signal refers to the signal after the radiation signal has been amplified, and the initial radiation emission field strength value refers to the signal generated after the signal source transmits the radio frequency signal to the device under test.

[0123] Optionally, the above-mentioned initial radiation emission field strength value can be obtained through real-time detection, or can be obtained by importing from an external device, or can be obtained from a database or blockchain. In this embodiment, there is no limitation on the method for obtaining the initial radiation emission field strength value.

[0124] Step S402: Obtain the path attenuation value and antenna coefficient of the receiving antenna corresponding to each receiving antenna type.

[0125] Step S403, determining the radiation transmission field strength value of the location point according to the initial radiation transmission field strength value, the antenna coefficient and the path attenuation value.

[0126] In this embodiment, the path attenuation value describes the energy loss experienced by the signal during transmission from the transmitter to the receiver, which refers to the energy attenuation caused by the increase in distance, air medium absorption and other physical factors during the signal propagation process. Path attenuation usually includes free space path loss and additional losses in other actual environments (such as atmospheric absorption, refraction, reflection, etc.). Among them, the antenna coefficient can be obtained from the antenna manual or calibration report, and then input into the EMC32 software built into the computer device. The software will perform corresponding calculations based on the antenna coefficient and the initial radiation emission field strength value to obtain the radiation emission field strength value of each location point.

[0127] Specifically, in the process of obtaining the path attenuation value of the receiving antenna, the attenuation test parameters and the attenuation radiation parameters can be obtained first. The attenuation test parameters include a test frequency range. The test frequency range includes multiple test frequency bands. Each test frequency band corresponds to a receiving antenna type. For each receiving antenna type, when the signal source and the measuring receiver are connected through a baseline, the baseline is tested according to the attenuation test parameters and the attenuation radiation parameters to obtain the baseline value; when the signal source, the baseline, the measured line, the receiving antenna and the measuring receiver are connected in sequence, the measured line is tested according to the attenuation test parameters and the attenuation radiation parameters to obtain the measured line value; according to the baseline value and the measured line value, the path attenuation value of the receiving antenna corresponding to each receiving antenna type is determined.

[0128] It should be noted that the path attenuation of the radiation transmission system is tested using a signal generator and a measurement receiver, and the path attenuation value of the receiving antenna corresponding to each receiving antenna type is obtained. The above-mentioned attenuation test parameters and attenuation radiation parameters can be customized according to actual needs. The attenuation test parameters may include a test frequency range, a test bandwidth, a test step, and a measurement time. The attenuation radiation parameters include the output level of the signal generator. The attenuation test parameters and the attenuation radiation parameters can be shown in Table 3 below:

[0129] Table 3

[0130]

[0131] The above receiving antenna types may include a rod antenna, a biconical antenna, a log-periodic antenna, and a horn antenna. The attenuation test parameters and attenuation radiation parameters corresponding to each receiving antenna type are different, that is, the corresponding test frequency band, test bandwidth, test step, measurement time and output level are different. For example, the test frequency band for the rod antenna is 150kHz-30MHz, the test bandwidth is 9kHz, the test step is 5kHz, the measurement time is 50ms, and the output level is -30dBm; the test frequency band for the biconical antenna is 30-200MHz, the test bandwidth is 120kHz, the test step is 50kHz, the measurement time is 5ms, and the output level is -30dBm; the test frequency band for the logarithmic periodic antenna is 200-1000MHz, the test bandwidth is 120kHz, the test step is 50kHz, the measurement time is 5ms, and the output level is -30dBm; the test frequency band for the horn antenna is 1000-6000MHz, the test bandwidth is 1MHz, the test step is 500kHz, the measurement time is 5ms, and the output level is -30dBm.

[0132] For each type of receiving antenna, the signal generator is first connected to the measuring receiver through the baseline, and the measuring receiver is connected to the computer device. The computer device is provided with EMC32 software and test files. The test files can be located in the corresponding template in the Calibration Setups folder of the computer device. By running the EMC32 software and executing the test files, the baseline is tested according to the attenuation test parameters and attenuation radiation parameters corresponding to the above-mentioned receiving antenna to obtain the baseline value. After obtaining the baseline value, the signal generator is connected to the baseline, the measured line, the receiving antenna and the measuring receiver in sequence, so that the EMC32 software is run and the test software is executed according to the above-mentioned test frequency band to test the measured line to obtain the measured line value, and then the baseline value and the measured line value are subjected to difference processing to obtain the path attenuation value of the receiving antenna corresponding to each receiving antenna type.

[0133] Exemplarily, the computer device may first connect the signal generator to the measuring receiver through a reference line, and set the test frequency band of the measuring receiver to 150kHz-30MHz, the test bandwidth to 9kHz, the test step to 5kHz, the measurement time to 50ms, and the output level of the signal generator to -30dBm, and then control the operation of the EMC32 software and execute the test software to obtain the reference line value. Then, the signal generator is connected to the reference line, the measured line, the receiving antenna and the measuring receiver in sequence, and the EMC32 software is controlled and executed to obtain the measured line value, and then the reference line value and the measured line value are subjected to difference processing to obtain the path attenuation value corresponding to the rod antenna. Similarly, similar to the above-mentioned test method, the test process is executed to obtain the path attenuation value corresponding to the biconical antenna, the logarithmic periodic antenna, and the horn antenna.

[0134] It can be understood that the baseline refers to the connection line that ensures stable, reliable and accurate signal transmission between the signal source and the measurement receiver. The baseline has good electrical properties, such as stable impedance, low insertion loss and good shielding performance to ensure signal transmission instructions and can be used as a reference standard when performing precise measurements.

[0135] Furthermore, the above initial radiation transmission field strength value can be the reading of the measurement receiver (in dBuV). After obtaining the reading of the measurement receiver, the path attenuation value and the antenna coefficient, the radiation transmission field strength value of each position point (in dBuV / m) = receiver reading (in dBuV) + antenna coefficient (in dB / m) + path attenuation value (in dB). Different test frequency bands correspond to different receiving antenna types, and different receiving antenna types correspond to different path attenuation values.

[0136] In the embodiment of the present application, by obtaining the initial radiation transmission field strength value and the path attenuation value of each receiving antenna, the radiation transmission field strength value of the location point is made more accurate, and then based on the radiation transmission field strength value, a more accurate evaluation result is obtained.

[0137] Based on the same inventive concept, the embodiment of the present application also provides a reference ground plane radiation field strength assessment device for implementing the reference ground plane radiation field strength assessment method involved above. The implementation solution provided by the device to solve the problem is similar to the implementation solution recorded in the above method, so the specific limitations in one or more reference ground plane radiation field strength assessment device embodiments provided below can refer to the limitations of the reference ground plane radiation field strength assessment method above, and will not be repeated here.

[0138] In an exemplary embodiment, Fig.10 As shown, a reference ground plane radiation field strength evaluation device is provided, comprising:

[0139] The acquisition module 710 is used to acquire the radiation configuration parameters and test configuration parameters of the reference ground plane; the reference ground plane includes multiple position points, and the test configuration parameters corresponding to each position point include a test frequency range, a test bandwidth, a test step, and a measurement time; the test frequency range includes multiple test frequency bands, and each test frequency band corresponds to a receiving antenna type;

[0140] The interference generating module 720 is used to control the electromagnetic interference generating device to generate electromagnetic interference according to the radiation configuration parameters for each location point;

[0141] The test module 730 is used to control the electromagnetic interference evaluation device to perform a radiation emission test on the location point according to the test configuration parameters to obtain the radiation emission field strength value of the location point;

[0142] The evaluation module 740 is used to evaluate the uniformity of the radiation emission field intensity of each position point in the reference ground plane based on the radiation emission field intensity value of each position point to obtain an evaluation result.

[0143] As an optional implementation, the evaluation module 740 is specifically configured to:

[0144] According to the radiation emission field strength value at each location point, determine the arithmetic mean value and test standard deviation;

[0145] Calculate the Z score for each location point based on the radiation emission field strength value, arithmetic mean and test standard deviation;

[0146] For each location point, the Z ratio score is compared with a preset range to obtain the radiated emission field strength uniformity evaluation result of each location point in the reference ground plane.

[0147] As an optional implementation, the evaluation module 740 is further configured to:

[0148] When the Z ratio is within a preset range, the uniformity of the radiation emission field intensity of the location point is at the second level; the preset range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold;

[0149] When the Z ratio score is less than or equal to the first preset threshold, the radiation emission field intensity uniformity evaluation result of the location point is at the first level;

[0150] When the Z ratio score is greater than or equal to the second preset threshold, the radiation emission field intensity uniformity evaluation result of the location point is at the third level; the uniformity at the first level is greater than the uniformity at the second level, and the uniformity at the second level is greater than the uniformity at the third level.

[0151] As an optional implementation, the testing module 730 is specifically configured to:

[0152] According to the test configuration parameters, control the test parameter configuration of the measurement receiver and the receiving antenna;

[0153] When the test parameters are configured, the receiving antenna is controlled to obtain the radiation signal; the radiation signal is obtained after the electromagnetic interference generating device generates electromagnetic interference;

[0154] The control amplifier amplifies the radiation signal to obtain an amplified radiation signal;

[0155] The control measurement receiver receives the amplified radiation signal and analyzes the amplified radiation signal to obtain the radiation emission field strength value of the location point.

[0156] As an optional implementation, the testing module 730 is further configured to:

[0157] Obtaining an initial radiation emission field strength value of the amplified radiation signal;

[0158] Obtain the path attenuation value and antenna coefficient of each receiving antenna type corresponding to the receiving antenna;

[0159] The radiation transmission field strength value of the location point is determined based on the initial radiation transmission field strength value, antenna coefficient and path attenuation value.

[0160] As an optional implementation, the above device is also used for:

[0161] Obtaining attenuation test parameters and attenuation radiation parameters; the attenuation test parameters include a test frequency range, the test frequency range includes multiple test frequency bands, and each test frequency band corresponds to a receiving antenna type;

[0162] For each receiving antenna type, when the signal source and the measuring receiver are connected via a reference line, the reference line is tested according to the attenuation test parameters and the attenuation radiation parameters to obtain the reference line value;

[0163] When the signal source, the reference line, the measured line, the receiving antenna and the measuring receiver are connected in sequence, the measured line is tested according to the attenuation test parameters and the attenuation radiation parameters to obtain the measured line value;

[0164] According to the baseline value and the measured line value, the path attenuation value of the receiving antenna corresponding to each receiving antenna type is determined.

[0165] As an optional implementation manner, the interference generating module 720 is specifically configured to:

[0166] According to the radiation configuration parameters, control the radiation parameter configuration of the signal source;

[0167] When the radiation parameters are configured, the signal generator is controlled to generate a radio frequency signal to generate electromagnetic interference.

[0168] Among them, this implementation method is implemented to provide electromagnetic interference according to the radiation configuration parameters, thereby simulating a real electromagnetic interference environment and providing data guidance information for the subsequent evaluation of the radiation field strength; according to the radiation configuration parameters, the radiation emission test is performed on the position point through the electromagnetic interference evaluation device, which can accurately determine the radiation emission field strength value of the position point, and comprehensively consider the radiation emission field strength value of each position point, so as to more comprehensively and accurately evaluate the uniformity of the radiation emission field strength of each position point in the reference ground plane, improve the evaluation accuracy, solve the problem of consistency of radiation emission test results of large-size or highly integrated system-level samples at different test reference points, facilitate accurate verification of whether the uniformity of radiation field strength meets the test requirements, and provide good data support for the accuracy and reproducibility of subsequent test results.

[0169] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Fig.11 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store video tag processing data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a reference ground plane radiation field strength evaluation method is implemented.

[0170] Those skilled in the art will understand that Fig.11 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0171] In an exemplary embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0172] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0173] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0174] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0175] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0176] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0177] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0178] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for evaluating radiation field strength of a reference ground plane, characterized in that: The reference ground plane radiation field strength evaluation method comprises: Obtain radiation configuration parameters and test configuration parameters of a reference ground plane; the reference ground plane includes a plurality of position points, and the test configuration parameters corresponding to each of the position points include a test frequency range, a test bandwidth, a test step, and a measurement time; the test frequency range includes a plurality of test frequency bands, and each of the test frequency bands corresponds to a type of receiving antenna; For each of the location points, according to the radiation configuration parameters, controlling the electromagnetic interference generating device to generate electromagnetic interference; According to the test configuration parameters, controlling the electromagnetic interference evaluation device to perform a radiation emission test on the location point to obtain a radiation emission field strength value of the location point; Based on the radiation emission field strength value of each of the position points, evaluating the uniformity of the radiation emission field strength of each position point in the reference ground plane to obtain an evaluation result; Wherein, based on the radiation emission field strength value of each of the position points, the uniformity of the radiation emission field strength of each position point in the reference ground plane is evaluated to obtain an evaluation result, including: Determine the arithmetic mean and the test standard deviation according to the radiation emission field strength values ​​of each of the said locations; Calculate the Z ratio score of each position point based on the radiation emission field strength value, the arithmetic mean and the test standard deviation; For each position point, the Z ratio score is compared with a preset range to obtain a radiation emission field intensity uniformity evaluation result of each position point in the reference ground plane.

2. The reference ground plane radiation field strength evaluation method according to claim 1, characterized in that: Comparing the Z ratio score with a preset range to obtain a radiation emission field intensity uniformity evaluation result for each position point in the reference ground plane, including: When the Z ratio score is within the preset range, the uniformity of the radiation emission field intensity of the location point is at the second level; the preset range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold; When the Z ratio score is less than or equal to the first preset threshold, the radiation emission field intensity uniformity evaluation result of the location point is at the first level; When the Z ratio score is greater than or equal to the second preset threshold, the radiation emission field intensity uniformity evaluation result of the location point is at the third level; the uniformity at the first level is greater than the uniformity at the second level, and the uniformity at the second level is greater than the uniformity at the third level.

3. The reference ground plane radiation field strength evaluation method according to claim 1, characterized in that: The electromagnetic interference evaluation device comprises: a receiving antenna, an amplifier and a measuring receiver; According to the test configuration parameters, controlling the electromagnetic interference evaluation device to perform a radiation emission test on the location point to obtain the radiation emission field strength value of the location point includes: According to the test configuration parameters, controlling the test parameter configuration of the measurement receiver and the receiving antenna; When the test parameter configuration is completed, the receiving antenna is controlled to obtain a radiation signal; the radiation signal is obtained after the electromagnetic interference generating device generates electromagnetic interference; Controlling the amplifier to amplify the radiation signal to obtain an amplified radiation signal; The measuring receiver is controlled to receive the amplified radiation signal, and the amplified radiation signal is analyzed to obtain the radiation emission field strength value of the location point.

4. The reference ground plane radiation field strength evaluation method according to claim 3, characterized in that: Analyzing the amplified radiation signal to obtain the radiation emission field strength value of the location point includes: Obtaining an initial radiation emission field strength value of the amplified radiation signal; Obtain the path attenuation value and antenna coefficient of each receiving antenna type corresponding to the receiving antenna; The radiation transmission field strength value of the location point is determined according to the initial radiation transmission field strength value, the antenna coefficient and the path attenuation value.

5. The method for evaluating the radiation field strength of the reference ground plane according to claim 4, characterized in that: The electromagnetic interference generating device comprises: a signal generating source; obtaining a path attenuation value of a receiving antenna corresponding to each receiving antenna type, comprising: Acquire attenuation test parameters and attenuation radiation parameters; the attenuation test parameters include a test frequency range, the test frequency range includes multiple test frequency bands, and each test frequency band corresponds to a receiving antenna type; For each receiving antenna type, when the signal generating source is connected to the measuring receiver via a baseline, the baseline is tested according to the attenuation test parameter and the attenuation radiation parameter to obtain a baseline value; When the signal source, the reference line, the measured line, the receiving antenna and the measuring receiver are connected in sequence, the measured line is tested according to the attenuation test parameters and the attenuation radiation parameters to obtain the measured line value; According to the baseline value and the measured line value, a path attenuation value of a receiving antenna corresponding to each receiving antenna type is determined.

6. The reference ground plane radiation field strength evaluation method according to claim 5, characterized in that: According to the radiation configuration parameters, controlling the electromagnetic interference generating device to generate electromagnetic interference includes: According to the radiation configuration parameters, controlling the radiation parameter configuration of the signal generating source; When the radiation parameter configuration is completed, the signal generator is controlled to generate a radio frequency signal to generate electromagnetic interference.

7. A reference ground plane radiation field strength evaluation system, characterized in that: include: A main control device, an electromagnetic interference generating device, and an electromagnetic interference evaluating device; the main control device establishes communication connections with the electromagnetic interference evaluating device and the electromagnetic interference generating device respectively; The main control device is used to: obtain the radiation configuration parameters and test configuration parameters of the reference ground plane; and for each position point, according to the radiation configuration parameters, control the electromagnetic interference generating device to generate electromagnetic interference; and according to the test configuration parameters, control the electromagnetic interference evaluation device to perform a radiation emission test on the position point to obtain the radiation emission field strength value of the position point; the test configuration parameters corresponding to each of the position points include a test frequency range, a test bandwidth, a test step, and a measurement time; the test frequency range includes a plurality of test frequency bands, and each of the test frequency bands corresponds to a type of receiving antenna; The electromagnetic interference generating device is used to: generate electromagnetic interference; The electromagnetic interference evaluation device is used to: perform a radiation emission test on the location point to obtain a radiation emission field strength value of the location point; The main control device is also used to: evaluate the uniformity of the radiation emission field intensity of each position point in the reference ground plane based on the radiation emission field intensity value of each position point to obtain an evaluation result; The main control device is specifically used to: determine the arithmetic mean value and the test standard deviation according to the radiation emission field strength value of each of the position points; Calculate the Z ratio score of each position point based on the radiation emission field strength value, the arithmetic mean and the test standard deviation; For each position point, the Z ratio score is compared with a preset range to obtain a radiation emission field intensity uniformity evaluation result of each position point in the reference ground plane.

8. The reference ground plane radiation field strength evaluation system according to claim 7, characterized in that: The electromagnetic interference evaluation device comprises: a receiving antenna, an amplifier, and a measuring receiver, wherein the amplifier is connected to the measuring receiver and the receiving antenna respectively; the measuring receiver is also electrically connected to a main control device; The receiving antenna is used to: obtain the radiation signal; The amplifier is used to: amplify the radiation signal to obtain the amplified radiation signal and send it to the measurement receiver; The measuring receiver is used to receive the amplified radiation signal, analyze the amplified radiation signal, and obtain the radiation emission field strength value of the location point.

9. The reference ground plane radiation field strength evaluation system according to claim 7, characterized in that: The electromagnetic interference generating device comprises: a test cavity and a signal generating source; the signal generating source is located inside the test cavity; The signal generator is used to generate a radio frequency signal to generate electromagnetic interference.

10. A main control device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the reference ground plane radiation field strength evaluation method according to any one of claims 1 to 6.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the reference ground plane radiation field strength evaluation method described in any one of claims 1 to 6 is implemented.

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