Low-frequency high-electric-field radiation testing device, system and method

Abstract

The invention relates to a low-frequency high-electric-field radiation testing device, system and method, and the device comprises an input end which is used for transmitting an electromagnetic signal; the load end is used for receiving an electromagnetic signal; the bracket is arranged between the input end and the load end; two ends of the transmission line group are respectively connected with the input end and the load end, the middle part of the transmission line group is erected on the bracket, and the transmission line group is used for generating an electromagnetic field below when an electromagnetic signal is introduced and taking the electromagnetic field as a test area; the transmission line group is provided with a plurality of transmission lines, one end of each transmission line is radially erected on the support with the input end or the load end as the center, and the middle of each transmission line is erected on the same horizontal plane at a preset interval. According to the low-frequency high-electric-field radiation testing device, system and method provided by the invention, the problems of non-uniform field intensity, low test efficiency and high cost of a traditional antenna radiation mode in an HIRF test can be solved, a more uniform radiation field is realized, the test efficiency is improved, and the test cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic compatibility testing, and in particular to a low-frequency high electric field radiation testing device, system and method. Background Art

[0002] Electromagnetic compatibility testing is used to evaluate the performance and anti-interference ability of equipment in complex electromagnetic environments, ensuring that the equipment can work normally in complex electromagnetic environments with electromagnetic interference from other electronic equipment or electromagnetic interference from nature. It is usually used in equipment in the fields of aerospace, electronic communications, etc.

[0003] In the prior art, traditional electromagnetic compatibility (EMC) tests are mostly conducted using antenna radiation, using large antenna arrays or movable antennas to convert the signals generated by the RF signal generator into electromagnetic waves and radiate them into the test space. Test equipment such as aircraft components and communication base station equipment are placed in the radiation field to receive high-intensity electromagnetic radiation. At the same time, monitoring equipment is used to detect the working status and performance parameter changes of the test equipment to evaluate its anti-interference ability in a high-intensity radiation field (HIRF) environment.

[0004] However, in the above technical solution, it is difficult to ensure the uniformity of the antenna radiation field in a larger test space, especially for test areas with complex shapes and large areas. It is easy for different parts of the test equipment to receive large differences in radiation intensity, resulting in inaccurate test results. The construction and adjustment of large antenna arrays are complicated, and it is necessary to accurately calibrate parameters such as the position, direction and polarization of the antenna. When the test frequency band is wide, different types of antennas need to be replaced. For example, for a frequency coverage range of 10kHz-100MHz, 2-3 types of antennas need to be replaced, which greatly increases the test preparation time and operation complexity and reduces the test efficiency. At the same time, large antenna equipment itself is expensive, and its installation, maintenance and calibration require professional technicians and a large amount of resources. At the same time, it occupies a larger test site, increasing the cost of site rental.

[0005] Therefore, it is necessary to improve one or more problems existing in the above-mentioned related technical solutions.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] The purpose of the embodiments of the present disclosure is to provide a low-frequency high electric field radiation testing device, system and method, thereby overcoming one or more problems caused by the limitations and defects of the related art at least to a certain extent.

[0008] In a first aspect, the present application provides a low-frequency high electric field radiation testing device, comprising:

[0009] An input terminal for transmitting electromagnetic signals;

[0010] A load end, for receiving electromagnetic signals;

[0011] A bracket, disposed between the input end and the load end;

[0012] A transmission line group, whose two ends are respectively connected to the input end and the load end, and whose middle part is erected on the bracket, is used to generate an electromagnetic field below when an electromagnetic signal is passed, and use the electromagnetic field as a test area; the transmission line group has multiple transmission lines, one end of each of the transmission lines is radially erected on the bracket with the input end or the load end as the center, and the middle part of each of the transmission lines is erected on the same horizontal plane with a preset spacing.

[0013] In a possible implementation manner, the characteristic impedance of the load end is equal to the characteristic impedance of the transmission line.

[0014] In a possible implementation manner, the input end, the bracket, and the load end are all disposed on a ground plane.

[0015] In a second aspect, the present application provides a low-frequency high electric field radiation test system, comprising: a signal generator group, a radio frequency power amplifier group and the above-mentioned low-frequency high electric field radiation test device;

[0016] The signal generator group is connected to the radio frequency power amplifier group, and is used to generate an electromagnetic signal and send it to the radio frequency power amplifier group;

[0017] The RF power amplifier group and the transmission line test device are used to amplify the power of the electromagnetic signal and send it to the input end of the transmission line test device;

[0018] The transmission line testing device is used to generate an electromagnetic field after receiving an electromagnetic signal with amplified power, and use the electromagnetic field as a test area.

[0019] In a possible implementation, the transmission line testing device is located in an anechoic chamber.

[0020] In a possible implementation, the transmission line test system further includes: a power monitoring device connected to the RF power amplifier group and the device under test, and used to detect the electromagnetic signal power output by the RF power amplifier group and the operating power of the device under test.

[0021] In a possible implementation, the transmission line testing system further includes: an electric field monitoring device, configured to monitor the electromagnetic field strength of the test area by means of an electric field sensor disposed in the test area.

[0022] In a possible implementation, the transmission line test system further includes: a main control computer connected to the power monitoring device and the electric field monitoring device, and used to receive and display the electromagnetic signal power output by the RF power amplifier group, the operating power of the device to be tested, and the electromagnetic field strength of the test area.

[0023] In a possible implementation manner, the main control computer is also connected to the signal generator group and the radio frequency power amplifier group, and is used to control the operating parameters of the signal generator group and the radio frequency power amplifier group.

[0024] In a third aspect, the present application provides a low-frequency high electric field radiation testing method, using the above-mentioned low-frequency high electric field radiation testing system, including:

[0025] Determine adjustment parameters according to test requirements, wherein the adjustment parameters include the frequency range, field strength requirements and test area size of the high-intensity radiation field test;

[0026] According to the adjustment parameters, a signal generator group and a radio frequency power amplifier group are selected, and the radio frequency signal source, the power amplifier and the transmission line test device are connected in sequence;

[0027] Placing the device under test in the test area, starting the signal generator group and the radio frequency power amplifier group, so that the electromagnetic signal passes through the transmission line test device to form a high-intensity electromagnetic field in the test area;

[0028] The performance parameters and working status of the equipment to be tested and the test area are monitored by the power monitoring device and the electric field monitoring device, and the working parameters of the signal generator group and the radio frequency power amplifier group are controlled by the main control computer.

[0029] The technical solution provided by this application may have the following beneficial effects:

[0030] Through the low-frequency high electric field radiation test device, system and method of the present application, a test area can be established by utilizing a special installation method of the transmission line, thereby achieving high uniformity of the radiation field in the test area, and the field strength non-uniformity can be controlled within ±3dB. In addition, a wider frequency coverage range of 10kHz-100MHz can be achieved, and multi-band HIRF tests can be completed without frequent equipment replacement.

[0031] At the same time, the transmission line test device of the present application has a simple structure and can be easily installed and debugged. It does not require complicated antenna direction and polarization adjustments, which greatly shortens the test preparation time and improves the test efficiency. In addition, the transmission line test device has a low construction cost, occupies a small space, and has a relatively simple maintenance and calibration process, which can greatly reduce procurement costs, site costs, and maintenance costs.

[0032] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0034] Figure 1 A schematic structural diagram of a low-frequency high electric field radiation testing device in an exemplary embodiment of the present disclosure is shown;

[0035] Figure 2 A schematic diagram showing a top view of a low-frequency high electric field radiation testing device in an exemplary embodiment of the present disclosure is shown;

[0036] Figure 3 A schematic diagram showing the side view of the structure of a low-frequency high electric field radiation test device in an exemplary embodiment of the present disclosure is shown;

[0037] Figure 4 A schematic diagram showing the structure of a low-frequency high electric field radiation test system in an exemplary embodiment of the present disclosure is shown;

[0038] Figure 5 A schematic flow chart of a low-frequency high electric field radiation testing method in an exemplary embodiment of the present disclosure is shown.

[0039] Reference numerals:

[0040] 100, input end; 200, bracket; 300, load end; 400, transmission line group; 500, ground plane; 600, test area; 700, device under test; 800, radio wave dark box; 900, electric field sensor. DETAILED DESCRIPTION

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0042] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0043] In this example implementation, a low-frequency high electric field radiation test device is first provided. Figure 1-3 As shown in , the low-frequency high electric field radiation test device includes an input terminal 100, a load terminal 300, a bracket 200 and a transmission line group 400. The input terminal 100 is used to transmit electromagnetic signals; the load terminal 300 is used to receive electromagnetic signals; the bracket 200 is arranged between the input terminal 100 and the load terminal 300; the transmission line group 400 has two ends connected to the input terminal 100 and the load terminal 300 respectively, and the middle part is erected on the bracket 200, and is used to generate an electromagnetic field below when an electromagnetic signal is passed, and the electromagnetic field is used as a test area 600; the transmission line group 400 has a plurality of transmission lines, one end of each of the transmission lines is radially erected on the bracket 200 with the input terminal 100 or the load terminal 300 as the center, and the middle part of each of the transmission lines is erected on the same horizontal plane with a preset spacing.

[0044] The above-mentioned low-frequency high electric field radiation test device can realize a highly uniform radiation field in the test area through the network structure of the transmission line, and the field strength non-uniformity can be controlled within ±3dB. Compared with the traditional antenna radiation method, it can more accurately evaluate the performance of the test equipment in the HIRF environment and avoid misjudgment caused by non-uniform field strength.

[0045] Secondly, by adjusting the input electromagnetic signal frequency, a wider frequency coverage range of 10kHz-100MHz can be achieved, and multi-band HIRF tests can be completed without frequent equipment replacement. The traditional antenna radiation law requires 2 or even 3 antennas to cover 10kHz-100MHz, which saves test time and meets the test requirements of modern complex equipment for HIRF anti-interference capabilities in different frequency bands;

[0046] Thirdly, the network structure of the transmission line can also achieve a larger available test area range, which can be used to test large-sized devices under test. The traditional radiating antenna method is limited by the narrow antenna lobe range. When facing large-sized devices under test, it is necessary to change multiple positions and conduct several tests to complete; finally, by adjusting the transmission line length and frequency, the reverse power can be almost 0 during the HIRF test, with a good standing wave ratio, thereby improving the field strength. The traditional radiating antenna method has a large standing wave in the low frequency band. Under the same input power, the structure of the transmission line test device can achieve a maximum radiation field strength of 500V / m in the test area, while the traditional radiating antenna method can only reach 200V / m in the low frequency range of 10kHz-100MHz. When encountering a large-sized device under test, the reverse power is too large, resulting in abnormal alarm of the power amplifier, which is easy to damage the power amplifier.

[0047] It should be noted that if Figure 2 As shown, both ends of each transmission line are connected to the input end 100 and the load end 300, and the middle part of the transmission line is mounted on the bracket 200, arranged according to a preset spacing and located on the same horizontal plane, as shown in FIG. Figure 3 As shown, at one side angle of the input end 100 or the load end 300, the transmission lines are arranged radially.

[0048] Optionally, the ratio of the distance between the input end 100 and the load end 300, the distance between the middle of the farthest transmission line and the height of the bracket 200 is 9:5:1.

[0049] It is understandable that the electric field strength can reach its maximum value at the antinode of the standing wave. By adjusting the signal frequency and the length of the transmission line, the transmission line is in a standing wave state, thereby increasing the field strength. In addition, an insulating medium with a high dielectric constant is selected. According to the electric field energy formula We = 0.5E ^2 (In a homogeneous medium), a high dielectric constant medium can increase the electric field energy storage and help to increase the electric field strength in the transmission line.

[0050] In one embodiment, the transmission line length L and the signal frequency f satisfy a first formula, which is f=n*0.5*v / L, where n is the order of the standing wave mode and v is the wave velocity, which can make the transmission line in a standing wave state, thereby increasing the field strength.

[0051] In one embodiment, the characteristic impedance of the load end 300 is equal to the characteristic impedance of the transmission line.

[0052] When the characteristic impedance of the load end 300 is equal to the characteristic impedance of the transmission line, there is no reflected wave on the transmission line and the energy can be effectively absorbed by the load. If they are not matched, reflected waves will be generated, affecting the field strength distribution.

[0053] Optionally, the characteristic impedance of the load end 300 and the characteristic impedance of the transmission line are both 50 ohms. A transmission line with a 50 ohm load can effectively reduce the leakage of electromagnetic energy and make the electromagnetic energy more concentrated on the transmission line.

[0054] In one embodiment, the input end 100 , the bracket 200 , and the load end 300 are all disposed on a ground plane 500 , and the ground plane 500 is used to ensure the working safety of the transmission line testing device.

[0055] Furthermore, this exemplary embodiment also provides a low-frequency high electric field radiation test system, referring to Figure 4 As shown in , the low-frequency high electric field radiation test system includes a signal generator group, a radio frequency power amplifier group and the above-mentioned low-frequency high electric field radiation test device. The signal generator group is connected to the radio frequency power amplifier group to generate an electromagnetic signal and send it to the radio frequency power amplifier group; the radio frequency power amplifier group and the transmission line test device are used to amplify the power of the electromagnetic signal and send it to the input end 100 of the transmission line test device; the transmission line test device is used to generate an electromagnetic field after receiving the electromagnetic signal with amplified power, and use the electromagnetic field as the test area 600.

[0056] It should be noted that the signal generator group is used as a radio frequency signal source to generate an electromagnetic signal, and the radio frequency power amplifier group amplifies the power of the electromagnetic signal, thereby achieving the effect of improving the field strength in the test area 600.

[0057] In one embodiment, the transmission line testing device is located in an anechoic chamber 800 .

[0058] It should be noted that the radio wave dark box is a closed electromagnetic shielding space, which can effectively shield external electromagnetic interference signals. In the actual electromagnetic environment, there are various electromagnetic signals, such as radio station signals, wireless communication signals, electromagnetic noise generated by industrial equipment, etc. These external interference signals may affect the accuracy of the electromagnetic compatibility test. By shielding the external electromagnetic interference signals, the accuracy of the electromagnetic compatibility test results is ensured.

[0059] In one embodiment, the transmission line test system further includes: a power monitoring device connected to the RF power amplifier group and the device under test 700, for detecting the electromagnetic signal power output by the RF power amplifier group and the working power of the device under test.

[0060] It should be noted that by monitoring the electromagnetic signal power output by the RF power amplifier group and the working power of the device under test, the working status of the RF power amplifier group and the device under test can be monitored.

[0061] Furthermore, the transmission line testing system further includes: an electric field monitoring device for monitoring the electromagnetic field strength of the test area 600 via an electric field sensor 900 disposed in the test area 600 .

[0062] It should be noted that by monitoring the electromagnetic field strength in the test area 600, the working state of the device under test under a preset electric field strength can be obtained, and the RF power amplifier group can be adjusted by monitoring the electromagnetic field strength to adjust the actual electromagnetic field strength.

[0063] Furthermore, the transmission line testing system also includes: a main control computer, connected to the power monitoring device and the electric field monitoring device, for receiving and displaying the electromagnetic signal power output by the RF power amplifier group, the operating power of the device under test and the electromagnetic field strength of the test area 600.

[0064] It should be noted that the electromagnetic signal power output by the RF power amplifier group, the working power of the device under test and the electromagnetic field strength of the test area 600 are received and displayed by the main control computer, which is convenient for the test personnel to monitor the test process.

[0065] Furthermore, the main control computer is also connected to the signal generator group and the radio frequency power amplifier group, and is used to control the working parameters of the signal generator group and the radio frequency power amplifier group.

[0066] It should be noted that the main control computer can receive and control the operating parameters of the signal generator group and the radio frequency power amplifier group, and can control the transmission line test system.

[0067] Furthermore, this example embodiment also provides a low-frequency high electric field radiation test method, referring to Figure 5As shown in, the low-frequency high electric field radiation test method includes S100, determining the adjustment parameters according to the test requirements, and the adjustment parameters include the frequency range, field strength requirements and test area size of the HIRF test. S200, according to the adjustment parameters, select the signal generator group and the radio frequency power amplifier group, and connect the radio frequency signal source, the power amplifier and the transmission line test device in sequence. S300, place the device to be tested in the test area, start the signal generator group and the radio frequency power amplifier group, so that the electromagnetic signal forms a high-intensity electromagnetic field in the test area through the transmission line test device. S400, monitor the performance parameters and working status of the device to be tested and the test area through the power monitoring device and the electric field monitoring device, and control the working parameters of the signal generator group and the radio frequency power amplifier group through the main control computer.

[0068] Optionally, the bracket 200 is 1.8 m high and 9 m wide, the distance between the input terminal 100 and the load terminal 300 is 5 m, the test frequency range is 10 kHz–100 MHz, and the field strength requirement is 500 V / m;

[0069] Select a signal generator group with an adjustable frequency range of 10kHz–100MHz, and an RF power amplifier group with a gain of 50dB and a maximum output power of 3.5kW;

[0070] Connect the input end 100, the transmission line group 400 of 50 transmission lines and the 50Ω load end 300 in sequence, and then use a bracket to erect the 50 transmission lines from the middle, with a height of 1.8m and a spacing of 10cm between each transmission line;

[0071] The signal generator group is connected to the RF power amplifier group, and the RF power amplifier group is connected to the input terminal 100. After the signal generator group is turned on, the test area formed has a length of 2m, a width of 1.5m, and a height of 1m. The distance from the input terminal of the transmission line is 1m, the distance from the load terminal of the transmission line is 2.5m, and the distance from the outermost transmission line is 80cm.

[0072] The above transmission line test system was used to conduct HIRF tests on a certain type of avionics equipment. The field strength was measured at multiple points in the test area using a field strength measurement probe. The results showed that the field strength unevenness was within the range of ±3dB, meeting the test requirements. During the test, the working status of the equipment at different frequencies and field strengths was effectively monitored, and the test results accurately reflected the performance of the equipment in a HIRF environment. Compared with similar tests conducted using traditional antenna radiation methods, the test time was shortened by about 50%, the equipment procurement cost was reduced by about 30%, and the site rental cost was reduced by about 40%.

[0073] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0074] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0075] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0076] In the present disclosure, unless otherwise expressly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0078] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A low-frequency high electric field radiation test device, characterized in that: include: An input terminal for transmitting electromagnetic signals; A load end, for receiving electromagnetic signals; A bracket, disposed between the input end and the load end; A transmission line group, whose two ends are respectively connected to the input end and the load end, and whose middle part is erected on the bracket, is used to generate an electromagnetic field below when an electromagnetic signal is passed, and use the electromagnetic field as a test area; the transmission line group has multiple transmission lines, one end of each of the transmission lines is radially erected on the bracket with the input end or the load end as the center, and the middle part of each of the transmission lines is erected on the same horizontal plane with a preset spacing.

2. The low-frequency high electric field radiation testing device according to claim 1, characterized in that: The characteristic impedance of the load end is equal to the characteristic impedance of the transmission line.

3. The low-frequency high electric field radiation testing device according to claim 1, characterized in that: The input end, the bracket and the load end are all arranged on a ground plane.

4. A low frequency high electric field radiation test system, characterized in that: include: A signal generator group, a radio frequency power amplifier group and a low-frequency high electric field radiation test device as described in any one of claims 1 to 3; The signal generator group is connected to the radio frequency power amplifier group, and is used to generate an electromagnetic signal and send it to the radio frequency power amplifier group; The RF power amplifier group and the transmission line test device are used to amplify the power of the electromagnetic signal and send it to the input end of the transmission line test device; The transmission line testing device is used to generate an electromagnetic field after receiving an electromagnetic signal with amplified power, and use the electromagnetic field as a test area.

5. The low-frequency high electric field radiation test system according to claim 4, characterized in that: The transmission line testing device is located in an electric wave dark box.

6. The low-frequency high electric field radiation test system according to claim 5, characterized in that: Also includes: A power monitoring device is connected to the radio frequency power amplifier group and the device under test, and is used to detect the electromagnetic signal power output by the radio frequency power amplifier group and the working power of the device under test.

7. The low-frequency high electric field radiation test system according to claim 6, characterized in that: Also includes: The electric field monitoring device is used to monitor the electromagnetic field strength of the test area through an electric field sensor arranged in the test area.

8. The low-frequency high electric field radiation test system according to claim 7, characterized in that: Also includes: A main control computer is connected to the power monitoring device and the electric field monitoring device, and is used to receive and display the electromagnetic signal power output by the radio frequency power amplifier group, the working power of the device to be tested, and the electromagnetic field strength of the test area.

9. The low-frequency high electric field radiation test system according to claim 6, characterized in that: The main control computer is also connected to the signal generator group and the radio frequency power amplifier group, and is used to control the working parameters of the signal generator group and the radio frequency power amplifier group.

10. A low-frequency high electric field radiation testing method, characterized in that: The low-frequency high electric field radiation test system according to any one of claims 4 to 9 comprises: Determine adjustment parameters according to test requirements, wherein the adjustment parameters include the frequency range, field strength requirements and test area size of the high-intensity radiation field test; According to the adjustment parameters, a signal generator group and a radio frequency power amplifier group are selected, and the radio frequency signal source, the power amplifier and the transmission line test device are connected in sequence; Placing the device under test in the test area, starting the signal generator group and the radio frequency power amplifier group, so that the electromagnetic signal passes through the transmission line test device to form a high-intensity electromagnetic field in the test area; The performance parameters and working status of the equipment to be tested and the test area are monitored by the power monitoring device and the electric field monitoring device, and the working parameters of the signal generator group and the radio frequency power amplifier group are controlled by the main control computer.

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