Electromagnetic compatibility radiation emission broadband verification system and method

Abstract

The present invention relates to the technical field of electromagnetic compatibility radiation emission testing, and discloses a broadband period verification system and method for electromagnetic compatibility radiation emission, comprising: a signal generating module generating a radio frequency signal; a transmitting module connected to the signal generating module to transmit the radio frequency signal; an antenna direction control module connected to the transmitting module to control the direction of the transmitting module when transmitting the radio frequency signal; a receiving module receiving the radio frequency signal; a compensation factor module connected to the signal generating module, the transmitting module, and the receiving module respectively, and calculating the compensation factor in real time based on the direction of the transmitting module when transmitting the radio frequency signal, the radio frequency signal generated by the signal generating module, and the radio frequency signal received by the receiving module; when the real-time calculated compensation factor meets a preset condition, the period verification is completed. The present invention can achieve efficient period verification within a wider frequency band.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic compatibility radiation emission testing, and in particular to a system and method for verifying electromagnetic compatibility radiation emission over a wide bandwidth. Background Art

[0002] Intermediate checks are checks performed between calibrations to maintain confidence in the equipment's operating status. Electromagnetic compatibility (EMC) testing is a comprehensive assessment of the electromagnetic interference (EMI) and interference immunity (EMS) of electronic products and is one of the most important indicators of product quality. Radiated emission testing is a type of EMC testing, but existing test equipment used for intermediate checks of radiated emission tests typically only supports checks within a narrow frequency band. Checks in different frequency bands require different test equipment, resulting in low efficiency and significant uncertainty in test results due to the equipment's influence. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a system and method for broadband period verification of electromagnetic compatibility radiation emissions, which can achieve efficient period verification within a wider frequency band.

[0004] To solve the above technical problems, the present invention provides an electromagnetic compatibility radiation emission broadband verification system, comprising:

[0005] A signal generating module generates a radio frequency signal;

[0006] A transmitting module, connected to the signal generating module, transmitting the radio frequency signal;

[0007] an antenna direction control module, connected to the transmitting module, and controlling the direction in which the transmitting module transmits the radio frequency signal;

[0008] A receiving module, receiving the radio frequency signal;

[0009] a compensation factor module, connected to the signal generating module, the transmitting module, and the receiving module, respectively, and calculating the compensation factor in real time based on the direction of the radio frequency signal transmitted by the transmitting module, the radio frequency signal generated by the signal generating module, and the radio frequency signal received by the receiving module;

[0010] The compensation factor calculated in real time is compared with the preset conditions to achieve period verification.

[0011] In one embodiment of the present invention, the radio frequency signal includes a fixed-frequency radio frequency signal, a Gaussian white noise signal, and a pulse radiation signal, and the frequency range of the radio frequency signal is 30 MHz-40 GHz.

[0012] In one embodiment of the present invention, the receiving module includes a receiving antenna and a receiver, wherein the receiving antenna receives the radio frequency signal and transmits it to the compensation factor module through the receiver;

[0013] The calculation method of the compensation factor is:

[0014]

[0015] Among them, F f represents the compensation factor, U r Indicates the level value received by the receiver. Denotes the measurement uncertainty of the receiver, U s Indicates the level value generated by the signal generation module. Represents the uncertainty of the signal generation module, G e represents the antenna gain of the transmitting antenna, represents the uncertainty of the antenna gain of the transmitting antenna, F D represents the receiving antenna factor, represents the uncertainty of the receiving antenna factor, ΔH represents the height error factor of the receiving antenna, L f represents the RF cable loss between the receiver and the receiving antenna, Δ θ Indicates a correction coefficient for the pitch angle, where the pitch angle is the angle between the transmitting module and the receiving antenna when transmitting the RF signal.

[0016] In one embodiment of the present invention, the magnitude of the pitch angle is controlled by the antenna direction control module, and the setting condition satisfied by the pitch angle is:

[0017]

[0018] Wherein, θ represents the pitch angle, H represents the height of the transmitting module, L represents the horizontal distance between the receiving antenna and the transmitting module, N is a positive integer, c is the speed of light, and f is the frequency of the radio frequency signal;

[0019] When the pitch angle meets the setting conditions, Δ θ =1.

[0020] In one embodiment of the present invention, a test result display and comparison module is further included, and the test result display and comparison module is connected to the signal generation module, the receiving module, and the compensation factor module;

[0021] The test result display and comparison module includes a prompt unit and a display unit. The display unit displays in real time the radio frequency signal data generated by the signal generating module, the radio frequency signal data received by the receiving module, the compensation factor calculated by the compensation factor module, and the preset conditions of the compensation factor. The prompt unit issues a prompt when the compensation factor calculated by the compensation factor module does not meet the preset conditions of the compensation factor.

[0022] In one embodiment of the present invention, the transmitting module further includes a radio frequency adapter, the compensation factor module includes a compensation factor module radio frequency output port, a comparison input port, and a comparison output port, and the receiving module includes a receiver;

[0023] The RF output port of the compensation factor module is connected to the RF adapter, the comparison input port is connected to the receiver, and the comparison output port is connected to the test result display and comparison module.

[0024] In one embodiment of the present invention, the present invention further comprises a housing, wherein the generating module, the antenna direction control module, the receiving module, and the compensation factor module are arranged in the housing, and a shielding layer is provided on the surface of the signal generating module, the transmitting module, the antenna direction control module, the receiving module, and the compensation factor module, and the modules are connected by shielded wires;

[0025] The receiving module is arranged outside the shell. The shell is provided with a waveguide hole. The transmitting module extends out of the shell through the waveguide hole.

[0026] In one embodiment of the present invention, the invention further comprises a housing, wherein the transmitting module comprises a transmitting antenna, and the radio frequency signal is transmitted via the transmitting antenna;

[0027] The antenna direction control module includes a transmitting antenna bracket, a first ultrasonic motor arranged in the housing, a first connecting rod, a second ultrasonic motor, and a second connecting rod.

[0028] The first connecting rod is rotatably connected to the shell through the first ultrasonic motor, one end of the second connecting rod is rotatably connected to the first connecting rod through the second ultrasonic motor, the transmitting antenna bracket is fixed to the end of the second connecting rod away from the first connecting rod, the transmitting antenna is fixed to the transmitting antenna bracket, and the transmitting antenna is arranged outside the shell.

[0029] In one embodiment of the present invention, the device further comprises a control keyboard and a housing, wherein the control keyboard is arranged outside the housing, and the control keyboard is connected to the signal generating module, the transmitting module, the antenna direction control module, the receiving module, and the compensation factor module to control parameter settings of each module;

[0030] The control keyboard includes a keyboard body, a shielding cover, a hinge, and a shielding strip. When the control keyboard is arranged outside the shell, the shielding strip is provided at the contact point with the shell. The shielding cover moves on the keyboard body under the action of the hinge.

[0031] The present invention also provides a method for electromagnetic compatibility radiation emission broadband period verification, in which the signal generating module, transmitting module, antenna direction control module, receiving module, and compensation factor module in the electromagnetic compatibility radiation emission broadband period verification system are set in an anechoic chamber, and the compensation factor calculated in real time by the compensation factor module is obtained and compared with the preset conditions to implement period verification. When the compensation factor calculated in real time meets the preset conditions, the period verification is completed.

[0032] The above technical solution of the present invention has the following advantages over the prior art:

[0033] The present invention can quickly complete period verification through real-time calculation of the compensation factor, solving the problem of needing to replace different test equipment and repeatedly set up the verification environment during traditional period verification, thereby improving the efficiency of verification during detection; moreover, the present invention can realize verification during detection within a wider frequency band with high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0035] Figure 1 It is a schematic diagram of the module structure of the present invention.

[0036] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0037] Figure 3 It is a schematic diagram of the external structure of the present invention.

[0038] Figure 4 It is a schematic diagram of the pitch angle θ in the present invention.

[0039] Figure 5 3. This is a diagram showing the corresponding relationship between the path difference and the angle when the test distance is 3 meters in an embodiment of the present invention.

[0040] Figure 6 1 is a diagram showing the corresponding relationship between the path difference and the angle when the test distance is 10 meters in an embodiment of the present invention.

[0041] Figure 7 The figure is a schematic diagram of the arrangement when the present invention is used to perform electromagnetic compatibility radiation emission verification.

[0042] Explanation of the reference numerals in the specification: 1. Signal generating module; 101. RF output port of the signal generating module; 102. Remote control port; 2. Transmitting module; 201. Transmitting antenna; 202. RF adapter; 3. Antenna direction control module; 301. Transmitting antenna bracket; 302. First ultrasonic motor; 303. First connecting rod; 304. Second ultrasonic motor; 305. Second connecting rod; 306. Horizontal marker; 307. Vertical marker; 4. Receiving module; 401. Receiving antenna; 402. Receiver; 5. Compensation factor Module; 501, compensation factor module RF signal input port; 502, signal source control port; 503, compensation factor module RF output port; 504, comparison input port; 505, comparison output port; 506, keyboard control port; 6, test result display comparison module; 601, red light; 602, green light; 603, display unit; 7, waveguide hole; 8, housing; 9, control keyboard; 901, keyboard body; 902, shielding cover; 903, hinge; 904, shielding strip; 10, radio wave darkroom; 11, universal interface bus. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0044] Example 1

[0045] Reference Figure 1-Figure 3 As shown, the present invention discloses an electromagnetic compatibility radiation emission broadband verification system, comprising a signal generating module 1, a transmitting module 2, an antenna direction control module 3, a receiving module 4 and a compensation factor module 5. The signal generating module 1 generates a radio frequency signal. The transmitting module 2 is connected to the signal generating module 1 and transmits a radio frequency signal. The antenna direction control module 3 is connected to the transmitting module 2 to control the direction in which the transmitting module 2 transmits the radio frequency signal. The receiving module 4 receives the radio frequency signal. The compensation factor module 5 is respectively connected to the signal generating module 1, the transmitting module 2 and the receiving module 4, and calculates the compensation factor in real time based on the direction in which the transmitting module 2 transmits the radio frequency signal, the radio frequency signal generated by the signal generating module 1 and the radio frequency signal received by the receiving module 4.

[0046] Before conducting a periodic check, key RF equipment must undergo a self-calibration process to ensure high reliability. After initiating the periodic check, a frequency sweep is used to rapidly perform the check in the frequency domain. The periodic check is completed when the real-time calculated compensation factor meets the preset conditions. This reduces the time required for a single point during the periodic check to just a few seconds, compared to at least a minute using conventional periodic check methods, which typically require a single point (including result calculation time).

[0047] In this embodiment, the signal generating module 1 includes a radio frequency signal generator, a signal generating module radio frequency output port 101, and a remote control port 102. The compensation factor module 5 includes a compensation factor module radio frequency signal input port 501 and a signal source control port 502. The radio frequency signal generator generates different radio frequency signals, including different analog signals such as fixed-frequency radio frequency signals, Gaussian white noise (WGN) signals, and pulse radiation signals. The frequency range of the radio frequency signal is 30MHz-40GHz. The signal generating module radio frequency output port 101 is connected to the compensation factor module radio frequency signal input port 501. The radio frequency signal is input to the compensation factor module radio frequency signal input port 501 through the signal generating module radio frequency output port 101. The signal source control port 502 is connected to the remote control port 102 via a control line.

[0048] In this embodiment, the receiving module 4 includes a receiving antenna 401 and a receiver 402. The receiving antenna 401 receives the radio frequency signal and transmits it to the compensation factor module 5 through the receiver 402. The compensation factor is calculated as follows:

[0049]

[0050] Among them, F f represents the compensation factor, U R represents the level value received by the receiver 402 in the receiving module 4, Indicates the measurement uncertainty of the receiver, which can be obtained from the receiver calibration report; U s Indicates the level value generated by signal generating module 1, represents the uncertainty of signal generation module 1, The value of is determined by the signal generating module 1 itself and is a known value during calculation; e represents the antenna gain of the transmitting antenna 201, represents the uncertainty of the antenna gain of the transmitting antenna 201, which is a known value during calculation and can be obtained from the antenna calibration report; D Indicates the receiving antenna 401 factor, F D The value of is obtained by calibrating the test distance and the calibration frequency when the receiving antenna 401 receives the radio frequency signal, and can be the multiplication or division of the two; represents the uncertainty of the receiving antenna 401 factor, The value of is determined by the receiving antenna 401 itself and is a known value during calculation, which can be obtained from the antenna calibration report; ΔH is the height error influencing factor of the receiving antenna 401, and the value of ΔH is calculated based on the height of the receiving antenna 401 compared to the transmitting module 2, which can be the multiplication or division of the two; L f represents the RF cable loss between the receiver 402 and the receiving antenna 401, L fThe value of is calculated based on the calibration frequency, which can be calculated using traditional cable loss; Δ θ The pitch angle is the angle between the transmitting module 2 and the receiving antenna 401 when transmitting radio frequency signals.

[0051] In this embodiment, the size of the pitch angle is controlled by the antenna direction control module 3. The antenna direction control module 3 can quickly adjust the pitch angle to the angle corresponding to the maximum value of the radiation emission, eliminating the need for uniform scanning in height to find the maximum value in the traditional method. While improving the angle setting accuracy, it reduces the time for setting the angle and improves the efficiency of verification during the period.

[0052] The pitch angle needs to be set to the angle corresponding to the maximum radiation emission, such as Figure 4 As shown in the figure, assuming that the RF signal is an ideal plane wave, the metal ground reflection path in the detection room is an ideal reflection, and the reflection angle is equal to the incident angle, the direct path electromagnetic field strength formula is:

[0053]

[0054] The formula for the electromagnetic field strength through the floor emission path is:

[0055]

[0056] Among them, E(t1) and E(t2) are the functions of the electromagnetic field strength on the two paths changing with time t1 and t2, E1 and E2 are the field strengths on the two paths, ω = 1 / f, f is the frequency of the RF signal, kz is the offset, is the initial phase.

[0057] Assuming that the initial phase of the electromagnetic field is 0 and there is only one directional component, the formula for the electromagnetic field strength on the two paths can be simplified as follows:

[0058] E(t1)=E1cos(ωt1-kz),

[0059] E(t2)=E2cos(ωt2-kz);

[0060] The maximum modulus of the complex vector combination of the two electromagnetic fields occurs when the phases are the same, so ωt2-ωt1=2π.N, that is, the path difference between the two propagation paths At this time, the setting conditions that the pitch angle satisfies are:

[0061]

[0062] Wherein, θ represents the pitch angle. In this embodiment, the transmitting module 2 includes a transmitting antenna 201, and the radio frequency signal is transmitted through the transmitting antenna 201. H represents the height of the transmitting antenna 201 in the transmitting module 2. The height of the transmitting antenna 201 is set according to actual conditions and is set to 1 meter in this embodiment. L represents the horizontal distance between the receiving antenna 401 and the transmitting antenna 201 in the transmitting module 2. The horizontal distance is set according to actual conditions and is set to 3 meters and 10 meters in this embodiment. N is a positive integer, c is the speed of light, and f is the frequency of the radio frequency signal. When the pitch angle meets the setting conditions, Δ θ =1.

[0063] Since the typical transmission antenna 201 tower height is 1 to 4 meters, the value range of θ for a 3-meter test distance can be [0°, 45°]; for a 10-meter test distance, the value range of θ can be [0°, 16.7°]. Values of θ within this range are optional during the actual verification process.

[0064] During the actual period verification process, the calculation of the θ value can be done by using the formula The preset is realized in the program, and the value range of θ can also be quickly obtained by querying the corresponding relationship diagram or corresponding relationship table based on the corresponding relationship between the wave path difference D2-D1 (unit: meter) and the angle θ (unit: degree) at the tower height of the conventional transmitting antenna 201. Figure 5 The figure shows the corresponding relationship between the path difference d2-D1 and the angle θ when the test distance is 3 meters. Figure 6 The figure shows the relationship between the path difference D2-D1 and the angle θ when the test distance is 10 meters. After obtaining the optional θ value, the antenna direction control module 3 can quickly adjust the pitch angle, which can speed up the verification process, thereby improving the efficiency of laboratory testing and increasing economic benefits.

[0065] This embodiment further includes a test result display and comparison module 6, which is connected to the signal generation module 1, the receiving module 4, and the compensation factor module 5. The test result display and comparison module 6 includes a prompt unit and a display unit 603. The display unit 603 displays in real time the RF signal data generated by the signal generation module 1, the RF signal data received by the receiving module 4, the compensation factor calculated by the compensation factor module 5, and the preset conditions of the compensation factor.

[0066] The prompt unit issues a prompt when the compensation factor calculated by the compensation factor module 5 does not meet the preset conditions. In this embodiment, specifically: a deviation threshold is set, typically using the measurement uncertainty of the radiation emission project, such as ±5dB; when the difference between the compensation factor calculated in real time by the compensation factor module 5 and the theoretical calculated value of the compensation factor is within the deviation threshold, the compensation factor is considered to meet the preset conditions of the compensation factor; when the difference between the compensation factor calculated in real time by the compensation factor module 5 and the theoretical value of the compensation factor exceeds the deviation threshold, the compensation factor is considered to not meet the preset conditions of the compensation factor, and the prompt unit issues a prompt. The test result display and comparison module 6 displays the transmitted and received RF signal data, as well as the actual and theoretical values of the compensation factor in real time, so that the period verification results can be quickly and intuitively obtained, improving efficiency.

[0067] In this embodiment, the display unit 603 can be a display screen, a digital tube, etc., and the prompt unit is designed as a red light 601 and a green light 602. If the difference between the compensation factor calculated in real time and the theoretical value of the compensation factor is within the deviation threshold, the green light 602 is lit, indicating that the electromagnetic compatibility radiation emission system is working normally and has passed the current period verification, and subsequent radiation tests can continue; if the difference between the compensation factor calculated in real time and the theoretical value of the compensation factor exceeds the deviation threshold, the red light 601 is lit, indicating that the electromagnetic compatibility radiation emission system has failed the period verification. At this time, there is a problem with the electromagnetic compatibility radiation emission system, and the radiation emission test cannot continue. The test needs to be suspended to repair the radiation emission system.

[0068] In this embodiment, the transmitting module 2 also includes an RF adapter 202, the compensation factor module 5 includes a compensation factor module RF output port 503, a comparison input port 504, and a comparison output port 505, and the receiving module 4 includes a receiver 402. The compensation factor module RF output port 503 is connected to the RF adapter 202, the comparison input port 504 extends out of the housing 8 through the waveguide hole 7 and is connected to the receiver 402, and the comparison output port 505 is connected to the test result display and comparison module 6.

[0069] This embodiment also includes a housing 8, within which the generating module, antenna direction control module 3, receiving module 4, and compensation factor module 5 are located. The signal generating module 1, transmitting module 2, antenna direction control module 3, receiving module 4, and compensation factor module 5 are provided with a shielding layer. In this embodiment, the shielding layer is made of metal material coated with an insulating protective layer. Shielded wires connect the modules to each other for signal transmission. The receiving module 4 is located outside the housing 8. The housing 8 is provided with a waveguide hole 7. The transmitting antenna 201, RF adapter 202, and transmitting antenna bracket 301 extend out of the housing 8 through the waveguide hole 7. The waveguide hole 7 is provided with a metal fleece-reinforced shield. The grounding plate is connected to the bottom surface and to the grounding plate of the entire test chamber.

[0070] In this embodiment, the transmitting module 2 includes a transmitting antenna 201, which transmits radio frequency signals. The antenna direction control module 3 includes a transmitting antenna bracket 301, a first ultrasonic motor 302 disposed within the housing 8, a first connecting rod 303, a second ultrasonic motor 304, and a second connecting rod 305. The first connecting rod 303 is rotatably connected to the housing 8 via the first ultrasonic motor 302, and one end of the second connecting rod 305 is rotatably connected to the first connecting rod 303 via the second ultrasonic motor 304. The transmitting antenna bracket 301 is fixed to the end of the second connecting rod 305 away from the first connecting rod 303. The transmitting antenna 201 is fixed to the transmitting antenna bracket 301, and the transmitting antenna 201 is disposed outside the housing 8.

[0071] The antenna direction control module 3 controls the vertical and horizontal transmission angles through the coordination of the first ultrasonic motor 302, the first connecting rod 303, the second ultrasonic motor 304, and the second connecting rod 305. Conventional electromagnetic motors generate radiation interference, which increases the impact of pulsed radiation emissions. This embodiment uses an ultrasonic motor, which does not use an electromagnetic field as a driving force and therefore produces low electromagnetic radiation. This can further reduce potential electromagnetic radiation interference, especially in higher frequency bands where low noise levels are crucial. Ultrasonic motors can effectively improve the accuracy of the period verification system.

[0072] The transmitting antenna bracket 301 can be replaced according to actual needs. Horizontal markers 306 and vertical markers 307 can also be set on the transmitting antenna bracket 301 to promptly confirm whether the horizontal and vertical directions are accurate, thereby improving the speed and accuracy of the direction control of the transmitting antenna 201.

[0073] In this embodiment, a control keyboard 9 is further included, which is arranged outside the housing 8. The control keyboard 9 is connected to the signal generating module 1, the transmitting module 2, the antenna direction control module 3, the receiving module 4, and the compensation factor module 5 and controls the parameter settings of each module; the compensation factor module 5 includes a keyboard control port 506, and the control keyboard 9 is connected to the compensation factor module 5 through the keyboard control port 506.

[0074] The control keyboard 9 comprises a keyboard body 901, a shielding cover 902, a metal hinge 903, and a shielding strip 904. When the control keyboard 9 is positioned outside the housing 8, the shielding strip 904 is removably positioned where it contacts the housing 8. In this embodiment, shielding strips 904 are positioned on all four sides of the keyboard body 901. The shielding cover 902 is secured to the keyboard body 901 by the metal hinge 903, enhancing shielding and preventing RF leakage. To set parameters, the shielding cover 902 is removed from the keyboard body 901 via the metal hinge 903. To perform a test after setting parameters, the shielding cover 902 is reattached to the keyboard body 901 via the metal hinge 903.

[0075] Example 2

[0076] The present invention also discloses a method for verifying electromagnetic compatibility radiation emission during broadband period, such as Figure 7 As shown, the signal generating module 1, the transmitting module 2, the antenna direction control module 3, the receiving antenna 401 in the receiving module 4, and the compensation factor module 5 in the electromagnetic compatibility radiation emission broadband period verification system in Example 1 are arranged in the radio wave darkroom 10, and the test result display and comparison module 6 and the receiver 402 in the receiving module 4 are arranged outside the radio wave darkroom 10. The receiver 402 outside the radio wave darkroom 10 is connected to the comparison input port 504 via the universal interface bus 11. The compensation factor calculated in real time by the compensation factor module 5 is observed outside the radio wave darkroom 10 through the test result display and comparison module 6 and compared with the preset conditions to realize period verification. When the real-time calculated compensation factor meets the preset conditions, the period verification is completed.

[0077] The present invention uses real-time calculation of compensation factors to rapidly complete inter-test verification, resolving the issues associated with traditional inter-test verification, such as the need to replace different test equipment and repeatedly set up the verification environment. This improves inter-test verification efficiency. Furthermore, through practical application, the present invention can achieve inter-test verification over a wide frequency band with high accuracy. This improves laboratory utilization efficiency and provides better quality monitoring for laboratory electromagnetic compatibility radiation testing.

[0078] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0079] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0080] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0081] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0082] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An electromagnetic compatibility radiation emission broadband verification system, characterized in that: include: A signal generating module generates a radio frequency signal; A transmitting module, connected to the signal generating module, transmitting the radio frequency signal; an antenna direction control module, connected to the transmitting module, and controlling the direction in which the transmitting module transmits the radio frequency signal; A receiving module, receiving the radio frequency signal; a compensation factor module, connected to the signal generating module, the transmitting module, and the receiving module, respectively, and calculating the compensation factor in real time based on the direction of the radio frequency signal transmitted by the transmitting module, the radio frequency signal generated by the signal generating module, and the radio frequency signal received by the receiving module; The compensation factor calculated in real time is compared with the preset conditions to achieve period verification.

2. The electromagnetic compatibility radiation emission broadband verification system according to claim 1, characterized in that: The radio frequency signal includes a fixed-frequency radio frequency signal, a Gaussian white noise signal, and a pulse radiation signal. The frequency range of the radio frequency signal is 30 MHz-40 GHz.

3. The electromagnetic compatibility radiation emission broadband verification system according to claim 1, characterized in that: The receiving module includes a receiving antenna and a receiver, wherein the receiving antenna receives the radio frequency signal and transmits it to the compensation factor module through the receiver; The calculation method of the compensation factor is: Among them, F f represents the compensation factor, U R Indicates the level value received by the receiver. Denotes the measurement uncertainty of the receiver, U s Indicates the level value generated by the signal generation module. Represents the uncertainty of the signal generation module, G e represents the antenna gain of the transmitting antenna, represents the uncertainty of the antenna gain of the transmitting antenna, F D represents the receiving antenna factor, represents the uncertainty of the receiving antenna factor, ΔH represents the height error factor of the receiving antenna, L f represents the RF cable loss between the receiver and the receiving antenna, Δ θ Indicates a correction coefficient for the pitch angle, where the pitch angle is the angle between the transmitting module and the receiving antenna when transmitting the RF signal.

4. The electromagnetic compatibility radiation emission broadband verification system according to claim 3, characterized in that: The magnitude of the pitch angle is controlled by the antenna direction control module, and the setting conditions satisfied by the pitch angle are: Wherein, θ represents the pitch angle, H represents the height of the transmitting module, L represents the horizontal distance between the receiving antenna and the transmitting module, N is a positive integer, c is the speed of light, and f is the frequency of the radio frequency signal; When the pitch angle meets the setting conditions, Δ θ =1.

5. The electromagnetic compatibility radiation emission broadband verification system according to claim 1, characterized in that: It also includes a test result display and comparison module, which is connected to the signal generation module, the receiving module, and the compensation factor module; The test result display and comparison module includes a prompt unit and a display unit. The display unit displays in real time the radio frequency signal data generated by the signal generating module, the radio frequency signal data received by the receiving module, the compensation factor calculated by the compensation factor module, and the preset conditions of the compensation factor. The prompt unit issues a prompt when the compensation factor calculated by the compensation factor module does not meet the preset conditions of the compensation factor.

6. The electromagnetic compatibility radiation emission broadband verification system according to claim 5, characterized in that: The transmitting module further includes a radio frequency adapter, the compensation factor module includes a compensation factor module radio frequency output port, a comparison input port, and a comparison output port, and the receiving module includes a receiver; The RF output port of the compensation factor module is connected to the RF adapter, the comparison input port is connected to the receiver, and the comparison output port is connected to the test result display and comparison module.

7. The electromagnetic compatibility radiation emission broadband verification system according to claim 1, characterized in that: It also includes a housing, wherein the generating module, the antenna direction control module, the receiving module, and the compensation factor module are arranged in the housing, and the surfaces of the signal generating module, the transmitting module, the antenna direction control module, the receiving module, and the compensation factor module are provided with a shielding layer, and the modules are connected by shielded wires; The receiving module is arranged outside the shell. The shell is provided with a waveguide hole. The transmitting module extends out of the shell through the waveguide hole.

8. The electromagnetic compatibility radiation emission broadband verification system according to claim 1, characterized in that: It also includes a housing, the transmitting module includes a transmitting antenna, and the radio frequency signal is transmitted through the transmitting antenna; The antenna direction control module includes a transmitting antenna bracket, a first ultrasonic motor arranged in the housing, a first connecting rod, a second ultrasonic motor, and a second connecting rod. The first connecting rod is rotatably connected to the shell through the first ultrasonic motor, one end of the second connecting rod is rotatably connected to the first connecting rod through the second ultrasonic motor, the transmitting antenna bracket is fixed to the end of the second connecting rod away from the first connecting rod, the transmitting antenna is fixed to the transmitting antenna bracket, and the transmitting antenna is arranged outside the shell.

9. The electromagnetic compatibility radiation emission broadband verification system according to any one of claims 1 to 8, characterized in that: It also includes a control keyboard and a housing, wherein the control keyboard is arranged outside the housing, and the control keyboard is connected to the signal generating module, the transmitting module, the antenna direction control module, the receiving module, and the compensation factor module to control the parameter settings of each module; The control keyboard includes a keyboard body, a shielding cover, a hinge, and a shielding strip. When the control keyboard is arranged outside the shell, the shielding strip is provided at the contact point with the shell. The shielding cover moves on the keyboard body under the action of the hinge.

10. A method for verifying electromagnetic compatibility radiation emission over a wide frequency range, characterized by: The signal generating module, transmitting module, antenna direction control module, receiving module and compensation factor module in the electromagnetic compatibility radiation emission broadband period verification system as described in any one of claims 1 to 9 are set in an anechoic chamber, the compensation factor calculated in real time by the compensation factor module is obtained and compared with the preset conditions to realize period verification, and the period verification is completed when the compensation factor calculated in real time meets the preset conditions.

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