A radiation immunity test device and method for communication equipment

Abstract

The present invention discloses a radiation immunity test device and method for communication equipment, which belongs to the technical field of radiation immunity test, and includes a power monitoring device, a control device, a first antenna group, a second antenna group and an information analysis device; the control device is used to generate a modulation signal, adjust the communication signal transmitted by the information analysis device to obtain a standard communication signal, and filter out the test signal transmitted by the second antenna group to obtain a standard test signal; the power monitoring device adjusts the modulation signal transmitted by the control device to obtain an interference signal; the information analysis device obtains a real communication signal, analyzes the standard test signal to obtain a test result; the first antenna group generates an interference electromagnetic field in an anechoic chamber based on the interference signal transmitted by the power monitoring device; the second antenna group adjusts the interference electromagnetic field based on the standard communication signal to obtain a test electromagnetic field, and obtains a test signal of a device to be tested in the test electromagnetic field; the present invention significantly improves the accuracy of the test by simulating a real electromagnetic field and filtering out clutter signals.

Description

Technical Field

[0001] The present invention relates to the technical field of radiation immunity testing, and in particular to a radiation immunity testing device and method for communication equipment. Background Art

[0002] With the development of intelligent power inspection, more and more monitoring equipment such as image monitoring devices, video monitoring devices, and drones are being used in the inspection process of transmission lines to perform real-time monitoring and fault diagnosis of transmission lines. The monitoring equipment usually operates in a complex electromagnetic environment with multiple electromagnetic interferences and multiple communication electromagnetic fields, and the monitoring equipment often uses wireless communication for data transmission. Therefore, the quality of the data transmission of the detection equipment is an important indicator of its performance. However, when using existing radiation spurious testing technology to test the radiation immunity of the detection equipment, the impact of radiation immunity on communication data transmission is usually not considered. All collected data is used as test data. The test data contains clutter signals introduced by radiation immunity, which makes the test data inaccurate, resulting in low accuracy of the corresponding test results. It may even be impossible to parse the data according to data specifications and protocols. In other words, the existing radiation spurious testing cannot examine the quality of wireless communication data transmission of the corresponding equipment. Alternatively, during the test, a signal source is set to simulate the real electromagnetic environment. However, the simulated signal has limited variation and can only change to a limited extent according to the set conditions. It is difficult to reflect the dynamic and random nature of the real electromagnetic environment, resulting in significant differences between the test data and the actual working data of the corresponding equipment, resulting in low accuracy of the corresponding test results.

[0003] Chinese patent, publication number: CN118130956B, publication date: June 4, 2024, discloses a hybrid test system compatible with radiation spurious and radiation immunity tests, including: an anechoic chamber, a turntable is provided in the middle of the anechoic chamber, a communication antenna is provided on one side of the turntable, a radio frequency switch 1 and a receiving antenna 1 are provided on the side of the anechoic chamber close to the communication antenna, a transceiver antenna is provided on one side of the turntable, and the antenna rack of the transceiver antenna is installed with a slide rail, and an RF switch 2 and a receiving antenna 2 are provided on the inner side of the anechoic chamber away from the communication antenna. The RF switch 1 and the RF switch 2 control the remote disconnection of the receiving antenna 1 and the receiving antenna 2 with the back-end equipment and perform impedance matching. The slide rail controls the transceiver antenna to move from the corresponding test position at the back end to the corresponding test position away from the center of the turntable; however, this invention only considers the interaction of wireless communication signals and the collection of spurious signals during the radiation spurious test, and the interaction of the wireless communication signals is separated from the radiation immunity test, that is, the communication collection work of wireless communication in the radiation immunity test is not considered. Summary of the Invention

[0004] The purpose of the present invention is to address the problem that when performing radiation immunity testing in the prior art, the collected test data contains clutter signals, and the test environment is difficult to simulate the dynamics and randomness of the real electromagnetic field, resulting in low detection accuracy; a radiation immunity testing device and method for communication equipment are proposed, which generates interference signals based on a control device and a power monitoring device, obtains a communication signal corresponding to the actual working condition of the equipment to be tested through an information analysis device, and simulates the real electromagnetic field in an anechoic chamber based on the interference signal and the communication signal to obtain a test electromagnetic field with dynamics and randomness, thereby realizing the radiation immunity testing of the equipment to be tested; and during the test process, the clutter signal in the test signal of the equipment to be tested is filtered out by the control device, so that the test signal becomes a standard test signal containing only key data, and the corresponding information analysis device parses the standard signal to obtain accurate test results, thereby significantly improving the accuracy of the test.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a radiation immunity testing device for communication equipment, the device comprising:

[0007] Power monitoring equipment installed in the power amplifier room, control equipment installed in the control room, first antenna group and second antenna group installed in the anechoic chamber, and information analysis equipment installed in the outdoor space;

[0008] The control device generates a modulation signal in response to the test instruction, adjusts the communication signal transmitted by the analysis device to obtain a standard communication signal, and filters the test signal transmitted by the second antenna group to obtain a standard test signal;

[0009] The power monitoring device adjusts the modulation signal transmitted by the control device to obtain an interference signal;

[0010] The information analysis device obtains the communication signal corresponding to the actual working condition of the device to be tested, and analyzes the standard test signal to obtain the test result;

[0011] The first antenna group generates an interfering electromagnetic field in the anechoic chamber based on an interference signal transmitted by the power monitoring device;

[0012] The second antenna group adjusts the interference electromagnetic field based on the standard communication signal to obtain a test electromagnetic field, and obtains a test signal of the device to be detected in the test electromagnetic field.

[0013] Preferably, the control device includes: a signal generating module, a test control module, a relay module, a second power amplifying module and a filtering module;

[0014] The control end of the test control module is electrically connected to the controlled end of the signal generating module, the output end of the signal generating module is electrically connected to the input end of the power monitoring device, the first end of the relay module is electrically connected to the information analysis device, the second end of the relay module is electrically connected to the input end of the second power amplification module, the output end of the second power amplification module is electrically connected to the first end of the second antenna group, the third end of the relay module is electrically connected to the output end of the filtering module, and the input end of the filtering module is electrically connected to the second end of the second antenna group.

[0015] Preferably, the power monitoring device comprises: a first power amplification module and a power meter;

[0016] The input end of the first power amplifier module is electrically connected to the control device, the output end of the first power amplifier module is electrically connected to the forward power end of the power meter, the reverse power end of the power meter is electrically connected to the first antenna group, and the control end of the power meter is electrically connected to the controlled end of the first power amplifier module.

[0017] Preferably, the information analysis device comprises: a data analysis module and an outdoor antenna;

[0018] The input end of the data analysis module is electrically connected to the first end of the outdoor antenna, and the second end of the outdoor antenna is electrically connected to the control device.

[0019] Preferably, the first antenna group includes at least a biconical logarithmic antenna and a horn antenna, and the biconical logarithmic antenna and the horn antenna are connected in parallel.

[0020] Preferably, the second antenna group is a conical logarithmic spiral antenna.

[0021] On the other hand, an embodiment of the present application provides a method for testing the radiation immunity of a communication device, comprising the following steps:

[0022] Acquire a modulated signal, and adjust the modulated signal based on preset modulation parameters to obtain an interference signal;

[0023] Acquire a communication signal, and adjust the communication signal based on preset communication parameters to obtain a standard communication signal;

[0024] Establish a test electromagnetic field in an anechoic chamber based on interference signals and standard communication signals;

[0025] Placing the device to be tested in a test electromagnetic field for operation, and collecting the test signal of the device to be tested in the test electromagnetic field;

[0026] Analyze the test signal based on the signal analysis criteria to obtain the packet loss rate and modal data;

[0027] The level of basic communication quality is determined based on the packet loss rate and the packet loss threshold. If the packet loss rate is greater than the packet loss threshold, the level of basic communication quality is determined to be poor. If the packet loss rate is less than or equal to the packet loss threshold, the level of basic communication quality is determined to be excellent.

[0028] When the basic communication quality is judged to be excellent, a communication quality analysis is performed based on the modal data to determine the data communication quality level;

[0029] The anti-interference capability of the device to be tested is determined based on the basic communication quality level and the data communication quality level.

[0030] Preferably, the specific process of analyzing the test signal based on the signal analysis criterion to obtain the packet loss rate and modal data is:

[0031] Select the data protocol and agreement based on the device to be tested, and parse the test signal based on the data protocol and agreement to obtain the data transmission frequency, text, picture and video;

[0032] Arrange text, pictures and videos to obtain modal data, and count the transmission time, size of a single data packet and number of received data packets;

[0033] Calculate the total number of data packets based on data transmission frequency, data transmission time and single data packet size;

[0034] The packet loss rate is calculated based on the total number of packets and the number of received packets.

[0035] Preferably, the specific process of performing communication quality analysis based on modal data to determine the data communication quality level is:

[0036] Count the number of missing data points of the modal data and obtain the baseline data points of the modal data;

[0037] Calculate the missing rate of modal data based on the number of missing data points and the number of baseline data points;

[0038] The data communication quality is judged based on the missing rate and the missing threshold. If the missing rate is greater than or equal to the missing threshold, the level of the data communication quality corresponding to the modal data is determined to be poor. If the missing rate is less than the missing threshold, the level of the data communication quality corresponding to the modal data is determined to be excellent.

[0039] Preferably, the specific process of determining the anti-interference capability of the device to be detected based on the basic communication quality level and the data communication quality level is:

[0040] Extract the level of basic communication quality and the level of communication quality. If the level of basic communication quality is poor, or the level of communication quality is poor, then mark the anti-interference capability of the corresponding device to be tested as poor. If the level of basic communication quality is excellent, and the level of communication quality is excellent, then mark the anti-interference capability of the corresponding device to be tested as excellent.

[0041] Beneficial effects of the present invention:

[0042] (1) This application generates interference signals based on the control device and the power monitoring device, obtains the communication signal corresponding to the actual working condition of the device to be tested through the information analysis device, and simulates the real electromagnetic field in the radio wave darkroom based on the interference signal and the communication signal to obtain a test electromagnetic field with dynamic and random characteristics, and performs a radiation immunity test on the device to be tested placed in the radio wave darkroom. After the second antenna group successfully collects the test signal, the control device is used to filter out the clutter in the test signal, so that the test signal originally containing the clutter signal is converted into a standard test signal containing only key data, so that when the information analysis device parses the standard signal, it will not misidentify the data features due to the interference of the key data, effectively improving the accuracy of the corresponding test results and significantly improving the test accuracy of the radiation immunity;

[0043] (2) The present application arranges an interference electromagnetic field corresponding to an interference signal in an anechoic chamber through a first antenna group, arranges a communication signal in the anechoic chamber through a second antenna group, so as to adjust the interference electromagnetic field to obtain a test electromagnetic field, and at the same time establishes wireless communication between the corresponding device to be tested and the control device and the information analysis device through the second antenna group to simulate the wireless properties of the device to be tested in an actual working environment, thereby realizing wireless transmission of the operating data of the device to be tested during the testing process, avoiding the differences caused by the data transmission method, that is, the integrity and stability of different data transmission methods are different, and thus the corresponding performance cannot be detected through different data transmission methods. Therefore, the present application realizes a high degree of consistency between the data transmission method and the actual working conditions during the anti-interference test through the wireless transmission, which significantly improves the comprehensiveness of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Other features, objects, and advantages of the present invention will become more apparent upon reading the detailed description of the non-limiting embodiments made with reference to the following drawings. The drawings are for the purpose of illustrating preferred embodiments only and are not to be construed as limiting the present invention. Like reference characters are used throughout the drawings to designate like parts.

[0045] Figure 1 This is a schematic diagram of the structure of a radiation immunity test device for communication equipment;

[0046] Figure 2 The figure is a flowchart of a radiation immunity test method for communication equipment. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0048] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be performed in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operations are completed, but can also have additional steps not included in the figures; the process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0049] For monitoring equipment used in power transmission line inspections, such as image monitoring devices, video monitoring devices, and drones, they must be in a complex electromagnetic field with a large number of interference signals and multiple communication signals when participating in power inspections. In order to accurately and comprehensively test the radiation immunity capability of the monitoring equipment, it is necessary to arrange the complex electromagnetic field in an anechoic chamber to simulate actual working conditions; Figure 1 As shown, the embodiment of this specification provides a radiation immunity test device for communication equipment, including: a power monitoring device arranged in a power amplifier room, a control device arranged in a control room, a first antenna group and a second antenna group arranged in an anechoic chamber, and an information analysis device arranged in an outdoor space;

[0050] The control device generates a modulation signal in response to the test instruction, adjusts the communication signal transmitted by the analysis device to obtain a standard communication signal, and filters the test signal transmitted by the second antenna group to obtain a standard test signal;

[0051] The power monitoring device adjusts the modulation signal transmitted by the control device to obtain an interference signal;

[0052] The information analysis device obtains the communication signal corresponding to the actual working condition of the device to be tested, and analyzes the standard test signal to obtain the test result;

[0053] The first antenna group generates an interfering electromagnetic field in the anechoic chamber based on an interference signal transmitted by the power monitoring device;

[0054] The second antenna group adjusts the interference electromagnetic field based on the standard communication signal to obtain a test electromagnetic field, and obtains a test signal of the device to be detected in the test electromagnetic field.

[0055] Specifically, in order to arrange the interference signal consistent with the actual working conditions in the radio wave darkroom, the power monitoring device and the first antenna group are used as interference side devices, wherein the first antenna group is arranged in the radio wave darkroom as an interference signal output device, which outputs the interference signal emitted by the power monitoring device into the radio wave darkroom to generate a multi-band electromagnetic field for radiation immunity test; the power monitoring device is arranged in the power amplifier room as an interference signal adjuster, which amplifies the power of the modulated signal emitted by the control device. The performance of the power monitoring device must meet the requirements of being able to amplify the power of 80MHz-6GHz signals and ensure that the corresponding In the anechoic chamber, after the first antenna group sends out the interference signal, it can generate an electric field of 30 volts per meter on a plane three meters away from the first antenna group. In addition, the power monitoring device can also obtain the output power of the first antenna group when it outputs the interference signal, so as to monitor the real-time output power of the interference signal and ensure that the interference signal is within the preset demand range; the control device is set in the control room as an interference source, and is used to output a variety of modulated signals that meet the preset frequency and amplitude. It supports the output of 80MHz-6GHz radio frequency signals, and also supports multi-mode signal modulation, such as amplitude modulation mode AM, frequency modulation mode FM and phase modulation mode ΦM. In addition, the corresponding test instruction can be understood as the activation state of the control device. When the control device is activated and started, it automatically generates a modulation signal. Furthermore, it is not enough for the electromagnetic field in the anechoic chamber to have only interference signals. There are also a large number of communication signals in the actual working environment of the corresponding device to be tested. In order to add the communication signals to the anechoic chamber, especially the widely used 4G or 5G signals, the second antenna group and the information analysis device are used as communication side devices. Among them, the information analysis device can obtain the communication signal in the actual working condition of the device to be tested, and the second antenna group transmits the communication signal to the anechoic chamber to improve the anechoic chamber. The electromagnetic field is used to realize wireless communication of the corresponding equipment to be detected in the radio wave darkroom, that is, image monitoring devices, video monitoring devices, and monitoring equipment such as drones, and the second antenna group detects the test signal of the equipment to be detected. The test signal actually contains the clutter signal of spurious waves such as other communication waves and interference waves. The spurious wave signal in the test signal is filtered out by the control device, and the test signal is converted into a standard test signal including only key data, that is, the standard test signal is actually test data without interference data, and the standard test signal is transmitted to the information analysis device for analysis to obtain the radiation immunity test result of the corresponding equipment to be detected.

[0056] It should be noted that the control device and the power monitoring device are connected through a coaxial cable, the power monitoring device and the first antenna group are connected through a coaxial cable, and the second antenna group and the control device are connected through a coaxial cable; the coaxial cable can transmit signals with extremely low loss. For example, in the low frequency band of 80-1GHz, the corresponding transmission loss can be controlled at 0.3 decibels per meter, and in the high frequency band of 1G-6G, the corresponding transmission loss can be controlled at 3 decibels per meter.

[0057] In addition, the output power of the interference signal is also affected by the corresponding link loss, that is, the actual output power of the interference signal is equal to the sum of the required output power and the link loss power. Moreover, the link loss itself is a very small value. When the corresponding link works for a long time and the temperature changes, the magnitude of the link loss also changes accordingly. Therefore, it is necessary to monitor the link loss of the interference signal in real time during the radiation immunity test process to adjust the output power of the interference signal according to the link loss. Specifically, the power monitoring device includes: a first power amplification module and a power meter;

[0058] The input end of the first power amplifier module is electrically connected to the control device, the output end of the first power amplifier module is electrically connected to the forward power end of the power meter, the reverse power end of the power meter is electrically connected to the first antenna group, and the control end of the power meter is electrically connected to the controlled end of the first power amplifier module.

[0059] The first power amplification module adjusts the modulation signal based on preset parameters to obtain an interference signal, thereby realizing power amplification of the modulation signal. The power meter collects the forward power value through the output end of the first power amplification module, that is, the power when the interference signal is just generated, and collects the reverse power value through the first antenna group, that is, the actual output power of the interference signal. The forward power value is subtracted from the reverse power value to obtain the link loss. Then, based on the link loss, the corresponding conditions of the interference signal are adjusted, such as the power, to ensure a high degree of consistency between the electromagnetic field generated by the interference signal in the radio darkroom and the actual working conditions of the corresponding monitoring equipment. Secondly, since the purpose of the power meter calculating the link loss is to adjust the power of the interference signal, the power meter actually also monitors the power of the interference signal.

[0060] It is worth noting that the parameters of the modulation signal and the first power amplification module can also be set according to specific detection requirements to adjust the electromagnetic field from the interference side to achieve simulation of a specific real electromagnetic field. For example, in the corresponding actual working environment, the intensity of the wireless communication co-frequency interference signal is greater than other interference signals. The parameters of the modulation signal and the first power amplification module can be set in a targeted manner to generate an interference signal corresponding to the wireless communication co-frequency interference signal, and the electromagnetic field established in the radio wave darkroom based on the communication signal is adjusted by the interference signal to obtain an electromagnetic field that is highly consistent with the actual working environment, thereby achieving high-precision control of the electromagnetic field. That is, on the basis of the electromagnetic field established in the radio wave darkroom by the communication signal, the electromagnetic field is adjusted by adjusting the parameters of the modulation signal to achieve simulation of a specific electromagnetic field; the parameters of the modulation signal are adjusted by adjusting the parameters of the signal generating module in the control device.

[0061] In one embodiment, in order to generate a multi-band electromagnetic field, the first antenna group includes at least a biconical logarithmic antenna and a horn antenna, and the biconical logarithmic antenna and the horn antenna are connected in parallel.

[0062] In this embodiment, the output frequency of the horn antenna is between 1 GHz and 18 GHz, and the biconical logarithmic antenna is essentially divided into a biconical antenna and a logarithmic antenna. The output frequency of the biconical antenna is between 30 MHz and 300 MHz, and the output frequency of the logarithmic antenna is between 300 MHz and 1 GHz. The biconical antenna and the logarithmic antenna can also be integrated together to form a biconical logarithmic composite antenna with a frequency of 30 MHz to 1 GHz.

[0063] Secondly, in order to introduce the communication signal of the device to be tested in actual working conditions into the anechoic chamber so that the device to be tested can perform wireless communication even in the anechoic chamber, the second antenna group is a conical logarithmic spiral antenna.

[0064] It should be noted that the communication signal is a real signal, not a simulated signal, so it is necessary to obtain the communication signal in actual working conditions. In one embodiment, in order to obtain the real communication signal, the information analysis device is divided into: a data analysis module and an outdoor antenna;

[0065] The input end of the data analysis module is electrically connected to the first end of the outdoor antenna, and the second end of the outdoor antenna is electrically connected to the control device.

[0066] In this embodiment, the data analysis module is used to parse the standard test signal to obtain the test result, the outdoor antenna is used to obtain the real communication signal, and the outdoor antenna and the second antenna group are used as a medium to establish a communication connection between the inside and outside of the anechoic chamber, thereby realizing real-time wireless communication of the device to be tested in the anechoic chamber, and directly introducing the real communication signal into the anechoic chamber, which can retain the detailed characteristics of the communication signal, such as spectral characteristics, time domain jitter, signal modulation method, etc., making the test of the device to be tested more comprehensive, exposing detailed defects, and improving the comprehensiveness of the test.

[0067] However, using only the second antenna group and the signal analysis device to introduce the communication signal into the anechoic chamber makes it difficult to ensure the coexistence of the communication signal and the test signal of the device under test, that is, confusion between the communication and radio frequency signals is likely to occur. In one embodiment, to solve the problem of confusion between the communication and radio frequency signals, the control device includes: a signal generation module, a test control module, a relay module, a second power amplification module, and a filtering module;

[0068] The control end of the test control module is electrically connected to the controlled end of the signal generating module, the output end of the signal generating module is electrically connected to the input end of the power monitoring device, the first end of the relay module is electrically connected to the information analysis device, the second end of the relay module is electrically connected to the input end of the second power amplification module, the output end of the second power amplification module is electrically connected to the first end of the second antenna group, the third end of the relay module is electrically connected to the output end of the filtering module, and the input end of the filtering module is electrically connected to the second end of the second antenna group.

[0069] In this embodiment, the test control module is used to set the parameters of the signal generator, that is, the frequency and field strength of the signal output by the signal generator, so as to realize the control of the modulation signal. When the test control module is powered on and activated, it controls the signal generator to generate the modulation signal; the second power amplification module is essentially the same power amplifier as the first power amplification module. The difference between it and the first power amplification module is that the object processed by the first power amplification module is the modulation signal, and the object processed by the second power amplification module is the real communication signal obtained by the analysis equipment; the filtering module is specifically a filter attenuator, which is used to filter out the specific electromagnetic waves and other clutter generated by the second antenna group, retain the test signal generated by the device to be tested, and realize the coexistence of radiation interference and wireless communication radio frequency, specifically, to obtain a radio wave darkroom. The multipath effect, Doppler frequency shift, dynamic time delay, interference signal superposition, signal-to-noise ratio, and other simulation records of electromagnetic waves are collected. Based on the simulation records, non-carrier amplitude modulation signal clutter is filtered out. The parameters of the filter attenuator are set based on the amplitude modulation signal clutter, and the electromagnetic waves passing through all the filter modules are filtered, that is, the test signal corresponding to the device to be tested is filtered. Secondly, the parameters of the second power amplifier module are adjusted to adjust the amplification gain of the second power amplifier module so that the intensity difference between the communication signal inside the radio wave darkroom and the communication signal outside the radio wave darkroom is within 10 decibels. Then, the second antenna group is connected, and the attenuation of the filter attenuator is first set to the maximum, and then the attenuation is gradually reduced until the device to be tested in the radio wave darkroom can communicate normally. At this point, the coexistence of radiated interference and wireless communication radio frequency has been achieved.

[0070] like Figure 2 As shown, the embodiment of this specification provides a method for testing the radiation immunity of communication equipment, including the following steps:

[0071] S1. Obtain a modulated signal, and adjust the modulated signal based on preset modulation parameters to obtain an interference signal;

[0072] S2. Acquire a communication signal, and adjust the communication signal based on preset communication parameters to obtain a standard communication signal;

[0073] S3. Establish a test electromagnetic field in an anechoic chamber based on the interference signal and the standard communication signal;

[0074] Specifically, in the physical scenario of power inspection, the monitoring equipment, that is, the signal source in the electromagnetic field where the equipment to be tested is located, such as the power, frequency, amplitude and other parameters of the interference signal and the communication signal are all within a certain range. In order to make the test electromagnetic field established in the radio wave darkroom based on the interference signal and the communication signal conform to the physical scenario, the modulation parameters corresponding to the interference signal and the communication parameters corresponding to the communication signal are pre-set. When the modulated signal is generated, the modulation signal is adjusted based on the modulation parameters to obtain the interference signal. At the same time, the communication signal is adjusted based on the communication parameters to generate a wireless signal, and a test electromagnetic field is established in the radio wave darkroom based on the interference signal and the communication signal to ensure a high degree of consistency between the test electromagnetic field and the corresponding physical electromagnetic field.

[0075] S4, placing the device to be tested in a test electromagnetic field for operation, and collecting a test signal of the device to be tested in the test electromagnetic field;

[0076] S5. Analyze the test signal based on the signal analysis criteria to obtain packet loss rate and modal data;

[0077] S51. Select a data protocol and a protocol based on the device to be tested, and parse the test signal based on the data protocol and the protocol to obtain data transmission frequency, text, pictures, and videos;

[0078] S52, collating text, pictures and videos to obtain modal data, and calculating data transmission time, single data packet size and number of received data packets;

[0079] S53, calculating the total number of data packets based on the data transmission frequency, data transmission time and the size of a single data packet;

[0080] S54. Calculate the packet loss rate based on the total number of data packets and the number of received data packets.

[0081] Specifically, when the device to be detected is a drone, the output data of the drone includes at least: JPG pictures, MP4 videos, and JSON text containing coordinates, attitude angles, and electromagnetic interference levels. When the device to be detected is an image monitoring device, the output data of the image monitoring device includes at least JPEG images. When the device to be detected is a video monitoring device, the output data of the video monitoring device includes at least encoded video streams. The difference in the output data results in different types of data that need to be parsed when corresponding to different types of devices to be detected. Therefore, it is necessary to screen the corresponding data specifications and protocols according to the type of device to be detected. It should be noted that the data specifications and protocols have been pre-stored in the corresponding analysis device and do not need to be reset each time a test is performed.

[0082] Secondly, the packet loss rate calculation process can be expressed by the packet loss rate formula, which is specifically:

[0083] ;

[0084] Where, is the packet loss rate, is the number of packets sent, that is, the total number of packets, The number of successfully received data packets, that is, the number of received data packets.

[0085] S6. Determine the level of basic communication quality based on the packet loss rate and the packet loss threshold. If the packet loss rate is greater than the packet loss threshold, determine the level of basic communication quality to be poor. If the packet loss rate is less than or equal to the packet loss threshold, determine the level of basic communication quality to be excellent.

[0086] Specifically, in the actual working scenarios of image monitoring devices, video monitoring devices, and transmission line monitoring equipment such as drones, the reliability of data transmission directly affects mission safety. Therefore, the packet loss rate of data must be lower than a certain threshold to maintain normal data transmission, and the normally transmitted data corresponds to the normal operation of the core functions of the equipment. Combined with international standards such as IEC61000-4-3, there are usually clear provisions on the anti-interference performance criteria of the equipment. For example, when the equipment is under a specific interference field strength, the performance degradation of key functions does not exceed an acceptable range, that is, the performance is temporarily degraded but can still be recovered. Based on this, the packet loss threshold is set to 1%. When the packet loss rate is maintained within 1%, the corresponding monitoring equipment can be automatically repaired through the retransmission mechanism of the protocol stack without affecting the execution of the task, so that the corresponding test data can explore the feasible performance limits of the corresponding monitoring equipment under characteristic scenarios.

[0087] S7. When the basic communication quality is determined to be excellent, performing communication quality analysis based on the modal data to determine the data communication quality level;

[0088] S71. Count the number of missing data points of the modal data and obtain the number of baseline data points of the modal data;

[0089] S72. Calculate the missing rate of modal data based on the number of missing data points and the number of baseline data points;

[0090] S73. Determine the data communication quality based on the missing rate and the missing threshold. If the missing rate is greater than or equal to the missing threshold, determine that the level of the data communication quality corresponding to the modal data is poor. If the missing rate is less than the missing threshold, determine that the level of the data communication quality corresponding to the modal data is excellent.

[0091] Specifically, during the radiation immunity test, the transient characteristics of the corresponding electromagnetic field may cause random loss of communication data of the device to be tested. When the lost data is too large, that is, the data loss rate is higher than a certain value, it will lead to the inability to analyze the performance changes in the corresponding time period, and the accuracy and comprehensiveness of the test results will be reduced. Based on this, the missing threshold is set to 1% to control the data loss rate within a reasonable range, that is, the proportion of lost data is small, and the impact on the global analysis is small, which effectively ensures the comprehensiveness and accuracy of the test.

[0092] S8. Determine the anti-interference capability of the device to be tested based on the basic communication quality level and the data communication quality level;

[0093] S81. Extract the level of basic communication quality and the level of communication quality. If the level of basic communication quality is poor, or the level of communication quality is poor, then mark the anti-interference capability of the corresponding device to be tested as poor. If the level of basic communication quality is excellent, and the level of communication quality is excellent, then mark the anti-interference capability of the corresponding device to be tested as excellent.

[0094] This embodiment has at least the following substantial effects:

[0095] (1) This embodiment generates interference signals based on the control device and the power monitoring device, obtains the communication signal corresponding to the actual working condition of the device to be tested through the information analysis device, and simulates the real electromagnetic field in the radio wave darkroom based on the interference signal and the communication signal to obtain a test electromagnetic field with dynamic and random characteristics, and performs a radiation immunity test on the device to be tested placed in the radio wave darkroom. After the second antenna group successfully collects the test signal, the control device filters out the clutter in the test signal, so that the test signal originally containing the clutter signal is converted into a standard test signal containing only key data, so that when the information analysis device parses the standard signal, it will not misidentify the data features due to the interference of the key data, effectively improving the accuracy of the corresponding test results and significantly improving the test accuracy of the radiation immunity;

[0096] (2) In this embodiment, an interference electromagnetic field corresponding to an interference signal is arranged in an anechoic chamber by a first antenna group, and a communication signal is arranged in the anechoic chamber by a second antenna group to adjust the interference electromagnetic field to obtain a test electromagnetic field. At the same time, wireless communication is established between the corresponding device to be tested and the control device and the information analysis device through the second antenna group to simulate the wireless properties of the device to be tested in an actual working environment, thereby realizing wireless transmission of operating data of the device to be tested during the testing process, avoiding differences caused by data transmission methods, that is, different data transmission methods have different performance such as integrity and stability, and thus it is impossible to detect corresponding performance through different data transmission methods. In this embodiment, the data transmission method in the process of anti-interference test is highly consistent with the actual working conditions through the wireless transmission, thereby significantly improving the comprehensiveness of the test.

[0097] The above specific embodiments are preferred embodiments of the present invention and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific embodiments. All equivalent changes made in accordance with the shape, structure, and method of the present invention are within the scope of protection of the present invention.

Claims

1. A radiation immunity test device for communication equipment, characterized in that: The system includes: a power monitoring device arranged in the power amplifier room, a control device arranged in the control room, a first antenna group and a second antenna group arranged in the anechoic room, and an information analysis device arranged in the outdoor space; The control device generates a modulation signal in response to the test instruction, adjusts the communication signal transmitted by the analysis device to obtain a standard communication signal, and filters the test signal transmitted by the second antenna group to obtain a standard test signal; The power monitoring device adjusts the modulation signal transmitted by the control device to obtain an interference signal; The information analysis device obtains the communication signal corresponding to the actual working condition of the device to be tested, the communication signal obtained is a real signal, and analyzes the standard test signal to obtain the test result; The first antenna group generates an interfering electromagnetic field in the anechoic chamber based on an interference signal transmitted by the power monitoring device; The second antenna group adjusts the interference electromagnetic field based on the standard communication signal to obtain a test electromagnetic field, and obtains a test signal of the device to be detected in the test electromagnetic field; The control device includes: a signal generation module, a test control module, a relay module, a second power amplification module and a filter module; the second antenna group is a conical logarithmic spiral antenna; the information analysis device is divided into: a data analysis module and an outdoor antenna; The outdoor antenna and the second antenna group are used as a medium to establish a communication connection between the anechoic chamber and the anechoic chamber.

2. The radiation immunity test device for communication equipment according to claim 1, characterized in that: The control end of the test control module is electrically connected to the controlled end of the signal generating module, the output end of the signal generating module is electrically connected to the input end of the power monitoring device, the first end of the relay module is electrically connected to the information analysis device, the second end of the relay module is electrically connected to the input end of the second power amplification module, the output end of the second power amplification module is electrically connected to the first end of the second antenna group, the third end of the relay module is electrically connected to the output end of the filtering module, and the input end of the filtering module is electrically connected to the second end of the second antenna group.

3. The radiation immunity test device for communication equipment according to claim 1, characterized in that: The power monitoring device includes: a first power amplification module and a power meter; The input end of the first power amplifier module is electrically connected to the control device, the output end of the first power amplifier module is electrically connected to the forward power end of the power meter, the reverse power end of the power meter is electrically connected to the first antenna group, and the control end of the power meter is electrically connected to the controlled end of the first power amplifier module.

4. The radiation immunity test device for communication equipment according to claim 1, characterized in that: The information analysis equipment includes: a data analysis module and an outdoor antenna; The input end of the data analysis module is electrically connected to the first end of the outdoor antenna, and the second end of the outdoor antenna is electrically connected to the control device.

5. The radiation immunity test device for communication equipment according to claim 1, characterized in that: The first antenna group includes at least a biconical logarithmic antenna and a horn antenna, and the biconical logarithmic antenna and the horn antenna are connected in parallel.

6. A method for testing the radiation immunity of communication equipment, implemented by the apparatus according to any one of claims 1 to 5, characterized in that: The following steps are involved: Acquire a modulated signal, and adjust the modulated signal based on preset modulation parameters to obtain an interference signal; Acquire a communication signal, and adjust the communication signal based on preset communication parameters to obtain a standard communication signal; Establish a test electromagnetic field in an anechoic chamber based on interference signals and standard communication signals; Placing the device to be tested in a test electromagnetic field for operation, and collecting the test signal of the device to be tested in the test electromagnetic field; Analyze the test signal based on the signal analysis criteria to obtain the packet loss rate and modal data; The level of basic communication quality is determined based on the packet loss rate and the packet loss threshold. If the packet loss rate is greater than the packet loss threshold, the level of basic communication quality is determined to be poor. If the packet loss rate is less than or equal to the packet loss threshold, the level of basic communication quality is determined to be excellent. When the basic communication quality is judged to be excellent, a communication quality analysis is performed based on the modal data to determine the data communication quality level; The anti-interference capability of the device to be tested is determined based on the basic communication quality level and the data communication quality level.

7. The method for testing radiation immunity of communication equipment according to claim 6, wherein: The specific process of analyzing the test signal based on the signal analysis criterion to obtain the packet loss rate and modal data is as follows: Select data protocol and agreement based on the device to be tested, and parse the test signal based on the data protocol and agreement to obtain data transmission frequency, text, pictures and videos; Arrange text, pictures and videos to obtain modal data, and count the transmission time, size of a single data packet and number of received data packets; Calculate the total number of data packets based on data transmission frequency, data transmission time and single data packet size; The packet loss rate is calculated based on the total number of packets and the number of received packets.

8. The method for testing radiation immunity of communication equipment according to claim 6, wherein: The specific process of performing communication quality analysis based on modal data to determine the data communication quality level is as follows: Count the number of missing data points of the modal data and obtain the baseline data points of the modal data; Calculate the missing rate of modal data based on the number of missing data points and the number of baseline data points; The data communication quality is judged based on the missing rate and the missing threshold. If the missing rate is greater than or equal to the missing threshold, the level of the data communication quality corresponding to the modal data is determined to be poor. If the missing rate is less than the missing threshold, the level of the data communication quality corresponding to the modal data is determined to be excellent.

9. The method for testing radiation immunity of communication equipment according to claim 6, wherein: The specific process of determining the anti-interference capability of the device to be tested based on the basic communication quality level and the data communication quality level is as follows: Extract the level of basic communication quality and the level of communication quality. If the level of basic communication quality is poor, or the level of communication quality is poor, then mark the anti-interference capability of the corresponding device to be tested as poor. If the level of basic communication quality is excellent, and the level of communication quality is excellent, then mark the anti-interference capability of the corresponding device to be tested as excellent.

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