Strong electromagnetic pulse injection test system and method for radio frequency component of unmanned aerial vehicle

Abstract

The invention provides a strong electromagnetic pulse injection test system and method for a radio frequency component of an unmanned aerial vehicle, in the system, a pulse generation device generates a plurality of injection signals based on a strong electromagnetic pulse generation strategy and sends the injection signals to a signal monitoring device and a control device, and the signal monitoring device is used for sampling each injection signal and a reflection signal; the control device is used for generating a plurality of analog signals, coupling the analog signals and the injection signals to obtain a plurality of coupling signals, and transmitting the coupling signals to the control device. According to the coupling signals, the monitoring parameters of the injection signals corresponding to the coupling signals and the monitoring parameters of the reflection signals, at least one electromagnetic protection threshold value of the unmanned aerial vehicle is determined, and the analog signals are used for simulating actual working signals of the unmanned aerial vehicle. The injection signal parameters are flexible to regulate and control, the parameter coverage range is wide, the test result can be quantitatively evaluated, and the interference of the strong electromagnetic pulse on the unmanned aerial vehicle is visually reflected.

Description

Technical Field

[0001] The present application relates to the field of pulse testing technology, and more specifically, to a system and method for injecting strong electromagnetic pulses into a test device for radio frequency components of unmanned aerial vehicles. Background Art

[0002] In recent years, drone technology has rapidly developed and commercialized on a large scale, with its applications penetrating widely across various fields. However, drone technology currently faces a severe interference threat from strong electromagnetic pulses (EMPs). Strong EMPs are electromagnetic radiation with electric field strengths exceeding kilovolts per meter, pulse widths ranging from nanoseconds to microseconds, and a spectrum ranging from kHz to GHz. If these strong EMPs are applied to drone electronic systems for a short period of time, they can interfere with, disrupt, degrade, and damage the drone, seriously impacting its normal operation. Therefore, improving the drone's ability to operate stably in complex electromagnetic environments and enhancing its electromagnetic protection have become key issues in drone safety design.

[0003] Prior to designing a solution to enhance a drone's electromagnetic protection, it was necessary to test the interference of strong electromagnetic pulses on the drone. These strong electromagnetic pulse testing methods primarily include irradiation and injection. The irradiation method directly irradiates the drone with a strong electromagnetic pulse source and determines the electromagnetic protection threshold by observing whether the drone's communication, control, and computing systems fail. The injection method injects microwaves directly into the drone's components via waveguides, coaxial microwave cables, or microstrip lines, and gradually adjusts the microwave parameters to determine the electromagnetic protection threshold.

[0004] However, both of the above methods have the problem of being non-intuitive and non-quantifiable. Summary of the Invention

[0005] The purpose of this application is to address the deficiencies in the above-mentioned prior art and provide a strong electromagnetic pulse injection test system and method for UAV RF components to solve the non-intuitive and non-quantifiable problems in the prior art.

[0006] To achieve the above objectives, the technical solutions adopted in this application are as follows: In a first aspect, the present application provides a strong electromagnetic pulse injection test system for UAV radio frequency components, comprising: a pulse generating device, a signal monitoring device, and a control device; The pulse generating device is connected to the signal monitoring device, and is used to generate multiple injection signals based on a preset strong electromagnetic pulse generation strategy, and send the multiple injection signals to the signal monitoring device and the control device. The strong electromagnetic pulse generation strategy includes: using a control variable method to adjust the power, pulse width, repetition frequency, number of pulses and pulse leading edge of the initial signal in a preset direction; The signal monitoring device is connected to the control device, and is used to sample each of the injection signals and each reflected signal reflected by the control device, and obtain monitoring parameters of the injection signals and monitoring parameters of the reflected signals according to the sampled signals, and send the monitoring parameters of the injection signals and monitoring parameters of the reflected signals to the control device; The control device is used to generate multiple analog signals and couple each of the analog signals with each of the injection signals to obtain multiple coupled signals. The control device determines the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal based on each coupled signal, the monitoring parameters of the injection signal corresponding to each coupled signal, and the monitoring parameters of the reflected signal. The control device also determines at least one electromagnetic protection threshold of the drone based on the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal. The analog signals are used to simulate actual working signals of the drone.

[0007] Optionally, the control device includes: a navigation control module; the navigation control module includes: a first directional coupler, a first limiter, a first attenuator, an analog signal source, a receiving unit and a navigation control unit; the analog signal includes: a navigation analog signal; A first end of the first directional coupler is connected to the signal monitoring device, a second end of the first directional coupler is connected to one end of the first limiter, the other end of the first limiter is connected to one end of the first attenuator, and the other end of the first attenuator is connected to one end of the analog signal source, the analog signal source is used to generate the navigation analog signal, and after being processed by the first attenuator and the first limiter, the processed navigation analog signal is sent to the first directional coupler; The third end of the first directional coupler is connected to one end of the receiving unit, and the other end of the receiving unit is connected to the navigation control unit. The first directional coupler is used to couple the received injection signal and the navigation simulation signal to obtain a navigation coupled signal, and send the navigation coupled signal to the navigation control unit after processing through the receiving unit; The navigation control unit is used to determine the carrier-to-noise ratio and effective injection parameters corresponding to each navigation coupling signal based on the navigation coupling signal, the monitoring parameters of the injection signal, and the monitoring parameters of the reflected signal, and determine at least one navigation electromagnetic protection threshold of the UAV based on the carrier-to-noise ratio and effective injection parameters corresponding to each navigation coupling signal.

[0008] Optionally, the control device includes: a communication control module; the communication control module includes: a second directional coupler, a ground controller, a transmitting antenna, a receiving antenna, an airborne communication unit, a flight control unit and a communication control unit, and the analog signal includes: a communication analog signal; The ground controller is connected to the transmitting antenna, and the ground controller is used to transmit a communication analog signal through the transmitting antenna; The receiving antenna is connected to the second end of the second directional coupler, the first end of the second directional coupler is connected to the signal monitoring device, the third end of the second directional coupler is connected to one end of the airborne communication unit, the other end of the airborne communication unit is connected to one end of the flight control unit, and the other end of the flight control unit is connected to the communication control unit; The receiving antenna is used to receive the communication analog signal transmitted by the transmitting antenna, and the second directional coupler is used to couple the injection signal and the communication analog signal to obtain a communication coupling signal, and send the communication coupling signal to the airborne communication unit.

[0009] The onboard communication unit is configured to receive the communication coupling signal, adjust a current communication state, and send the communication coupling signal and the current communication state to the flight control unit; The flight control unit is used to verify the working state according to the current communication state and send the communication coupling signal to the communication control unit; The communication control unit is used to determine the carrier-to-noise ratio and effective injection parameters corresponding to each communication coupling signal based on the communication coupling signal, the monitoring parameters of the injection signal, and the monitoring parameters of the reflected signal, and determine at least one communication electromagnetic protection threshold of the drone based on the carrier-to-noise ratio and effective injection parameters corresponding to each communication coupling signal.

[0010] Optionally, the pulse generating device includes: an injection signal source, a circulator, a power amplifier and a bandpass filter; The injection signal source is connected to one end of the circulator, the other end of the circulator is connected to one end of the power amplifier, the other end of the power amplifier is connected to one end of the bandpass filter, and the other end of the bandpass filter is connected to the signal monitoring device; The injection signal source is used to generate a signal to be processed based on the strong electromagnetic pulse generation strategy, and after being processed by the circulator, the power amplifier and the bandpass filter, the injection signal is obtained and sent to a signal monitoring device.

[0011] Optionally, the signal monitoring device includes: a third directional coupler, a second limiter, a third limiter, a second attenuator, a third attenuator, and an oscilloscope; A first end of the third directional coupler is connected to the pulse generating device, a second end of the third directional coupler is connected to the control device, a third end of the third directional coupler is connected to one end of the second limiter, and a fourth end of the third directional coupler is connected to one end of the third limiter. The third directional coupler is used to sample the injection signal and the reflected signal reflected by the control device; The other end of the second limiter is connected to one end of the second attenuator, and the other end of the second attenuator is connected to the first end of the oscilloscope; The other end of the third limiter is connected to one end of the third attenuator, and the other end of the third attenuator is connected to the second end of the oscilloscope; The oscilloscope is in communication with the control device, and is used to monitor the monitoring parameters of the injection signal and the monitoring parameters of the reflection signal, and send the monitoring parameters of the injection signal and the monitoring parameters of the reflection signal to the control device.

[0012] In a second aspect, the present application provides a strong electromagnetic pulse injection test method for a UAV radio frequency component, the method being applied to a control device in a strong electromagnetic pulse injection test system for a UAV radio frequency component as described in the first aspect; the method comprising: Acquire multiple coupled signals, monitoring parameters of injection signals corresponding to each coupled signal, and monitoring parameters of reflected signals, and obtain link attenuation, where the link attenuation is pre-determined based on the loss of the strong electromagnetic pulse injection test system for the UAV radio frequency component; Determining a carrier-to-noise ratio and an effective injection parameter corresponding to each coupled signal based on the link attenuation, each coupled signal, a monitoring parameter of an injection signal corresponding to each coupled signal, and a monitoring parameter of a reflected signal; At least one electromagnetic protection threshold of the UAV is determined based on the carrier-to-noise ratio and effective injection parameters corresponding to each coupled signal.

[0013] Optionally, determining the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal according to the link attenuation, each coupled signal, a monitoring parameter of an injection signal corresponding to each coupled signal, and a monitoring parameter of a reflected signal includes: Determine the carrier-to-noise ratio corresponding to each coupled signal according to each coupled signal; An effective injection parameter corresponding to each coupling signal is determined according to the link attenuation, a monitoring parameter of the injection signal corresponding to each coupling signal, and a monitoring parameter of the reflection signal.

[0014] Optionally, determining the effective injection parameter corresponding to each coupled signal according to the link attenuation, the monitoring parameter of the injection signal corresponding to each coupled signal, and the monitoring parameter of the reflected signal includes: Determining injection signal parameters according to the monitoring parameters of the injection signal and the link attenuation; determining a reflected signal parameter according to the monitored parameter of the reflected signal and the link attenuation; An effective injection parameter is determined according to the injection signal parameter and the reflection signal parameter.

[0015] Optionally, determining at least one electromagnetic protection threshold of the UAV according to the carrier-to-noise ratio and the effective injection parameter corresponding to each coupled signal includes: Determine the carrier-to-noise ratio threshold corresponding to the target parameter; Determine a candidate coupled signal having a carrier-to-noise ratio less than a carrier-to-noise ratio threshold value corresponding to the target parameter among coupled signals corresponding to the target parameter; The effective signal parameter corresponding to the coupled signal having the smallest difference between the carrier-to-noise ratio and the carrier-to-noise ratio threshold among the candidate coupled signals is used as the electromagnetic protection threshold of the target parameter.

[0016] Optionally, before acquiring the multiple coupled signals, the monitoring parameters of the injection signal corresponding to each coupled signal, and the monitoring parameters of the reflection signal, the method further includes: The signal generation performance of the pulse generation device is verified by monitoring the parameters of the injection signal and the monitoring parameters of the reflection signal.

[0017] The present application provides the following advantageous effects: a pulse generator generates multiple injection signals based on a strong electromagnetic pulse generation strategy and transmits them to a signal monitoring device and a control device. The strong electromagnetic pulse generation strategy includes using a control variable method to adjust the power, pulse width, repetition frequency, number of pulses, and pulse leading edge of the initial signal, thereby enabling quantitative analysis of the failure process and damage patterns of a drone under the influence of the injection signals. The signal monitoring device monitors the injection signals and reflected signals and transmits the monitored injection signal and reflected signal monitoring parameters to the control device. The control device generates a simulated signal and couples the simulated signal with the injection signal to simulate the signal of a drone subjected to interference from the injection signal. The control device also determines the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal based on the monitoring parameters of the injection signal and the monitoring parameters of the reflected signal corresponding to each coupled signal. Furthermore, based on the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal, the control device determines at least one electromagnetic protection threshold for the drone. In this embodiment, since the injection parameters are adjusted using a control variable method, the injection signal parameters can be flexibly controlled. Furthermore, the control module determines the electromagnetic protection threshold based on the carrier-to-noise ratio of the coupled signal, enabling quantitative evaluation of the test results. In this process, the injected signal parameters cover a wide range and the effectors have strong universality, which can intuitively reflect the interference of strong electromagnetic pulses on drones, thereby providing convenience for enhancing the electromagnetic protection performance of drones. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a structural diagram of a strong electromagnetic pulse injection test system for UAV radio frequency components provided by an embodiment of the present application; Figure 2 is a structural diagram of a control device provided in an embodiment of the present application; Figure 3 is a structural diagram of another control device provided in an embodiment of the present application; Figure 4 1 is a schematic structural diagram of a pulse generating device provided in an embodiment of the present application; Figure 5 This is a schematic structural diagram of a signal monitoring device provided in an embodiment of the present application; Figure 6 This is a flow chart of a strong electromagnetic pulse injection test method for UAV radio frequency components provided by an embodiment of the present application; Figure 7 This is a flow chart of determining effective injection parameters corresponding to each coupling signal provided by an embodiment of the present application; Figure 8 This is a flow chart of determining at least one electromagnetic protection threshold of a drone provided by an embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of illustration and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps without logical context can be reversed or implemented simultaneously. In addition, those skilled in the art, under the guidance of the contents of this application, can add one or more other operations to the flowchart, or remove one or more operations from the flowchart.

[0021] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0022] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0023] Existing strong electromagnetic pulse testing methods mainly include irradiation and injection. However, these methods are not intuitive and cannot be quantified, which makes them unable to meet the needs of large-scale applications and multi-parameter configuration.

[0024] Based on this, the present application provides a strong electromagnetic pulse injection test system and method for drone radio frequency components. In the system, a pulse generating device generates multiple injection signals according to a strong electromagnetic pulse generation strategy, a signal monitoring device monitors the monitoring parameters of the injection signal and the reflected signal, and a control module generates multiple analog signals and detects the carrier-to-noise ratio of the coupled signal obtained by coupling the injection signal and the analog signal. According to the carrier-to-noise ratio of the multiple coupled signals and the monitoring parameters of the injection signal and the reflected signal, at least one electromagnetic protection threshold of the drone is determined, thereby intuitively and quantifiably analyzing the failure process and damage law of the drone under the influence of the injection signal.

[0025] Next, refer to Figure 1 This paper introduces the structure of the strong electromagnetic pulse injection test system for UAV RF components. Figure 1 This is a structural diagram of a strong electromagnetic pulse injection test system for UAV radio frequency components provided in an embodiment of the present application.

[0026] Optionally, a strong electromagnetic pulse injection test system for UAV radio frequency components includes: a pulse generating device 10, a signal monitoring device 20 and a control device 30.

[0027] Optionally, the pulse generating device 10 is connected to the signal monitoring device 20. The pulse generating device 10 is used to generate multiple injection signals based on a preset strong electromagnetic pulse generation strategy, and send the multiple injection signals to the signal monitoring device 20 and the control device 30. The strong electromagnetic pulse generation strategy includes: using the control variable method to adjust the power, pulse width, repetition frequency, number of pulses and pulse front of the initial signal in a preset direction.

[0028] The preset direction may be from large to small or from small to large.

[0029] Specifically, the pulse generating device 10 is used to generate strong electromagnetic pulses and has multi-dimensional parameter adjustment capabilities. That is, it adjusts various parameters of the initial signal based on the control variable method. The parameters can be, for example, power, pulse width, repetition frequency, number of pulses, and pulse leading edge. Specifically, the parameters adjusted in the injection signal are the parameters to be measured in this round of testing. In the process of successively adjusting the parameters to be measured in the initial signal, the other parameters of the initial signal remain unchanged, and the electromagnetic protection threshold determined by the control device 30 in this round is the threshold related to the parameters to be measured. For example, the preset direction can be a direction from small to large. In six test rounds, the pulse generating device 10 successively generates injection signals with powers of 100 watts, 200 watts, 500 watts, 800 watts, 1000 watts, and 1200 watts.

[0030] It is worth noting that power, pulse width, repetition frequency, number of pulses and pulse front are only the types of parameters listed in this embodiment. In actual application, other parameters of the pulse can be controlled and tested.

[0031] Optionally, to ensure the accuracy of the test results, multiple tests can be performed using the same injection signal, and the average of the multiple test results can be taken as the final test value of the injection signal for the parameter, so as to ensure accurate test results. For example, the pulse generating device 10 generates six injection signals based on the same parameter, so that the control device 30 performs tests based on these six injection signals respectively.

[0032] Optionally, the signal monitoring device 20 is connected to the control device 30, and the signal monitoring device 20 is used to sample each injection signal and each reflected signal reflected by the control device 30, and obtain the monitoring parameters of the injection signal and the monitoring parameters of the reflected signal based on the sampled signal monitoring, and send the monitoring parameters of the injection signal and the monitoring parameters of the reflected signal to the control device 30.

[0033] Optionally, the signal detection device may include a directional coupler for sampling the injected signal and the reflected signal on the transmission link. The reflected signal refers to a signal formed when part of the injected signal's energy propagates in the reverse direction during transmission due to a mismatch between the impedance of the transmission medium or the control device 30 and the source impedance.

[0034] Alternatively, the monitoring parameter may be voltage. The signal monitoring device 20 may monitor the voltage of the injected signal and the voltage of the reflected signal, and transmit the injected signal voltage and the voltage of the reflected signal to the control device 30 in real time. It is worth noting that the signal monitoring device 20 does not transmit the monitoring parameters of the injected signal and the monitoring parameters of the reflected signal to the control device 30 via the same transmission path as the injected signal, but rather transmits the data via another transmission path. Alternatively, the monitoring parameters may be transmitted via wireless communication.

[0035] Optionally, the control device 30 is used to generate multiple analog signals, and couple each analog signal and each injection signal to obtain multiple coupled signals, and determine the carrier-to-noise ratio and effective injection parameters corresponding to each coupled signal based on each coupled signal, the monitoring parameters of the injection signal corresponding to each coupled signal, and the monitoring parameters of the reflected signal, and determine at least one electromagnetic protection threshold of the drone based on the carrier-to-noise ratio and effective injection parameters corresponding to each coupled signal. The analog signal is used to simulate the actual working signal of the drone.

[0036] Optionally, this embodiment can perform a strong electromagnetic pulse injection test on each component of the drone, for example, on the navigation component and the communication component of the drone. Therefore, when performing a strong electromagnetic pulse injection test on the navigation component, the control device 30 can generate multiple navigation simulation signals to simulate the actual operating signals of the navigation component of the drone. When performing a strong electromagnetic pulse injection test on the communication component, the control device 30 can generate multiple communication simulation signals to simulate the actual operating signals of the communication component of the drone.

[0037] Optionally, the parameters of each analog signal may remain unchanged.

[0038] Optionally, the analog signal and the corresponding injection signal are coupled to obtain a coupled signal, wherein the coupled signal may be equivalent to a working signal of the drone under the influence of the injection signal.

[0039] As an optional embodiment, the control device 30 can directly monitor each coupling signal to determine the carrier-to-noise ratio corresponding to each coupling signal, and determine the effective injection parameters corresponding to each coupling signal based on the monitoring parameters of the injection signal corresponding to each coupling signal and the monitoring parameters of the reflected signal.

[0040] The carrier-to-noise ratio (CNR) of the coupled signal is the ratio of the carrier power to the noise power in the signal, which measures the signal quality during transmission or sampling. A significant decrease in the CNR indicates that the current effective injection parameters have exceeded or are at the drone's electromagnetic protection threshold.

[0041] The electromagnetic protection threshold is the critical value at which the injected signal interferes with the normal operation of the drone. In this embodiment, the electromagnetic protection threshold corresponding to different parameters can be generated.

[0042] The effective injection parameters are a set of key indicators used to measure energy transmission efficiency, system matching, and signal quality during signal injection. Their core purpose is to quantify the relationship between the reflected signal and the injected signal, thereby evaluating the effective energy percentage and related characteristics actually injected into the control device 30.

[0043] As an optional implementation, as the measured parameters in the injection signal are adjusted, while maintaining the received signal strength, if the carrier-to-noise ratio of the coupled signal significantly decreases, the effective injection parameter corresponding to the coupled signal is used as at least one electromagnetic protection threshold for the drone. A significant decrease can be determined by a preset decrease threshold. Specifically, if the difference between the current coupled signal's carrier-to-noise ratio and the previous coupled signal's carrier-to-noise ratio is greater than the decrease threshold, then the current coupled signal's carrier-to-noise ratio has significantly decreased.

[0044] For example, as the power of the injected signal increases, while ensuring the received signal strength, if the power of the injected signal is 100 watts, the carrier-to-noise ratio of the coupled signal decreases significantly compared to the carrier-to-noise ratio when the frequency of the injected signal is less than 100 watts, then the effective injection parameter corresponding to the coupled signal is used as at least one electromagnetic protection threshold of the drone.

[0045] As another optional implementation, the carrier-to-noise ratio of the coupled signal can be monitored in real time while the injection signal is generated. If the carrier-to-noise ratio does not drop significantly, the parameters of the injection signal are adjusted, such as increasing the power of the injection signal, and the carrier-to-noise ratio of the coupled signal is continuously monitored until the carrier-to-noise ratio drops significantly. The effective signal parameters corresponding to the current coupled signal are then used as an electromagnetic protection threshold.

[0046] Optionally, the control device 30 may include a human-computer interaction interface. During the test, various parameter information is displayed in real time through the human-computer interaction interface. The parameter information includes at least the carrier-to-noise ratio of the coupled signal, the monitoring parameters of the injection signal corresponding to the coupled signal, the monitoring parameters of the reflected signal, and the effective injection parameters.

[0047] In this embodiment, a pulse generator generates multiple injection signals based on a strong electromagnetic pulse generation strategy and transmits them to a signal monitoring device and a control device. The strong electromagnetic pulse generation strategy includes using a control variable method to adjust the initial signal's power, pulse width, repetition frequency, number of pulses, and pulse leading edge, thereby enabling quantitative analysis of the failure process and damage patterns of drones under the influence of the injection signals. The signal monitoring device monitors the injection and reflected signals and transmits the monitored parameters of the injection and reflected signals to the control device. The control device generates a simulated signal and couples the simulated signal with the injection signal to simulate the drone's signal when interfered with by the injection signals. The control device also determines the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal based on the monitoring parameters of the injection and reflected signals corresponding to each coupled signal. Based on the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal, the control device determines at least one electromagnetic protection threshold for the drone. In this embodiment, because the injection parameters are adjusted using a control variable method, the injection signal parameters can be flexibly controlled. Furthermore, the control module determines the electromagnetic protection threshold based on the carrier-to-noise ratio of the coupled signal, enabling quantitative evaluation of the test results. In this process, the injected signal parameters cover a wide range and the effectors have strong universality, which can intuitively reflect the interference of strong electromagnetic pulses on drones, thereby providing convenience for enhancing the electromagnetic protection performance of drones.

[0048] Optionally, a strong electromagnetic pulse injection test system for the UAV's RF components can be used to test the UAV's navigation components and communication components separately.

[0049] Next, refer to Figure 2 , first we will introduce the test of the navigation component for drones. Figure 2 3 is a schematic structural diagram of a control device 30 provided in an embodiment of the present application.

[0050] Optionally, the control device 30 includes a navigation control module, which includes a first directional coupler 301, a first limiter 302, a first attenuator 303, an analog signal source 304, a receiving unit 305, and a navigation control unit 306. The analog signal includes a navigation analog signal.

[0051] Optionally, the navigation simulation signal is used to simulate the actual working signal of the navigation component of the drone.

[0052] Optionally, the first end of the first directional coupler 301 is connected to the signal monitoring device 20, the second end of the first directional coupler 301 is connected to one end of the first limiter 302, the other end of the first limiter 302 is connected to one end of the first attenuator 303, and the other end of the first attenuator 303 is connected to one end of the analog signal source 304. The analog signal source 304 is used to generate a navigation analog signal, and after being processed by the first attenuator 303 and the first limiter 302, the processed navigation analog signal is sent to the first directional coupler 301.

[0053] Specifically, the first attenuator 303 is configured to attenuate the power of the analog signal according to a preset ratio. The first limiter 302 is configured to limit the amplitude of the output signal to a preset safety range when the power of the signal output by the first attenuator 303 exceeds a preset power, thereby protecting the back-end circuit from strong signal impact.

[0054] Optionally, the navigation simulation signal generated by the simulation signal source 304 may be an actual satellite navigation signal, such as a satellite navigation signal of a satellite system such as GPS, GLONASS, or Galileo.

[0055] Optionally, the third end of the first directional coupler 301 is connected to one end of the receiving unit 305, and the other end of the receiving unit 305 is connected to the navigation control unit 306. The first directional coupler 301 is used to couple the received injection signal and the navigation simulation signal to obtain a navigation coupling signal, and then process the navigation coupling signal through the receiving unit 305 and send it to the navigation control unit 306.

[0056] The receiving unit 305 is configured to receive the navigation coupling signal sent by the first directional coupler 301, process the received navigation coupling signal, and send the processed navigation coupling signal to the navigation control unit 306. Specifically, the processing of the navigation coupling signal may include filtering and the like.

[0057] Optionally, the output power of the analog signal source 304 may be adjusted to thereby adjust the strength of the signal received by the navigation control unit 306 .

[0058] Optionally, the navigation control unit 306 is used to determine the carrier-to-noise ratio and effective injection parameters corresponding to each navigation coupling signal based on the monitoring parameters of the navigation coupling signal, the injection signal, and the monitoring parameters of the reflected signal, and determine at least one navigation electromagnetic protection threshold of the drone based on the carrier-to-noise ratio and effective injection parameters corresponding to each navigation coupling signal.

[0059] Optionally, the navigation control unit 306 may be a host computer, specifically configured to determine the carrier-to-noise ratio and effective injection parameters corresponding to each navigation coupling signal based on multiple navigation coupling signals, monitoring parameters of injection signals corresponding to the multiple navigation coupling signals, and monitoring parameters of corresponding reflection signals.

[0060] Optionally, the navigation control unit 306 may also control and monitor the working mode and status parameters of the navigation control module. The status parameters may be, for example, latitude and longitude, altitude, number of searched satellites, and carrier-to-noise ratio corresponding to the navigation coupling signal.

[0061] In this embodiment, an analog signal source generates a navigation analog signal. A first directional coupler couples an injection signal and the navigation analog signal to generate a coupled navigation signal. The navigation control unit determines at least one navigation electromagnetic protection threshold for the drone based on the coupled navigation signal, monitoring parameters of the injection signal, and monitoring parameters of the reflected signal. This embodiment simulates the navigation component environment to quantitatively test the interference of the injection signal on the navigation component.

[0062] Next, refer to Figure 3 , first we will introduce the test of communication components for drones. Figure 3 It is a structural diagram of another control device 30 provided in an embodiment of the present application.

[0063] Optionally, the control device 30 includes a communication control module, which includes a second directional coupler 307, a ground controller 308, a transmitting antenna 309, a receiving antenna 310, an airborne communication unit 311, a flight control unit 312, and a communication control unit 313, and the analog signal includes a communication analog signal.

[0064] Optionally, the ground controller 308 is connected to the transmitting antenna 309 , and the ground controller 308 is used to transmit communication analog signals through the transmitting antenna 309 .

[0065] Optionally, the communication analog signal sent by the ground controller 308 may be a measurement and control signal, and the ground controller 308 may adjust the transmission power of the communication analog signal.

[0066] Optionally, the receiving antenna 310 is connected to the second end of the second directional coupler 307, the first end of the second directional coupler 307 is connected to the signal monitoring device 20, the third end of the second directional coupler 307 is connected to one end of the airborne communication unit 311, the other end of the airborne communication unit 311 is connected to one end of the flight control unit 312, and the other end of the flight control unit 312 is connected to the communication control unit 313.

[0067] Optionally, the receiving antenna 310 is used to receive the communication analog signal transmitted by the transmitting antenna 309 , and the second directional coupler 307 is used to couple the injection signal and the communication analog signal to obtain a communication coupling signal, and send the communication coupling signal to the airborne communication unit 311 .

[0068] Optionally, the onboard communication unit 311 is configured to receive a communication coupling signal and adjust a current communication state, and send the communication coupling signal and the current communication state to the flight control unit 312 .

[0069] Optionally, the airborne communication unit 311 has a time division duplex communication mode. The airborne communication unit 311 can simulate the actual working state of the communication component and can truly reflect the impact of a strong electromagnetic pulse on the communication component.

[0070] Optionally, the current communication state may include an operating mode and state parameters of the communication component, wherein the operating mode includes a modulation mode and a demodulation mode, and the state parameters include the number of sent data packets and the number of received data packets.

[0071] Optionally, the flight control unit 312 is configured to verify the working status according to the current communication status and send a communication coupling signal to the communication control unit 313 .

[0072] Specifically, the flight control unit 312 is used to verify whether the current working state is a normal communication state according to the working mode and state parameters in the current communication state.

[0073] Optionally, the communication control unit 313 is used to determine the carrier-to-noise ratio and effective injection parameters corresponding to each communication coupling signal based on the monitoring parameters of the communication coupling signal, the injection signal, and the monitoring parameters of the reflected signal, and determine at least one communication electromagnetic protection threshold of the drone based on the carrier-to-noise ratio and effective injection parameters corresponding to each communication coupling signal.

[0074] Optionally, the communication control unit 313 monitors the received signal strength, signal-to-noise ratio, and carrier-to-noise ratio based on the communication coupling signal.

[0075] Optionally, the communication control unit 313 may be a host computer, specifically configured to determine the carrier-to-noise ratio and effective injection parameters corresponding to each communication coupling signal based on multiple communication coupling signals, monitoring parameters of injection signals corresponding to the multiple communication coupling signals, and monitoring parameters of corresponding reflected signals.

[0076] In this embodiment, the ground controller generates a communication simulation signal. A second directional coupler couples the injection signal and the communication simulation signal to generate a communication coupling signal. The communication control unit determines at least one communication electromagnetic protection threshold for the drone based on the communication coupling signal, monitoring parameters of the injection signal, and monitoring parameters of the reflected signal. This embodiment simulates the communication component environment to quantitatively test the interference of the injection signal on the communication component.

[0077] Next, refer to Figure 4 , the pulse generating device 10 in the strong electromagnetic pulse injection test system for the radio frequency components of the UAV is introduced. Figure 4 It is a structural schematic diagram of a pulse generating device 10 provided in an embodiment of the present application.

[0078] Optionally, the pulse generating device 10 includes: an injection signal source 101 , a circulator 102 , a power amplifier 103 and a bandpass filter 104 .

[0079] Optionally, the injection signal source 101 is connected to one end of the circulator 102 , the other end of the circulator 102 is connected to one end of the power amplifier 103 , the other end of the power amplifier 103 is connected to one end of the bandpass filter 104 , and the other end of the bandpass filter 104 is connected to the signal monitoring device 20 .

[0080] Optionally, the injection signal source 101 is used to generate a signal to be processed based on a strong electromagnetic pulse generation strategy, and after being processed by the circulator 102 , the power amplifier 103 and the bandpass filter 104 , an injection signal is obtained and sent to the signal monitoring device 20 .

[0081] Optionally, the injection signal source 101 is configured to use a control variable method to adjust the power, pulse width, repetition frequency, number of pulses, and pulse leading edge of the initial signal to generate a signal to be processed.

[0082] Optionally, circulator 102 is used to transmit signals in a predetermined direction and isolate reverse signals. Power amplifier 103 is used to amplify low-power signals to high-power signals. In this embodiment, power amplifier 103 has a maximum output power of 4000 watts. Bandpass filter 104 allows signals within a specific frequency range to pass while attenuating out-of-band signals.

[0083] Optionally, the frequency of the injected signal covers the frequency of the analog signal, specifically, covers the normal operating frequencies of the navigation component and the communication component of the drone.

[0084] In this embodiment, the signal to be processed is generated and processed by an injection signal source, a circulator, a power amplifier, and a bandpass filter to obtain an injection signal, thereby using adjustable parameters to perform an injection test on the UAV under strong electromagnetic pulse parameters.

[0085] Next, refer to Figure 5 , a signal monitoring device 20 for a strong electromagnetic pulse injection test system for UAV radio frequency components is introduced. Figure 5 2 is a schematic structural diagram of a signal monitoring device 20 provided in an embodiment of the present application.

[0086] Optionally, the signal monitoring device 20 includes: a third directional coupler 201 , a second limiter 202 , a second attenuator 203 , a third limiter 204 , a third attenuator 205 and an oscilloscope 206 .

[0087] Optionally, the first end of the third directional coupler 201 is connected to the pulse generating device 10, the second end of the third directional coupler 201 is connected to the control device 30, the third end of the third directional coupler 201 is connected to one end of the second limiter 202, and the fourth end of the third directional coupler 201 is connected to one end of the third limiter 204. The third directional coupler 201 is used to sample the injection signal and the reflected signal reflected by the control device 30.

[0088] Optionally, the other end of the second limiter 202 is connected to one end of the second attenuator 203 , and the other end of the second attenuator 203 is connected to a first end of the oscilloscope 206 .

[0089] Optionally, the other end of the third limiter 204 is connected to one end of the third attenuator 205 , and the other end of the third attenuator 205 is connected to the second end of the oscilloscope 206 .

[0090] Optionally, the oscilloscope 206 is in communication with the control device 30 , and is configured to monitor monitoring parameters of the injection signal and the reflection signal, and send the monitoring parameters of the injection signal and the reflection signal to the control device 30 .

[0091] Optionally, the second limiter 202 , the third limiter 204 , the second attenuator 203 and the third attenuator 205 are all used to protect the oscilloscope 206 .

[0092] Optionally, the oscilloscope 206 may display the waveform of the injection signal and the waveform of the reflection signal.

[0093] In this embodiment, the injection signal and the reflected signal are monitored in real time through the third directional coupler, the second limiter, the third limiter, the second attenuator, the third attenuator and the oscilloscope, so as to quantify the impact of the injection signal on the drone.

[0094] Figure 6This is a flow chart of a strong electromagnetic pulse injection test method for a UAV RF component provided by an embodiment of the present application. After introducing the specific structure of the strong electromagnetic pulse injection test system for a UAV RF component, refer to Figure 6 This paper introduces the strong electromagnetic pulse injection test method for UAV RF components.

[0095] The method is applied to the control device 30 in the strong electromagnetic pulse injection test system for the UAV radio frequency component. Before the strong electromagnetic pulse injection test method for the UAV radio frequency component is carried out, the control device 30 is preliminarily tested according to the strong electromagnetic pulse injection test method. Figure 1-Figure 5 The schematic structure builds a strong electromagnetic pulse injection test system for UAV radio frequency components, and the pulse generating device 10 generates multiple injection signals in sequence.

[0096] S601. Acquire multiple coupled signals, monitoring parameters of the injection signals corresponding to each coupled signal, and monitoring parameters of the reflected signal, and obtain link attenuation. The link attenuation is pre-determined based on the loss of a strong electromagnetic pulse injection test system for the UAV radio frequency component.

[0097] Specifically, link attenuation can be measured using a vector network analyzer. Specifically, before each test round, a vector network analyzer can be used to measure the loss of the strong electromagnetic pulse injection test system for the drone's RF components. The loss can be the sum of the losses of each module or component during signal transmission.

[0098] Optionally, when the frequency of the injection parameter does not change, the link attenuation does not change. Therefore, when the frequency of the injection signal is not adjusted, the link attenuation does not need to be detected again, thereby saving workload.

[0099] Optionally, the link attenuation may include the insertion loss of the directional coupler, the coupling degree of the directional coupler, the insertion loss of the limiter, and the loss of the attenuator. Figure 1-Figure 5 As shown, the directional couplers can be the first directional coupler 301, the second directional coupler 307 and the third directional coupler 201 in the strong electromagnetic pulse injection test system for the radio frequency components of the drone, the limiters can be the first limiter 302, the second limiter 202 and the third limiter 204, and the attenuators can be the first attenuator 303, the second attenuator 203 and the third attenuator 205.

[0100] S602: Determine the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal according to the link attenuation, each coupled signal, the monitoring parameter of the injection signal corresponding to each coupled signal, and the monitoring parameter of the reflected signal.

[0101] As an optional implementation, the effective injection parameter corresponding to each coupled signal can be determined based on the link attenuation, the monitoring parameter of the injection signal corresponding to each coupled signal, and the monitoring parameter of the corresponding reflected signal. In addition, the control device 30 can directly monitor the carrier-to-noise ratio of each coupled signal.

[0102] S603: Determine at least one electromagnetic protection threshold of the UAV according to the carrier-to-noise ratio and the effective injection parameter corresponding to each coupled signal.

[0103] As an optional implementation, the coupled signals corresponding to the carrier-to-noise ratios of the coupled signals that are lower than a preset carrier-to-noise ratio threshold are determined, and the effective injection parameters corresponding to the coupled signals closest to the carrier-to-noise ratio threshold among the above coupled signals are used as an electromagnetic protection threshold for the UAV.

[0104] For example, if there are 5 coupling signals, the carrier-to-noise ratio corresponding to the coupling signal A is 30dB, the carrier-to-noise ratio corresponding to the coupling signal B is 30dB, the carrier-to-noise ratio corresponding to the coupling signal C is 30dB, the carrier-to-noise ratio corresponding to the coupling signal D is -10dB, and the carrier-to-noise ratio corresponding to the coupling signal E is -16dB. The preset carrier-to-noise ratio threshold is 0dB, then the coupling signal D and the coupling signal E meet the conditions, and the coupling signal D is closest to the carrier-to-noise ratio threshold. Then the effective injection parameter corresponding to the coupling signal D is used as an electromagnetic protection threshold.

[0105] As an optional implementation, if, of the coupled signals obtained by adjusting a parameter, the carrier-to-noise ratio corresponding to one coupled signal is greater than a preset carrier-to-noise ratio threshold, and the carrier-to-noise ratio corresponding to the other coupled signal is less than the preset carrier-to-noise ratio threshold, the pulse generating device 10 can continue to generate the injection signal, so that the parameter of the newly generated injection signal is the middle value of the parameter of the two aforementioned injection signals. This method can obtain a highly accurate electromagnetic protection threshold for drones.

[0106] Optionally, the control device 30 can also determine the failure state corresponding to each coupling signal by monitoring parameters such as the signal-to-noise ratio of each coupling signal, thereby summarizing the failure law of the drone under the influence of a strong electromagnetic pulse.

[0107] In this embodiment, the carrier-to-noise ratio and effective injection parameters corresponding to each coupling signal are determined by obtaining multiple coupling signals, monitoring parameters of the injection signal, monitoring parameters of the reflected signal, and link attenuation. Based on the carrier-to-noise ratio and effective injection parameters corresponding to each coupling signal, at least one electromagnetic protection threshold of the drone is determined, thereby quantitatively evaluating the limits and failure patterns of the drone's electromagnetic protection under the influence of strong electromagnetic pulses.

[0108] Next, the specific steps of determining the carrier-to-noise ratio and effective injection parameters corresponding to each coupled signal in the above step S602 are introduced. Optionally, a carrier-to-noise ratio corresponding to each coupled signal is determined according to each coupled signal.

[0109] Optionally, the control device 30 may directly monitor each coupled signal to obtain a carrier-to-noise ratio corresponding to each coupled signal.

[0110] Optionally, the effective injection parameter corresponding to each coupled signal is determined according to the link attenuation, the monitoring parameter of the injection signal corresponding to each coupled signal, and the monitoring parameter of the reflected signal.

[0111] Optionally, the monitoring parameter may be voltage, and the effective injection power corresponding to each coupled signal is determined based on the link attenuation, the voltage of the injection signal corresponding to each coupled signal, and the voltage of the reflected signal. As an optional implementation, the power of the injection signal may be determined based on the link attenuation and the voltage of the injection signal corresponding to each coupled signal, and the power of the reflected signal may be determined based on the link attenuation and the voltage of each reflected signal. Finally, the effective injection power corresponding to each coupled signal may be determined based on the power of the injection signal and the power of the reflected signal.

[0112] In this embodiment, the carrier-to-noise ratio corresponding to each coupled signal is determined based on each coupled signal, and the effective injection parameter corresponding to each coupled signal is determined based on the link attenuation, the monitoring parameters of the injection signal corresponding to each coupled signal, and the monitoring parameters of the reflected signal, thereby accurately quantifying the impact of various strong electromagnetic pulses on the drone.

[0113] Next, refer to Figure 7 The specific steps of determining the effective injection parameters corresponding to each coupled signal based on the link attenuation, the monitoring parameters of the injection signal corresponding to each coupled signal, and the monitoring parameters of the reflected signal are introduced. Figure 7 This is a flow chart of determining effective injection parameters corresponding to each coupling signal provided by an embodiment of the present application.

[0114] S701: Determine injection signal parameters according to monitoring parameters of the injection signal and link attenuation.

[0115] If the monitoring parameter of the injection signal is the peak voltage, the injection signal power can be determined based on the peak voltage of the injection signal and the link attenuation. For example, the formula for obtaining the injection signal power is as follows (1): (1) Where Pi is the injected signal power, Ui is the peak voltage of the injected signal, I is the injected signal measurement link attenuation, and T is the injected signal link attenuation.

[0116] The injection signal measurement link attenuation I can be determined based on the loss information of the injection signal link in the signal monitoring device 20. Specifically, the injection signal measurement link attenuation is obtained by the sum of the coupling degree of the third directional coupler 201, the insertion loss of the second limiter 202, and the attenuation of the second attenuator 203.

[0117] The injection signal link attenuation T can be determined based on the transmission link loss information of the injection signal in a strong electromagnetic pulse injection test system for UAV RF components. Specifically, when testing navigation components, the injection signal link attenuation can be the sum of the insertion loss of the first directional coupler 301 and the insertion loss of the third directional coupler 201. When testing communication components, the injection signal link attenuation can be the sum of the insertion loss of the second directional coupler 307 and the insertion loss of the third directional coupler 201.

[0118] S702: Determine a reflected signal parameter according to the monitored parameter of the reflected signal and the link attenuation.

[0119] If the monitoring parameter of the reflected signal is the peak voltage, the reflected signal power can be determined based on the peak voltage of the reflected signal and the link attenuation. For example, the formula for obtaining the reflected signal power is as follows (2): (2) Where Pr is the reflected signal power, Ur is the peak voltage of the reflected signal, and R is the attenuation of the reflected signal measurement link.

[0120] The attenuation R of the reflected signal measurement link can be determined based on the loss information of the reflected signal link in the signal monitoring device 20. Specifically, the attenuation of the reflected signal measurement link is obtained by the sum of the coupling degree of the third directional coupler 201, the insertion loss of the third limiter 204, and the attenuation of the third attenuator 205.

[0121] S703: Determine effective injection parameters according to the injection signal parameters and the reflection signal parameters.

[0122] Optionally, the effective injection parameter may be an effective injection power. The effective injection power is determined according to the injection signal power and the reflected signal power, as shown in the following formulas (3) and (4): (3) (4) Where Pe is the effective injection power of a single pulse, Pae is the effective injection power, N is the number of pulses, and n represents the nth pulse.

[0123] In this embodiment, the injection signal parameters are determined based on the monitoring parameters of the injection signal and the link attenuation, the reflection signal parameters are determined based on the monitoring parameters of the reflection signal and the link attenuation, and the effective injection parameters are determined based on the injection signal parameters and the reflection signal parameters, thereby determining the parameters that can effectively interfere with the normal operation of the drone and avoid the influence of the reflection signal.

[0124] Next, refer to Figure 8 The specific method for determining at least one electromagnetic protection threshold of the drone in step S603 is introduced. Figure 8 This is a flow chart of determining at least one electromagnetic protection threshold of a drone provided by an embodiment of the present application.

[0125] S801: Determine a carrier-to-noise ratio threshold corresponding to a target parameter.

[0126] Optionally, the target parameter may be one of multiple parameters to be tested, and the carrier-to-noise ratio thresholds of the target parameters may be different.

[0127] S802: Determine a candidate coupled signal having a carrier-to-noise ratio less than a carrier-to-noise ratio threshold corresponding to the target parameter among the coupled signals corresponding to the target parameter.

[0128] Optionally, if the carrier-to-noise ratio of the coupled signal is less than the carrier-to-noise ratio threshold, it means that the injection signal corresponding to the coupled signal effectively interferes with the normal operation of the drone.

[0129] S803 : Using the effective signal parameter corresponding to the coupled signal having the smallest difference between the carrier-to-noise ratio and the carrier-to-noise ratio threshold among the candidate coupled signals as the electromagnetic protection threshold of the target parameter.

[0130] Optionally, the smaller the difference between the carrier-to-noise ratio and the carrier-to-noise ratio threshold, the closer the coupled signal is to the critical value of interfering with the normal operation of the drone.

[0131] In this embodiment, by determining the candidate coupling signals whose carrier-to-noise ratio is less than the carrier-to-noise ratio threshold corresponding to the target parameter among the coupling signals corresponding to the target parameter, the effective signal parameter corresponding to the coupling signal with the smallest difference between the carrier-to-noise ratio and the carrier-to-noise ratio threshold among the candidate coupling signals is used as the electromagnetic protection threshold of the target parameter, thereby accurately obtaining the signal interference critical value corresponding to each parameter.

[0132] As an optional implementation, before acquiring multiple coupled signals, monitoring parameters of the injection signal corresponding to each coupled signal, and monitoring parameters of the reflection signal, the following steps may be further performed: Optionally, the signal generation performance of the pulse generating device 10 is verified by monitoring parameters of the injection signal and monitoring parameters of the reflection signal.

[0133] Specifically, the control device 30 can be replaced with a power load. Then, by monitoring the monitoring parameters of the injected signal and the monitoring parameters of the reflected signal, it can be determined whether the injected signal generated by the pulse generating device 10 is the expected signal. If so, it indicates that the signal generation performance of the pulse generating device 10 is good. If not, it indicates that the pulse generating device 10 and the signal monitoring device 20 have failed. The above method can achieve the prediction of the injected signal waveform.

[0134] Optionally, the signal generation performance of the pulse generating device 10 is verified to ensure that the pulse generating device 10 and the signal monitoring device 20 can operate normally.

[0135] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the protection scope of the present application.

Claims

1. A strong electromagnetic pulse injection test system for UAV radio frequency components, characterized in that: include: Pulse generating device, signal monitoring device and control device; The pulse generating device is connected to the signal monitoring device, and is used to generate multiple injection signals based on a preset strong electromagnetic pulse generation strategy, and send the multiple injection signals to the signal monitoring device and the control device. The strong electromagnetic pulse generation strategy includes: using a control variable method to adjust the power, pulse width, repetition frequency, number of pulses and pulse leading edge of the initial signal in a preset direction; The signal monitoring device is connected to the control device, and is used to sample each of the injection signals and each reflected signal reflected by the control device, and obtain monitoring parameters of the injection signals and monitoring parameters of the reflected signals according to the sampled signals, and send the monitoring parameters of the injection signals and monitoring parameters of the reflected signals to the control device; The control device is used to generate multiple analog signals and couple each of the analog signals with each of the injection signals to obtain multiple coupled signals. The control device determines the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal based on each coupled signal, the monitoring parameters of the injection signal corresponding to each coupled signal, and the monitoring parameters of the reflected signal. The control device also determines at least one electromagnetic protection threshold of the drone based on the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal. The analog signals are used to simulate actual working signals of the drone.

2. The strong electromagnetic pulse injection test system for UAV radio frequency components according to claim 1 is characterized in that: The control device includes: a navigation control module; the navigation control module includes: a first directional coupler, a first limiter, a first attenuator, an analog signal source, a receiving unit and a navigation control unit; the analog signal includes: a navigation analog signal; A first end of the first directional coupler is connected to the signal monitoring device, a second end of the first directional coupler is connected to one end of the first limiter, the other end of the first limiter is connected to one end of the first attenuator, and the other end of the first attenuator is connected to one end of the analog signal source, the analog signal source is used to generate the navigation analog signal, and after being processed by the first attenuator and the first limiter, the processed navigation analog signal is sent to the first directional coupler; The third end of the first directional coupler is connected to one end of the receiving unit, and the other end of the receiving unit is connected to the navigation control unit. The first directional coupler is used to couple the received injection signal and the navigation simulation signal to obtain a navigation coupled signal, and send the navigation coupled signal to the navigation control unit after processing through the receiving unit; The navigation control unit is used to determine the carrier-to-noise ratio and effective injection parameters corresponding to each navigation coupling signal based on the navigation coupling signal, the monitoring parameters of the injection signal, and the monitoring parameters of the reflected signal, and determine at least one navigation electromagnetic protection threshold of the UAV based on the carrier-to-noise ratio and effective injection parameters corresponding to each navigation coupling signal.

3. The strong electromagnetic pulse injection test system for UAV radio frequency components according to claim 1 is characterized in that: The control device includes: a communication control module; the communication control module includes: a second directional coupler, a ground controller, a transmitting antenna, a receiving antenna, an airborne communication unit, a flight control unit and a communication control unit, and the analog signal includes: a communication analog signal; The ground controller is connected to the transmitting antenna, and the ground controller is used to transmit a communication analog signal through the transmitting antenna; The receiving antenna is connected to the second end of the second directional coupler, the first end of the second directional coupler is connected to the signal monitoring device, the third end of the second directional coupler is connected to one end of the airborne communication unit, the other end of the airborne communication unit is connected to one end of the flight control unit, and the other end of the flight control unit is connected to the communication control unit; The receiving antenna is used to receive the communication analog signal transmitted by the transmitting antenna, and the second directional coupler is used to couple the injection signal and the communication analog signal to obtain a communication coupled signal, and send the communication coupled signal to the airborne communication unit; The onboard communication unit is configured to receive the communication coupling signal, adjust a current communication state, and send the communication coupling signal and the current communication state to the flight control unit; The flight control unit is used to verify the working state according to the current communication state and send the communication coupling signal to the communication control unit; The communication control unit is used to determine the carrier-to-noise ratio and effective injection parameters corresponding to each communication coupling signal based on the communication coupling signal, the monitoring parameters of the injection signal, and the monitoring parameters of the reflected signal, and determine at least one communication electromagnetic protection threshold of the drone based on the carrier-to-noise ratio and effective injection parameters corresponding to each communication coupling signal.

4. The strong electromagnetic pulse injection test system for UAV radio frequency components according to claim 1 is characterized in that: The pulse generating device comprises: an injection signal source, a circulator, a power amplifier and a bandpass filter; The injection signal source is connected to one end of the circulator, the other end of the circulator is connected to one end of the power amplifier, the other end of the power amplifier is connected to one end of the bandpass filter, and the other end of the bandpass filter is connected to the signal monitoring device; The injection signal source is used to generate a signal to be processed based on the strong electromagnetic pulse generation strategy, and after being processed by the circulator, the power amplifier and the bandpass filter, the injection signal is obtained and sent to a signal monitoring device.

5. The strong electromagnetic pulse injection test system for UAV radio frequency components according to claim 1 is characterized in that: The signal monitoring device includes: a third directional coupler, a second limiter, a third limiter, a second attenuator, a third attenuator and an oscilloscope; A first end of the third directional coupler is connected to the pulse generating device, a second end of the third directional coupler is connected to the control device, a third end of the third directional coupler is connected to one end of the second limiter, and a fourth end of the third directional coupler is connected to one end of the third limiter. The third directional coupler is used to sample the injection signal and the reflected signal reflected by the control device; The other end of the second limiter is connected to one end of the second attenuator, and the other end of the second attenuator is connected to the first end of the oscilloscope; The other end of the third limiter is connected to one end of the third attenuator, and the other end of the third attenuator is connected to the second end of the oscilloscope; The oscilloscope is in communication with the control device, and is used to monitor the monitoring parameters of the injection signal and the monitoring parameters of the reflection signal, and send the monitoring parameters of the injection signal and the monitoring parameters of the reflection signal to the control device.

6. A strong electromagnetic pulse injection test method for UAV radio frequency components, characterized in that: The method is applied to a control device in a strong electromagnetic pulse injection test system for a radio frequency component of a drone as described in any one of claims 1 to 5; the method comprises: Acquire multiple coupled signals, monitoring parameters of injection signals corresponding to each coupled signal, and monitoring parameters of reflected signals, and obtain link attenuation, where the link attenuation is pre-determined based on the loss of the strong electromagnetic pulse injection test system for the UAV radio frequency component; Determining a carrier-to-noise ratio and an effective injection parameter corresponding to each coupled signal based on the link attenuation, each coupled signal, a monitoring parameter of an injection signal corresponding to each coupled signal, and a monitoring parameter of a reflected signal; At least one electromagnetic protection threshold of the UAV is determined based on the carrier-to-noise ratio and effective injection parameters corresponding to each coupled signal.

7. The strong electromagnetic pulse injection test method for UAV radio frequency components according to claim 6 is characterized in that: Determining the carrier-to-noise ratio and effective injection parameter corresponding to each coupled signal according to the link attenuation, each coupled signal, a monitoring parameter of an injection signal corresponding to each coupled signal, and a monitoring parameter of a reflected signal includes: Determine the carrier-to-noise ratio corresponding to each coupled signal according to each coupled signal; An effective injection parameter corresponding to each coupling signal is determined according to the link attenuation, a monitoring parameter of the injection signal corresponding to each coupling signal, and a monitoring parameter of the reflection signal.

8. The strong electromagnetic pulse injection test method for UAV radio frequency components according to claim 7 is characterized in that: The determining, based on the link attenuation, the monitoring parameters of the injection signal corresponding to each coupled signal, and the monitoring parameters of the reflected signal, of the effective injection parameters corresponding to each coupled signal includes: Determining injection signal parameters according to the monitoring parameters of the injection signal and the link attenuation; determining a reflected signal parameter according to the monitored parameter of the reflected signal and the link attenuation; An effective injection parameter is determined according to the injection signal parameter and the reflection signal parameter.

9. The strong electromagnetic pulse injection test method for UAV radio frequency components according to claim 6 is characterized in that: The determining of at least one electromagnetic protection threshold of the UAV according to the carrier-to-noise ratio and the effective injection parameter corresponding to each coupled signal includes: Determine the carrier-to-noise ratio threshold corresponding to the target parameter; Determine a candidate coupled signal having a carrier-to-noise ratio less than a carrier-to-noise ratio threshold value corresponding to the target parameter among coupled signals corresponding to the target parameter; The effective signal parameter corresponding to the coupled signal having the smallest difference between the carrier-to-noise ratio and the carrier-to-noise ratio threshold among the candidate coupled signals is used as the electromagnetic protection threshold of the target parameter.

10. The strong electromagnetic pulse injection test method for UAV radio frequency components according to claim 6, characterized in that: Before acquiring the plurality of coupled signals, the monitoring parameters of the injection signal corresponding to each coupled signal, and the monitoring parameters of the reflection signal, the method further includes: The signal generation performance of the pulse generation device is verified by monitoring the parameters of the injection signal and the monitoring parameters of the reflection signal.

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