Active suppression type multi-band electromagnetic interference filtering system and method for unmanned aerial vehicle

Abstract

The invention provides an active suppression type multi-band electromagnetic interference filtering system and method for an unmanned aerial vehicle, and the system comprises a signal input unit which is used for receiving input signals from a plurality of to-be-protected modules in an unmanned aerial vehicle system; the interference identification unit is used for monitoring frequency spectrum information of the input signals in real time and identifying interference characteristics of the input signals; the control processing unit is used for generating a corresponding filtering control instruction according to the identification result; the active filtering unit is used for dynamically adjusting filtering parameters according to the control instruction and completing suppression of multi-band electromagnetic interference; and the signal output unit is used for outputting the filtered signal to the corresponding unmanned aerial vehicle module. The active suppression type multi-band electromagnetic interference filtering system is specially designed for an unmanned aerial vehicle system, has the characteristics of intelligence, light weight and high efficiency, can effectively improve the anti-interference capability of an unmanned aerial vehicle in a complex electromagnetic environment, and has a wide engineering application prospect.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic pulse shielding technology, and in particular to an active suppression multi-band electromagnetic interference filtering system and method for unmanned aerial vehicles (UAVs). Background Technology

[0002] With the widespread application of drone technology in surveying, aerial photography, power line inspection, and security, airborne electronic equipment is becoming increasingly complex, including flight controllers, electronic speed controllers (ESCs), power management modules, image transmission equipment, GPS modules, and various wireless communication units. Due to the high integration and compact layout of these devices, electromagnetic interference (EMI) is easily generated between modules, and they are also susceptible to interference from the external electromagnetic environment. In severe cases, this can cause problems such as image interruption, navigation errors, and flight control failure. Currently, when drones operate at multiple frequencies, they generate electromagnetic emissions (EME) and are subject to electromagnetic interference (EMI), affecting the stability and safety of core modules such as communication, navigation, flight control, and image transmission.

[0003] Existing EMI suppression technologies mainly include passive filters, metal shielding, and PCB layout optimization. However, most of these methods provide fixed-band suppression and lack dynamic response capabilities to varying interference frequencies and intensities. Especially during flight, the electromagnetic environment in which the drone operates continuously changes, making it difficult for traditional solutions to guarantee consistent electromagnetic compatibility performance throughout the entire flight. Specific problems include: 1. Complex multi-band interference sources A drone has multiple subsystems: flight control, electronic speed controller, image transmission, GPS, radar, etc. Each system operates at a different frequency, which can cause cross-interference between them; at the same time, the external environment (base stations, power towers, other drones) may also cause interference.

[0004] 2. Traditional filters have poor adaptability. Traditional EMI filters are generally passive, fixed to a certain frequency band, and have a slow response to variable interference frequencies. They cannot accurately suppress dynamically changing interference and are slow to respond to sudden interference (such as radar waves), which leads to performance degradation.

[0005] 3. Limited by size and power consumption Because drones have limited space and battery capacity, they cannot use large EMI filter modules or excessively energy-intensive active shielding solutions.

[0006] Therefore, there is an urgent need for a highly integrated, dynamically responsive, and multi-band electromagnetic interference-adaptable filtering module to improve the electromagnetic compatibility and operational reliability of UAVs. Summary of the Invention

[0007] The purpose of this invention is to provide an active suppression multi-band electromagnetic interference filtering system and method for unmanned aerial vehicles (UAVs), aiming to solve the above-mentioned problems in the prior art.

[0008] This invention provides an active suppression multi-band electromagnetic interference filtering system for unmanned aerial vehicles (UAVs), comprising: A signal input unit, connected to an interference identification unit, is used to receive input signals from multiple modules to be protected in the UAV system and transmit the input signals to the interference identification unit. An interference identification unit, connected to the signal input unit and the control processing unit, is used to monitor the spectrum information of the input signal in real time, identify the interference characteristics of the input signal, and send the identification result to the control processing unit. A control processing unit, connected to the interference identification unit and the active filtering unit, is used to generate a corresponding filtering control command based on the identification result and send the control command to the active filtering unit. An active filtering unit, connected to the control processing unit and the signal output unit, is used to dynamically adjust the filtering parameters according to the control command to suppress multi-band electromagnetic interference. The signal output unit is connected to the active filtering unit and is used to output the filtered signal to the corresponding UAV module.

[0009] This invention provides an active suppression multi-band electromagnetic interference filtering method for unmanned aerial vehicles (UAVs), comprising: The signal input unit receives input signals from multiple modules to be protected in the UAV system and transmits the input signals to the interference identification unit. The interference identification unit monitors the spectrum information of the input signal in real time, identifies the interference characteristics of the input signal, and sends the identification results to the control processing unit. The control processing unit generates a corresponding filtering control command based on the recognition result and sends the control command to the active filtering unit. The active filtering unit dynamically adjusts the filtering parameters according to the control command to suppress multi-band electromagnetic interference. The filtered signal is output to the corresponding UAV module through the signal output unit.

[0010] This invention also provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps of the above-described active suppression multi-band electromagnetic interference filtering method for unmanned aerial vehicles.

[0011] This invention also provides a computer-readable storage medium storing an information transmission implementation program, which, when executed by a processor, implements the steps of the above-described active suppression multi-band electromagnetic interference filtering method for unmanned aerial vehicles.

[0012] The following beneficial effects can be achieved by adopting the embodiments of the present invention: The embodiments of the present invention provide an active suppression multi-band electromagnetic interference filtering system designed specifically for unmanned aerial vehicle (UAV) systems. It has the characteristics of intelligence, lightweight and high efficiency, and can effectively improve the anti-interference ability of UAVs in complex electromagnetic environments. It has broad engineering application prospects and can solve the problems of slow response, single frequency band and poor adaptability in the existing technology. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of an active suppression multi-band electromagnetic interference filtering system for unmanned aerial vehicles according to an embodiment of the present invention; Figure 2 This is a flowchart of the active suppression multi-band electromagnetic interference filtering method for drones according to an embodiment of the present invention. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0016] System Implementation Examples According to embodiments of the present invention, an active suppression multi-band electromagnetic interference filtering system for unmanned aerial vehicles (UAVs) is provided. Figure 1 This is a schematic diagram of an active suppression multi-band electromagnetic interference filtering system for unmanned aerial vehicles (UAVs) according to an embodiment of the present invention, as shown below. Figure 1 As shown, the active suppression multi-band electromagnetic interference filtering system for unmanned aerial vehicles (UAVs) according to an embodiment of the present invention specifically includes: The signal input unit 10 is connected to the interference identification unit and is used to receive input signals from multiple modules to be protected in the UAV system and transmit the input signals to the interference identification unit. Interference identification unit 12, connected to the signal input unit and the control processing unit, is used to monitor the spectrum information of the input signal in real time, identify the interference characteristics of the input signal, and send the identification result to the control processing unit. The interference characteristics include the interference frequency band and the interference intensity; specifically, they include: The Fast Fourier Transform (FFT) analysis module is connected to the signal input unit and the power detection module, and is used to perform frequency domain transformation on the input signal to obtain the signal's spectral information. A power detection module, connected to the FFT analysis module and the interference level assessment module, is used to detect the signal power of each interference frequency band based on the spectrum information. An interference level assessment module, connected to the power detection module, is used to compare the signal power with a preset threshold and determine the intensity level of the electromagnetic interference signal based on the comparison result.

[0017] The control processing unit 14 is connected to the interference identification unit and the active filtering unit, and is used to generate a corresponding filtering control command based on the identification result, and send the control command to the active filtering unit; The control and processing unit is implemented using a microcontroller unit (MCU), a field-programmable gate array (FPGA), or a dedicated digital processing chip.

[0018] The active filtering unit 16 is connected to the control processing unit and the signal output unit, and is used to dynamically adjust the filtering parameters according to the control command to suppress multi-band electromagnetic interference; wherein, the filtering parameters include the filtering frequency and the attenuation amount; The active filtering unit includes at least one of a varactor capacitor, an adjustable inductor, or an electronically controlled filter network.

[0019] The signal output unit 18 is connected to the active filtering unit and is used to output the filtered signal to the corresponding UAV module. The system further includes: The communication interface unit is connected to the control processing unit and is used to establish a data link with the UAV flight control system for remote parameter adjustment and status information uploading.

[0020] The following describes in detail the above-mentioned technical solution of the present invention with reference to the specific circumstances of the active suppression multi-band electromagnetic interference filtering system for unmanned aerial vehicles in the embodiments of the present invention.

[0021] This invention provides an active suppression multi-band electromagnetic interference filtering system for unmanned aerial vehicles (UAVs), comprising: 1. Signal input unit, connected to multiple modules to be protected in the UAV system; 2. Interference identification unit, used to monitor the spectrum information of the input signal in real time and identify potential interference frequency bands and intensities. It employs a Fast Fourier Transform (FFT) analysis module, a power detection module, and an interference level assessment module to achieve high frequency identification accuracy and fast response.

[0022] 3. Control processing unit: Generates corresponding filtering control commands based on interference identification results. This unit is implemented using an embedded processor, FPGA, or dedicated integrated chip.

[0023] 4. Active filtering unit: Dynamically adjusts the filtering frequency and attenuation according to control commands to achieve multi-band interference suppression. It is constructed using varactor capacitors, adjustable inductors, or electronically controlled filter networks, supporting switching or parallel operation between multiple target frequency bands.

[0024] 5. Signal output unit, which outputs the filtered signal to the corresponding module.

[0025] The key to the embodiments of the present invention lies in: 1. Active dynamic filtering mechanism: Unlike traditional passive filtering, it can dynamically adjust the filtering parameters (frequency, bandwidth, attenuation) according to the interference signal, and use adjustable capacitors, inductors or programmable networks to respond to the changing EMI environment in real time.

[0026] 2. Multi-band coverage capability: Supports simultaneous identification and processing of electromagnetic interference in multiple frequency bands, suitable for modules such as image transmission (2.4GHz / 5.8GHz), GPS (1.5GHz), and flight control, and can perform independent or combined suppression for different interference frequency bands.

[0027] 3. Interference detection and identification algorithm integration: The system integrates an FFT analysis module and an interference level assessment module to achieve high spectral resolution interference detection. It can quickly identify the type and intensity of interference, providing real-time basis for filtering strategies.

[0028] 4. Intelligent control mechanism of the control processing unit: Based on FPGA / MCU, it can convert detection data into specific control commands to realize closed-loop feedback of interference → identification → judgment → control → suppression.

[0029] 5. Adapted to the miniaturization and low power consumption design of drones: The module has a small overall size and low power consumption (<50mW), meeting the engineering requirements of drones for lightweight and high reliability.

[0030] Preferably, embodiments of the present invention also propose multiple sets of passive filters with switchable frequency bands: instead of using active components, passive LC filter groups of different frequency bands are switched under the control of the main control chip to achieve a similar "multi-band selection" effect.

[0031] Preferably, this embodiment of the invention also proposes a predictive filtering control based on AI interference prediction: using historical interference data + flight status + AI prediction model to predict the type of interference that may occur next, and then switching or adjusting the filtering parameters in advance.

[0032] Preferably, the present invention also proposes EMI active emission interference cancellation ("reverse interference"): similar to the "reverse wave interference method" of noise-canceling headphones, after detecting interference, the radio frequency module emits equal amplitude and opposite phase interference waves to cancel the intruding electromagnetic waves in the air.

[0033] Method Implementation Examples According to embodiments of the present invention, an active suppression multi-band electromagnetic interference filtering method for unmanned aerial vehicles (UAVs) is provided. Figure 2 This is a flowchart of the active suppression multi-band electromagnetic interference filtering method for unmanned aerial vehicles according to an embodiment of the present invention, as follows: Figure 2 As shown, the active suppression multi-band electromagnetic interference filtering method for unmanned aerial vehicles according to an embodiment of the present invention specifically includes: Step S201: Receive input signals from multiple modules to be protected in the UAV system through the signal input unit, and transmit the input signals to the interference identification unit; Step S202: The interference identification unit monitors the spectrum information of the input signal in real time, identifies the interference characteristics of the input signal, and sends the identification result to the control processing unit. Step S203: The control processing unit generates a corresponding filtering control command based on the recognition result and sends the control command to the active filtering unit. Step S204: The active filtering unit dynamically adjusts the filtering parameters according to the control command to suppress multi-band electromagnetic interference. Step S205: The filtered signal is output to the corresponding UAV module through the signal output unit; The method further includes: A data link is established with the UAV flight control system through the communication interface unit to remotely adjust parameters and upload status information.

[0034] The embodiments of the present invention are method embodiments corresponding to the system embodiments described above. The specific operations of each step can be understood by referring to the description of the system embodiments, and will not be repeated here.

[0035] In summary, the embodiments of the present invention achieve real-time suppression of the complex EMI environment encountered by UAVs during flight by integrating interference detection, active adjustment, and multi-band response capabilities. Its main advantages include: 1. Actively identify and suppress interference in different frequency bands, and dynamically adapt to changing environments; 2. Highly integrated design, adaptable to the size and power consumption limitations of drones; 3. Improve the stability and reliability of the communication, image transmission, and navigation modules of the UAV system; 4. Supports modular design, facilitating installation and maintenance.

[0036] Device Example 1 This invention provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, performs the steps described in the method embodiment.

[0037] Device Example 2 This invention provides a computer-readable storage medium storing an information transmission implementation program, which, when executed by a processor, performs the steps described in the method embodiment.

[0038] The computer-readable storage media described in this embodiment include, but are not limited to, ROM, RAM, disk, or optical disk.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An unmanned aerial vehicle active suppression multi-band electromagnetic interference filter system, characterized in that The system comprises: a signal input unit connected with the interference identification unit, configured to receive input signals from multiple modules to be protected in the unmanned aerial vehicle system and transmit the input signals to the interference identification unit; an interference identification unit connected with the signal input unit and the control processing unit, configured to monitor spectrum information of the input signals in real time and identify interference characteristics of the input signals, and send the identification results to the control processing unit; a control processing unit connected with the interference identification unit and the active filtering unit, configured to generate corresponding filtering control instructions according to the identification results and send the control instructions to the active filtering unit; an active filtering unit connected with the control processing unit and the signal output unit, configured to dynamically adjust filtering parameters according to the control instructions and complete suppression of multi-band electromagnetic interference; a signal output unit connected with the active filtering unit, configured to output filtered signals to corresponding unmanned aerial vehicle modules.

2. The system of claim 1, wherein, The system further comprises: a communication interface unit connected with the control processing unit, configured to establish a data link with the unmanned aerial vehicle flight control system to perform remote parameter adjustment and state information uploading.

3. The system of claim 1, wherein, The interference identification unit specifically comprises: a fast Fourier transform (FFT) analysis module connected with the signal input unit and the power detection module, configured to perform frequency domain transformation on the input signals to obtain spectrum information of the signals; a power detection module connected with the FFT analysis module and the interference level evaluation module, configured to detect signal power of each interference frequency band according to the spectrum information; an interference level evaluation module connected with the power detection module, configured to compare the signal power with a preset threshold and determine an intensity level of the electromagnetic interference signal according to a comparison result.

4. The system of claim 1, wherein, The control processing unit is implemented by a micro control unit (MCU), a field programmable gate array (FPGA) or a special digital processing chip.

5. The system of claim 1, wherein, The active filtering unit comprises at least one of a variable capacitance capacitor, an adjustable inductor or an electrically controlled filter network.

6. The system of claim 1, wherein, The interference characteristics include interference frequency bands and interference intensity. The filtering parameters include filtering frequency and attenuation amount.

7. A method for actively suppressing multi-band electromagnetic interference filtering of a drone, characterized in that The method comprises: receiving input signals from multiple modules to be protected in the unmanned aerial vehicle system through a signal input unit and transmitting the input signals to an interference identification unit; monitoring spectrum information of the input signals in real time through the interference identification unit and identifying interference characteristics of the input signals, and sending identification results to a control processing unit; generating corresponding filtering control instructions through the control processing unit according to the identification results and sending the control instructions to an active filtering unit; dynamically adjusting filtering parameters through the active filtering unit according to the control instructions and completing suppression of multi-band electromagnetic interference; outputting filtered signals to corresponding unmanned aerial vehicle modules through a signal output unit.

8. The method of claim 7, wherein, The method further comprises: establishing a data link with the unmanned aerial vehicle flight control system through a communication interface unit to perform remote parameter adjustment and state information uploading.

9. An electronic device, comprising: The method comprises: The memory, the processor and the computer program stored on the memory and capable of running on the processor, when the computer program is executed by the processor, implement the steps of the UAV active suppression multi-band electromagnetic interference filtering method according to any one of claims 7-8.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores an information transmission implementation program, and when the program is executed by the processor, the steps of the UAV active suppression multi-band electromagnetic interference filtering method according to any one of claims 7-8 are implemented.

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