WO2020006668A1 - Electromagnetic interference-resistant unmanned aerial vehicle, and unmanned aerial vehicle inspection system - Google Patents

Abstract

An electromagnetic interference-resistant unmanned aerial vehicle (10), and an unmanned aerial vehicle inspection system. The electromagnetic interference-resistant unmanned aerial vehicle (10) comprises a flight control unit. The flight control unit comprises a microcontroller and a GPS module. The unmanned aerial vehicle (10) further comprises a band-pass/stop filter. The GPS module is electrically connected to the microcontroller by means of the band-pass/stop filter. The band-pass/stop filter is used to filter out signals within a specified frequency band. Provision of the band-pass/stop filter enables the unmanned aerial vehicle (10) to filter out signals within an interference frequency band, such that the unmanned aerial vehicle (10) has higher electromagnetic interference resistance and can fly in complicated electromagnetic environments.

Description

Anti-electromagnetic interference unmanned aerial vehicle and unmanned aerial vehicle reconnaissance system Technical field

The present invention relates to the field of reconnaissance technology, and in particular, to an unmanned aerial vehicle and an unmanned aerial vehicle reconnaissance system that are resistant to electromagnetic interference.

Background technique

The use of unmanned aerial vehicles (also known as drones) equipped with photoelectric monitoring modules for reconnaissance operations is a commonly used reconnaissance method. With the rapid development of the unmanned aerial vehicle industry, the unmanned aerial vehicle reconnaissance and combat environment has begun to expand to some remote and complicated electromagnetic environments. However, due to the lack of certain anti-interference capabilities, the current unmanned aerial vehicles have caused uncontrolled crashes due to electromagnetic interference. Sometimes it happens. Unmanned aerial vehicles that continue to work in complex electromagnetic environments can enrich application scenarios and enhance practical value. They have great application prospects and economic value in the field of intelligent security. They are important directions for the widespread promotion of unmanned aerial vehicles in the future. Therefore, how to enhance unmanned aerial vehicles The ability to resist electromagnetic interference is an urgent problem to be solved.

Summary of the invention

The purpose of the present invention is to improve the shortcomings in the prior art that currently do not have a device that can associate the vehicle with the identity information of the driver, and provide a vehicle identification certificate verification device that can combine the vehicle information with the identity of the driver Information is linked.

In order to achieve the foregoing objectives of the present invention, the embodiments of the present invention provide the following technical solutions:

An anti-electromagnetic interference drone includes a flight control unit, the flight control unit includes a microcontroller and a GPS module, and further includes a filter, and the GPS module is electrically connected to the microcontroller through the filter. The filter is used to filter out interference signals in a specified frequency band. The filter can be a band-pass filter or a band-stop filter.

In a further optimized solution, in the above-mentioned electromagnetic interference-resistant drone, there are two GPS modules. Two GPS modules are used, one as the main and the other as the auxiliary. When one of the GPS modules is disturbed, it can be corrected by the other GPS module, which enhances the reliability and safety of the UAV system.

In a further optimized solution, the electromagnetic interference-resistant UAV further includes a line-of-sight data communication unit. The line-of-sight data communication unit includes an antenna, and the antenna is connected to the device through a shielded cable. Because a lot of electromagnetic interference is conducted from the cable, here a shielded cable is used to connect the device to the antenna. This can effectively reduce the possibility of interference from the outside world and further enhance the ability of the UAV to resist electromagnetic interference.

In a further optimized solution, the line-of-sight data communication unit further includes a signal processing module, which is configured to amplify the received signal and then perform filtering processing. The signal processing module is used to amplify and then filter the received signal. Compared to a method in which the received signal is not processed, the signal is first amplified and then filtered to further remove the interference signal, making the signal cleaner and further enhancing the unmanned The machine's ability to resist electromagnetic interference.

On the other hand, an embodiment of the present invention also provides an unmanned aerial vehicle reconnaissance system, including the unmanned aerial vehicle in any one of the above schemes, and further includes a photoelectric monitoring module, which is mounted on the unmanned aerial vehicle, Perform image and / or video information acquisition. UAVs and photoelectric monitoring modules are used for reconnaissance operations, which can complete reconnaissance tasks in remote and harsh environments, and ensure the personal safety of reconnaissance personnel.

Compared with the prior art, by adding a band-pass / band-stop filter, the drone of the present invention can filter out signals in the interference frequency band, and then can enhance the anti-electromagnetic interference capability of the drone and realize flight in a complex electromagnetic environment. It can be applied to many fields such as urban public safety, national defense, public security patrol, complex environmental monitoring, and intelligent security, which not only expands the application range of the UAV industry, but also improves environmental adaptability, anti-interference ability and security, making it unmanned Aircraft industry promotion provides technical motivation.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solution of the embodiments of the present invention more clearly, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore are not It should be regarded as a limitation on the scope. For those of ordinary skill in the art, other related drawings can be obtained according to these drawings without paying creative work.

FIG. 1 is a schematic diagram of a drone reconnaissance system according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a structure of a flight control unit according to an embodiment of the present invention.

FIG. 3 is an electrical schematic diagram of the line-of-sight data communication unit in the embodiment.

Explanation of marks in the figure

UAV, photoelectric monitoring module 20, airborne line-of-sight data communication unit 30, ground line-of-sight data communication unit 40, UAV ground station 50, remote access terminal 60, server 70, remote control 80.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. The components of embodiments of the invention, generally described and illustrated in the figures herein, can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the present invention.

Referring to FIG. 1, a drone reconnaissance system is schematically provided in this embodiment, including a drone 10, a remote controller 80, a drone ground station 50, a server 70, and a remote access terminal 60.

On the one hand, the drone 10 can receive control signals transmitted by the remote controller 80 and perform corresponding flight operations.

On the other hand, the drone 10 may receive a control signal from the drone ground station 50 and perform a corresponding flight action. As shown in FIG. 1, the UAV ground station 50 is connected to the ground line-of-sight data communication unit 40 arranged on the ground through Ethernet, and the ground line-of-sight data communication unit 40 communicates with the airborne line-of-sight data communication unit 30 on the drone. Dedicated frequency band communication. The remote control command issued by the drone ground station 50 is transmitted to the flight control unit of the drone 10 through the dedicated uplink frequency band. The flight attitude and position information generated by the drone 10 during flight, and the image and / or video information collected by the photoelectric monitoring module 20 are also transmitted to the drone ground station 50 through the dedicated downlink frequency band, and the drone ground station 50 then It can be transmitted to the server 70 for storage, so that the remote access terminal 60 can be accessed remotely. The dedicated uplink frequency band or dedicated downlink frequency band here refers to a frequency band signal that is only used for communication between the ground station of the drone and the flight control unit of the drone, which meets the flight requirements.

Please refer to Fig. 2-3. The above-mentioned drone 10 is a drone with anti-electromagnetic interference capability. Specifically, the drone 10 includes an airborne line-of-sight data communication unit 30, a flight control unit, a rotor, and a fuselage. component. Among them, as shown in FIG. 2, the flight control unit includes a three-axis gyroscope, an accelerometer, a magnetic heading, an altitude sensor, a GPS module, a microcontroller, and a three-axis gyroscope, an accelerometer, a magnetic heading, and an altitude sensor. It is electrically connected to the microcontroller, and the GPS module is electrically connected to the microcontroller through a band-pass / band-stop filter. A three-axis gyroscope, an accelerometer, a magnetic heading, an altitude sensor, and a GPS module each collect flight attitude data when the drone is flying. The microcontroller can intelligently adjust the flight attitude of the fuselage based on these attitude data.

After research and analysis, the GPS module has the biggest impact on the drone, and if something goes wrong, the aircraft may crash. In this embodiment, by setting a band-pass / band-stop filter at the GPS module, the signals collected by the GPS module are filtered by the band-pass / band-stop filter, which can filter out interference signals in a specified frequency band, for example, 800 MHz with severe interference. The signal in the 2.7GHz band is filtered and then transmitted to the microcontroller. The microcontroller performs flight attitude adjustment based on the filtered signal, which can eliminate the influence of interference signals and improve the accuracy of GPS data. It can also fly normally in complex electromagnetic environment.

In addition, in order to further ensure the safety and reliability of UAV flight, dual GPS modules can be used. One GPS module is the main and the other GPS module is the auxiliary. When one of the two systems has signal interference, the other can correct it. Errors, such as error averaging and weighted correction.

As shown in Figure 2, the microcontroller is also connected with a low-voltage alarm module, which is used to monitor the remaining power of the power module and to issue an alarm signal when the voltage is lower than a set threshold, in order to charge or replace the battery in time to protect no one. The aircraft did not crash due to insufficient power during the flight.

Referring to FIG. 3, the line-of-sight data communication unit includes a video processing module, a signal processing module, an RF module, an RF front end, a power module, and an external interface module. Among them, the RF front end refers to a radio frequency module, which includes a power amplifier (short for power amplifier), a low-amplifier (short for low-noise amplifier), a duplexer, and an antenna. The power amplifier is used to amplify the transmitted signal, and the low-amplifier is used to amplify the received signal. The duplexer is used to isolate the transmitted and received signals, and the antenna is used to radiate electromagnetic wave signals and receive electromagnetic wave signals. The role of the RF module is to convert the baseband digital signal into a baseband analog signal, and then modulate the baseband analog signal onto a radio frequency carrier.

In addition, in this embodiment, the antenna is connected to the duplexer in the RF front end through a shielded cable. Because a lot of electromagnetic interference is conducted from the cable, here a shielded cable is used to connect the duplexer and the antenna. This can effectively reduce the possibility of interference from the outside world and further enhance the ability of the UAV to resist electromagnetic interference.

In addition, in this embodiment, after the signal processing module receives the signal output by the RF module, it first amplifies the received signal, and then performs filtering, spreading, and decoding processing. Compared with the conventional method, the received signal is only processed. In the decoding process, the signals are first amplified and then filtered, and the spreading operation further filters out the interference signals, making the signals cleaner and further enhancing the ability of the UAV to resist electromagnetic interference.

Based on the anti-interference ability and bandwidth advantage of H.265, in this embodiment, the video processing module uses Hisilicon Hi3516A chip to implement H.265 standard video encoding / decoding. The encoded constant current data is framed by FPGA and passed Downlink transmission is performed after LDPC coding, spread spectrum and UQPSK modulation.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present invention. It should be covered by the protection scope of the present invention.

Claims (10)

An anti-electromagnetic interference unmanned aerial vehicle includes a flight control unit. The flight control unit includes a microcontroller and a GPS module, and is further characterized by a filter. The GPS module is electrically connected to an office through the filter. The microcontroller is used for filtering out interference signals in a specified frequency band. The anti-electromagnetic interference drone according to claim 1, wherein the filter is a band-pass filter or a band-rent filter. The anti-electromagnetic interference unmanned aerial vehicle according to claim 1, wherein the interference signal of the specified frequency band is a signal of 800MHz-2.7GHz. The anti-electromagnetic interference drone according to claim 1, wherein there are two GPS modules. The anti-electromagnetic interference drone according to claim 1, further comprising a line-of-sight data communication unit, wherein the line-of-sight data communication unit includes an antenna, and the antenna is connected to the duplexer through a shielded cable. The unmanned aerial vehicle according to claim 5, wherein the line-of-sight data communication unit further comprises a signal processing module for amplifying the received signal and then performing filtering processing. The anti-electromagnetic interference unmanned aerial vehicle according to claim 1, wherein the flight control unit further comprises a low-voltage alarm module, and the low-voltage alarm module is electrically connected to the microcontroller. A drone reconnaissance system, comprising the drone according to any one of claims 1-7, and further comprising a photoelectric monitoring module, which is mounted on the drone and performs image and / or Or video information collection. The drone reconnaissance system according to claim 8, further comprising a server and a drone ground station, the server being electrically connected to the drone ground station, and information collected by the photoelectric monitoring module It is transmitted to the UAV ground station and server through the line-of-sight data communication unit. The drone reconnaissance system according to claim 9, further comprising a remote access terminal, the remote access terminal communicating with a server.

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