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Small rotor unmanned aerial vehicle target detection method based on multi-pulse accumulation

A technology of unmanned rotor and target detection, which is applied in the field of UAV detection, can solve the problems of weak radar echo signal and complex clutter background, and achieve the effects of improving detection ability, strong portability and flexibility

Active Publication Date: 2021-03-09
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0011] The present invention provides a small rotor UAV target detection method based on multi-pulse accumulation, which solves the problems of weak radar echo signal and complex clutter background, can increase the output SNR of UAV targets, reduce costs, and improve flexibility Enhanced portability and improved radar system detection capabilities for small rotor UAV targets

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  • Small rotor unmanned aerial vehicle target detection method based on multi-pulse accumulation

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[0062] The above-mentioned content of the present invention will be further described in detail below in conjunction with the specific implementation manners of the examples. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following examples. Without departing from the above-mentioned technical idea of ​​the present invention, various replacements or changes made according to common technical knowledge and customary methods in this field shall be included in the scope of the present invention.

[0063] Such as figure 1 Shown the flow chart that the multi-frame data trace accumulation of the present invention realizes, comprises:

[0064] A. The radar transmits a chirp signal, and performs coherent accumulation of single frame data after down-conversion and pulse compression, and obtains the coherent accumulation result of the i-th frame data C i ;

[0065] B. Use the CFAR method to get the det...

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Abstract

The invention relates to a small unmanned gyroplane target detection method based on multi-pulse accumulation, and the method comprises the steps: dividing radar receiving data into N frames, whereineach frame comprises M pulses; then introducing generalized Radon-Fourier transform to eliminate distance unit migration caused by target motion of the small-sized rotor unmanned aerial vehicle, achievingg target energy coherent accumulation of single-frame data, and filtering bottom noise by utilizing CFAR to obtain target trace point information; finally, in combination with the established state transition equation, target plot accumulation of the small unmanned gyroplane is achieved through a tracking-before-detection method, clutters are restrained, and therefore target detection and tracking of the small unmanned gyroplane are achieved. According to the invention, the problems of weak radar echo signals, complex clutter background and the like can be solved; by increasing the outputSNR of the unmanned aerial vehicle target, the cost is reduced, the flexibility is improved, the transportability is enhanced, and the detection capability of the radar system for the small rotor unmanned aerial vehicle target can be improved.

Description

technical field [0001] The invention relates to the technical field of unmanned aerial vehicle detection, in particular to a method for detecting a target of a small rotor unmanned aerial vehicle based on multi-pulse accumulation. Background technique [0002] With the development of drone technology, drones are becoming more and more popular, and due to the development of modern technology, drones are developing towards miniaturization and miniaturization. [0003] In real life, micro-drones are becoming more and more popular. Due to their small size, simple operation, low flying height, and many occlusions, it is difficult to detect them by previous detection methods. [0004] Therefore, it is urgent to master effective discovery and detection methods, solve the problem of UAV supervision and control, and ensure the safety of low-altitude airspace. [0005] There are mainly five methods for target detection and discovery of small rotor UAVs, as follows: [0006] Method 1...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 肖国清方鑫葛亮陈春燕陈春林
Owner SOUTHWEST PETROLEUM UNIV