Multi-rotor unmanned aerial vehicle identification method based on rotor micro Doppler characteristics

A multi-rotor unmanned aerial vehicle, Doppler characteristic technology, applied in radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problem of lack of identification of multi-rotor small UAV, and achieve The effect of quick recognition

Active Publication Date: 2017-09-15
成都电科智达科技有限公司
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Problems solved by technology

[0009] What the present invention aims to solve is to provide a multi-rotor unmanned aerial vehicle identification method based on rotor micro-Dopple

Method used

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  • Multi-rotor unmanned aerial vehicle identification method based on rotor micro Doppler characteristics
  • Multi-rotor unmanned aerial vehicle identification method based on rotor micro Doppler characteristics
  • Multi-rotor unmanned aerial vehicle identification method based on rotor micro Doppler characteristics

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[0037] The technical solution of the present invention will be described in detail below in conjunction with the drawings:

[0038] The mathematical model used in the present invention is:

[0039] When the radar transmits a frequency signal, the signal received by the radar is:

[0040]

[0041] Where c represents the speed of light, f 0 Indicates the radio frequency point of the radar, if the pitch angle β and the height of the rotor blade z are not considered 0 ,Have

[0042] Such as figure 1 Shown, R p (t) represents the distance from a point P on the rotor to the radar at time t, where R 0 Indicates the distance from the radar to the center of the rotor, l p Indicates the distance from point P to the center of the rotor, Indicates the initial angle of the blade, and Ω represents the rotational angular velocity of the blade. If the pitch angle β and the rotor height z 0 Is not 0, then The corresponding demodulated baseband signal received is:

[0043]

[0044] The blade of a mu...

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Abstract

The invention belongs to the technical field of radar target identification and particularly relates to a multi-rotor unmanned aerial vehicle identification method based on rotor micro Doppler characteristics. According to the technical scheme of the invention, the multi-rotor unmanned aerial vehicle is detected mainly through a radar, micro Doppler characteristics of the rotor are extracted according to received multi-rotor unmanned aerial vehicle echo signals, parameters such as the rotor number of the target multi-rotor unmanned aerial vehicle, the rotation speed of the rotor and the blade length are acquired, and identification on the multi-rotor unmanned aerial vehicle is thus realized. The method has the beneficial effect of quickly identifying the multi-rotor unmanned aerial vehicle.

Description

technical field [0001] The invention belongs to the technical field of radar target recognition, and in particular relates to a multi-rotor unmanned aerial vehicle recognition method based on rotor micro-Doppler features. Background technique [0002] With the continuous maturity of drone technology and the sharp drop in the price of related products, various types of drones have been used in different fields. So while drones bring convenience to people, they have also become criminal tools in the hands of criminals. Due to the lack of regulatory control measures for drones, the phenomenon of drone abuse and illegal flying is becoming more and more serious. Facing the threat of such targets, there is no effective means of detection and identification at present. [0003] Today, multi-rotor small UAVs are not only easy to control, can take off and land vertically, and can easily hover in the air after takeoff, but also have the advantage of high serviceability, that is, whe...

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Application Information

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IPC IPC(8): G01S13/88G01S7/41G01S7/40
CPCG01S7/4052G01S7/41G01S13/88
Inventor 曹宗杰
Owner 成都电科智达科技有限公司
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