Rotorcraft early-warning device and method

A technology for rotorcraft and early warning devices, which is applied to measurement devices, instruments, radio wave measurement systems and other directions to achieve the effect of avoiding interference

Pending Publication Date: 2015-12-30
高域(北京)智能科技研究院有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The inventor of the present application has noticed that in order to generate enough thrust for a multi-rotor UAV, the motor and blades need to rotate at a very high spe

Method used

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  • Rotorcraft early-warning device and method
  • Rotorcraft early-warning device and method

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Experimental program
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Embodiment Construction

[0058] Embodiments of the present invention describe a rotorcraft early warning device, such as figure 1 The rotorcraft early warning device shown includes a plurality of sound processing modules 1 and positioning processing modules 2 .

[0059] The sound processing module 1 includes a sound sensor 3 for collecting sound analog signals, a sound spectrum subtraction filter module 4 and an abnormal endpoint detection module 5 .

[0060] The sound spectrum subtraction filter module 4 includes the A / D conversion unit 6 that converts the sound analog signal into a sound digital signal, the band-pass filter unit 7 that band-pass filters the sound digital signal, and analyzes the sound digital signal of each frame. The windowing and framing processing unit 8 that performs Hamming window filter processing on each frame, the abnormal endpoint detection module 5 determines that one of the short-term average amplitude of the sound and the short-term zero-crossing rate of the sound exceed...

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Abstract

A rotorcraft early-warning device comprises a plurality of sound processing modules (1) and a positioning processing module (2); abnormal end point detection modules (5) are used for judging one of a sound short time average amplitude and a sound short time zero-crossing rate which exceed a threshold as abnormal sounds; the positioning processing module (2) comprises a time delay calculating unit (9) used for calculating a time delay difference that signals of the same sound source reach two sound processing modules (1), an angle calculating unit (10) used for determining a sound source directional angle according to the time delay difference and a geometrical relationship among intervals of the sound processing modules and a sound source positioning unit (11) used for positioning a sound source through combination of multiple groups of sound processing modules; the sound source positioning unit (11) is used for clustering according to an azimuth angle theta, selecting a sound source azimuth angle theta judged by two groups of sound processing modules with highest noise power after clustering as a final sound source direction, displaying the sound source position on an electronic map and giving an alarm.

Description

technical field [0001] The invention belongs to the field of aircraft early warning, in particular to the early warning of unmanned aircraft, and in particular to a rotorcraft early warning device and an early warning method. Background technique [0002] The current rotorcraft has begun to widely intervene in the daily life of the masses. Because the rotorcraft can take off and land straight up and down, and can hover in the air, the flight is more flexible. Compared with the traditional fixed-wing aircraft, the rotorcraft has its own characteristics and has been widely used. The existing regulations are not perfect for flight management in the field of general aviation, but for rotorcraft that fly at low altitudes and are often within the visual range, the current supervision is still blank. [0003] Although the rotorcraft has begun to give consumers a new experience in aerial photography, logistics, patrol, etc., and has a wide range of application prospects, but at the...

Claims

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Application Information

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IPC IPC(8): G01S5/20
CPCG01S5/20
Inventor 陈昊
Owner 高域(北京)智能科技研究院有限公司
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