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A low-altitude unmanned aerial vehicle passive acoustic detection and positioning device

A technology for detection devices and drones, which is applied in the direction of measuring devices, positioning, radio wave measurement systems, etc., can solve problems that do not involve drone type recognition processing, and the recognition accuracy needs to be further improved, so as to improve strength and strengthen monitoring Ability, high detection and positioning accuracy

Active Publication Date: 2020-06-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Claims
  • Application Information

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Problems solved by technology

Different from the principle of active detection such as radar, the passive detection system does not emit signals, but receives the signals from the target to determine the parameters of the target. type recognition processing

Method used

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  • A low-altitude unmanned aerial vehicle passive acoustic detection and positioning device
  • A low-altitude unmanned aerial vehicle passive acoustic detection and positioning device
  • A low-altitude unmanned aerial vehicle passive acoustic detection and positioning device

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Embodiment Construction

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0025] Due to the low flying altitude and speed of consumer drones and other targets, and the small radar cross-section, their detection capabilities will be greatly reduced. Under the influence of ground clutter and ground reflected wave interference, most radars basically lose the ability to accurately detect slow and small flying targets such as drones. The present invention is based on an acoustic detection device, by receiving radiated acoustic signals of slow and small flying targets such as drones, and using a compressed sensing signal processing method to estimate the direction of arrival (DOA) of the target, thereby judging the position of the target.

[0026] The system principle block diagram of the low-altitude unmanned aeri...

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Abstract

The invention discloses a low-altitude unmanned aerial vehicle passive acoustic detection device, comprising an acoustic sensor array detection module, a multi-channel data acquisition module, a signal preprocessing module, an Ethernet transmission module, an embedded processing module, a display and control module, and a voice alarm module. The acoustic sensor array detection module is used to receive the acoustic signal, the multi-channel data acquisition module is used to convert the collected acoustic signal into a digital signal, the signal preprocessing module is used to filter and reduce the noise of the signal, and transmit it through the Ethernet transmission module To, the embedded processing module is used to realize signal processing and host computer information processing, the display and control module is used to display detection information and issue relevant instructions to the alarm and countermeasure system, and the voice alarm module is used to broadcast real-time detection and positioning information by voice. The invention has the characteristics of high detection and positioning accuracy, can detect and display the position, quantity and type of slow and small flying targets such as consumer grades invading the airspace in real time, and improves the strength of low-altitude early warning and defense.

Description

technical field [0001] The invention relates to a device for detecting drones, in particular to a passive acoustic detection and positioning device for low-altitude drones. Background technique [0002] In recent years, due to the advantages of relatively low manufacturing cost, no risk of casualties, and convenient use of drones, the drone industry has developed rapidly, and has a wide range of applications in logistics, entertainment, search and rescue, etc. Generally, the flight altitude below 1km belongs to the low-altitude range, and my country has opened part of the low-altitude airspace below 1km. However, due to the immature laws and regulations related to this in our country and the lack of monitoring methods for drones, the problem of unlicensed drone flying in low-altitude open conditions has become an international social problem. On April 14, April 17, April 18, and April 21, 2017, the Chengdu area was disturbed by unmanned aerial vehicle activities, causing la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 陈敏徐利梅李学生谢晓梅黄强宋达高家葵刘韦伯覃涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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