System and method for real-time detection and positioning of UAV based on acoustic array

Abstract

The invention discloses an unmanned-aerial-vehicle real-time detecting and positioning system and method based on sound arrays. The unmanned-aerial-vehicle real-time detecting and positioning system comprises at least two sound arrays and a PC terminal; the sound arrays are arranged in a cross-symmetrical mode, four sound sensors are symmetrically installed on each edge at intervals, and each sound array is provided with eight sound sensors; the PC terminal receives sound sensor signals collected by collecting cards, whether a target is an unmanned aerial vehicle or not is detected through the time-frequency analysis result, if the target is the unmanned aerial vehicle, one-dimensional arrival direction angle estimation is carried out on all linear arrays of the cross arrays respectively, and included angles of the target and two sides of the cross arrays are obtained; a coordinate of the unmanned aerial vehicle in space is calculated through the estimated angles of the multiple arrays and distances between the arrays. According to the unmanned-aerial-vehicle real-time detecting and positioning system and method based on the sound arrays, the sound arrays are reasonably put, the unmanned aerial vehicle can be rapidly detected, position information is obtained, and hidden danger caused by the unmanned aerial vehicle is effectively replied.

Description

technical field [0001] The invention relates to the field of positioning of moving objects, in particular to an acoustic array-based real-time detection and positioning system and method for unmanned aerial vehicles. Background technique [0002] In recent years, when UAVs quickly became a research hotspot, it also brought a series of problems, such as UAV black flying, seriously affecting regional security. Therefore, drone defense is becoming a new area of ​​focus for governments and military forces. Consumer-grade civilian drones are low in cost, easy to obtain, easy to operate, have a large number of users, and are difficult to supervise. They are easily used by criminals, which brings great pressure to security and confidentiality work. [0003] At present, the detection methods of drones mainly include radar, sound, video and radio frequency. The cost of radar is high, and it is difficult to detect low-altitude and slow flying objects; video can be used to identify d...

AI Technical Summary

Problems solved by technology

The cost of radar is high, and it is difficult to detect low-altitude and slow-speed flying objects; video can be used to identify drones, but it is difficult to locate, and there is image distortion at the same time, which affects the accuracy of positioning; radio frequency devices are mainly used for detection The radio frequency communication signal sent by the drone, but because the wireless signal in the environment is relatively complex, the energy of the radio frequency signal of the drone is small, and it is difficult to detect the drone

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