Target locating method, target locating device and target locating system

Abstract

Embodiments of the invention disclose a target locating method, a target locating device and a target locating system. The method disclosed by one embodiment of the invention comprises the following steps: acquiring angle data of m targets collected by n acoustic detectors; in the angle data of the m targets, using a cross locating algorithm to determine an intersection coordinate set according to the angle of all the targets in the angle data of the m targets; judging whether each intersection coordinate in the intersection coordinate set is effective to obtain an effective intersection coordinate set; calculating the distribution density and the dispersion degree of each intersection in the effective intersection coordinate set; determining the intersections of which the distribution density is within a preset first range and the dispersion degree is within a preset second range in the effective intersection coordinate set as a point set of the same target; determining the point sets of the multiple targets; and for each target point set in the point sets of the multiple targets, calculating the target point set by use of the maximum likelihood method, and finally aggregating the target point sets into the coordinate of one aggregation point. By implementing the embodiments of the invention, the accuracy of target locating is improved.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a method, device and system for target positioning. Background technique [0002] Our country has a vast territory, and important defense targets are distributed across the country. They are easily attacked by high-tech aircraft such as armed helicopters, cruise missiles, and unmanned aircraft. It is urgent to establish a low-altitude target detection and early warning network to protect important areas. [0003] In recent years, with the gradual maturity of acoustic detection technology, its unique advantages in low-altitude or ultra-low-altitude target detection have gradually emerged, and the acoustic detector networking system is an important application, and the acoustic detector networking system is used to monitor a certain In the airspace, the acoustic detector networking system can use the sound information emitted by the target to realize detection and early warning. ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, during the detection process of the target by the acoustic detector network system, due to the slow transmission speed of the sound wave in the air (the speed of sound in the air is about 340m / s), the sound waves radiated by the same target at the same space point The time of propagation to each acoustic detector may differ by many seconds, causing errors in target location

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