Method and system for locating underwater target

Abstract

The invention provides a method and system for locating an underwater target. The method comprises the steps of acquiring an underwater acoustic signal sent by a signal source, and acquiring the underwater acoustic signal intensity of the current position of a target; calculating the distance between the target and the signal source on the basis of a slope correction algorithm and an attenuation value of the underwater acoustic signal intensity; utilizing an inertial navigation technology to calculate the estimated position of the target, and utilizing the distance to correct the target movingposture position of the estimated position in order to obtain the corrected position of the target; setting a corresponding weight value based on the precision of the estimated position and correctedposition, and carrying out weighted least squares calculation on the estimated position and the corrected position to obtain position information of the target. Through the weighted least squares calculation of the estimated position and corrected position, the underwater locating precision is greatly improved; compared with existing SINS-based track estimation locating, the method and the systemhave the advantages of more accurate locating effect.

Description

[0001] This application claims the priority of the Chinese patent application submitted to the China Patent Office on June 27, 2019, with the application number 201910566875.0 and the title of the invention "A method and system for positioning underwater targets", the entire content of which is incorporated by reference incorporated in this application. technical field [0002] The invention relates to the technical field of underwater acoustics and signal processing, in particular to a positioning method and system for underwater targets. Background technique [0003] In recent years, with the rapid development of electronic technology and the accelerated pace of underwater development, underwater unmanned aerial vehicles have been widely used, whether it is underwater detection, underwater combat, seawater underwater reconnaissance. In practical applications, underwater unmanned vehicles often need to achieve long-term self-positioning functions, and the time may be as lon...

AI Technical Summary

Problems solved by technology

However, with various changes in the environment, the established equation itself will often bring great errors, which in turn affects the effect of the algorithm itself.

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