Acoustic propagation path comprehensive speed measuring method and apparatus for underwater target positioning

Abstract

The invention discloses an acoustic propagation path comprehensive speed measuring method and apparatus for underwater target positioning. According to the method, the comprehensive speed is measured instead of the conventional acoustic speed, and thus the underwater target positioning accuracy is improved. The apparatus includes an emission module, an array reception module, a control module, a storage module and a central processing module. The control module is connected to the emission module, the array reception module, the storage module and the central processing module. The emission module is connected to the array reception module, the control module and the central processing module. The array reception module is connected to the emission module and the control module. The central processing module is connected to the control module, the emission module and the storage module. The storage module is connected to the control module and the central processing module. The method is different from a conventional underwater target positioning measurement method, a seawater acoustic speed empirical formula and a Doppler effect are utilized for speed measuring, environment variables such as the temperature, salinity, depth and flow speed of seawater are comprehensively taken into consideration, and high precision is exhibited.

Description

technical field [0001] The invention relates to the technical field of velocity measurement, in particular to a method and device for measuring the comprehensive velocity of an acoustic propagation path for underwater target positioning. Background technique [0002] Underwater acoustic detection is the basic means to obtain ocean information, and detection accuracy is the fundamental goal of underwater acoustic detection. A key technology of underwater acoustic detection is underwater target positioning, and information such as distance and azimuth of underwater targets can be obtained from the positioning. However, underwater target positioning is subject to sound velocity changes caused by water flow, pressure, temperature, salinity, etc., resulting in inaccurate final positioning. These effects exist in both medium and long-range detection and short-range detection. [0003] At present, in seawater, sonar devices are mainly used to measure various acoustic characteristi...

AI Technical Summary

Problems solved by technology

In recent years, some scholars have also studied the sound velocity correction method to improve the positioning accuracy of underwater targets. Line refraction correction methods, but these methods have a large amount of calculation, and the influence of the water flow field is not considered when correcting the measurement. This is one of the reasons for the frequency shift of the sound wave, so it also affects the measurement accuracy.

Images