Application of sound ray correction algorithm based on spatial scale in long baseline underwater acoustic positioning system

Abstract

The invention relates to a sound ray correction method, in particular to application of a sound ray correction algorithm based on a spatial scale to a long baseline underwater acoustic positioning system. By knowing the depths of a transponder and an underwater target, according to the vertical distance simplification principle, the sound velocity profile is simplified, redundant repeated data which can generate interference are abandoned, data which are obvious in change and have calculation value are reserved, calculation iteration of sound ray correction is greatly reduced, rapid simplification operation is achieved, and the data processing efficiency of sound ray tracking is obviously improved. The simplified sound velocity profile is layered on the spatial scale, and the non-uniform spatial distribution of seawater is further considered, so that the method is more in line with the actual scene.

Description

technical field [0001] The invention relates to a sound ray correction method, in particular to the application of a sound ray correction algorithm based on a spatial scale to a long baseline underwater acoustic positioning system. Background technique [0002] The long baseline underwater acoustic positioning system is one of the most commonly used underwater acoustic positioning methods in the deep sea environment. It is widely used in marine engineering and marine scientific research such as underwater precision construction, tracking and positioning of various underwater submersibles, and monitoring of seabed plate movement. middle. [0003] The working principle of the long-baseline hydroacoustic positioning system is as follows: the interrogation signal sent by the positioned target is transmitted to the base array of the submarine transponder, and the subsea transponder receives the interrogation signal and resends the positioning signal to the positioned target. By ...

AI Technical Summary

Problems solved by technology

If the average sound velocity or an incorrect sound velocity profile is used, the measurement results will be offset, the positioning accuracy will be reduced, and the outlier value will appear in the positioning point. Therefore, it is necessary to study the impact of sound ray bending on the long-baseline hydroacoustic positioning system And how to correct this effect is of great significance to improve the accuracy of long baseline underwater acoustic positioning system

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