An Azimuth Self Correction of Combined Vector Underwater Acoustic Sensor

Abstract

This paper introduces an independent orientated magnetism-multiple three-dimensional MEMS vector hydrophone that can be used for target differentiating. The vector hydrophone is designed by a three-dimensional accelerometer and magnetism sensor. The accelerometer is close mounted to the signal processor so that the noise can be reduced and signal attenuation can be restrained. Since the single vector hydrophone cannot achieve a high orientate precision, it is solved by this magnetism-multiple three-dimensional vector hydrophone. The vector hydrophone has been finished the underwater standing wave field test and the non-magnetism rotate platform test. The testing result validates adopting magnetism sensor to compensate the direction of vector hydrophone is feasible. The vector hydrophone which can be used to pinpoint the underwater target and implement acoustic detection, underwater orientation and navigation represents the characters as small size, simple structure, high stability and reliability.