Method for estimating laying depth of vector hydrophone

Abstract

The invention discloses a method for estimating the laying depth of a vector hydrophone, and the method comprises the steps: receiving time domain signals of broadband sound pressure and three-component particle vibration velocity radiated by a sound source, and processing the time domain signals to obtain sound energy flows in x, y and z directions; estimating a sound source azimuth angle by using the sound energy flows in the x direction and the y direction and synthesizing a horizontal sound energy flow; estimating the sound source arrival angle according to the ratio of the sound energy flow in the z direction to the horizontal sound energy flow; calculating time delay template values of direct waves and seabed reflected waves corresponding to different vector hydrophone depths under the arrival angle according to the sound source arrival angle estimated value and the sound velocity profile; obtaining an arrival time delay estimation value of the direct wave and the seabed reflected wave; and calculating the difference value between the arrival time delay estimation value of the direct wave and the seabed reflection wave and the time delay template value, and taking the depth corresponding to the time delay template value with the minimum difference value as the laying depth estimation value of the vector hydrophone.

Description

Technical field [0001] The present invention relates to the field of water sound detection and sonar, and more particularly to a vector water hearing depth estimation method. Background technique [0002] In a sea trial and engineering application, the actual depth of vector aqueous hearing is generally obtained by a pressure sensor that is bound to, but the measurement accuracy is relatively larger than the depth, and the depth measurement error is large when the large depth placement is large. [0003] The error of the actual placement depth and pressure sensor measurement depth and pressure sensor will seriously reduce the performance of target detection and positioning. Inventive content [0004] In order to avoid the deficiencies of the prior art, the present invention proposes a vector hydrophone placed depth estimation method based on the deep sea water vessel sound field to reach the structure to solve the depth of the plazening requires the pressure sensor measurement a...

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Problems solved by technology

[0004] In order to avoid the deficiencies of the prior art, the present invention proposes a method for estimating the deployment depth of vector hydrophones based on the multi-way arrival structure of the deep sea surface ship sound field, to solve the problem that the deployment depth needs to be obtained by pressure sensor measurement and the error increases with depth. big and growing problem

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