A Depth Estimation Method for Vector Hydrophone Deployment

Abstract

The invention discloses a method for estimating the deployment depth of a vector hydrophone. The method comprises: receiving time-domain signals of broadband sound pressure radiated by a sound source and three-component particle vibration velocity, and processing the time-domain signals to obtain x, y and z Acoustic energy flow in three directions; use the acoustic energy flow in the x direction and y direction to estimate the azimuth angle of the sound source and synthesize the horizontal acoustic energy flow; estimate the arrival angle of the sound source by the ratio of the acoustic energy flow in the z direction and the horizontal acoustic energy flow ;According to the estimated value of the arrival angle of the sound source, combined with the sound velocity profile, calculate the time delay template value of the direct wave and the bottom reflection wave corresponding to the depth of the hydrophone of different vectors under the arrival angle; obtain the estimated arrival time delay value of the direct wave and the bottom reflection wave ; Calculate the difference between the estimated arrival time delay of the direct wave and the seabed reflected wave and the delay template value, and use the depth corresponding to the delay template value with the smallest difference as the estimated value of the vector hydrophone deployment depth.

Description

technical field [0001] The invention relates to the technical fields of underwater acoustic detection and sonar, in particular to a method for estimating the deployment depth of a vector hydrophone. Background technique [0002] In sea trials and engineering applications, the actual deployment depth of vector hydrophones is generally measured by the pressure sensor bound together, but the measurement accuracy is proportional to the depth, and the depth measurement error is large when deployed at a large depth. [0003] The error between the actual deployment depth of the vector submersible buoy system and the measurement depth of the pressure sensor will seriously reduce the performance of target detection and positioning. Contents of the invention [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 shi...

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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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