Pool testing method of low-frequency acoustic directivity of large submerged buoy vector hydrophone

Abstract

The invention provides a pool testing method of low-frequency acoustic directivity of a large submerged buoy vector hydrophone. The pool testing method comprises the steps of (1) placing a submerged buoy system to the center of a pool, placing a low-frequency / very-low-frequency acoustic source to a position which enables the vector hydrophone in the submerged buoy system to be positioned in an acoustic source near field and the center of the vector hydrophone and the acoustic source to be positioned at the same placing depth, wherein the sound filed at the position of the vector hydrophone expands in a spherical wave mode; (2) determining the range of a rotary angle of the submerged buoy system according to the dimension of the submerged buoy system and equivalent conditions of testing results of the spherical wave and testing results of a plane wave; and (3) enabling the whole submerged buoy system to rotate at a low speed, recording signals when emission frequency of a sound pressure channel of the vector hydrophone is f0 in real time, and performing post-processing to obtain low-frequency / very-low-frequency acoustic directivity of the submerged buoy vector hydrophone. By means of the pool testing method, the testing of the acoustic directivity of the complicated vector hydrophone system can be achieved in a high precision mode in the pool which can be controlled easily, and accordingly, the requirements of further research are met.

Description

technical field [0001] The invention relates to an underwater acoustic testing method, and mainly relates to a method for testing the acoustic directivity of a vector hydrophone system working on a large-scale submerged buoy under the condition of a pool. Background technique [0002] The test of the acoustic directivity of the existing vector hydrophone is mostly to test whether the dipole directivity of the vector hydrophone itself meets the requirements. , standing wave tube and external field. However, the test of the acoustic directivity of vector hydrophones working in complex systems (such as large submersible buoys, buoys, etc.) is rarely introduced publicly. The invention discloses a method for testing the low-frequency and very low-frequency acoustic directivity of the overall system of a vector hydrophone working on a large submersible target under the condition of a pool. [0003] The acoustic directivity of the vector hydrophone system reflects the overall spa...

AI Technical Summary

Problems solved by technology

If the auxiliary facilities are improperly designed and installed improperly, it may affect the dipole directivity of the system vector hydrophone itself

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