Orientation estimation method for single two-dimensional differential pressure type vector hydrophone

Abstract

The invention discloses an orientation estimation method for a single two-dimensional differential pressure type vector hydrophone. The method can obtain the oriented vector of a corrected differential pressure type vector hydrophone according to the central frequency of a two-dimensional differential pressure type vector hydrophone system and the distance between diagonal array elements. The method can use the corrected oriented vector and noise subspace output by a two-dimensional differential pressure type vector to obtain a spatial spectrum of the single two-dimensional differential pressure type vector hydrophone. The method can estimate target orientation through spectral peak searching. The method has the advantages of achieving accurate orientation estimation on a weak target and having significance on water sound detection, underwater location and navigation. The method can still keep good orientation estimation performance when the radius of the two-dimensional differential pressure type vector hydrophone is not within a certain limit that r is smaller than or equal to 0.1 lambda and can expand the work frequency range of the differential pressure type vector hydrophone.

Description

technical field [0001] The present invention relates to a method for estimating the azimuth of a single two-dimensional differential pressure vector hydrophone, specifically a method when the radius r of the differential pressure vector hydrophone does not satisfy r≤0.1λ (λ is the signal wavelength ), using a single two-dimensional differential pressure vector hydrophone to estimate the target azimuth. Background technique [0002] The vector hydrophone is a new type of composite sensor for obtaining underwater acoustic information. In theory, a single vector hydrophone can achieve three-dimensional orientation in space. The methods for single-vector hydrophone azimuth estimation include average sound intensity method, complex sound intensity method, cross-spectrum estimation method and high-resolution MUSIC algorithm, etc. When the receiving signal-to-noise ratio of the vector hydrophone is relatively high, the above method can accurately estimate the orientation of the t...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency that the existing technology cannot accurately detect and estimate the orientation of the target signal when the approximate condition of r≤0.1λ is not satisfied, and to provide a simple, practical and robust two-dimensional differential pressure vector Estimation Method of Hydrophone Azimuth

Images