Underwater Acoustic Source Localization using Closely-spaced Hydrophone Pairs

Abstract

A lot of array is available to estimate the underwater acoustic source localization. Source position is found by line array like the TASS, frank array using the beamforming and band analysis. In case of, LBL(Long Base Line), SBL(Short Base Line), USBL(Ultra Shortt Base Line) system are widely used for military, industrial purposes by accuracy of estimation take a advantage of pinger. In this study, closely-spaced hydrophone pairs array is proposed for underwater source position estimation. Array is composed of 3 pairs placed on equivalent line that are a coupled of closely-spaced hydrophone. The point of acoustic source is estimated by performing wavefront curvature analysis and geometry analysis[1,2,3]. Proposed array is not affected by multipath signal because of distance between closely-spaced sensor. The validity of the array is confirmed through the simulation which is use the acoustic signal synthesized by eigenray.