Research on near field acoustic source localization algorithm based on arbitrary planar vector array

Qing Ji,Da Wei Xiao,Jin Fang Cheng

doi:10.21595/vp.2017.18983

Abstract

In order to solve the problem of near acoustic target location, vector hydrophone array with arbitrary formation is proposed to locate near field acoustic source. In this paper, firstly, the near field measurement model of vector hydrophone array is derived detailed. Then, introduces the conventional beamforming and MVDR algorithm based on vector hydrophone array. Finally, the performance of the algorithm is verified by simulation. The results show that the vector MVDR has higher target resolution, and the error decreases with the increase of SNR. It is more suitable for underwater near field regional warning.

Highlights

In recent years, with the rapid development of underwater robot technology, especially unmanned underwater vehicles (UUV) has the advantages of small volume, flexible applying, is often able to work at near area of the port or island, has become an important carrier to collect hydrological data and intelligence
The near field beamforming algorithm based on arbitrary planar formation vector hydrophone array is studied, which provides a new idea for the localization of acoustic source in near field, and is more suitable for practical application in Engineering
In order to better contrast the performance of the four kinds of algorithms, when the signal-to-noise ratio (SNR) = 0 dB, the average spatial spectrum is obtained by 100 Monte Carlo simulations

Summary

Introduction

With the rapid development of underwater robot technology, especially unmanned underwater vehicles (UUV) has the advantages of small volume, flexible applying, is often able to work at near area of the port or island, has become an important carrier to collect hydrological data and intelligence. It is more and more urgent to build a near field underwater warning system by using acoustic sensors array in the important islands or ports. At this point, the acoustic sensor is required to locate the target in a relatively near area, and achieve the goal of damage. The near field beamforming algorithm based on arbitrary planar formation vector hydrophone array is studied, which provides a new idea for the localization of acoustic source in near field, and is more suitable for practical application in Engineering

Near field measurement model of vector array

Near field vector conventional beamforming

Near field vector MVDR beamforming

Simulation 1

Simulation 2

Conclusions