Beam-forming Technology Research Based On Acoustic Array

Beam-forming technology based on acoustic array has important application in Sonar system, acoustic imaging system and under water weapon test system.This paper focuses on beamforming technology research about acoustic array. Through the use of acoustic aperture theory, linear aperture beamforming is analyzed; On the basis of further study about linear array beamforming relations between array element number, spacing and frequency, beam scanning and array focusing of the line array are simulated; The impact of tiny disturbance of working frequency on array beamforming is analyzed. The impact of tiny disturbance of position about a single sensor in the array on array beamforming is mainly discussed. Diagram about relationship between Phase-array element with the sensor phase compensation and the horizontal disturbance and vertical perturbation is obtained.According to the important influence about relative position accuracy between array and detected target, methods about time-delay estimation is studied by using beam forming and array focusing about acoustic array. Time-delay estimation based on second correlation and time-delay estimation based on HTT are proposed in strong noisy environment. Effectiveness of the time-delay estimation methods are verified by experiment.Based on these studies, experiment simulation about energy synthesis of distributed explosive array on the base of array node localization is completed.