Underwater explosive source localization based on semi empirical relationships and matched field processing

Efficiently estimating the exact location of explosives has considerable significance in sound exposure level measurement and acoustic propagation.To solve the problem of low positioning efficiency and accuracy using the signal received by a single hydrophone,a quick localization method based on semi-empirical theory and the Matched Field Processing(MFP) method is proposed.Semi-empirical relationships can be used to reduce the searching area to increase the efficiency of the localization.The accuracy of the localization estimation can be increased by adding additional matching parameters,such as the period of the bubble pulse and the peak pressure of the shock wave based on semiempirical relationships.Both the simulation results and the data from underwater explosion measurements verify that the joint of multiple-path time delays and the bubble pulse period can estimate the explosive depth accurately.Further,the combination of multiple-path time delays and the peak pressure can estimate the range accurately.Compared with the traditional MFP based on multiple-path time delays,the proposed joint method can implement quick and accurate localization with a single hydrophone.