Improved Angle Measurement Methods for Reconnaissance Sonar Using Differential Pressure Vector Hydrophone
The differential pressure vector hydrophone is one of the existing reconnaissance sonar systems.Its angle measure-ment principle assumes that the array element distance is far less than the signal wavelength,which seriously affects the accuracy of angle measurement.Therefore,it is necessary to improve the angle measurement method of the differential pressure vector hydro-phone.Two improved methods of angle measurement are proposed in this paper.The first is the inverse polynomial fitting method of differential pressure vector amplitude ratio,which estimates the angle by using the inverse polynomial approximation of differential pressure vector amplitude ratio and angle function.The second is the information fusion method of phase comparison and angle mea-surement.The cosine dipole and sine dipole are used for phase comparison and angle measurement respectively,and the fusion ratio is determined by the estimated value of the angle to fuse the two-phase comparison results.The simulation results verify the effec-tiveness of the two proposed methods.
万方数据
维普
