Underwater acoustic uniform linear array element serial number correction method

Abstract

The invention provides an underwater acoustic uniform linear array element serial number correction method. The underwater acoustic uniform linear array element serial number correction method comprises a test signal acquisition and storage process and a test signal phase difference measurement and array element number correction method process, utilizes the periodic characteristics of a phase difference, does not involve a complex calculation process, can complete array element serial number correction only through utilizing the periodic characteristics of the phase difference in a rotation angle region, is low in implementation cost, and has simple correction scheme. According to the underwater acoustic uniform linear array element serial number correction method, the requirement for theprecision of a rotating angle is not too precise, the rotating purpose is only to draw a phase difference curve which is complete enough to be used for period number measurement, and the method has high engineering practical value and low requirement for the precision of the pool rotating mechanism.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic array correction, and in particular relates to an array element number correction method of an underwater acoustic uniform linear array. Background technique [0002] Uniform line array plays a very important role in underwater acoustic sonar applications such as active sonar detection, passive sound source localization, and underwater acoustic imaging. The array flow pattern of the known uniform linear array is the most important guarantee condition for completing the above tasks. In actual engineering, the number of the array element is unknown in some scenarios (for example, the number of the array element is lost or the installation error of the wiring personnel of the array element, etc.), if the inaccurate array element number is directly used for related task processing, it will cause the array beam direction diagram Performance (-3dB beamwidth) drops and even leads to erroneou...

AI Technical Summary

Problems solved by technology

The method of the present invention utilizes the periodic characteristics of the phase difference curve, solves the problem of array element number correction, does not have too precise requirements on the accuracy of the rotation angle, and has low implementation cost, and the correction scheme is relatively simple

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