Method for calibrating phase consistency between underwater acoustic array channels based on motion sound source

Abstract

The invention discloses a method for calibrating phase consistency between underwater acoustic array channels based on a motion sound source, relates to an external field calibration method for phaseconsistency between underwater acoustic array channels, and belongs to the field of parameter estimation. The problem that when the phase between the underwater array channels is calibrated under theexternal field condition, the phase calibration precision between the array channels is poor due to the fact that the position of the sound source is inaccurate is solved. According to the method, a single motion sound source is utilized; broadband signal, azimuth information of the test ship is obtained by utilizing real-time position coordinates of the test ship and real-time position coordinates of the underwater acoustic array, so that the real phase difference between the underwater array channels is obtained as reference, the phase difference deviation value between the channels is obtained, and signals received by the detection channels are calibrated. The method is mainly used for calibrating the phase between the underwater acoustic array channels.

Description

technical field [0001] The patent of the invention relates to an external field calibration method for phase consistency between channels of an underwater acoustic array, which belongs to the field of parameter estimation. Background technique [0002] The quaternary cross array has the ability of direction finding, and the quaternary cross array is a specific form of underwater array, but when there is a phase difference between the channels of the underwater array, it will lead to the deterioration of the azimuth estimation result. Therefore, it is necessary to Calibrate the phase difference between the array channels. Generally speaking, if the relative position of the sound source and the cross-quad array is known, the orientation of the sound source relative to the cross-quad array can be obtained. [0003] However, it is difficult to calibrate the phase difference between the array channels in the free field condition in the pool, especially in the low frequency condi...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of poor phase calibration accuracy between array channels due to inaccurate sound source positions during phase calibration between underwater array channels under external field conditions. The present invention provides an underwater acoustic sensor based on moving sound sources Calibration Method of Phase Consistency Between Array Channels

Images