Method for calibrating phase consistency between channels of underwater detection array

Abstract

The invention discloses a method for calibrating phase consistency between channels of an underwater detection array, and belongs to the technical field of acoustic testing of underwater detection arrays. The method solves the problems that when deviation exists in the phase consistency between the channels of an existing underwater detection array, the accuracy of an orientation estimation resultis poor, and the efficiency of calibrating the phase consistency between the channels of the multiple underwater arrays one by one is low. In a set underwater testing environment, the positions of sound sources are estimated through the GPS positions of the multiple detection arrays, and then phase consistency calibration error data between the detection channels at different frequency points ofthe detection arrays are solved through the positions of the sound sources; then the phase consistency between the channels of the multiple underwater detection arrays is calibrated through the phaseconsistency calibration error data. The method is suitable for calibrating the phase consistency between the channels of the multiple arrays at the same time.

Description

technical field [0001] The invention belongs to the technical field of acoustic testing of underwater detection arrays, and in particular relates to a method for calibrating phase consistency between channels of underwater detection arrays. Background technique [0002] When there is an error in the phase consistency between each channel of the underwater detection array with direction-finding capability, it will lead to poor azimuth estimation results. Therefore, the phase consistency between the array channels needs to be calibrated before the detection array is used. . [0003] However, when the phase consistency calibration between the channels of the existing detection array is low in the calibration sound source signal frequency, due to the large volume of the low-frequency sound source, it is difficult to use a water pool for calibration to meet the conditions of the free field, and the calibration accuracy is low; if the external field environment is used For calibr...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the accuracy of the azimuth estimation results is poor when there is a deviation in the channel-to-channel phase consistency of the existing underwater detection array, and the problem of low efficiency in the consistency calibration between channels one by one for multiple underwater arrays

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