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

A technology of underwater acoustics and calibration methods, applied in the field of parameter estimation, can solve the problem of poor phase calibration accuracy between array channels, and achieve the effect of improving azimuth estimation accuracy and detection capability

Active Publication Date: 2020-01-17
HARBIN ENG UNIV
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[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 ar

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

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[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0036] It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0037] The present invention will be further described below with reference to the drawings and specific embodiments, but it is not a limitation of the present invention.

[0038] See figure 1 with figure 2 In this embodiment, the method for calibration of phase consistency be...

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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...

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Application Information

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IPC IPC(8): G01S15/06G01S7/52
CPCG01S7/52004G01S15/06Y02A90/30
Inventor 兰华林张思琪靳建嘉吕云飞梅继丹滕婷婷
Owner HARBIN ENG UNIV
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