Method for calibrating phase consistency between channels of underwater detection array

An underwater detection and calibration method technology, applied in measurement devices, water resources assessment, climate sustainability, etc., can solve the problems of low consistency calibration efficiency and poor accuracy of azimuth estimation results, so as to improve the accuracy of azimuth estimation and detection. ability, avoid the effect of poor positioning accuracy

Active Publication Date: 2020-01-17
HARBIN ENG UNIV
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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 ph

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  • Method for calibrating phase consistency between channels of underwater detection array
  • Method for calibrating phase consistency between channels of underwater detection array
  • Method for calibrating phase consistency between channels of underwater detection array

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Example Embodiment

[0030] Specific embodiment one: the following combination figure 1 This embodiment will be described. A method for calibrating phase consistency between channels of an underwater detection base array described in this embodiment is specifically as follows:

[0031] In the set underwater test environment, use the GPS positions of multiple detection arrays to estimate the position of the sound source, and then use the position of the sound source to obtain the phase consistency between the detection channels at different frequencies of each detection array Sexual calibration error data;

[0032] Then, using the phase consistency calibration error data, the phase consistency calibration between multiple underwater detection array channels is realized.

[0033] The method for obtaining the phase consistency calibration error data between the detection channels at different frequency points of the detection matrix is ​​as follows:

[0034] Step 1. In the set underwater test envir...

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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...

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Application Information

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IPC IPC(8): G01S15/06G01S7/52
CPCG01S15/06G01S7/52004Y02A90/30
Inventor 孙大军兰华林滕婷婷师俊杰梅继丹吕云飞靳建嘉
Owner HARBIN ENG UNIV
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