A real ship calibration system and calibration method for transducers based on ultra-short baseline positioning

Abstract

The invention discloses a transducer real ship calibration system and a calibration method based on ultra-short baseline positioning. In the present invention, the transducer to be tested, the positioning transducer, and the electronic warehouse at the transmitting end are fixed to each other and then flexibly hoisted underwater by connecting with the mother ship, and the three-dimensional array and the electronic warehouse at the receiving end are flexibly hoisted underwater by connecting with the sub-ship. underwater. The mother ship is parked in the middle of the lake, and the sub-ship moves around the mother ship at a constant speed and a constant distance for multiple circles, and then repeats the above measurement process to meet the 360° measurement requirements for the directivity of the transducer to be tested; the workstation processes all the received measurement data, The relative position of the transducer to be tested and the three-dimensional array and the performance parameters calibrated by the transducer at this position can be obtained. The invention can not only realize the performance calibration of the real ship without dismantling the transducer, but also realize the performance calibration of the low-frequency transducer in the ocean, and greatly improve the calibration frequency range and calibration accuracy.

Description

A transducer real ship calibration system and calibration method based on ultra-short baseline positioning technical field The present invention relates to low frequency transducer calibration technology, particularly a kind of transducer real ship based on ultra-short baseline positioning Calibration system and method of calibration. Background technique In recent years, with the improvement of people's attention to marine resources, various countries continue to increase the development of the ocean [0002] Investment, underwater acoustic technology is developing day by day. Driven by the needs of marine scientific research, marine resource development, underwater acoustic countermeasure technology and other fields The research focus of underwater acoustic transducers focuses on low-frequency broadband, high-power, and deep-water work. Directivity can reflect The characteristic that the transmission response or sensitivity of the transducer changes with the direct...

AI Technical Summary

Problems solved by technology

When measuring the directivity of the transducer in the anechoic pool, it is difficult to measure the directivity of the low-frequency transducer due to the limitation of the size of the anechoic pool and the sound absorption coefficient of the anechoic material; During directivity measurement, the rigid lifting and attitude control of the transducer to be tested and the standard hydrophone cannot be realized; if the near-field measurement method is used, the near-field measurement matrix is ​​required, and the size of the matrix is ​​large, requiring special hoisting equipment Auxiliary control is expensive, the efficiency is not high, the maintenance workload is large, and it cannot be widely used

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