Transducer real ship calibration system and calibration method based on ultra-short baseline positioning

Abstract

The invention discloses a transducer real ship calibration system based on ultra-short baseline positioning and a calibration method thereof. According to the invention, a transducer to be tested, a positioning transducer and a transmitting end electronic bin are fixed mutually and then are flexibly hung underwater through being connected with a mother ship, and a three-dimensional array and a receiving end electronic bin are flexibly hung underwater through being connected with a son ship. The mother ship is parked in the center of a lake, the son ship moves around the mother ship for multiple circles at a constant speed and a constant distance, and then the measurement process is repeated to meet the directivity 360-degree measurement requirement of the transducer to be measured; and the work station processes and calculates all the received measurement data, so that the relative position of the transducer to be measured and the three-dimensional array and the performance parameters calibrated by the transducer at the position can be obtained. According to the invention, real ship performance calibration can be realized without dismounting the transducer, and performance calibration of the low-frequency transducer can also be realized in the ocean, so that the calibration frequency range and the calibration precision are greatly improved.

Description

technical field [0001] The invention relates to low-frequency transducer calibration technology, in particular to a transducer real-ship calibration system based on ultra-short baseline positioning and a calibration method thereof. Background technique [0002] In recent years, as people pay more attention to marine resources, various countries continue to increase investment in ocean development, and hydroacoustic technology is developing day by day. Driven by the needs of marine scientific research, marine resource development, and underwater acoustic countermeasure technology, the research focus of underwater acoustic transducers is on low-frequency broadband, high-power, and deep-water work. Directivity can reflect the characteristics of the transducer’s emission response or sensitivity that changes with the direction of the emitted or incident sound wave. It is a must-test parameter for the transducer. The directivity diagram is an important characteristic parameter tha...

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

Images