Rsearch On The Method Of Pressure Compensation And Towed Body Design For Underwater Acoustic Transducer

With the development of underwater acoustic technology, acoustic transducer, which is an important conponent of sonar, are more and more widely applied in marine activities. Whereas, the increasing of working depth calls for a stricter demand on the balance between internal and external pressure of the transducer. The transducer at which the underwater pressure compensation system aims works in the depth of 0 to 100 meters. This paper mainly studied the gas pressure compensation system for transducer, and designed a compensation system that can provide a high control precision and work for a long time underwater.In this paper , the research status and development trend of underwater gas pressure compensation system were discussed as well as the purpose and meaning of doing such kind of research. On the base of comparing the advantages and disadvantages of three kinds of underwater gas pressure compensation methods, the method used in this paper was determined. This paper also presented a detailed description of the implementation of hardware and software for the underwater gas pressure compensation system, including the choosing principle of pressure sensor, proportional pressure valve and controller, the designing of main circuit and electrical control, data collection and analysis as well as the programming of PLC control software, etc. To overcome the effect of the drag boat on the transducer and keep the two cylindrical surfaces of transducer facing the water, a self-controlled drag body was designed and studied of its mathematical properties. Finally, corresponding experiment and simulation was accomplished and the analysis of the results provided convenience for further study.