某型拖曳接收换能器的改进研究

Improvement and Research of Certain Type Towed Receiving Hydrophone

为提高拖曳接收换能器的灵敏度,对该换能器的性能进行改进研究。对拖曳接收换能器的电声性能进行有限元仿真,将原拖曳接收换能器内有机玻璃盖板替换为铜质盖板及在压电陶瓷圆管内增加软木橡胶背衬,并对改进前后的性能进行对比分析。结果表明,改进后的拖曳接收换能器的灵敏度起伏在4 d B以内,且指向性特性没有明显变化。通过改进设计后,能大幅减小换能器的灵敏度起伏,可简化后级处理电路,同时提高系统的动态范围。

For improving sensitivity of towed receiving hydrophone, carry out improvement and research of hydrophone performance. The electroacoustic performance of towed receiving hydrophone is simulated by finite element, replace the plexiglass cover plate with the copper plate and adding cork rubber liners in piezoelectric ceramics circular tube. Then compare and analyze the performances before and after improvement. The result shows that the undulation of sensitivity can be improved less than 4 dB, while the directivity of the receiving hydrophone change less. By improving the design, it can greatly reduce the sensitivity fluctuation receiving hydrophone, which can simplify the post stage circuit, and improve the dynamic range of the system.