基于1-1-3型压电复合材料水声换能器性能分析

Study on Underwater Performance of Underwater Transducer Manufactured by 1-1-3 Piezoelectric Composite

为提高高频水声换能器的性能,提出了一种基于1-1-3型压电复合材料的带有梯形匹配层的水声换能器设计。应用有限元方法分析了有无匹配层对复合材料电性能、辐射端振动位移的影响。并研制了带匹配层和不带匹配层的2种水声换能器。测试结果显示引入匹配层使得水声换能器在谐振频率为360 kHz时最大发送电压响应达到169.4 dB,接收电压灵敏度为-190 dB,-3 dB下接收信号带宽最大可达70 kHz,最大声源级达到208 dB。发送电压响应比没有匹配层的换能器提高了3.8 dB、声源级提高了6 dB、接收带宽拓宽了1.45倍。

A novel kind of underwater transducer with trapezoidal matching layer manufactured by 1-1-3 piezoelectric composite has been proposed to improve the underwater performance of high frequency transducer. In this paper, the finite element method has been used to analyze the influence of the matching layer on the electrical properties of the composite materials and vibration displacement of the radiation area. Two kinds of underwater transducers with and without matching layers have been fabricated. The experimental results show that the transmission voltage response of the underwater transducer with matching layer reaches 169.4 dB at 360 kHz, and the receiving voltage sensitivity reaches-190 dB, the bandwidth is up to 70 kHz and the maximum sound source level is 208 dB. Comparing with transducer without matching layer, the transmission voltage response is increased by 3.8 dB. Meanwhile the sound source level is increased by 6 dB. The received bandwidth is increased by 1.45 times.