100kHz～500kHz压电复合材料标准水听器

Piezoelectric composite standard reference hydrophone for the frequency rang 100～500kHz

本文介绍了一种我们制作的可应用于100kHz～500kHz频段的标准水听器,水听器敏感元件采用1-3型压电复合材料,通过对敏感元件及水听器结构进行合理设计,从工艺上保证水听器性能的稳定、可靠,制作完成的标准水听器满足高频标准的所有技术指标要求。测试结果表明,水听器的接收灵敏度大于-194dB,频段内灵敏度起伏为2.9dB,最高使用频率-3dB波束宽度大于20度;稳定性考核表明,水听器有良好的温度、时间稳定性,是一种比较理想的中高频标准水听器,适合于水声的校准和中高频声信号测试。

This paper describes a new standard reference hydrophone we fabricate for use in the frequency range 100-500kHz. For the sensor material is use the 1-3 piezoelectric composite. Experimental result show that the hydrophone receiving sensitivity of-194dB is high and has a flat frequency response in the range 100-500kHz, temperature and time test shows receiving sensitivity is stable with temperature and time change. It is a ideal hydrophone applied in middle frequency acoustic measurement.