基于球形压电陶瓷的耐压水听器

利用球形压电陶瓷自身所具有的耐压能力,采用径向极化空气背衬压电球壳换能器作为声学接收敏感元件,设计并制作了一种球形耐压水听器。首先对其低频开路接收灵敏度和谐振频率等声学特性进行了分析和有限元仿真,然后对其强度和稳定性等耐压性能进行了分析和有限元仿真,最后对其声学性能和耐压能力进行了测试。测试表明,该球形耐压水听器的直径为36 mm,工作频段为50 Hz～10 kHz,低频接收灵敏度为-198.4 dB (0 dB=1 V/μPa),等效自噪声谱级为46.5 dB@1 kHz,其耐压深度可达3000 m。该耐压水听器为大深度水听器设计提供了参考,在深水声学领域具有重要的应用价值。

Pressure-resistant hydrophone based on piezoelectric Ceramic spherical Shell

Based on the pressure resistance of piezoelectric ceramic spherical shell itself, a pressure-resistant hydrophone was designed and fabricated by using radially poled air backing piezoelectric ceramic spherical shell transducer as acoustic sensitive element. Firstly, the acoustic characteristics such as low frequency open circuit receiving sensitivity and vibration frequency were analyzed, and simulated by finite element method. Then the pressure-resistant performance such as strength and stability were analyzed, also simulated with FE software. Finally, its acoustic performance and pressure resistance were tested. Test results show that the diameter of the pressure-resistant hydrophone is 36mm, and its working frequency range is from 50Hz to 10kHz. The low frequency pressure sensitivity is -198.4dB (0dB ref 1V/uPa); the noise spectrum level is 46.5dB at 1kHz, and its working depth is 3000 m. This pressure-resistant hydrophone provides a reference for the design of deep water hydrophones and has important application value in the field of deep water acoustics.