Pressure-resistant hydrophone based on piezoelectric ceramic spherical shell
WANG Wenlong;DA Lianglong;YIN Hang;Navy Submarine Academy;National Laboratory for Marine Science and Technology;
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 36 mm, and its working frequency range is from 50 Hz to 10 kHz. The low frequency pressure sensitivity is-198.4 dB(0 dB ref 1 V/μPa), the noise spectrum level is 46.5 dB at 1 kHz,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.
【CateGory Index】： TB565.1