Piezoelectrics & Acoustooptics, Volume. 44, Issue 3, 373(2022)
Research on Vector Hydrophone for Underwater Acoustic Communication
The vibration velocity information of water quality point cannot be obtained by the traditional sound pressure hydrophone to receive the signal in underwater acoustic communication system. In this paper, a vector hydrophone with a diameter of 38 mm and a height of 46 mm with the same vibration mode is developed, which can synchronously and co-located obtain the information of sound pressure and vibration velocity of water quality points, thus solving the problem of incomplete acquisition of 8~13 kHz signals by underwater acoustic communication system. The vector hydrophone adopts a specially designed integrated three-dimensional acceleration sensor with common inertial mass block, and the sensitivity of three axial directions in space reaches more than 328.0 pC/g. The PZT-5 piezoelectric ceramic ring is used as the sound pressure channel of vector hydrophone, the vector hydrophone prototype with x, y, z channel and p channel is developed and tested in the tank. The test results show that the sound pressure sensitivity level of x, y, z channel at 10 kHz is above -172 dB (0 dB reference value of 1 V/μPa), and it has good cosine directivity. The sensitivity level of sound pressure channel can reach -198 dB, which can be used for acquisition of 8~13 kHz signals in underwater acoustic communication.
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WANG Zherui, WANG Yan. Research on Vector Hydrophone for Underwater Acoustic Communication[J]. Piezoelectrics & Acoustooptics, 2022, 44(3): 373
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Received: Apr. 26, 2022
Accepted: --
Published Online: Jul. 24, 2022
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