Design of high-sensitivity low-frequency vibration velocity gradient hydrophone

被引：0
|
作者：
Ma X. [1 ,2 ,3 ,4 ]
Zhang W. [4 ]
Hong L. [1 ,2 ,3 ]
机构：
[1] National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin
[2] Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin
[3] College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin
[4] Yichang Testing Technique Research Institute, Yichang
来源：
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | 2024年 / 32卷 / 04期
关键词：
electrochemistry sensor; hydrophone; sensitivity; vibration velocity gradient;
D O I：
10.13695/j.cnki.12-1222/o3.2024.04.011
中图分类号：
学科分类号：
摘要：
The vibration velocity gradient hydrophone has the disadvantages of low sensitivity and narrow frequency band, which limits its application in engineering. In order to solve those problems, based on the principle of electrochemical energy exchange, an electrochemical energy exchange sensor is designed by using electrode micromachining technology, and a vibration velocity gradient hydrophone with higher sensitivity and lower frequency is fabricated. The designed electrochemical sensor has a vibration sensitivity of 2500 V/(m/s), which is 19 dB higher than that of the moving coil sensor. The operating frequency band is extended from 20 Hz~200 Hz to 5 Hz~400 Hz, indicating that it has higher sensitivity and wider operating frequency band. The vibration velocity gradient hydrophone is calibrated within the frequency range of 100 Hz to 400 Hz. The results demonstrate that both the sensitivity of the pure partial derivative channel in the x and y directions, as well as the sensitivity of the mixed partial derivative channel, adhere to a growth rate of 6 dB per frequency range while exhibiting dipole directivity and quadrupole directivity respectively. The measured values of sensitivity and directivity of pure and mixed partial derivative channels are in agreement with the theoretical values. © 2024 Editorial Department of Journal of Chinese Inertial Technology. All rights reserved.
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页码：399 / 405
页数：6
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