水听器
声学
指向性
微电子机械系统
振动
灵敏度(控制系统)
全向天线
话筒
加速度计
声压
材料科学
工程类
计算机科学
物理
电子工程
电气工程
天线(收音机)
操作系统
光电子学
作者
Shufeng Wu,Qinyu Qiao,Guochang Liu,Haoyu Tan,Guojun Zhang,Wendong Zhang,Renxin Wang
出处
期刊:Measurement
[Elsevier]
日期:2023-01-11
卷期号:208: 112463-112463
被引量:9
标识
DOI:10.1016/j.measurement.2023.112463
摘要
This paper proposes a MEMS co-vibration combined hydrophone (CCH) to position the weak acoustic source of small-volume UUV acoustic self-guided cabins. With an external diameter of 36 mm, it adopts the MEMS triaxial accelerometer to form the vector channel and the MEMS capacitive omnidirectional microphone to form the scalar channel. This paper first analyzes the acoustic receiving model of an elastic-free sphere in water, designs a MEMS co-vibration combined hydrophone packaging and then simulates its acoustic performance. The average density of the encapsulated CCH is 1.01 g/cm3. The vector channel bandwidth is 20 Hz−1,000 Hz, and the sensitivity is −173 dB @ 1 kHz (re 1 V/ μPa) with good cosine directivity. The scalar channel sensitivity is −171 dB @ 1 kHz (re 1 V/ μPa) with omnidirectional directivity. The error of the orientation test in the standing wave tube is less than 1 degree. The sound source-level test results are mostly consistent with the theoretical calculation based on the actual distance. The above results indicate that the hydrophone can be mounted to UUV to perform sound source detection, which can meet the need for precise positioning, and has a specific application value.
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