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A study on MEMS vector hydrophone and its orientation algorithm

Zhenzhen Shang (North University of China, Taiyuan, China)
Wendong Zhang (Key Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, Taiyuan, China)
Guojun Zhang (North University of China, Taiyuan, China)
Xiaoyong Zhang (North University of China, Taiyuan, China)
Lansheng Zhang (North University of China, Taiyuan, China)
Renxin Wang (North University of China, Taiyuan, China)

Sensor Review

ISSN: 0260-2288

Article publication date: 31 March 2020

Issue publication date: 26 May 2020

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Abstract

Purpose

The problem of port and starboard ambiguity will exist when only utilize the vector or scalar parameters. Meanwhile, the amplitude-phase error between the vector and scalar can also cause this problem. In this paper, a compound MEMS vector hydrophone which contains cilia vector microstructure and piezoelectric ceramic tube has been presented to solve the problem. Compared with traditional MEMS vector hydrophone, the compound MEMS vector hydrophone can realize the measurement of sound pressure and vibration velocity simultaneously.

Design/methodology/approach

A compound MEMS vector hydrophone has been presented. The unipolar directivity of the combined signal which combine the acoustic pressure and vibration velocity is used to achieve the direction of arrival (DOA). This paper introduced the working principle and the target detection mechanism of the compound vector hydrophone. The amplitude and phase error are analyzed and corrected in the standing wave tube. After that, the authors use beam-forming algorithm to estimate the DOA.

Findings

The experimental results in the standing wave tube and the external field verified the vector hydrophone's directional accuracy up to 1 and 5 degrees, respectively.

Practical implications

The research of compound vector hydrophone plays an important role in marine acoustic exploration and engineering applications.

Originality/value

This research provides a basis for MEMS hydrophone directivity theory. The compound vector hydrophone has been applied in the underwater location, with a huge market potential in underwater detection systems.

Keywords

Acknowledgements

Conflict of interest Form: The authors declared that they have no conflicts of interest to this work. We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted. The manuscript entitled, “A study on MEMS vector hydrophone and its orientation algorithm.”

Citation

Shang, Z., Zhang, W., Zhang, G., Zhang, X., Zhang, L. and Wang, R. (2020), "A study on MEMS vector hydrophone and its orientation algorithm", Sensor Review, Vol. 40 No. 2, pp. 191-201. https://doi.org/10.1108/SR-05-2019-0120

Publisher

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Emerald Publishing Limited

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