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Sensors 2016, 16(3), 312; doi:10.3390/s16030312

Underwater Imaging Using a 1 × 16 CMUT Linear Array

1
Key Laboratory of Instrumentation Science & Dynamic Measurement, North University of China, Ministry of Education, Taiyuan 030051, China
2
Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China
3
School of Computer Science, North China University of Technology, Beijing 100144, China
*
Author to whom correspondence should be addressed.
Academic Editor: Gonzalo Pajares Martinsanz
Received: 25 January 2016 / Revised: 20 February 2016 / Accepted: 25 February 2016 / Published: 1 March 2016
(This article belongs to the Special Issue Imaging: Sensors and Technologies)
View Full-Text   |   Download PDF [4399 KB, uploaded 1 March 2016]   |  

Abstract

A 1 × 16 capacitive micro-machined ultrasonic transducer linear array was designed, fabricated, and tested for underwater imaging in the low frequency range. The linear array was fabricated using Si-SOI bonding techniques. Underwater transmission performance was tested in a water tank, and the array has a resonant frequency of 700 kHz, with pressure amplitude 182 dB (μPa·m/V) at 1 m. The −3 dB main beam width of the designed dense linear array is approximately 5 degrees. Synthetic aperture focusing technique was applied to improve the resolution of reconstructed images, with promising results. Thus, the proposed array was shown to be suitable for underwater imaging applications. View Full-Text
Keywords: capacitive micro-machined ultrasonic transducer linear array; transmission performance; synthetic aperture focusing technique; underwater imaging capacitive micro-machined ultrasonic transducer linear array; transmission performance; synthetic aperture focusing technique; underwater imaging
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, R.; Zhang, W.; He, C.; Zhang, Y.; Song, J.; Xue, C. Underwater Imaging Using a 1 × 16 CMUT Linear Array. Sensors 2016, 16, 312.

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