The electro-mechanical behaviour of flexural ultrasonic transducers

Dixon, S., Kang, L., Ginestier, M., Wells, C., Rowlands, G. and Feeney, A. (2017) The electro-mechanical behaviour of flexural ultrasonic transducers. Applied Physics Letters, 110(22), 223502. (doi: 10.1063/1.4984239)

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Abstract

Flexural ultrasonic transducers are capable of high electro-mechanical coupling efficiencies for the generation or detection of ultrasound in fluids. They are the most common type of ultrasonic sensor, commonly used in parking sensors, because the devices are efficient, robust, and inexpensive. The simplest design consists of a piezoelectric disc, bonded to the inner surface of a metal cap, the face of which provides a vibrating membrane for the generation or detection of ultrasonic waves in fluids. Experimental measurements demonstrate that during the excitation of the piezoelectric element by an electrical voltage, there are three characteristic regions, where the frequency of the emitted ultrasonic wave changes during the excitation, steady-state, and the final decay process. A simple mechanical analogue model is capable of describing this behaviour.

Item Type:Articles
Additional Information:This research was funded by EPSRC Grant No. EP/N025393/1.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Feeney, Dr Andrew
Authors: Dixon, S., Kang, L., Ginestier, M., Wells, C., Rowlands, G., and Feeney, A.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Applied Physics Letters
Publisher:AIP Publishing
ISSN:0003-6951
ISSN (Online):1077-3118
Published Online:30 May 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Applied Physics Letters 110(22): 223502
Publisher Policy:Reproduced under a Creative Commons License

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