Dynamic Characteristics of Flexural Ultrasonic Transducers

Feeney, A. , Kang, L., Rowlands, G. and Dixon, S. (2017) Dynamic Characteristics of Flexural Ultrasonic Transducers. In: 2017 International Congress on Ultrasonics, Honolulu, HI, USA, 18-20 Dec 2017, 045002. (doi:10.1121/2.0000684)

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Abstract

The flexural ultrasonic transducer is a robust and inexpensive device which can be used as either a transmitter or receiver of ultrasound, commonly used as proximity sensors or in industrial metrology systems. Their simple construction comprises a piezoelectric disc bonded to a metal cap, which is a membrane that can be considered as a constrained plate. Flexural transducers tend to be driven with a short voltage burst of several cycles at a nominal resonant frequency, in one of two vibration modes. The physics of their vibration response has not been thoroughly reported, and yet an understanding of their operation is essential to optimise application. The vibration behaviour of a flexural transducer can be discretised into three principal zones, comprising a build-up to steady-state, steady-state, and a natural decay, or ring-down. This discretisation can be used to develop mathematical interpretations of the flexural transducer response. Through a combination of experimental methods including laser Doppler vibrometry, and the development of a mechanical analog model, the response mechanisms of flexural transducers are investigated.

Item Type:Conference Proceedings
Additional Information:This research is funded by EPSRC grant EP/N025393/1.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Feeney, Dr Andrew
Authors: Feeney, A., Kang, L., Rowlands, G., and Dixon, S.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
ISSN:1939-800X
Published Online:08 March 2018
Copyright Holders:Copyright © 2018 Acoustical Society of America
First Published:First published in Proceedings of Meetings on Acoustics 32(1): 045002
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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