Dynamic nonlinearity in piezoelectric flexural ultrasonic transducers

Feeney, A. , Kang, L. and Dixon, S. (2019) Dynamic nonlinearity in piezoelectric flexural ultrasonic transducers. IEEE Sensors Journal, 19(15), pp. 6056-6066. (doi: 10.1109/JSEN.2019.2911158)

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Recent studies of the electro-mechanical behavior of flexural ultrasonic transducers have shown that their response can be considered as three distinct characteristic regions, the first building towards a steady state, followed by oscillation at the driving frequency in the steady state, before an exponential decay from the steady state at the transducer's dominant resonance frequency, once the driving force is removed. Despite the widespread industrial use of these transducers as ultrasonic proximity sensors, there is little published information on their vibration characteristics under different operating conditions. Flexual transducers are composed of a piezoelectric ceramic disc bonded to the inner surface of a metallic cap, the membrane of which bends in response to the high-frequency ceramic vibrations of the ceramic. Piezoelectric devices can be subject to nonlinear behavior, but there is no reported detail of the nonlinearity in flexural transducers. Experimental investigation through laser Doppler vibrometry shows strong nonlinearity in the vibration response, where resonance frequency reduces with increasing vibration amplitude.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Feeney, Dr Andrew
Authors: Feeney, A., Kang, L., and Dixon, S.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:IEEE Sensors Journal
ISSN (Online):1558-1748
Published Online:25 April 2019
Copyright Holders:Copyright © 2019 The Authors
First Published:First published in IEEE Sensors Journal 19(15):6056-6066
Publisher Policy:Reproduced under a Creative Commons Licence

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