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The electro-mechanical behaviour of flexural ultrasonic transducers
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Dixon, Steve M., Kang, Lei, Ginestier, Michael, Wells, Christopher, Rowlands, G. (George) and Feeney, Andrew (2017) The electro-mechanical behaviour of flexural ultrasonic transducers. Applied Physics Letters, 110 (22). 223502. doi:10.1063/1.4984239
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Official URL: http://dx.doi.org/10.1063/1.4984239
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: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||
| Divisions: | Faculty of Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Ultrasonic transducers, Piezoelectric devices, Ultrasonic testing, Ultrasonic waves | ||||||
| Journal or Publication Title: | Applied Physics Letters | ||||||
| Publisher: | American Institute of Physics | ||||||
| ISSN: | 0003-6951 | ||||||
| Official Date: | 30 May 2017 | ||||||
| Dates: |
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| Volume: | 110 | ||||||
| Number: | 22 | ||||||
| Article Number: | 223502 | ||||||
| DOI: | 10.1063/1.4984239 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||
| Grant number: | EP/N025393/1 |
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