Kang, Lei, Feeney, Andrew and Dixon, Steve M. (2020) The high frequency flexural ultrasonic transducer for transmitting and receiving ultrasound in air. IEEE Sensors Journal, 20 (14). pp. 7653-7660. doi:10.1109/JSEN.2020.2981667 ISSN 1530-437X.

Preview	PDF WRAP-high-frequency-flexural-ultrasonic-transducer-ultrasound-air-Dixon-2020.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1613Kb) | Preview
	PDF WRAP-high-frequency-flexural-ultrasonic-transducer-ultrasound-air-Dixon-2020.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only - Requires a PDF viewer. Download (1382Kb)

Request Changes to record.

Abstract

Flexural ultrasonic transducers are robust and low cost sensors that are typically used in industry for distance ranging, proximity sensing and flow measurement. The operating frequencies of currently available commercial flexural ultrasonic transducers are usually below 50 kHz. Higher operating frequencies would be particularly beneficial for measurement accuracy and detection sensitivity. In this paper, design principles of High Frequency Flexural Ultrasonic Transducers (HiFFUTs), guided by the classical plate theory and finite element analysis, are reported. The results show that the diameter of the piezoelectric disc element attached to the flexing plate of the HiFFUT has a significant influence on the transducer's resonant frequency, and that an optimal diameter for a HiFFUT transmitter alone is different from that for a pitch-catch ultrasonic system consisting of both a HiFFUT transmitter and a receiver. By adopting an optimal piezoelectric diameter, the HiFFUT pitch-catch system can produce an ultrasonic signal amplitude greater than that of a non-optimised system by an order of magnitude. The performance of a prototype HiFFUT is characterised through electrical impedance analysis, laser Doppler vibrometry, and pressure-field microphone measurement, before the performance of two new HiFFUTs in a pitch-catch configuration is compared with that of commercial transducers. The prototype HiFFUT can operate efficiently at a frequency of 102.1 kHz as either a transmitter or a receiver, with comparable output amplitude, wider bandwidth, and higher directivity than commercially available transducers of similar construction.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Ultrasonic transducers, Finite element method , Acoustic emission testing
Journal or Publication Title:	IEEE Sensors Journal
Publisher:	Institute of Electrical and Electronic Engineers
ISSN:	1530-437X
Official Date:	20 March 2020
Dates:	Date Event 20 March 2020 Published 15 July 2020 Available 12 March 2020 Accepted
Volume:	20
Number:	14
Page Range:	pp. 7653-7660
DOI:	10.1109/JSEN.2020.2981667
Status:	Peer Reviewed
Publication Status:	Published
Reuse Statement (publisher, data, author rights):	© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Access rights to Published version:	Open Access (Creative Commons)
Date of first compliant deposit:	19 March 2020
Date of first compliant Open Access:	23 March 2020
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID EP/N025393/1 [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266
Related URLs:	Publisher

Request changes or add full text files to a record

Repository staff actions (login required)

View Item

Downloads