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Venting in the comparative study of flexural ultrasonic transducers to improve resilience at elevated environmental pressure levels
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Feeney, Andrew, Kang, Lei, Somerset, William and Dixon, Steve M. (2020) Venting in the comparative study of flexural ultrasonic transducers to improve resilience at elevated environmental pressure levels. IEEE Sensors Journal . p. 1. doi:10.1109/JSEN.2020.2974547 (In Press)
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Official URL: http://dx.doi.org/10.1109/JSEN.2020.2974547
Abstract
The classical form of a flexural ultrasonic transducer is a piezoelectric ceramic disc bonded to a circular metallic membrane. This ceramic induces vibration modes of the membrane for the generation and detection of ultrasound. The transducer has been popular for proximity sensing and metrology, particularly for industrial applications at ambient pressures around 1 bar. The classical flexural ultrasonic transducer is not designed for operation at elevated pressures, such as those associated with natural gas transportation or petrochemical processes. It is reliant on a rear seal which forms an internal air cavity, making the transducer susceptible to deformation through pressure imbalance. The application potential of the classical transducer is therefore severely limited. In this study, a venting strategy which balances the pressure between the internal transducer structure and the external environment is studied through experimental methods including electrical impedance analysis and pitch-catch ultrasound measurement. The vented transducer is compared with a commercial equivalent in air towards 90 bar. Venting is shown to be viable for a new generation of low cost and robust industrial ultrasonic transducers, suitable for operation at high environmental pressure levels.
| Item Type: | Journal Article | ||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||
| Divisions: | Faculty of Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Ultrasonic transducers, Pressure -- Measurement | ||||||
| Journal or Publication Title: | IEEE Sensors Journal | ||||||
| Publisher: | Institute of Electrical and Electronic Engineers | ||||||
| ISSN: | 1530-437X | ||||||
| Official Date: | 21 February 2020 | ||||||
| Dates: |
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| Date of first compliant deposit: | 9 March 2020 | ||||||
| Page Range: | p. 1 | ||||||
| DOI: | 10.1109/JSEN.2020.2974547 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | In Press | ||||||
| Publisher Statement: | © 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: | Restricted or Subscription Access | ||||||
| RIOXX Funder/Project Grant: |
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