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Oil filled flexural ultrasonic transducers for resilience in environments of elevated pressure
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Somerset, William E., Feeney, Andrew, Kang, Lei, Li, Zhichao and Dixon, Steve M. (2021) Oil filled flexural ultrasonic transducers for resilience in environments of elevated pressure. In: 2021 IEEE International Ultrasonics Symposium (IUS), Xi'an, China, 11-16 Sep 2021. Published in: 2021 IEEE International Ultrasonics Symposium (IUS) pp. 1-4. ISBN 9781665403559. ISSN 1948-5719. doi:10.1109/IUS52206.2021.9593697
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WRAP-oil-filled-flexural-ultrasonic-transducers-resilience-environments-elevated-pressure-2021.pdf - Accepted Version - Requires a PDF viewer. Download (1128Kb) | Preview |
Official URL: http://dx.doi.org/10.1109/IUS52206.2021.9593697
Abstract
In recent years, flexural ultrasonic transducers (FUTs) have gained popularity in a wider scope of applications, due to their robust design and efficient coupling to different fluids. They comprise a metallic membrane with a piezoelectric ceramic bonded to its underside, typically protected with a silicone backing to seal the FUT from its environment. However, the sealed interior of the commercially available and widely used FUT has restricted its application in environments above 1 bar, where pressure imbalances are known to lead to unstable dynamic performance, and deformation of the piezoelectric-membrane structure and the housing of the transducer. The recently reported approach of venting, such as the removal of the hermetic seal, has been shown to boost the resilience of FUTs to environments of elevated pressure, but an alternative approach is needed to prevent exposure of sensitive internal structures within the transducer to an external fluid. In this study, a novel FUT design for ultrasound measurement in elevated pressure environments is proposed, where the vibrating membrane is backed with an incompressible fluid comprising a non-volatile oil. Prototype oil-filled flexural ultrasonic transducers (OFFUTs) are fabricated, and their dynamic performance monitored through acoustic microphone, electrical impedance, and pitch-catch ultrasound measurements. Enhanced resilience of the OFFUT to environmental pressures approaching 200 bar is displayed, expanding the potential applications of this device towards challenging flow and gas monitoring systems.
| Item Type: | Conference Item (Paper) | ||||||
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| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Ultrasonic transducers, Flow meters -- Design and construction, Piezoelectric ceramics, Pressure | ||||||
| Journal or Publication Title: | 2021 IEEE International Ultrasonics Symposium (IUS) | ||||||
| Publisher: | IEEE | ||||||
| ISBN: | 9781665403559 | ||||||
| ISSN: | 1948-5719 | ||||||
| Book Title: | 2021 IEEE International Ultrasonics Symposium (IUS) | ||||||
| Official Date: | 13 November 2021 | ||||||
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| Page Range: | pp. 1-4 | ||||||
| DOI: | 10.1109/IUS52206.2021.9593697 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Reuse Statement (publisher, data, author rights): | © 2021 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 | ||||||
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| Conference Paper Type: | Paper | ||||||
| Title of Event: | 2021 IEEE International Ultrasonics Symposium (IUS) | ||||||
| Type of Event: | Conference | ||||||
| Location of Event: | Xi'an, China | ||||||
| Date(s) of Event: | 11-16 Sep 2021 | ||||||
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