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Design and dynamics of oil filled flexural ultrasonic transducers for elevated pressures
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Somerset, William E., Feeney, Andrew, Kang, Lei, Li, Zhichao and Dixon, Steve M. (2022) Design and dynamics of oil filled flexural ultrasonic transducers for elevated pressures. IEEE Sensors Journal, 22 (13). pp. 12673-12680. doi:10.1109/jsen.2022.3178751 ISSN 1558-1748.
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WRAP-Design-dynamics-oil-flexural-ultrasonic-transducers-elevated-pressures-2022.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (2155Kb) | Preview |
Official URL: https://doi.org/10.1109/JSEN.2022.3178751
Abstract
The flexural ultrasonic transducer has traditionally been limited to proximity measurement applications, such as car-parking systems and industrial metrology. Principally, their classical form is unsuitable for environments above atmospheric 1 bar pressure, due to an internal air cavity which creates a pressure imbalance across the transducer’s vibrating membrane. This imbalance leads to physical deformation and degradation of the transducer’s structure, restricting the membrane’s capacity to vibrate at resonance to transmit and receive ultrasound. There is a requirement for ultrasonic sensors which can withstand environments of elevated pressure, for example in ultrasonic gas metering. Recent research demonstrated the dynamic performance of flexural ultrasonic transducers with vented structures, allowing the pressure to balance across the transducer membrane. However, a hermetically sealed transducer is a more practical and robust solution, where the internal components of the transducer, such as the piezoelectric ceramic disc, will be protected from harmful environmental fluids. In this research, the design and fabrication of a new form of flexural ultrasonic transducer for environments of elevated pressure is demonstrated, where the internal air cavity is filled with an incompressible fluid in the form of a non-volatile oil. Dynamic performance is measured through acoustic microphone measurements, electrical impedance analysis, and pulse-echo ultrasound measurement. Together with finite element analysis, stable ultrasound measurement is achieved above 200 bar in air, opening the possibility for reliable ultrasound measurement in hostile environments of elevated pressure.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| SWORD Depositor: | Library Publications Router | ||||||||
| Library of Congress Subject Headings (LCSH): | Ultrasonic transducers , Ultrasonic transducers -- Design and construction, Pressure -- Measurement , Ultrasonics | ||||||||
| Journal or Publication Title: | IEEE Sensors Journal | ||||||||
| Publisher: | Institute of Electrical and Electronics Engineers (IEEE) | ||||||||
| ISSN: | 1558-1748 | ||||||||
| Official Date: | 1 July 2022 | ||||||||
| Dates: |
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| Volume: | 22 | ||||||||
| Number: | 13 | ||||||||
| Page Range: | pp. 12673-12680 | ||||||||
| DOI: | 10.1109/jsen.2022.3178751 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 4 July 2022 | ||||||||
| Date of first compliant Open Access: | 5 July 2022 | ||||||||
| RIOXX Funder/Project Grant: |
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