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Active damping of ultrasonic receiving sensors through engineered pressure waves
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Dixon, Steve M., Kang, Lei, Feeney, Andrew and Somerset, William (2021) Active damping of ultrasonic receiving sensors through engineered pressure waves. Journal of Physics D: Applied Physics, 54 (13). 13LT01. doi:10.1088/1361-6463/abd582
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Official URL: https://doi.org/10.1088/1361-6463/abd582
Abstract
Transducers for ultrasonic sensing and measurement are often operated with a short burst signal, for example a few cycles at a specific excitation voltage and frequency on the generating transducer. The vibration response of a narrowband transducer in detection is usually dominated by resonant ringing, severely affecting its ability to detect two or more signals arriving at the receiver at similar times. Prior researchers have focused on strategies to damp the ringing of a transducer in transmission, to create a temporally short output pressure wave. However, if the receiving transducer is narrowband, the incident pressure waves can create significant ringing of this receiving transducer, irrespective of how temporally short the incident pressure waves are on the receiving transducer. This can reduce the accuracy of common measurement processes, as signals are temporally long and multiple wave arrivals can be difficult to distinguish from each other. In this research, a method of damping transducers in reception is demonstrated using a flexural ultrasonic transducer. This narrowband transducer can operate effectively as a transmitter or receiver of ultrasound, and due to its use in automotive applications, is the most common ultrasonic transducer in existence. An existing mathematical analog for the transducers is used to guide the design of an engineered pressure wave to actively damp the receiving flexural ultrasonic transducer. Experimental measurements on transducers show that ultrasonic receiver resonant ringing can be reduced by 80%, without significantly compromising sensitivity and only by using a suitable driving voltage waveform on the generating transducer.
| 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 Faculty of Science > Physics |
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| Library of Congress Subject Headings (LCSH): | Ultrasonic transducers, Sound-waves -- Damping, Ultrasonic waves | ||||||||
| Journal or Publication Title: | Journal of Physics D: Applied Physics | ||||||||
| Publisher: | IOP Publishing | ||||||||
| ISSN: | 0022-3727 | ||||||||
| Official Date: | 20 January 2021 | ||||||||
| Dates: |
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| Volume: | 54 | ||||||||
| Number: | 13 | ||||||||
| Article Number: | 13LT01 | ||||||||
| DOI: | 10.1088/1361-6463/abd582 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access | ||||||||
| RIOXX Funder/Project Grant: |
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