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Ultrasound visualization using polymer dispersed liquid crystal sensors
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Edwards, R. S. (Rachel Sian), Trushkevych, Oksana, Eriksson, Tobias J. R., Ramadas, Sivaram Nishal and Dixon, Steve M. (2017) Ultrasound visualization using polymer dispersed liquid crystal sensors. In: 43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Atlanta, GA, USA, 17-22 Jul 2016. Published in: AIP Conference Proceedings, 1806 (1). 020021. ISBN 9780735414747. ISSN 0094-243X.
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Official URL: http://dx.doi.org/10.1063/1.4974562
Abstract
The acousto-optic effect in liquid crystals (LCs) has previously been exploited to build large area acoustic sensors for visualising ultrasound fields, opening up the field of acoustography. There is an opportunity to simplify this technique and open new application areas by employing polymer dispersed LC (PDLC) thin films instead of aligned LC layers. In PDLCs, the normally opaque film becomes transparent under the influence of an acoustic field (e.g. when surface acoustic waves are propagating in the material under the film). This is called acoustic clearing and is visible by eye. There is potential for producing ultrasonic sensors which can be ‘painted on’ to a component, giving direct visualisation of the ultrasonic field without requiring scanning. We demonstrate the effect by using PDLC films to characterise a resonant mode of a flexural air-coupled transducer. Visualisation was quick, with a switching time of a few seconds. The effect shows promise for ultrasound sensing applications for transducer characterisation and NDE.
| Item Type: | Conference Item (Paper) | ||||||
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| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Polymer liquid crystals, Transducers, Nondestructive testing | ||||||
| Journal or Publication Title: | AIP Conference Proceedings | ||||||
| Publisher: | American Institute of Physics | ||||||
| ISBN: | 9780735414747 | ||||||
| ISSN: | 0094-243X | ||||||
| Official Date: | February 2017 | ||||||
| Dates: |
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| Volume: | 1806 | ||||||
| Number: | 1 | ||||||
| Page Range: | 020021 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Date of first compliant deposit: | 27 June 2017 | ||||||
| Date of first compliant Open Access: | 29 June 2017 | ||||||
| Funder: | University of Warwick Energy Global Research Priority | ||||||
| Conference Paper Type: | Paper | ||||||
| Title of Event: | 43rd Annual Review of Progress in Quantitative Nondestructive Evaluation | ||||||
| Type of Event: | Conference | ||||||
| Location of Event: | Atlanta, GA, USA | ||||||
| Date(s) of Event: | 17-22 Jul 2016 | ||||||
| Open Access Version: |
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