One channel defect imaging in a reverberating medium

Rodriguez, S., Veidt, M., Castaings, M., Ducasse, E. and Deschamps, M. (2014) One channel defect imaging in a reverberating medium. Applied Physics Letters, 105 24: 244107-1-244107-4. doi:10.1063/1.4904837

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Author Rodriguez, S.
Veidt, M.
Castaings, M.
Ducasse, E.
Deschamps, M.
Title One channel defect imaging in a reverberating medium
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
Publication date 2014-12-15
Sub-type Article (original research)
DOI 10.1063/1.4904837
Open Access Status File (Publisher version)
Volume 105
Issue 24
Start page 244107-1
End page 244107-4
Total pages 4
Place of publication College Park MD, United States
Publisher American Institute of Physics
Collection year 2015
Language eng
Abstract This letter presents an acoustic one-channel location system that takes advantage of the multiple reflections occurring in the reverberating medium under investigation. Experimental results are obtained with guided waves propagating in a bounded aluminum plate. The plate is so designed that there is no direct propagation path between the single transducer and the region of interest in the plate. In that manner, the two-dimensional image obtained in the region of interest is only based on the reverberated acoustic field measured with the single fixed transducer. The method is based on the application of topological optimization methods to wave-based location problems and on a preliminary calibration of the whole system. This calibration mainly consists in measuring the impulse response of the transducer in the region of interest before any object or defect is present. The calibration is here performed with a Laser Doppler velocimeter. The experimental results obtained with this one-channel topological imaging method show accurate location of a single small defect and of multiple small defects, with a resolving power below the wavelength.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 1 times in Scopus Article | Citations
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