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Ultrasonic metal sheet thickness measurement without prior wave speed calibration

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Dixon, S., Petcher, P. A., Fan, Yichao, Maisey, D. and Nickolds, Piers (2013) Ultrasonic metal sheet thickness measurement without prior wave speed calibration. Journal of Physics D: Applied Physics, Volume 46 (Number 44). Article number 445502. doi:10.1088/0022-3727/46/44/445502

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Official URL: http://dx.doi.org/10.1088/0022-3727/46/44/445502

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Abstract

Conventional ultrasonic mensuration of sample thickness from one side only requires the bulk
wave reverberation time and a calibration speed. This speed changes with temperature, stress,
and microstructure, limiting thickness measurement accuracy. Often, only one side of a
sample is accessible, making in situ calibration impossible. Non-contact ultrasound can
generate multiple shear horizontal guided wave modes on one side of a metal plate. Measuring
propagation times of each mode at different transducer separations, allows sheet thickness to
be calculated to better than 1% accuracy for sheets of at least 1.5 mm thickness, without any
calibration.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Metals, Ultrasonic waves -- Industrial applications, Calibration , Physical measurements
Journal or Publication Title: Journal of Physics D: Applied Physics
Publisher: IOP Publishing
ISSN: 0022-3727
Official Date: 2013
Dates:
DateEvent
2013Published
Volume: Volume 46
Number: Number 44
Page Range: Article number 445502
DOI: 10.1088/0022-3727/46/44/445502
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: Engineering and Physical Sciences Research Council (EPSRC)
Grant number: EP/I03160X/1 (EPSRC)

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