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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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:	Date Event 2013 Published
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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