Hill, Samuel Joseph and Dixon, Steve M. (2014) Localisation of defects with time and frequency measurements using pulsed arrays. NDT & E International, Volume 67 . pp. 24-30. doi:10.1016/j.ndteint.2014.06.008

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Abstract

The frequency dependent directivity of the periodic permanent magnet transducer is to used extract information about the position of any discontinuities present in a sample. Two approaches are used; narrowband excitation, and broadband pulsed generation. Simultaneous narrowband excitation, with the appropriate frequency, can be used to steer the ultrasound to a particular angle. Broadband excitation emits a wavefront that extends over a large range of angles, with the frequency of the wavefront varying smoothly as a function of angle. Using these two approaches, two-dimensional maps of any defects present in the sample can be obtained.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Ultrasonic testing
Journal or Publication Title:	NDT & E International
Publisher:	Elsevier Sci Ltd.
ISSN:	0963-8695
Official Date:	October 2014
Dates:	Date Event October 2014 Published 28 June 2014 Available 19 June 2014 Accepted 28 December 2013 Submitted
Volume:	Volume 67
Page Range:	pp. 24-30
DOI:	10.1016/j.ndteint.2014.06.008
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access
Funder:	Engineering and Physical Sciences Research Council (EPSRC)

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