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Localisation of defects with time and frequency measurements using pulsed arrays

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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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Official URL: http://dx.doi.org/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
Faculty of 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:
DateEvent
October 2014Published
28 June 2014Available
19 June 2014Accepted
28 December 2013Submitted
Date of first compliant deposit: 27 December 2015
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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