Hill, Sam ORCID: https://orcid.org/0000-0001-6829-1084 and Dixon, Steve (2014) Localisation of defects with time and frequency measurements using pulsed arrays. NDT & E International, 67. pp. 24-30.

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Abstract

The frequency dependent directivity of the periodic permanent magnet transducer is used to 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:	Article
Status:	Published
DOI:	10.1016/j.ndteint.2014.06.008
Subjects:	Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General)
School/Department:	York Business School
URI:	https://ray.yorksj.ac.uk/id/eprint/10526

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