Time efficient auto-focussing algorithms for ultrasonic inspection of dual-layered media using Full Matrix Capture

Miles Weston; Peter Mudge; Claire Davis; Anthony Peyton

doi:10.1016/j.ndteint.2011.10.006

Time efficient auto-focussing algorithms for ultrasonic inspection of dual-layered media using Full Matrix Capture

Miles Weston, Peter Mudge, Claire Davis, Anthony Peyton

Research output: Contribution to journal › Article › peer-review

Abstract

This paper describesa number ofmethods for calculating the point of incidence at a planarrefractive interface between dual-layered media for ultrasonic applications in the field of non-destructive testing. It is shown how Snells law may be expressed as a quartic polynomial, and solved using analytical or numerical techniques to find the point of incidence at the refractive interface. An array transducer mounted onto a Perspex wedge is used to generate ultrasonic imagery of a double 'v' butt weld in a low carbon steel plate, using the Full Matrix Capture technique. Curve-fitting algorithms are also presented that allowautomated focussingthrough the wedge-plate interface. Finally, a description is given on how algorithms may be adapted to allow auto-focussing through dual media with a non-planar interface. © 2011 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	43-50
Number of pages	7
Journal	NDT and E International
Volume	47
DOIs	https://doi.org/10.1016/j.ndteint.2011.10.006
Publication status	Published - Apr 2012

Keywords

Full Matrix Capture
Non-destructive evaluation
Signal processing
Snells law
Ultrasonic imaging

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10.1016/j.ndteint.2011.10.006

Cite this

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title = "Time efficient auto-focussing algorithms for ultrasonic inspection of dual-layered media using Full Matrix Capture",

abstract = "This paper describesa number ofmethods for calculating the point of incidence at a planarrefractive interface between dual-layered media for ultrasonic applications in the field of non-destructive testing. It is shown how Snells law may be expressed as a quartic polynomial, and solved using analytical or numerical techniques to find the point of incidence at the refractive interface. An array transducer mounted onto a Perspex wedge is used to generate ultrasonic imagery of a double 'v' butt weld in a low carbon steel plate, using the Full Matrix Capture technique. Curve-fitting algorithms are also presented that allowautomated focussingthrough the wedge-plate interface. Finally, a description is given on how algorithms may be adapted to allow auto-focussing through dual media with a non-planar interface. {\textcopyright} 2011 Elsevier Ltd. All rights reserved.",

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author = "Miles Weston and Peter Mudge and Claire Davis and Anthony Peyton",

year = "2012",

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doi = "10.1016/j.ndteint.2011.10.006",

language = "English",

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T1 - Time efficient auto-focussing algorithms for ultrasonic inspection of dual-layered media using Full Matrix Capture

AU - Weston, Miles

AU - Mudge, Peter

AU - Davis, Claire

AU - Peyton, Anthony

PY - 2012/4

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N2 - This paper describesa number ofmethods for calculating the point of incidence at a planarrefractive interface between dual-layered media for ultrasonic applications in the field of non-destructive testing. It is shown how Snells law may be expressed as a quartic polynomial, and solved using analytical or numerical techniques to find the point of incidence at the refractive interface. An array transducer mounted onto a Perspex wedge is used to generate ultrasonic imagery of a double 'v' butt weld in a low carbon steel plate, using the Full Matrix Capture technique. Curve-fitting algorithms are also presented that allowautomated focussingthrough the wedge-plate interface. Finally, a description is given on how algorithms may be adapted to allow auto-focussing through dual media with a non-planar interface. © 2011 Elsevier Ltd. All rights reserved.

AB - This paper describesa number ofmethods for calculating the point of incidence at a planarrefractive interface between dual-layered media for ultrasonic applications in the field of non-destructive testing. It is shown how Snells law may be expressed as a quartic polynomial, and solved using analytical or numerical techniques to find the point of incidence at the refractive interface. An array transducer mounted onto a Perspex wedge is used to generate ultrasonic imagery of a double 'v' butt weld in a low carbon steel plate, using the Full Matrix Capture technique. Curve-fitting algorithms are also presented that allowautomated focussingthrough the wedge-plate interface. Finally, a description is given on how algorithms may be adapted to allow auto-focussing through dual media with a non-planar interface. © 2011 Elsevier Ltd. All rights reserved.

KW - Full Matrix Capture

KW - Non-destructive evaluation

KW - Signal processing

KW - Snells law

KW - Ultrasonic imaging

U2 - 10.1016/j.ndteint.2011.10.006

DO - 10.1016/j.ndteint.2011.10.006

M3 - Article

SN - 0963-8695

VL - 47

SP - 43

EP - 50

JO - NDT and E International

JF - NDT and E International

ER -

Time efficient auto-focussing algorithms for ultrasonic inspection of dual-layered media using Full Matrix Capture

Abstract

Keywords

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