Crack imaging by scanning pulsed laser spot thermography

Teng Li; Darryl P Almond; D Andrew S Rees

doi:10.1016/j.ndteint.2010.08.006

Crack imaging by scanning pulsed laser spot thermography

Teng Li, Darryl P Almond, D Andrew S Rees

Department of Mechanical Engineering

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

122 Citations (SciVal)

Abstract

A new crack imaging technique is presented that is based on second derivative image processing of thermal images of laser heated spots. Experimental results are shown that compare well with those obtained by the dye penetrant inspection method. A 3D simulation has been developed to simulate heat flow from a laser heated spot in the proximity of a crack. A 'ghost point' method has been used to deal efficiently with cracks having openings in the micometre range. Results are presented showing the effects of crack geometry and system parameters on thermal images of laser heated spots.

Original language	English
Pages (from-to)	117-123
Number of pages	7
Journal	NDT and E International
Volume	18
Issue number	1
DOIs	https://doi.org/10.1016/j.ndteint.2010.08.006
Publication status	Published - Jan 2011

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10.1016/j.ndteint.2010.08.006

Cite this

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title = "Crack imaging by scanning pulsed laser spot thermography",

abstract = "A new crack imaging technique is presented that is based on second derivative image processing of thermal images of laser heated spots. Experimental results are shown that compare well with those obtained by the dye penetrant inspection method. A 3D simulation has been developed to simulate heat flow from a laser heated spot in the proximity of a crack. A 'ghost point' method has been used to deal efficiently with cracks having openings in the micometre range. Results are presented showing the effects of crack geometry and system parameters on thermal images of laser heated spots.",

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year = "2011",

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AB - A new crack imaging technique is presented that is based on second derivative image processing of thermal images of laser heated spots. Experimental results are shown that compare well with those obtained by the dye penetrant inspection method. A 3D simulation has been developed to simulate heat flow from a laser heated spot in the proximity of a crack. A 'ghost point' method has been used to deal efficiently with cracks having openings in the micometre range. Results are presented showing the effects of crack geometry and system parameters on thermal images of laser heated spots.

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Crack imaging by scanning pulsed laser spot thermography

Abstract

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COMBINED REMOTE THERMOGRAPHY AND NON-CONTACT ULTRASONIC INSP ECTION TECHNIQUES USING PULSED LASER EXCITATION

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Crack imaging by scanning pulsed laser spot thermography

Abstract

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COMBINED REMOTE THERMOGRAPHY AND NON-CONTACT ULTRASONIC INSP ECTION TECHNIQUES USING PULSED LASER EXCITATION

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