Pulsed laser spot imaging thermography and experimental data

Teng Li; Simon G Pickering; D Andrew S Rees; Darryl Almond

Pulsed laser spot imaging thermography and experimental data

Teng Li, Simon G Pickering, D Andrew S Rees, Darryl Almond

Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Abstract

Traditional pulsed thermography is unsuitable for detecting surface breaking cracks predominantly perpendicular to the sample surface. Pulsed laser spot thermal imaging is an effective alternative method. This paper presents modelling results of a full 3-D model of the technique that elucidate the roles of defect geometry and system set up in determining defect detection sensitivity. A new image processing method is also presented that has been applied to extract images of surface cracks in metal test-pieces. Both 3-D modelling and experimental results show that scanning pulsed laser spot thermography has considerable potential as a remote, non-contact imaging technique for surface cracks with openings of only a few micrometers.

Original language	English
Title of host publication	Review of Progress in Quantitative Nondestructive Evaluation vols 29A and 29B
Publisher	American Institute of Physics
Pages	435-442
Number of pages	8
Volume	1211
ISBN (Print)	9780735407480
Publication status	Published - 2010
Event	36th Annual Review of Quantitative Nondestructive Evaluation - University of Rhode Island, Kingston, USA United States Duration: 26 Jul 2009 → 31 Jul 2009

Publication series

Name	AIP Conference Proceedings
Publisher	American Institute of Physics

Conference

Conference	36th Annual Review of Quantitative Nondestructive Evaluation
Country	USA United States
City	University of Rhode Island, Kingston
Period	26/07/09 → 31/07/09

Access to Document

http://www.qndeprograms.org/qnde.html

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Li, T, Pickering, SG , Rees, DAS & Almond, D 2010, Pulsed laser spot imaging thermography and experimental data. in Review of Progress in Quantitative Nondestructive Evaluation vols 29A and 29B. vol. 1211, AIP Conference Proceedings, American Institute of Physics, pp. 435-442, 36th Annual Review of Quantitative Nondestructive Evaluation, University of Rhode Island, Kingston, USA United States, 26/07/09.

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abstract = "Traditional pulsed thermography is unsuitable for detecting surface breaking cracks predominantly perpendicular to the sample surface. Pulsed laser spot thermal imaging is an effective alternative method. This paper presents modelling results of a full 3-D model of the technique that elucidate the roles of defect geometry and system set up in determining defect detection sensitivity. A new image processing method is also presented that has been applied to extract images of surface cracks in metal test-pieces. Both 3-D modelling and experimental results show that scanning pulsed laser spot thermography has considerable potential as a remote, non-contact imaging technique for surface cracks with openings of only a few micrometers.",

author = "Teng Li and Pickering, {Simon G} and Rees, {D Andrew S} and Darryl Almond",

year = "2010",

language = "English",

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AU - Li, Teng

AU - Pickering, Simon G

AU - Rees, D Andrew S

AU - Almond, Darryl

PY - 2010

Y1 - 2010

N2 - Traditional pulsed thermography is unsuitable for detecting surface breaking cracks predominantly perpendicular to the sample surface. Pulsed laser spot thermal imaging is an effective alternative method. This paper presents modelling results of a full 3-D model of the technique that elucidate the roles of defect geometry and system set up in determining defect detection sensitivity. A new image processing method is also presented that has been applied to extract images of surface cracks in metal test-pieces. Both 3-D modelling and experimental results show that scanning pulsed laser spot thermography has considerable potential as a remote, non-contact imaging technique for surface cracks with openings of only a few micrometers.

AB - Traditional pulsed thermography is unsuitable for detecting surface breaking cracks predominantly perpendicular to the sample surface. Pulsed laser spot thermal imaging is an effective alternative method. This paper presents modelling results of a full 3-D model of the technique that elucidate the roles of defect geometry and system set up in determining defect detection sensitivity. A new image processing method is also presented that has been applied to extract images of surface cracks in metal test-pieces. Both 3-D modelling and experimental results show that scanning pulsed laser spot thermography has considerable potential as a remote, non-contact imaging technique for surface cracks with openings of only a few micrometers.

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VL - 1211

T3 - AIP Conference Proceedings

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BT - Review of Progress in Quantitative Nondestructive Evaluation vols 29A and 29B

PB - American Institute of Physics

T2 - 36th Annual Review of Quantitative Nondestructive Evaluation

Y2 - 26 July 2009 through 31 July 2009

ER -