Pulsed laser spot imaging thermography, modelling and experimental data

T. Li, D. P. Almond, D. Andrew S. Rees, B. Weekes, S. G. Pickering

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

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 languageEnglish
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
Pages435-442
Number of pages8
DOIs
Publication statusPublished - 1 Apr 2010
Event36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE - Kingston, RI, USA United States
Duration: 26 Jul 200931 Jul 2009

Publication series

NameAIP Conference Proceedings
Volume1211
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE
CountryUSA United States
CityKingston, RI
Period26/07/0931/07/09

Keywords

  • Cracks
  • Image processing
  • Pulsed laser
  • Thermography

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Li, T., Almond, D. P., Rees, D. A. S., Weekes, B., & Pickering, S. G. (2010). Pulsed laser spot imaging thermography, modelling and experimental data. In Review of Progress in Quantitative Nondestructive Evaluation (pp. 435-442). (AIP Conference Proceedings; Vol. 1211). https://doi.org/10.1063/1.3362426