Development on the laser-based weld flaw identification system

Zhigang Qu, Abdeldjalil Bennecer, Cem Selcuk, Tat-Hean Gan

Research output: Contribution to Book/ReportConference Contributionpeer-review


In this paper, a laser-based flaw identification system is presented for non-destructive inspection of welds. The laser sensor design is based on the laser triangulation principle and the output is a two-dimensional profile of a target sample, which contains basic dimensional information: height and width of the weld. This two-dimensional profile is then processed by a specially devised algorithm based on the local maxima of the sym8 wavelet coefficients accumulation. The positions of artificially created features (notches representative of weld flaws such as surface breaking cracks) on the sample are thereby calculated. It is shown that the laser-based weld flaw identification system is able to reliably and accurately identify and locate surface features ⅓ mm wide.
Original languageEnglish
Title of host publication51st Annual Conference of BINDT
Place of PublicationDaventry, UK
PublisherCurran Associates, Inc.
Number of pages10
ISBN (Print)9781622764372
Publication statusPublished - 2012
EventMeeting held 11-13 September 2012 - Daventry, United Kingdom
Duration: 11 Sept 201213 Sept 2012

Publication series

Name51st Annual Conference of BINDT


ConferenceMeeting held 11-13 September 2012
Country/TerritoryUnited Kingdom


  • Non-Destructive Testing
  • Laser


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