Thermography pattern analysis and separation

Bin Gao*, Libing Bai, W. L. Woo, Guiyun Tian

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

Analysis of thermography spatial-transient patterns has considerable potential to enable automatic identification and quantification of defects in non-destructive testing and evaluation. This Letter proposes a non-negative pattern separation model for eddy current pulsed thermography to automatically extract important spatial and time patterns according to the transient thermal sequences without any pre-training or prior knowledge. In particular, the method is scale-invariant, such that large differences in surface emissivity,hot spots, and cool areas with dynamic range of thermal contrast can be extracted. Finally, an artificial slot in a steel sample with shining, black strip on the surface is tested to validate the proposed method.

Original languageEnglish
Article number251902
Number of pages5
JournalApplied Physics Letters
Volume104
Issue number25
Early online date23 Jun 2014
DOIs
Publication statusE-pub ahead of print - 23 Jun 2014

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