Thermography pattern analysis and separation

Gao, Bin, Bai, Libing, Woo, Wai Lok and Tian, Guiyun (2014) Thermography pattern analysis and separation. Applied Physics Letters, 104 (25). p. 251902. ISSN 0003-6951

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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.

Item Type:	Article
Subjects:	F300 Physics H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Computer and Information Sciences
Depositing User:	Paul Burns
Date Deposited:	01 May 2019 10:20
Last Modified:	10 Oct 2019 19:30
URI:	http://nrl.northumbria.ac.uk/id/eprint/39120

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