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Proceedings Paper

Methodology of processing experimental data in transient thermal nondestructive testing (NDT)
Author(s): Ermanno G. Grinzato; Vladimir P. Vavilov; Paolo Giulio Bison; Sergio Marinetti; Chiara Bressan
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Paper Abstract

Noise which occurs in space and time temperature evolution is analyzed using three informative parameters: temperature signal over defect, running contrast, and normalized contrast. It is shown that the choice of optimum informative parameter depends on the kind of noise which dominates in a particular experiment. Decrease of noise by passing into time domain is demonstrated. A methodology for creating images of signal-to-noise ratio and probability of correct detection is proposed. Experimental validations were performed for plaster specimens. The proposed methodology allows us to compare various thermal NDT techniques.

Paper Details

Date Published: 28 March 1995
PDF: 12 pages
Proc. SPIE 2473, Thermosense XVII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (28 March 1995); doi: 10.1117/12.204852
Show Author Affiliations
Ermanno G. Grinzato, CNR/ITEF (Italy)
Vladimir P. Vavilov, Tomsk Polytechnic Univ. (Russia)
Paolo Giulio Bison, CNR/ITEF (Italy)
Sergio Marinetti, CNR/ITEF (Italy)
Chiara Bressan, CNR/ITEF (Italy)


Published in SPIE Proceedings Vol. 2473:
Thermosense XVII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications
Sharon A. Semanovich, Editor(s)

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