Methodology of processing experimental data in transient thermal nondestructive testing (NDT)

Ermanno G. Grinzato; Vladimir P. Vavilov; Paolo Giulio Bison; Sergio Marinetti; Chiara Bressan

doi:10.1117/12.204852

28 March 1995 Methodology of processing experimental data in transient thermal nondestructive testing (NDT)

Ermanno G. Grinzato, Vladimir P. Vavilov, Paolo Giulio Bison, Sergio Marinetti, Chiara Bressan

Proceedings Volume 2473, Thermosense XVII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications; (1995) https://doi.org/10.1117/12.204852
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

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.

Citation Download Citation

Ermanno G. Grinzato, Vladimir P. Vavilov, Paolo Giulio Bison, Sergio Marinetti, and Chiara Bressan "Methodology of processing experimental data in transient thermal nondestructive testing (NDT)", Proc. SPIE 2473, Thermosense XVII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (28 March 1995); https://doi.org/10.1117/12.204852

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