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Proceedings Paper

D2D: a robust transient thermography NDT technique for real-time in-field measurements
Author(s): Alberto Braggiotti; Sergio Marinetti; Andrea Mazzoldi
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Paper Abstract

Not always during in-field measurements it is possible to reproduce laboratory conditions. This is especially true in thermography-based techniques which are most likely to be affected by unwanted external heat fluxes. Typical examples of parasitic heat sources may be spatial heater unevenness, reflections, heater power variations in time, real external heat flux sources, specimen curvature variation, misplacement of heater effects, etc. These heat sources contribute to reduce the overall SNR. As a consequence, a technique perfectly working in laboratory, when ported to field environment may not yield the expected results. Moreover the repeatability of the measurement is not ensured due to the randomness of these sources. D2D is a transient thermography technique based on moving a linear heater over a specimen's surface and recording the thermal evolution of the hated surface by means of a thermal imager.

Paper Details

Date Published: 31 March 1998
PDF: 6 pages
Proc. SPIE 3397, Nondestructive Evaluation of Aging Aircraft, Airports, and Aerospace Hardware II, (31 March 1998); doi: 10.1117/12.305046
Show Author Affiliations
Alberto Braggiotti, Istituto di Sistemica e Bioingegenaria (Italy)
Sergio Marinetti, Istituto per la Tecnica del Freddo (Italy)
Andrea Mazzoldi, Istituto per lo Studio della Dinamica delle Grande Masse (Italy)

Published in SPIE Proceedings Vol. 3397:
Nondestructive Evaluation of Aging Aircraft, Airports, and Aerospace Hardware II
Glenn A. Geithman; Gary E. Georgeson, Editor(s)

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