Pitzadura bertikalen detekzio eta karakterizazioa termografia infragorria eta laser mugikorra erabiliz
- 1 Fisika Aplikatua I Saila Gasteizko Ingeniaritza Eskola Euskal Herriko Unibertsitatea
- 2 Fisika Aplikatua I Saila BilbokoIngeniaritza Eskola Euskal Herriko Unibertsitatea
ISSN: 0214-9001
Year of publication: 2020
Issue: 37
Pages: 211-220
Type: Article
More publications in: Ekaia: Euskal Herriko Unibertsitateko zientzi eta teknologi aldizkaria
Abstract
In this paper, we introduce a method for detecting and characterising infinite vertical cracks in large samples by means of active infrared thermography and flying spot technique. We scan the sample surface by a focused laser spot moving at constant speed, and we measure the temperature at the surface with an infrared camera. The vertical cracks act as a thermal barrier and they create a discontinuity in the surface temperature. Fitting the theoretical model that we have developed to the experimental data, we can characterise the cracks. The model we have developed is valid for a moving laser and, also, for a static laser and a moving sample; the latter is very interesting for in-line characterisation of defects in industry. In this work, we show the work our research group has done in order to characterise vertical cracks and we present some measurements and their results for calibrated samples.