A critical analysis and possible modifications of two analytical models for defects sizing using Video Pulse Thermography
- Resource Type
- Authors
- G. Bottazzi; P. Teruzzi; F. Cernuschi; N. Ludwig
- Source
- Proceedings of the 1998 International Conference on Quantitative InfraRed Thermography.
- Subject
- Defect sizing
Surface (mathematics)
Materials science
law
Acoustics
Thermal
Heat pulse
Plane wave
Pulse thermography
Diaphragm (optics)
Sizing
law.invention
- Language
Two models describing the surface thermal contrast of a sample (containing a sub-surface defect) during a pulse thermography experiment are compared. For both models, multiple reverberations have been taken into account and the effect of the plane wave approximation in treating heat pulse reflections has been analysed by the introduction in the models of a suitable "diaphragm" . Moreover for one model an extension to different defects has been proposed. Finally a defect sizing algorithm has been theoretically studied.