Proceedings ArticleDOI
Thermal nondestructive evaluation of scaling in boiler tubes
Sanjay Awasthi,Ravibabu Mulaveesala,Suneet Tuli +2 more
- Vol. 6541, pp 654114
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TLDR
In this article, a novel data analysis method, based on variations of slopes in temperature-time profiles approach has been adopted, to estimate subsurface scale thickness and material loss in the tubes.Abstract:
This paper highlights the modeling, simulation and detection of deposited scales in boiler tubes by Pulsed Thermography (PT). A novel data analysis method, based on variations of slopes in Temperature-Time profiles approach has been adopted, to estimate subsurface scale thickness and material loss in the tubes. The slopes are obtained for different pixels in the field of view of the captured image sequence during transient heating of the boiler tube. Relative thickness variations due to material loss and the deposited scales of boiler tube have been estimated from the calculated slopes. Experimental results are presented in support.read more
Citations
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Proceedings ArticleDOI
Non-destructive testing of steel sample by non-stationary thermal wave imaging
TL;DR: In this paper, the authors demonstrate an application of non-stationary frequency modulated thermal wave imaging technique for the numerical characterization of a mild steel sample containing random shape defects and compare their detectabilities by taking signal to noise ratio into consideration.
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Testing and evaluation of glass fiber reinforced polymers by thermal wave imaging
TL;DR: In this paper, a Gaussian window on the captured thermal profile in a frequency modulated thermal wave imaging (GWFMTWI) technique was introduced to detect surface and sub-surface defects.
References
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Journal ArticleDOI
Reconstruction and enhancement of active thermographic image sequences
TL;DR: In this paper, the authors proposed a deterministic active thermographic response is deterministic, to the extent that the postexcitation time evolution for a defect-free sample can be accurately predicted using a simple one-dimensional model.
Journal ArticleDOI
Lock-in thermography for nondestructive evaluation of materials
Datong Wu,Gerd Busse +1 more
TL;DR: In this paper, the phase sensitive modulation thermography (or "lock-in thermography") combines the advantages of photothermal radiometry with the fast technique of infrared imaging thereby revealing hidden defects in a short time.
Journal ArticleDOI
Theory of frequency modulated thermal wave imaging for nondestructive subsurface defect detection
Ravibabu Mulaveesala,Suneet Tuli +1 more
TL;DR: In this paper, the authors provided the theory and mathematical analysis in support of a recently proposed frequency modulated thermal wave imaging for nondestructive subsurface defect detection in solids.
Journal ArticleDOI
Defect detection by pulse compression in frequency modulated thermal wave imaging
Suneet Tuli,Ravibabu Mulaveesala +1 more
TL;DR: In this paper, a new, quantitative, whole field, non-contact and non-destructive technique for sub-surface defect detection is presented based on frequency modulated thermal wave imaging (FMTWI).
Journal ArticleDOI
A novel and robust thermal wave signal reconstruction technique for defect detection in lock-in thermography
TL;DR: In this paper, a robust thermal wave signal reconstruction (TWSR) technique has been derived from the properties of the transient state surface temperature, which can be utilized for defect detection, given sufficient time for periodic heating, the surface temperature will evolve periodically in a sinusoidal pattern from the transient states to the steady state.