Lasagni, Fernando; CATEC - Advanced Center for Aerospace Technologies; Spain
Fernándes, R.; CATEC - Advanced Center for Aerospace Technologies; Spain
González, S.; CATEC - Advanced Center for Aerospace Technologies; Spain
García, C.; Tecnatom S.A.; Spain
Cuevas, E.; Tecnatom S.A.; Spain
Lasagni, F.; CATEC - Advanced Center for Aerospace Technologies; Spain
Infrared Thermography (IRT) methods have experienced a strong growth during the last decade, extending their application fields to multiple industrial sectors as aerospace, energy, naval, automotive, etc. Reason is the fact that IRT is a fast and portable inspection procedure, where a short calibration time is required, enabling a significant reduction of the lead time. Internal defects are detected and their external dimensions and location on the component surface determined. The weak point of this technique is the lack of accurate data about defect position in component thickness: traditional IRT techniques only provide qualitative information about depth, being possible to distinguish if defects are close to front or rear surface, according to the time where they are identified in the infrared sequence.
In this work, advanced post-processing methods, based on Thermographic Signal Reconstruction (TSR) technique, have been applied for analysing infrared sequences. This procedure merges the information from the whole sequence in only one thermal image where quantitative data about defects depth are included.