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Proceedings 2018, 2(8), 439;

Excitation Source Optimisation for Active Thermography

Op3Mech Research Group, Faculty of Applied Engineering, University of Antwerp, 2020 Antwerp, Belgium
Acoustics & Vibration Research Group, Department of Mechanical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium
Multimedia and Communication Technology, Karel de Grote University College, Salesianenlaan 90, B-2660 Antwerp, Belgium
Presented at the 18th International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018.
Author to whom correspondence should be addressed.
Published: 11 June 2018
PDF [528 KB, uploaded 22 June 2018]


In active thermography, the use of an optimised excitation source can simplify the interpretation of measurement results. Our custom designed source, especially designed for dynamic line scanning thermography, minimises the needed excitation power and the biasing side effects generated by a wide-range heat source. The source is redesigned, starting from a regular heat source, to focus the available energy such that the needed heating power is provided in a small band. Ray tracing software is used to design absorbers and reflectors to focus the electromagnetic radiation as well as the heat in a thin line. The most optimal design is manufactured and validated on a laminated test sample. The acquired thermographic data are then compared to the data captured in the old-fashioned way with widely available excitation sources. The redesign is also tested on durability and practical use to make sure that it is easy to handle and that it can be used as a long-term solution. Experienced inspectors evaluated the ease of use of it in comparison to the existing sources. A redesigned excitation source minimises the generated biasing side-effects resulting in more energy efficient and safer measurements.
Keywords: infrared thermography; optimisation; reflector infrared thermography; optimisation; reflector
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Verspeek, S.; Peeters, J.; Ribbens, B.; Steenackers, G. Excitation Source Optimisation for Active Thermography. Proceedings 2018, 2, 439.

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