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Estimating Thermal Material Properties Using Step-Heating Thermography Methods in a Solar Loading Thermography Setup

: Klein, Samuel; Heib, Tobias; Herrmann, Hans-Georg

Fulltext urn:nbn:de:0011-n-6387873 (6.3 MByte PDF)
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Created on: 18.8.2021

Applied Sciences 11 (2021), No.16, Art. 7456, 12 pp.
ISSN: 2076-3417
European Regional Development Fund ERDF
Journal Article, Electronic Publication
Fraunhofer IZFP ()
solar loading thermography; step-heating thermography; active thermography; thermal effusivity; linear effusivity fit; infrastructure; NDT

This work investigates solar loading thermography applications using active thermography algorithms. It is shown that active thermography methods, such as step-heating thermography, present good correlation with a solar loading setup. Solar loading thermography is an approach that has recently gained scientific attention and is advantageous because it is particularly easy to set up and can measure large-scale objects, as the sun is the primary heat source. This work also introduces the concept of using a pyranometer as a reference for the evaluation algorithms by providing a direct solar irradiance measurement. Furthermore, a recently introduced method of estimating thermal effusivity is evaluated on ambient-derived thermograms.