Issue |
MATEC Web Conf.
Volume 357, 2022
25th Polish-Slovak Scientific Conference on Machine Modelling and Simulations (MMS 2020)
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Article Number | 05004 | |
Number of page(s) | 10 | |
Section | Experimental Mechanics, Identification and Validation | |
DOI | https://doi.org/10.1051/matecconf/202235705004 | |
Published online | 22 June 2022 |
Comparison of the Optical Lock-in Thermography using the Reflection Mode and the Transmission Mode
1 University of Zilina, Faculty of Mechanical Engineering, Univerzitna 1, 01026 Zilina, Slovakia
2 TMV SS spol. s r. o., Studankova 395, 14000 Praha, Czech Republic
3 University of Zilina, Faculty of Operation and Economics of Transport and Communications, Univerzitna 1, 01026 Zilina, Slovakia
Optical lock-in thermography is a non-destructive testing method. The surface of the sample is excited using the thermal waves and the response is recorded by the thermal camera. This image thermal sequence is processed using the image processing method named lock-in method. Optical lock-in thermography can be used to detect cracks and damages in metal or composite material. Two position modes are used: the reflection and the transmission mode. In this paper, are compared these two modes. An experiment is carried out on a printed composite plane with the square blinded holes placed in the different depths below the surface. The phase images are created using the lock-in method for both position modes. The results are compared and the advantages and the disadvantage of these position modes find out.
© The Authors, published by EDP Sciences, 2022
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