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THERMAL BARRIER COATING DEBONDING DEFECTS DETECTION BASED ON INFRARED THERMAL WAVE TESTING TECHNOLOGY UNDER LINEAR FREQUENCY MODULATION HEAT EXITATION

ABSTRACT
Thermal barrier coating debonding defects detection based on infrared thermal wave testing technology under linear frequency modulation heat excitation was studied. The principle the infrared thermal wave testing technology under linear frequency modulation was presented. The effects of different light source power and Chirp modulation frequency on signal-to-noise ratio were compared and analyzed. The results show that, defects can be more easily detected with the bigger power of light source, and the signal-to-noise ratio can be increased by using lower initial and termination frequencies.
KEYWORDS
PAPER SUBMITTED: 2018-09-01
PAPER REVISED: 2018-12-02
PAPER ACCEPTED: 2018-12-28
PUBLISHED ONLINE: 2019-05-26
DOI REFERENCE: https://doi.org/10.2298/TSCI180901230L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE 3, PAGES [1607 - 1613]
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© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence