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Lock-In Thermography with Cooling for the Inspection of Composite Materials

This paper presents the development of the lock-in thermography system with an additional cooling system. System feasibility is tested by investigating a square-shaped glass fiber-reinforced polymer (GFRP) with artificially made outer flaws. The influence of heating mode and sinusoidal excitation pe...

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Detalles Bibliográficos
Autores principales: Łukaszuk, Ryszard Dymitr, Marques, Rafael Monteiro, Chady, Tomasz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10648542/
https://www.ncbi.nlm.nih.gov/pubmed/37959521
http://dx.doi.org/10.3390/ma16216924
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author Łukaszuk, Ryszard Dymitr
Marques, Rafael Monteiro
Chady, Tomasz
author_facet Łukaszuk, Ryszard Dymitr
Marques, Rafael Monteiro
Chady, Tomasz
author_sort Łukaszuk, Ryszard Dymitr
collection PubMed
description This paper presents the development of the lock-in thermography system with an additional cooling system. System feasibility is tested by investigating a square-shaped glass fiber-reinforced polymer (GFRP) with artificially made outer flaws. The influence of heating mode and sinusoidal excitation period on the defect detectability is considered. Thus, the experiment is split into two modes: the sample is solely heated in the first mode or simultaneously heated and cooled in the second. In each mode, the temperature measurement is performed first with a shorter excitation signal period and second with a longer one. The signal-to-noise ratio (SNR) is used to assess defect detection quantitatively. The comparative analysis shows that employing a mixed heating–cooling mode improves the SNR compared to the conventional heating mode. The further enhancement of the SNR is obtained by extending the excitation period. The combination of simultaneous heating and cooling with longer periods of the excitation signal allows for the best SNR values for the most detected defects.
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spelling pubmed-106485422023-10-28 Lock-In Thermography with Cooling for the Inspection of Composite Materials Łukaszuk, Ryszard Dymitr Marques, Rafael Monteiro Chady, Tomasz Materials (Basel) Article This paper presents the development of the lock-in thermography system with an additional cooling system. System feasibility is tested by investigating a square-shaped glass fiber-reinforced polymer (GFRP) with artificially made outer flaws. The influence of heating mode and sinusoidal excitation period on the defect detectability is considered. Thus, the experiment is split into two modes: the sample is solely heated in the first mode or simultaneously heated and cooled in the second. In each mode, the temperature measurement is performed first with a shorter excitation signal period and second with a longer one. The signal-to-noise ratio (SNR) is used to assess defect detection quantitatively. The comparative analysis shows that employing a mixed heating–cooling mode improves the SNR compared to the conventional heating mode. The further enhancement of the SNR is obtained by extending the excitation period. The combination of simultaneous heating and cooling with longer periods of the excitation signal allows for the best SNR values for the most detected defects. MDPI 2023-10-28 /pmc/articles/PMC10648542/ /pubmed/37959521 http://dx.doi.org/10.3390/ma16216924 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Łukaszuk, Ryszard Dymitr
Marques, Rafael Monteiro
Chady, Tomasz
Lock-In Thermography with Cooling for the Inspection of Composite Materials
title Lock-In Thermography with Cooling for the Inspection of Composite Materials
title_full Lock-In Thermography with Cooling for the Inspection of Composite Materials
title_fullStr Lock-In Thermography with Cooling for the Inspection of Composite Materials
title_full_unstemmed Lock-In Thermography with Cooling for the Inspection of Composite Materials
title_short Lock-In Thermography with Cooling for the Inspection of Composite Materials
title_sort lock-in thermography with cooling for the inspection of composite materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10648542/
https://www.ncbi.nlm.nih.gov/pubmed/37959521
http://dx.doi.org/10.3390/ma16216924
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