Design of novel highly sensitive sensors for crack detection in metal surfaces : theoretical foundation and experimental validation
Shaterian, Zahra (Gdansk University of Technology. Department of Microwave and Antenna Engineering)
Horestani, Ali K. (Ministry of Science, Research and Technology. Khayyam Research Institute (Irán))
Martín, Ferran (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Mrozowski, Michal (Gdansk University of Technology. Department of Microwave and Antenna Engineering)

Date:	2023
Abstract:	The application of different types of microwave resonators for sensing cracks in metallic structures has been subject of many studies. While most studies have been focused on improving the sensitivity of planar crack sensors, the theoretical foundation of the topic has not been treated in much detail. The major objective of this study is to perform an exhaustive study of the principles and theoretical foundations for crack sensing based on planar microwave resonators, especially defective ground structures (DGS) including complementary split ring resonators (CSRRs). The analysis is carried out from the equivalent circuit model as well as the electromagnetic (EM) field perspectives, and guidelines for the design of crack sensors with high sensitivity are developed. Numerical and experimental validation of the provided theoretical analysis is another aim of this article. With this aim, the developed guidelines are used to design a crack sensor based on a single-ring CSRR. It is shown that the sensitivity of the proposed sensor is almost three times higher than the sensitivity of a conventional double-ring CSRR. Moreover, it is demonstrated that folded dumbbell-shape DGS resonators can be used to achieve even higher sensitivities. The CSRR-based crack sensors presented in this study and other studies available in the literature are only sensitive to cracks with a specific orientation. To address this limitation, a modified version of the DGS is proposed to sense cracks with arbitrary orientations at the cost of lower sensitivity. The performance of all the presented sensors is validated through EM simulation, equivalent circuit model extraction, and measurement of the fabricated prototypes.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Electrical and electronic engineering ; Design, synthesis and processing
Published in:	Scientific reports, Vol. 13 (October 2023) , art. 18540, ISSN 2045-2322

DOI: 10.1038/s41598-023-45556-8
PMID: 37899369

18 p, 2.2 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > CIMITEC-UAB
Articles > Research articles
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