Abstract
Optical fiber sensors have great potential for application in civil construction, especially in the field of structural health monitoring. However, one of the barriers to the diffusion of these sensors is allied to the fact that their implementation is quite expensive, mainly due to the high price of commercial optical interrogators. Therefore, the present work seeks to develop a low-cost optical interrogation system. For this, the present study proposes the development of this system based on the use of tunable filters and edge filters in the monitoring of low and high frequencies, and consequent digital processing of the collected signals through the find_picks algorithm and the Fourier transform. As a result, it was possible to observe the adequate functioning of the tunable filters, with the validation of the system using a FBG, and a previous simulation for the edge filter system with frequencies superior to 100 kHz.
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Acknowledgements
All authors acknowledge the FAPES, FUNCAP, FCT, FEDER, CENTRO 2020 and CNPq for financial and technical support.
Funding
This work was financially supported by FUNCAP, Project 01172921/2022 – Cientista Chefe Cultura, by the National Council for Scientific and Technological Development (CNPq) – Project 302054/2022–7, and CAPES Foundation. Israel Sousa was funded by FUNCAP with a scholarship under the academic scholarship program. Camilo A. R. Diaz was funded by FAPES, grant no. 2021-45D4X, and CNPq, grant no. 310668/2021–2. Luis Pereira was funded by FCT, with grant reference SFRH/BD/146295/2019. This work is also funded by the European Regional Development Fund (FEDER), through the Regional Operational Programme of Lisbon (POR LISBOA 2020) and the Regional Operational Programme of Centre (CENTRO 2020) of the Portugal 2020 framework [Project Safe-Home with Nr. 072082 (CENTRO-01-0247-FEDER-072082)].
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CD: Conceptualization, methodology, investigation, data curation, writen—original draft, writing—review and editing, funding acquisition, supervision, project administration; IS: Conceptualization, methodology, investigation, data curation, writen—original draft, writing—review and editing; EM: Conceptualization, methodology, investigation, data curation, writen—original draft, writing—review and editing; LP: Conceptualization, methodology, investigation, data curation, writen—original draft, writing—review and editing; NA: Conceptualization, methodology, investigation, data curation, writen—original draft, writing—review and editing; PA: Conceptualization, methodology, investigation, data curation, writen—original draft, writing—review and editing.
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Diaz, C., Sousa, I., Mesquita, E. et al. Low-cost optical interrogator system for structural health monitoring. J Build Rehabil 8, 54 (2023). https://doi.org/10.1007/s41024-023-00313-2
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DOI: https://doi.org/10.1007/s41024-023-00313-2