Cargando…

Fiber-Bragg-Grating-Based Displacement Sensors: Review of Recent Advances

With the development of fiber optical technologies, fiber Bragg grating (FBG) sensors are frequently utilized in structural health monitoring due to their considerable advantages, including fast response, electrical passivity, corrosion resistance, multi-point sensing capability and low-cost product...

Descripción completa

Detalles Bibliográficos
Autor principal: Bonopera, Marco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9414369/
https://www.ncbi.nlm.nih.gov/pubmed/36013697
http://dx.doi.org/10.3390/ma15165561
_version_ 1784775970261041152
author Bonopera, Marco
author_facet Bonopera, Marco
author_sort Bonopera, Marco
collection PubMed
description With the development of fiber optical technologies, fiber Bragg grating (FBG) sensors are frequently utilized in structural health monitoring due to their considerable advantages, including fast response, electrical passivity, corrosion resistance, multi-point sensing capability and low-cost production, as well as high accuracy and resolution over a long period. These characteristics allow FBG to be a proper alternative sensing element for displacement measurements. In this article, the recent sensing advances and principles of detection of FBG-based displacement sensors are illustrated. Specifically, the latest FBG-based displacement technologies are examined from three principles of detection, i.e., wavelength, intensity and phase signal demodulation. Regarding wavelength detection methods, the problem related to the cross-sensitivity can significantly be reduced depending on the new type of cantilever–FBG-based sensing developed. Vice versa, only the packaging method of FBG prestressed between two fixed ends can still avoid the chirp phenomenon in the reflection spectrum. Moreover, to attenuate the influence of temperature variations on the accuracy of FBG displacement sensors, specific temperature self-compensation structures were successfully designed according to the concepts of phase signal demodulation. In future investigations, different elastic structures and gratings manufactured through special fibers and new methodologies for temperature compensation will still highly refine the efficiency of FBG-based displacement sensors.
format Online
Article
Text
id pubmed-9414369
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-94143692022-08-27 Fiber-Bragg-Grating-Based Displacement Sensors: Review of Recent Advances Bonopera, Marco Materials (Basel) Review With the development of fiber optical technologies, fiber Bragg grating (FBG) sensors are frequently utilized in structural health monitoring due to their considerable advantages, including fast response, electrical passivity, corrosion resistance, multi-point sensing capability and low-cost production, as well as high accuracy and resolution over a long period. These characteristics allow FBG to be a proper alternative sensing element for displacement measurements. In this article, the recent sensing advances and principles of detection of FBG-based displacement sensors are illustrated. Specifically, the latest FBG-based displacement technologies are examined from three principles of detection, i.e., wavelength, intensity and phase signal demodulation. Regarding wavelength detection methods, the problem related to the cross-sensitivity can significantly be reduced depending on the new type of cantilever–FBG-based sensing developed. Vice versa, only the packaging method of FBG prestressed between two fixed ends can still avoid the chirp phenomenon in the reflection spectrum. Moreover, to attenuate the influence of temperature variations on the accuracy of FBG displacement sensors, specific temperature self-compensation structures were successfully designed according to the concepts of phase signal demodulation. In future investigations, different elastic structures and gratings manufactured through special fibers and new methodologies for temperature compensation will still highly refine the efficiency of FBG-based displacement sensors. MDPI 2022-08-12 /pmc/articles/PMC9414369/ /pubmed/36013697 http://dx.doi.org/10.3390/ma15165561 Text en © 2022 by the author. 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 Review
Bonopera, Marco
Fiber-Bragg-Grating-Based Displacement Sensors: Review of Recent Advances
title Fiber-Bragg-Grating-Based Displacement Sensors: Review of Recent Advances
title_full Fiber-Bragg-Grating-Based Displacement Sensors: Review of Recent Advances
title_fullStr Fiber-Bragg-Grating-Based Displacement Sensors: Review of Recent Advances
title_full_unstemmed Fiber-Bragg-Grating-Based Displacement Sensors: Review of Recent Advances
title_short Fiber-Bragg-Grating-Based Displacement Sensors: Review of Recent Advances
title_sort fiber-bragg-grating-based displacement sensors: review of recent advances
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9414369/
https://www.ncbi.nlm.nih.gov/pubmed/36013697
http://dx.doi.org/10.3390/ma15165561
work_keys_str_mv AT bonoperamarco fiberbragggratingbaseddisplacementsensorsreviewofrecentadvances