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Optical Fiber Sensors Used for Civil Engineering
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Optical Fiber Sensors Used for Civil Engineering

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Optical Sensors".

Deadline for manuscript submissions: 25 November 2024 | Viewed by 748

Special Issue Editor

Prof. Dr. Michael Sakellariou

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Guest Editor
Laboratory of Structural Mechanics and Engineering Structures, School of Rural, Surveying and Geoinformatics Engineering, National Technical University of Athens (NTUA), Zografos, 15780 Athens, Greece
Interests: geotechnical engineering and geomechanics; numerical and experimental stress analysis; structural health monitoring; stress analysis of tunnels; landslide hazards analysis in GIS environment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Optical fiber sensors (OFs) are a relatively new technology used to measure strain, temperature, and accelerations in situ to monitor the structural performance of civil engineering structures in aerospace and mechanical engineering industries, etc. This technology acts as an extension of strain gauges and other methods used to monitor structures in all scales from scaled-down physical models to real structures. This development is relevant to the need for structural health monitoring (SHM), performance-based design, and improved and versatile methods in experimental mechanics. In this Special Issue, papers reporting on the advanced use of OFS in research and industry are welcome.

Prof. Dr. Michael Sakellariou
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Bragg sensors
  • Brillouin sensors
  • distributed optical fiber sensors
  • structural health monitoring
  • BIM

Published Papers (1 paper)

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Research

14 pages, 4637 KiB  
Article
Fluorescent Probe-Based Fiber Optic Sensor for Real-Time Monitoring of Chloride Ions in Coastal Concrete Structures
by Zhen Lin, Quanfeng Ouyang, Chuanrui Guo and Yiqing Ni
Sensors 2024, 24(12), 3700; https://doi.org/10.3390/s24123700 - 7 Jun 2024
Viewed by 387
Abstract
Coastal concrete structures, such as cross-sea bridges and tunnels, are susceptible to the penetration of chloride ions, which can lead to the deterioration of the passive film on the rebar surface, consequently accelerating the corrosion process. Conventional methods for monitoring chloride ions typically [...] Read more.
Coastal concrete structures, such as cross-sea bridges and tunnels, are susceptible to the penetration of chloride ions, which can lead to the deterioration of the passive film on the rebar surface, consequently accelerating the corrosion process. Conventional methods for monitoring chloride ions typically require in situ drilling for sample collection, thereby compromising efficiency and accuracy. Additionally, real-time monitoring and early warning cannot be achieved. To address these challenges, this work introduces a fluorescent-probe-based fiber optic sensor for monitoring chloride levels in concrete structures. Quinine sulfate was chosen as the fluorescent material due to its exceptional sensitivity to chloride ions and its stability in concrete environments. The proposed sensor was manufactured using sol–gel and 3D-printing techniques. Tests were conducted using concrete simulation fluid and cement mortar specimens. The results demonstrate that the sensitivity of the proposed sensor is greater than 0.01 M, and its accuracy in penetration depth measurement is better than 3 mm. The findings confirm that the designed fiber optic sensor based on quinine sulfate enables real-time monitoring of chloride ions in concrete structures, offering high sensitivity (0.1% in concentration and 2.7 mm in terms of penetration depth), unique selectivity (as it is immune to other ions whose concentrations are 10 times higher than those of Cl−), and a compact size (10 × 20 mm). These attributes render it promising for practical engineering applications. Full article
(This article belongs to the Special Issue Optical Fiber Sensors Used for Civil Engineering)
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