Initial Study and Verification of a Distributed Fiber Optic Corrosion Monitoring System for Transportation Structures
For this study, a novel optical fiber sensing system was developed and tested for the monitoring of corrosion in transportation systems. The optical fiber sensing system consists of a reference long period fiber gratings (LPFG) sensor for corrosive environmental monitoring and a LPFG sensor coated with a thin film of nano iron and silica particles for steel corrosion monitoring. The environmental effects (such as pH and temperature) are compensated by the use of the reference LPFG sensor. The sensor design, simulation, and experimental validation were performed in this study to investigate the feasibility of the proposed sensing system for corrosion and environment monitoring. The detailed investigations of the proposed sensing system showed that within the detection limitation of the thin coated layer, the proposed sensor could monitor both the initial and stable corrosion rate consistently. Compared to the traditional electrochemical method, the proposed optical fiber sensing system has a converter coefficient of 1 nm/day=3.746×10-3 A/cm2. Therefore, the proposed nano iron/silica particles dispersed polyurethane coated optical fiber sensor can monitor the critical corrosion information of the host members in real time and remotely. With multiple LPFGs in a single fiber, it is possible to provide a cost effective, distributed monitoring solution for corrosion monitoring of large scale transportation structures.
- Summary URL:
- Record URL:
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Supplemental Notes:
- This document is disseminated under the sponsorship of the U.S. Department of Transportation, University Transportation Centers Program.
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Corporate Authors:
Mid-America Transportation Center
University of Nebraska-Lincoln
2200 Vine Street, PO Box 830851
Lincoln, NE United States 68583-0851Research and Innovative Technology Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Xiao, Hai
- Chen, Genda
- Gao, Zhan
- Huang, Ying
- Tang, Fujian
- Publication Date: 2012-7
Language
- English
Media Info
- Media Type: Digital/other
- Edition: Final Report
- Features: Figures; Photos; References; Tables;
- Pagination: 62p
Subject/Index Terms
- TRT Terms: Corrosion; Environmental monitoring; Fiber optics; Monitoring; Sensors; Steel structures; Structural health monitoring
- Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; I60: Maintenance;
Filing Info
- Accession Number: 01469911
- Record Type: Publication
- Report/Paper Numbers: 25-1121-0001-345, MATC-MST: 345
- Files: UTC, NTL, TRIS, ATRI, USDOT
- Created Date: Jan 17 2013 1:56PM