Journal
SENSORS
Volume 12, Issue 11, Pages 15820-15826Publisher
MDPI AG
DOI: 10.3390/s121115820
Keywords
optical based corrosion sensor; etched fibre Bragg grating; Fibre Bragg grating; reinforcement rebar corrosion
Funding
- UM-MOHE High Impact Research Grant [A000007-50001]
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In this paper, we present the development and testing of an optical-based sensor for monitoring the corrosion of reinforcement rebar. The testing was carried out using an 80% etched-cladding Fibre Bragg grating sensor to monitor the production of corrosion waste in a localized region of the rebar. Progression of corrosion can be sensed by observing the reflected wavelength shift of the FBG sensor. With the presence of corrosion, the etched-FBG reflected spectrum was shifted by 1.0 nm. In addition, with an increase in fringe pattern and continuously, step-like drop in power of the Bragg reflected spectrum was also displayed.
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