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Sensors 2012, 12(11), 15820-15826; doi:10.3390/s121115820
Communication

Optical-Based Sensors for Monitoring Corrosion of Reinforcement Rebar via an Etched Cladding Bragg Grating

1,* , 2
,
1
 and
1
1 Department of Electrical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia 2 Wireless and Photonics Networks Research Centre, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
* Author to whom correspondence should be addressed.
Received: 30 September 2012 / Revised: 22 October 2012 / Accepted: 11 November 2012 / Published: 14 November 2012
(This article belongs to the Section Physical Sensors)
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Abstract

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.
Keywords: optical based corrosion sensor; etched fibre Bragg grating; Fibre Bragg grating; reinforcement rebar corrosion optical based corrosion sensor; etched fibre Bragg grating; Fibre Bragg grating; reinforcement rebar corrosion
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Hassan, M.R.A.; Bakar, M.H.A.; Dambul, K.; Adikan, F.R.M. Optical-Based Sensors for Monitoring Corrosion of Reinforcement Rebar via an Etched Cladding Bragg Grating. Sensors 2012, 12, 15820-15826.

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