In-Fiber Optic Salinity Sensing: A Potential Application for Offshore Concrete Structure Protection

Luo, D. and Li, P. and Yue, Y.C. and Ma, J.X. and Yang, H.Z. (2017) In-Fiber Optic Salinity Sensing: A Potential Application for Offshore Concrete Structure Protection. Sensors, 17 (5). p. 962. ISSN 1424-8220, DOI

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The protection of concrete structures against corrosion in marine environments has always been a challenge due to the presence of a saline solution—A natural corrosive agent to the concrete paste and steel reinforcements. The concentration of salt is a key parameter influencing the rate of corrosion. In this paper, we propose an optical fiber-based salinity sensor based on bundled multimode plastic optical fiber (POF) as a sensor probe and a concave mirror as a reflector in conjunction with an intensity modulation technique. A refractive index (RI) sensing approach is analytically investigated and the findings are in agreement with the experimental results. A maximum sensitivity of 14,847.486/RIU can be achieved at RI = 1.3525. The proposed technique is suitable for in situ measurement and monitoring of salinity in liquid.

Item Type: Article
Funders: National Natural Science Foundation of China (Nos. 51508460; 11402187; 51178390; 51408481), National Post-Doctoral Science Foundation (No. 2015M570838), Natural Science Basic Research Plan in Shaanxi Province of China (No. 2016JQ5017; 2013JQ7003), Postgraduate Research Fund of Shaanxi Province (2016BSHB083), Fundamental Research Funds for the Central Universities, SRF for ROCS, SEM (No. 2013-025)
Uncontrolled Keywords: Concrete structure; Salinity; Fiber optic sensor
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 05 Sep 2018 02:42
Last Modified: 05 Sep 2018 02:42

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