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http://dx.doi.org/10.9713/kcer.2014.52.4.436

Studies on Optical-fiber Sensor to Monitor Temperature using Reversible Thermochromic Gel Type Cobalt (II) Chloride/Polyvinyl Butyral  

Hwang, KiSeob (Korea Institute of Industrial Technology)
Park, JeaHee (Department of Electronic Engineering, Keimyung University)
Ha, KiRyong (Department of Chemical Engineering, Keimyung University)
Lee, JunYoung (Korea Institute of Industrial Technology)
Publication Information
Korean Chemical Engineering Research / v.52, no.4, 2014 , pp. 436-442 More about this Journal
Abstract
In this study, we developed an optical-fiber sensor using cobalt chloride solution to monitor temperature in real-time between long distance points unaffected by the electro-magnetic wave and the vibration. Cobalt chloride solutions were made using 10% water and 90% ethanol (v/v) solution. The transmittance of these solutions was analyzed on 655 nm using UV-Visible spectrometer regarding temperature change. Also 30.8 mM cobalt chloride solution was gelled by dissolving polyvinyl butyral and the transmittance of this was analyzed on 655 nm regarding temperature change. The results of transmittance and optical power measurement showed decrease of both transmittance and optical power with increase of temperature from 66.8% and 149.5 nW at $25^{\circ}C$ to 7.1% and 48 nW at $70^{\circ}C$, respectively. These results support the possibility of gelled cobalt chloride/polyvinyl butyral as an optical-fiber sensor to monitor temperature change.
Keywords
Temperature Sensing Material; Cobalt (II) Chloride; Polyvinyl Butyral; Transmittance; Optical Power;
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Times Cited By KSCI : 2  (Citation Analysis)
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