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Real-time measurements of water level and temperature using fiber-optic sensors based on an OTDR광섬유와 OTDR을 이용한 실시간 수위 및 온도 측정
- Other Titles
- 광섬유와 OTDR을 이용한 실시간 수위 및 온도 측정
- Authors
- Sim, H.I.; Yoo, W.J.; Shin, S.H.; Jang, J.; Kim, J.S.; Jang, K.W.; Cho, S.; Moon, J.H.; Lee, B.
- Issue Date
- Sep-2014
- Publisher
- Korean Institute of Electrical Engineers
- Keywords
- Fiber-optic sensor; Lophine; OTDR; Temperature; Water level
- Citation
- Transactions of the Korean Institute of Electrical Engineers, v.63, no.9, pp.1239 - 1244
- Volume
- 63
- Number
- 9
- Start Page
- 1239
- End Page
- 1244
- ISSN
- 1975-8359
- Abstract
- In this study, two fiber-optic sensors were fabricated to measure water level and temperature using optical fibers, a coupler, a Lophine and an OTDR (optical time-domain reflectometer). First, using Fresnel's reflection generated at the distal-ends of each optical fiber, which was installed at different depth, we measured the water level according to the variation of water level. Next, we also measured the temperature of water tising a temperature sensing probe based on the Lophine, whose absorbance changes with the temperature. The measurable temperature range of the fiber-optic sensor is from 5°C to 65°C because the maximum operation temperature of the optical fiber without a physical deterioration is up to 80°C.
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Related Researcher
- Cho, Seung hyun
- College of Engineering (Department of Materials Science and Engineering)