| Title |
Real-time Measurements of Water Level and Temperature using Fiber-optic Sensors Based on an OTDR |
| Authors |
심혁인(Sim, Hyeok In) ; 유욱재(Yoo, Wook Jae) ; 신상훈(Shin, Sang Hun) ; 장재석(Jang, Jaeseok) ; 김재석(Kim, Jae Seok) ; 장경원(Jang, Kyoung Won) ; 조승현(Cho, Seunghyun) ; 문주현(Moon, Joo Hyun) ; 이봉수(Lee, Bongsoo) |
| DOI |
https://doi.org/10.5370/KIEE.2014.63.9.1239 |
| Keywords |
Fiber-optic sensor ; Water Level ; Temperature ; Lophine ; OTDR |
| 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 using 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. |