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학술지 Temperature monitoring techniques of power cable joints in underground utility tunnels using a fiber Bragg grating
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김현진, 이미숙, 정우석, 오승희
ICT Express, v.8 no.4, pp.626-632
한국통신학회 (KICS), Elsevier
22HR3500, 디지털트윈 기반 화재재난지원 통합 플랫폼, 정우석
Underground utility tunnels (UUTs), facilities where utilities such as electricity, gas, and telecommunication are concentrated, constitute important infrastructures that help humans with their daily lives. Therefore, it is of utmost importance to protect UUTs from disasters. Power cable accidents in UUT internal facilities mostly occur at the joints of power cables. This paper proposes a temperature sensor module for detecting fires (a disaster that can occur in UUTs) that may occur at the ?쐁able joints?? of cables used in a power distribution grid. Long-distance transmission is possible without interference from electromagnetic waves as the proposed temperature sensor module is based on a fiber optic sensor. Therefore, it is suitable for application in narrow and long UUTs. When light from a broadband light source is sent to the fiber Bragg grating (FBG), signals with different wavelengths according to the temperature are reflected. The optical filter module divides the reflected signal into four wavelengths and demodulates it simultaneously. The signal demodulated through self-referencing had an almost linear characteristic. The adjusted R-squared value, indicating the degree of linearity, was ?돟0.99744, and the temperature resolution of the analysis module was 1 °C. We placed the proposed FBG on an energized cable joint of the power distribution grid and measured the temperature. Herein, we present the configuration of the sensor module and the measured results.
KSP 제안 키워드
Bragg grating(FBG), Broadband light source(BLS), Different wavelengths, Distribution Grid, Electromagnetic waves(EM), Fiber Optic Sensor, Linear characteristic, Long distance transmission, Monitoring techniques, Optical filters, Power cable
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저작자 표시 - 비영리 - 변경금지 (CC BY NC ND)