Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Silicon Oil-Based 2-Channel Fiber-Optic Temperature Sensor Using a Subtraction Method

감법을 이용한 실리콘 오일 기반의 2채널 광섬유 온도 센서

  • Lee, Dong Eun (School of Biomedical Engineering, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University) ;
  • Yoo, Wook Jae (School of Biomedical Engineering, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University) ;
  • Shin, Sang Hun (School of Biomedical Engineering, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University) ;
  • Kim, Mingeon (School of Energy Systems Engineering, Chung-Ang University) ;
  • Song, Young Beom (School of Energy Systems Engineering, Chung-Ang University) ;
  • Kim, Hye Jin (School of Energy Systems Engineering, Chung-Ang University) ;
  • Jang, Kyoung Won (School of Biomedical Engineering, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University) ;
  • Tack, Gye Rae (School of Biomedical Engineering, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University) ;
  • Lee, Bongsoo (School of Energy Systems Engineering, Chung-Ang University)
  • 이동은 (건국대학교 의료생명대학 의학공학부, BK21플러스의공학실용기술연구소) ;
  • 유욱재 (건국대학교 의료생명대학 의학공학부, BK21플러스의공학실용기술연구소) ;
  • 신상훈 (건국대학교 의료생명대학 의학공학부, BK21플러스의공학실용기술연구소) ;
  • 김민건 (중앙대학교 에너지시스템공학부) ;
  • 송영범 (중앙대학교 에너지시스템공학부) ;
  • 김혜진 (중앙대학교 에너지시스템공학부) ;
  • 장경원 (건국대학교 의료생명대학 의학공학부, BK21플러스의공학실용기술연구소) ;
  • 탁계래 (건국대학교 의료생명대학 의학공학부, BK21플러스의공학실용기술연구소) ;
  • 이봉수 (중앙대학교 에너지시스템공학부)
  • Received : 2016.09.02
  • Accepted : 2016.09.29
  • Published : 2016.09.30
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Abstract

We developed a 2-channel fiber-optic temperature sensor (FOTS) using a temperature sensing probe, a fiber-optic coupler, transmitting optical fiber, and an optical time domain reflectometer (OTDR). The temperature sensing probe is divided into a sensing probe and a reference probe for accurate thermometry. A sensing probe is composed of a silicon oil, a FC terminator, a brass pipe, and a singlemode optical fiber and the structure of a reference probe is identical with that of the sensing probe excluding a silicon oil. In this study, we measured the modified optical powers of the light signals reflected from the temperature sensing probe placed inside of the water with a thermal variation from 5 to $70^{\circ}C$. Although the optical power of the reference probe was constant regardless of the temperature change, the optical power of the sensing probe decreased linearly as the temperature increased. As experimental results, the FOTS using a subtraction method showed a small difference (i.e., hysteresis) in its response due to heating and cooling. The reversibility and reproducibility of the FOTS were also evaluated.

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References

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