Gas-Flow Sensor using Optical Fiber Bragg Grating(FBG)

• 발행기관: 한국항해항만학회
• 저자명: Joon-Hwan Shim Seok-Je Cho Yung-Ho Yu Kyung-Rak Sohn
• 간행물 정보: 『한국항해항만학회지』제32권 제9호, 717~722쪽, 전체 6쪽
• 주제분류: 공학 > 해양공학
• 파일형태: PDF
• 발행일자: 2008.12.20

영문 초록

We have proposed and demonstrated an gas-flow sensor using optical fiber bragg grating(FBG) The flow sensor Ins no electronics and no mechanical parts in its sensing part and the structure is thus simple and immune to electromagnetic interference(EMU). The FBG sensor was consisted of the sensing element and a coil heater. The metal coil was used to supply the current to the FBG. While some currents supply to the coil, the refractive index of the FBG under the coil is changed and thus the wavelength shift of fiber optic sensor was induced In this work, the wavelength shift according to flow - rate was experimentally studied and was used to evaluate the gas flow- rate in a gas tube. As a result, it was possible to measure the flow - rate in a linear range from 5 to 20ℓ )/ min with a resolution of approximately 1ℓ ) /min at the applied currents of 100 mA and 120 mA The measured sensitivities were 15.3 pm/ ℓ / min for 100 mA and 20.2 pm/ℓ / min for 120 mA.

목차

1. Introduction

2. Experiment

3. Experimental Results and Discussion

4. Conclusion

키워드

Gas flow sensors Flow sensors Optical jiber sensors Fiber bragg grating