Optical Fiber Temperature Measurement Technique Based on Fluorescence Mechanism

Abstract:

A kind of fluorescence optic-fiber temperature sensor is studied. It used sapphire fiber thermal probe, making use of the method that FFT transformation to carry on a processing to the fluorescence signal. Among the detection range from 0 to 450°C, the thermometer has an average temperature resolution of 0.4°C. The experimental results show that this temperature measuring system can effectively decrease the influence of instability of light source and intensity variation in measuring channel on measurement results. The system has the advantage of high accuracy, very high temperature resolution, good dynamic response and immunity to the electro-magnetic interference. So it may be used in microwave treatment and thermal monitoring of Medium Voltage Substations.

• Periodical: Applied Mechanics and Materials (Volumes 44-47)
• Pages: 854-858
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.44-47.854
• Online since: December 2010
• Authors: Yu Tian Wang, Xiao Xu Bo, Jin Zhao
• Keywords: Fast Fourier Transform (FFT), Fluorescence Thermometer, Sapphire Optical Fiber

References

[1] Castrellon-UribeJ, PaezG, StrojnnikM. Radiometric analysis of a fiber optic temperature sensor. SPIE. 2002(4486): 164-169.

[2] Clarke D W, Designing phase-locked loops for instrumentation applications Measurement. 2004(3): 205-227.

DOI: 10.1016/s0263-2241(02)00020-9

[3] Grattan K T V, Zhang Zhi-yi. Fiber. optic fluorescence thermometry. London: CHAPMAN & HALL, 2000: 1-200.

[4] Wade S A, Collin S F. Strain-independent temperature measurement by use of a fluorescence intensity ratio technique in optical fiber. Applied Optics. 2000, 39 (18): 3050-3052.

DOI: 10.1364/ao.39.003050