6 November 2006 Precision multi-point fiber optic temperature sensor
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A time-division multi-point precision temperature sensor based polarization mode interference in polarization maintain fiber was proposed. The sensing principle was demonstrated and a practical mathematical model was obtained. With time division technology, the digital multi-points temperature sensor system was designed and realized. An experimental system was set with digital circuit based on micro-processor. The linearity technology and its precision were investigated. With the mathematical model, the linear output was obtained within -15°C~+55°C and this scheme was proved. The physical 0°C environment was formed with the mixer of ice and water and one hour sensor output in 0°C environment was recorded. Experimental result shows the resolution and stability of the temperature sensor can be better than 0.01°C.
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Li Li, Bo Liu, Yuanhong Yang, "Precision multi-point fiber optic temperature sensor", Proc. SPIE 6357, Sixth International Symposium on Instrumentation and Control Technology: Signal Analysis, Measurement Theory, Photo-Electronic Technology, and Artificial Intelligence, 63574F (6 November 2006); doi: 10.1117/12.717316; https://doi.org/10.1117/12.717316

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