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Temperature measurement by multifiber optical sensor

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3 Author(s)
Betta, G. ; Cassino Univ., Italy ; Pietrosanto, A. ; Scaglione, A.

The paper deals with a new multifiber temperature sensor, based on the relationship between temperature and the refractive index of a suitable reference liquid, which replaces a part of the fiber cladding. The sensing element, the microcontroller-based hardware, and the artificial neural network (ANN)-based measurement software are described. The results of the tests carried out in the range 40°C-110°C showed good prototype accuracy and repeatability (both contained within ±0.5°C)

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Instrumentation and Measurement, IEEE Transactions on  (Volume:49 ,  Issue: 5 )