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year 28, Issue 1 (1st Iranian Conference on optical fiber sensors (ICOFS 2021) 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 28(1): 49-51 |
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Arjmand M, Rahimi-Nezhad L, Askari A A, Mozafari M. Implementation of temperature calibration of Raman distributed sensor for temperature measurement along optical fiber. ICOP & ICPET _ INPC _ ICOFS 2021; 28 (1) :49-51
URL: http://opsi.ir/article-1-2508-en.html
URL: http://opsi.ir/article-1-2508-en.html
1- Faculty of Applied Sciences, Malek-Ashtar University of Technology, Isfahan, Iran
2- Niroo research Institute, Tehran, Iran
2- Niroo research Institute, Tehran, Iran
Abstract: (768 Views)
In this paper, we describe the procedure of temperature calibration of backscattered signals in Raman distributed fiber sensor. Considering different sources of attenuation in the optical fiber, the received signals should be corrected by introducing a linear power-loss per length of the fiber. Moreover, the received signals depend on the parameters of the optical fiber, laser, detector and other components of sensor system, which are temperature dependent and can change over time. To eliminate these effects and accurately determine the temperature from the received signals, these parameters must be specified continuously through the temperature calibration of the sensor. We did this by placing a reference fiber coil in a constant temperature bath to determine the unknown parameters and accordingly the temperature distribution along the optical fiber. The results show a good agreement between the temperatures obtained at each point of the sensing fiber with the actual temperature applied to it.
Keywords: Temperature calibration, Fiber optic sensor, Distributed temperature sensor, Accurate temperature measurement
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