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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): 25-27 |
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Rahimi L, Askari A, Arjmand M, Mozafari M. Comparison of using 2-D Non-local means, median methods, and a hybrid of them in the processing of the temperature profile of a distributed fiber Raman sensor. ICOP & ICPET _ INPC _ ICOFS 2021; 28 (1) :25-27
URL: http://opsi.ir/article-1-2499-en.html
URL: http://opsi.ir/article-1-2499-en.html
1- Faculty of Applied Science, Malek-Ashtar University
2- Niroo Research Institute, Tehran, Iran.
2- Niroo Research Institute, Tehran, Iran.
Abstract: (1118 Views)
Fiber optic temperature Raman sensors are among the most important distributed sensors with many practical applications. The low power of Raman Stokes and, especially, anti-Stokes powers caused a considerable influence of the signal-to-noise ratio enhancement method on the accuracy of the measured temperature. In this paper, we have used the median and non-local means methods, and a hybrid of them, to improve the temperature profile of a fiber Raman sensor. Experimental results are presented for a 600 m fiber optic with a temperature step with a length of 20 m and located at a distance of 540 m from the entrance end of the fiber. Signal processing results show the appropriate results by respectively using the median and non-local means methods on the reduction of the temperature measurement error from 2 oC to 0.7 oC.
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