scholarly journals Distributed optical fiber temperature sensor using only anti-Stokes Raman scattering light in a loop configuration

2011 ◽  
Author(s):  
Marcelo A. Soto ◽  
Alessandro Signorini ◽  
Tiziano Nannipieri ◽  
Stefano Faralli ◽  
Gabriele Bolognini ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Optical Fiber ◽  
Temperature Sensor ◽  
Scattering Light ◽  
Distributed Optical Fiber ◽  
Anti Stokes

Temperature Calibration of Distributed Optical Fiber Temperature Sensor Based on Raman Scattering

2015 ◽  
Vol 44 (5) ◽  
pp. 506006 ◽  
Author(s):  
汤玉泉 TANG Yu-quan ◽  
孙苗 SUN Miao ◽  
李俊 LI Jun ◽  
杨爽 YANG Shuang ◽  
Brian Culshaw Brian Culshaw ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Optical Fiber ◽  
Temperature Sensor ◽  
Temperature Calibration ◽  
Distributed Optical Fiber

A Calibration Method for Distributed Optical Fiber Temperature Sensor

2010 ◽  
Vol 44-47 ◽  
pp. 2774-2777
Author(s):  
Le Chen ◽  
Xiao Li Zhang ◽  
Yan Song
Keyword(s):  
Optical Fiber ◽  
Temperature Sensor ◽  
Environmental Temperature ◽  
Calibration Method ◽  
Measurement Precision ◽  
Temperature Calibration ◽  
Calibration Technique ◽  
Calibration Methods ◽  
Accurate Temperature ◽  
Distributed Optical Fiber

Based on the principle of the distributed optical fiber temperature sensor, the research with temperature calibration technique for temperature measurement precision of system was studied in this paper. Accurate temperature was gotten by standards of environmental temperature thermometer, with different temperature calibration methods to solve the accuracy problem of the distributed optical fiber temperature sensor.

Distributed Optical Fiber Raman Signal Noise Cancellation Based on Empirical Mode Decomposition

2012 ◽  
Vol 198-199 ◽  
pp. 1621-1626 ◽  
Author(s):  
You Ping Zhong ◽  
Qi Zhang ◽  
Di Zhou
Keyword(s):  
Optical Fiber ◽  
Empirical Mode Decomposition ◽  
Signal To Noise Ratio ◽  
Noise Cancellation ◽  
Raman Signal ◽  
Signal To Noise ◽  
Mode Decomposition ◽  
Improve Measurement ◽  
Distributed Optical Fiber ◽  
Anti Stokes

The distributed optical fiber Raman sensor system was widely used for real-time measurement temperature, but the Anti-Stokes and Stokes scattering Raman signal is very weak. In order to improve measurement accuracy the signal must be denoised before obtaining the temperature. In this paper, a new noise cancellation of empirical mode decomposition is proposed for enhancing signal-to-noise ration of the Anti-Stokes and Stokes scattering Raman signal. The signal-to-noise ratio was enhanced by using this method and it is easy to be realized in computer.

Spatial Resolution Improvement of Distributed Optical Fiber Raman Temperature Sensor System by Using Amplitude Modification Algorithm

2013 ◽  
Vol 552 ◽  
pp. 393-397
Author(s):  
Zhong Xie Jin ◽  
Hai Peng Zhu
Keyword(s):  
Optical Fiber ◽  
Spatial Resolution ◽  
Temperature Sensor ◽  
High Spatial Resolution ◽  
Sensor System ◽  
Fiber Axis ◽  
Temperature Changes ◽  
Amplitude Coefficient ◽  
Resolution Improvement ◽  
Distributed Optical Fiber

Spatial resolution is an important parameter in distributed optical fiber Raman temperature sensor system (DOFRTS). In this paper, a 10 kilometers long DOFRTS with spatial resolution of about 6 meters is constructed. The spatial resolution is limited by electrical bandwidth of the photodetector circuit and the data acquisition part. The abrupt temperature changes along the fiber axis are treated as temporal pulse signals, and a linear amplitude coefficient modification algorithm is used to improve the spatial resolution. The experimental results show that the temperature amplitudes from 3 meters region to 6 meters can be modified accurately. Therefore, a DOFRTS of high spatial resolution but low system cost could be successfully constructed.

Stability Analysis of Distributed Optical Fiber Temperature Sensor (DTS) System

2011 ◽  
Author(s):  
Chuanlong Hu ◽  
Jianfeng Wang ◽  
Zaixuan Zhang ◽  
Yongxing Jin ◽  
Huaping Gong ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Optical Fiber ◽  
Temperature Sensor ◽  
Distributed Optical Fiber
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