Performance Improvement of Raman Distributed Temperature System by Using Noise Suppression
In Raman distributed temperature system, the key factor for performance improvement is noise suppression, which seriously affects the sensing distance and temperature accuracy. Therefore, we propose and experimentally demonstrate dynamic noise difference algorithm and wavelet transform modulus maximum (WTMM) to de-noising Raman anti-Stokes signal. Experimental results show that the sensing distance can increase from 3 km to 11.5 km and the temperature accuracy increases to 1.58 °C at the sensing distance of 10.4 km.
KeywordsOptical fiber sensors Raman scattering noise suppression wavelet transform modulus maximum
This work is supported by the National Natural Science Foundation of China (NSFC) under Grant Nos. 61377089 and 61527819, by Shanxi Province Natural Science Foundation under Grant No. 2015011049, by Research Project by Shanxi Province Youth Science and Technology Foundation under Grant No. 201601D021069, and by Research Project Supported by Shanxi Scholarship Council of China under Grant No. 2016-036; Key Science and Technology Research Project based on Coal of Shanxi Province (MQ2014-09), by program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi, by Program for Sanjin Scholar.
- C. Shen, C. Hu, H. Gong, J. Wang, Y. Jin, and Z Zhang, “Distributed optical fiber temperature sensor,” Applied in Underground Coal Gasification System, 2010, 7990: 302–303.Google Scholar
- Y. Liu, T. Lei, Z. H. Sun, C. Wang, and T. Y. Li, “Application of distributed optical fiber temperature system in online monitoring and fault diagnosis of smart grid,” in Proceeding of Asia-Pacific Power and Energy Engineering Conference, Jinan, China, 2012, pp. 27–29.Google Scholar
- M. Sun, Y. Q. Tang, J. Li, and F. Z. Dong, “Study on spatial resolution improvement of distributed temperature sensor system by linear fitting algorithm,” in Proceeding of the Chinese-Society-for-Optical-Engineering on Applied Optics and Photonics, Beijing, China, 2015, pp. 5–7.Google Scholar
- X. Feng, X. T. Zhang, C. G. Sun, M. H. Motamedi, and F. Ansari, “Stationary wavelet transform method for distributed detection of damage by fiber-optic sensors,” American Society of Civil Engineers, 2014, 140(4): 04013004-1‒04013004-11.Google Scholar
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.