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Front. Inform. Technol. Electron. Eng.  2010, Vol. 11 Issue (10): 762-766    DOI: 10.1631/jzus.C0910716
    
Quasi-distributed sensing network based on coherence multiplexing and spatial division multiplexing for coal mine security monitoring
Tian-hao Xia, Wei-sheng Liu, Bin Zhou, Bo-bo Gu, Chun-sheng Yan*
Centre for Optical and Electromagnetic Research, State Key Lab for Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China
Quasi-distributed sensing network based on coherence multiplexing and spatial division multiplexing for coal mine security monitoring
Tian-hao Xia, Wei-sheng Liu, Bin Zhou, Bo-bo Gu, Chun-sheng Yan*
Centre for Optical and Electromagnetic Research, State Key Lab for Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China
 全文: PDF 
摘要： A low-cost fiber Bragg grating (FBG) sensing system for coal-mine security monitoring is proposed in this paper. Based on the coherence multiplexing (CM) and spatial division multiplexing (SDM) techniques, this hybrid sensing network can support more than 40 sensors for quasi-distributed detection. It is demonstrated experimentally that the multiplexed sensing signal of each sensor can be clearly distinguished by an optical low-coherence reflectometry (OLCR). Methane concentration is detected with maximum sensitivities of an intensity variation of 10.92% and a concentration variation of 1%, using a well-designed sensor structure. Strain and temperature are also detected by this system, which also exhibits good results in the experiment.
关键词： Fiber Bragg grating;  Coherence multiplexing;  Spatial division multiplexing;  Optical low-coherence reflectometry;  Methane concentration    
Abstract: A low-cost fiber Bragg grating (FBG) sensing system for coal-mine security monitoring is proposed in this paper. Based on the coherence multiplexing (CM) and spatial division multiplexing (SDM) techniques, this hybrid sensing network can support more than 40 sensors for quasi-distributed detection. It is demonstrated experimentally that the multiplexed sensing signal of each sensor can be clearly distinguished by an optical low-coherence reflectometry (OLCR). Methane concentration is detected with maximum sensitivities of an intensity variation of 10.92% and a concentration variation of 1%, using a well-designed sensor structure. Strain and temperature are also detected by this system, which also exhibits good results in the experiment.
Key words: Fiber Bragg grating    Coherence multiplexing    Spatial division multiplexing    Optical low-coherence reflectometry    Methane concentration
收稿日期: 2009-11-18 出版日期: 2010-09-30
CLC:  TP212.14  
基金资助: Project (No. 60707020) supported by the National Natural Science Foundation of China
通讯作者: Chun-sheng YAN     E-mail: yancs@coer.zju.edu.cn
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Tian-hao Xia, Wei-sheng Liu, Bin Zhou, Bo-bo Gu, Chun-sheng Yan. Quasi-distributed sensing network based on coherence multiplexing and spatial division multiplexing for coal mine security monitoring. Front. Inform. Technol. Electron. Eng., 2010, 11(10): 762-766.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C0910716    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2010/V11/I10/762

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