| Full distributed fiber optical sensor for intrusion detection in application to buried pipelines |
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| 作者姓名： | 高建忠 蒋庄德 赵玉龙 朱笠 赵国仙 |
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| 作者单位： | Institute of Precision Engineering Xi'an Jiaotong University Xi'an 710049，Institute of Precision Engineering Xi'an Jiaotong University Xi'an 710049，Institute of Precision Engineering Xi'an Jiaotong University Xi'an 710049，Institute of Precision Engineering Xi'an Jiaotong University Xi'an 710049，Tublar Goods Research Center China National Petroleum Cooperation Xi'an 710065 |
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| 基金项目： | This work was supported by the Scientific Study and Technology Development Fund of China National Petroleum Cooperation (CNPC). |
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| 摘 要： | Based on the microbend effect of optical fiber, a distributed sensor for real-time continuous monitoring of intrusion in application to buried pipelines is proposed. The sensing element is a long cable with a special structure made up of an elastic polymer wire, an optical fiber, and a metal wire. The damage point is located with an embedded optical time domain reflectometry (OTDR) instrument. The intrusion types can be indicated by the amplitude of output voltage. Experimental results show that the detection system can alarm adequately under abnormal load and can locate the intrusion point within 22.4 m for distance of 3.023 km.
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