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Fiber Grating-Based Strain Sensor Array for Health monitoring of pipelines

Structural Durability & Health monitoring 2019年第4期13卷 347-359页

作者： Hui Wang Songyou Li Lei Liang Gang Xu Bin Tu National Engineering Laboratory for Fiber Optic Sensing Technology and College of Information Engineering Wuhan University of TechnologyWuhan430070China Guiyang Bureau CSG EHV Power Transmission CompanyGuiyang550000China National Engineering Laboratory for Fiber Optic Sensing Technology Wuhan University of TechnologyWuhan430070China National Engineering Laboratory of Fiber Sensing Technology Wuhan University of TechnologyWuhan430070China School of Mechanical Engineering Hubei Engineering UniversityXiaogan432000China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Zhongshan528437China

pipelines are one of the most important modern energy transportation methods,used especially for the transportation of certain dangerous energy media materials such as crude oil,natural gas,and chemical raw *** requirements have been put forward for the health monitoring and early security warning of pipelines because of the large-scale and complicated development trend of the pipe network *** achieve an accurate assessment of the health conditions of pipeline infrastructure,obtaining as many precise operating parameters as possible,particularly at some critical parts of the pipeline,is ***,a novel type of fiber grating strain sensor array is proposed herein to monitor the pipeline hoop *** sensor utilizes fiber grating characteristics such as light weight,corrosion resistance,remote transmission,and strong environmental *** fiber containing the grating measurement points is implanted into the composite material to complete the sensitization encapsulation and protection of the bare fiber *** design of the sensor array fulfills the requirements for monitoring pipeline mass data,making it easy to form a pipeline health monitoring sensor *** sensor sensitivity is researched by using a combination of theoretical and experimental analysis.A sensitivity test,as well as linearity and stability tests,are performed on the *** experimental results show that the average sensitivity of the sensor is 14.86 pm/με,and the error from the theoretical calculation analysis value is 8.75%.Due to its high reliability,good linear response and long-term stability,and the ability to reflect the exact strain change of the outer wall of the pipeline,the designed sensor can support longterm online pipeline *** fiber grating sensor array network has successfully realized the monitoring of the pipeline’s internal operation by using external strain *** addition to the performance benefits,there are other

关键词： Strain sensor array fiber grating composite material monitoring pipeline

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