基于BOFDA的PE管道微弯变形检测方法  

Detection method of PE pipe microbending deformation based on BOFDA

作　　者：冯维一 刘礼华 张旭苹[2] 赵霞 方玄 谢永宏 FENG Weiyi;LIU Lihua;ZHANG Xuping;ZHAO Xia;FANG Xuan;XIE Yonghong(Fasten Group Co.Ltd.,Wuxi Jiangsu 214433,China;Post-Doctoral Research Station of Materials and Engineering,Nanjing University,Nanjing 210008,China)

机构地区：[1]法尔胜泓昇集团有限公司,江苏无锡214433 [2]南京大学材料与工程博士后流动站,南京210008

出　　处：《光通信技术》2020年第12期33-36,共4页Optical Communication Technology

基　　金：江苏省科技成果转化项目(BA2019011)资助;国家重点研发计划光纤传感系统应用示范项目(2017YFB0405505)资助;国家博士后基金面上项目(2019M661704)资助。

摘　　要：为监测埋地管道因地质不稳定产生的弯曲变形情况,提出了一种基于布里渊光频域分析(BOFDA)技术的聚乙烯(PE)管道微弯检测方法。将玻璃纤维基带应变光缆沿管壁胶粘敷设,使光纤与管道协同变形,通过布里渊频移量计算得到光纤应力变化值,并采用共轭梁重构算法反演管道弯曲扰度。实验结果表明:该方法能够很好地分辨和测量管道弯曲的方向和位移量,误差小于0.4 cm,提升了管道的数字化安全监测和预警水平。In order to monitor the bending deformation of buried pipelines due to geological instability,a method of polyethylene(PE)pipeline microbending detection based on Brillouin optical frequency domain analysis(BOFDA)technology is proposed in this paper.The fiberglass substrate strain cable is laid along the wall of the pipe to make the fiber and the pipe deform together.The Brillouin frequency shift is used to calculate the stress variation of the fiber,and conjugate beam reconstruction algorithm is used to invert the bending disturbance of the pipe.The experiment resulshows that this method can distinguish and measure the direction and displacement of pipe bending very well,and the error is less than 0.4 cm,which improves the digital safety monitoring and early warning level of pipe.

关 键 词：光纤传感 布里渊频移 管道变形 布里渊光频域分析 智慧管道 

分 类 号：TN29[电子电信—物理电子学]