空间桁架形式的分布式光纤传感网络定量监测边坡位移场  

Quantitative Monitoring of the Displacement Field of Landslides With Distributed Fiber Optical Sensing Network Comparing With the Space Truss Structure

作　　者：胡威 刘炳荣 吴志桥 杨玺 景行 陈瑞华 HU Wei;LIU Bing-rong;WU Zhi-qiao;YANG Xi;JING Xing;CHEN Rui-hua(Jiangmen Power Supply Bureau of Guangdong Power Grid Co.Ltd.,Jiangmen 529000,China;Wuhan Kangpu Changqing Software TechnoIogy Co.Ltd.,Wuhan 430073,China))

机构地区：[1]广东电网有限责任公司江门供电局,广东江门529000 [2]武汉康普常青软件技术股份有限公司,湖北武汉430073

出　　处：《光学与光电技术》2018年第6期11-17,共7页Optics & Optoelectronic Technology

基　　金：广东电网有限责任公司科技项目(GDKJXM20162458)资助

摘　　要：针对目前分布式光纤传感应变监测基本处于定性监测这一不足,通过构造分布式光纤传感网络,实现定量监测边坡的位移场。类比空间桁架结构能够构造静定或超静定光纤传感网络,建立由监测应变到节点位移间的非线性关系式,通过求解非线性方程组或非线性最小二乘问题计算节点位移。数值实验验证了该方法的准确性,并分析了该方法的精度。为定量监测边坡位移场提供了一种新的方法。In view of the current distributed optical fiber sensor strain monitoring,it is in qualitative monitoring.By constructing distributed optical fiber sensing network,the displacement field of slope is monitored quantitatively.Comparing with the space truss structure,a static or ultra-static optical fiber sensing network is constructed,and a nonlinear relationship between monitoring strain and node displacement is established.The node displacement is calculated by solving nonlinear equations or nonlinear least square problems.Numerical experiments verify the accuracy of the method.It provides a new method for measuring slope displacement field quantitatively.

关 键 词：分布式光纤传感网络 位移场 缆单元 非线性最小二乘问题 空间桁架结构 

分 类 号：TU411[建筑科学—岩土工程]