大型结构应变场光纤分布监测系统

A Distributed Optic Fiber Type Monitoring System Used for Large Scale Structural Strain Field

研究了一种用于大型工程结构应变、变形状态监测的基于光时域反射技术的分布式光纤应变传感系统。设计了一种新型的光纤微弯传感器结构 ,用于对沿传感光纤分布各测量点的应变信息进行提取 ;在此新结构的基础上 ,研究了全光纤型应变传感器串行阵列 ,以对构件应变测量和安全监测为主要目标 ,建立起了分布光纤应变实时监测系统。进行了系统实验 ,得到了良好的结果。

A distributed optic fiber type strain sensing system based on optical time domain reflectometer and used for monitoring large scale structural strain and deformation state is studied in the paper.A new optic fiber minor bend sensor structure used for extracting strain information of various points along the distributed optic fiber is designed.A serial array of optic fiber strain sensor based on the new structure is developed.With the strain measurement of structural components and safety monitoring as main objective,a real-time distributed optic fiber type strain monitoring system is constructed.Some systematic experiments are carried out and good results have been achieved.