基于布里渊散射的长距离分布式监测网络技术  

Research on Long Distance Distributed Monitoring Network Technique Based on Brillouin Scattering

作　　者：刘德华[1] 宋牟平[2] 金伟良[1] 张恩勇[1] 邵剑文[1] 

机构地区：[1]浙江大学建筑工程学院,杭州310027 [2]浙江大学信电系,杭州310027

出　　处：《科技通报》2004年第5期415-419,共5页Bulletin of Science and Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2001AA602022-1)

摘　　要：研制开发了基于布里渊散射的分布式健康监测网络,实时监测大范围、长距离土木工程结构.通过获取构筑物结构变化的信息,自动预警严重事故,综合评估结构的可靠性.借助分布式系统串联技术解决了超长距离传感问题,利用波分复用技术实现了单根光纤传感与数据通信复用,采用以应变模态概念为基础的结构诊断技术智能分析判断结构状态.单个系统传感距离可达到40km,多级串联后可达到几百公里,空间分辨率 15m,应变分辨率 500με.A health monitoring network based on Brillouin scattering in civil engineering is reported in this paper. The real-time reliability and safety state of the structure can be evaluated through this network system. The long distance sensing problem is solved by series-wound Brillouin OTDR system. Sensing and communication is realized in one optic fiber through WDM. Fabric diagnose based on strain mode is used to analyze structure state. The sensing distance of single system is 40 km. Several hundred kilometers is available by series-wound Brillouin OTDR system. The spatial resolution and strain resolution is less than 15 m and 500 με separately.

关 键 词：光学 土木建筑工程 健康监测 光纤传感器 布里渊散射 分布式 长距离 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置] TU375[自动化与计算机技术—控制科学与工程]