【摘要】 针对面向工程应用的实验需要,开发了分布式光纤微弯传感实验系统。阐述了实验系统的总体结构设计方案,以及光纤微弯传感器的基本原理和关键技术,搭建了混凝土路面塌陷监测、崩塌滑坡岩土灾害监测2个工程应用项目。系统可实现基于光时域反射仪(OTDR)的光纤微弯传感器衰减检测和分布检测,能监测模拟混凝土路面和模拟岩土山坡在压力下的空洞塌陷和滑坡现象。该系统可作为岩土结构体监测研究和教学实验的实验平台。更多还原

【Abstract】 In view of the experimental requirements for engineering application,a distributed optical fiber micro-bend sensing experimental system has been developed.The design scheme of the overall structure of the experimental system and the basic principle and key technology of the fiber optic micro-bending sensor are expounded upon,and two engineering application projects of the concrete pavement subsidence monitoring and landslide geotechnical disaster monitoring are set up.This system can realize the attenuation detection and distribution detection based on the fiber micro-bending sensor of the optical time domain reflectometer(OTDR),and the cave collapse and landslide phenomena of the simulated concrete pavement and simulated rock-soil slope under pressure are monitored experimentally.This system can be used as an experimental platform for the monitoring research and teaching experiment of geotechnical structures.更多还原