光纤传感技术在山体滑坡的应用  

Application of Optical Fiber Sensing Technology to Landslides

作　　者：刘邦[1] 刘京诚[1] 朱正伟[2,3] 

机构地区：[1]重庆大学光电工程学院,重庆400044 [2]重庆大学土木工程学院,重庆400045 [3]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045

出　　处：《压电与声光》2012年第1期27-32,共6页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(50808187;51178488);重庆市建设科技基金资助项目(城科字第(2009)71号)

摘　　要：因边坡不稳定造成的山体滑坡一直是自然界较大的灾害,数十年来人们不断在寻求如何更好地监测滑坡的前期信息,并建立了一些常用监测方法,但其各有优缺点。随着光纤传感技术的发展,利用光纤来进行监测具有很多传统方法无法比拟的优点,该文阐述了光纤传感的基本原理,分析了光纤功率损耗、光时域反射(OTDR)、布里渊光时域射(BOTDR)、光纤光栅(FBG)及其衍生技术,提出了一种全新的、基于光时域反射技术的复合光纤装置及监测方法,它能实现高初始精度、大量程和滑坡运动方向的判定。The mountain landslide has been the disaster which makes great harm in the nature.People have been looking for better monitoring of the preceding information to the landslide.A number of commonly used monitoring methods have been developed,but they have both advantages and disadvantages.With the development of optical fiber sensing technology,it is found that monitoring optical fiber has many advantages comparing with traditional methods.In this paper,the basic principal of optical fiber sensing technology is described;and technologies of optical power consumption,Optic Time Domain Reflectometry（OTDR）,Brillouin Optic Time Domain Reflectometer（BOTDR） and Fiber Bragg Grating（FBG） are analyzed.A new composite optical fiber testing device based on optical fiber monitoring method is proposed.The device based on optical time domain reflectometry can achieve high initial accuracy,large range and direction of the judge.

关 键 词：滑坡 光纤传感 监测 复合光纤装置 

分 类 号：TN253[电子电信—物理电子学]