基于光纤传感技术在边坡监测中的应用研究

Side Slope monitoring based on fiber sensoring technology

FBG和BOTDR是两种最具代表性的分布式光纤传感技术,国内外工程界都已开展了将这两种技术用于边坡滑坡监测的尝试。FBG通过测量其反射光波长的变化获得应变和温度信息,BOTDR通过检测后向布里渊散射的频移实现分布式应变、温度信息的获取。分别介绍了FBG和BOTDR传感技术,并给出了针对国内某边坡滑坡监测的分别基于FBG和BOTDR的技术方案。

FBG and BOTDR are two typical technologies in distributed optical fiber sensing field,whose application in slope sliding monitoring has initialized research at home and aboard. By measuring wavelength change of reflected lights,FBG technology helps acquire the information of strain and temperature,while BOTDR technology measures the frequency shift of backscattered Brillouin light to obtain distributed strain and temperature information. This paper introduces the FBG and BOTDR technologies and provides several technical proposals of slope sliding monitoring based on these two technologies for one pratical project in China.