基于光纤传感的边坡实时监测位移转换研究  

Research on Displacement Conversion for Real-time Slope Monitoring Based on Fiber Optical Sensing Technology

作　　者：张晨[1] 谢官模[1] 吴孝清[1] 郑冰[1] 陈刚[1] 

机构地区：[1]武汉理工大学理学院,武汉430070

出　　处：《武汉理工大学学报》2016年第5期49-53,58,共6页Journal of Wuhan University of Technology

基　　金：武汉理工大学自主创新研究基金(2016IB001)

摘　　要：对测斜管所监测的应变提出一种新的位移转换方法,基于等截面悬臂梁模型构造位移函数,根据位移和应变的关系建立矩阵方程,采用Moore-Penrose广义逆方法,通过光纤Bragg光栅应变传感器获取的一系列测点应变值,得到方程各待定系数的最佳最小二乘解,从而方便、准确地获得测斜管所在处边坡任意高度位移值。通过等比例数值模型以及室内缩尺模型验证了文中位移转换方法的准确性,并将其应用于吊水岩边坡的稳定性实时监测,与局部有限元强度折减法相结合来评定边坡的稳定安全性,进一步验证了该转换方法的有效性。A new displacement conversion method was constructed displacement function model by uniform cross-sec- tion cantilever and employed the Moore-Penrose generalized inverse to solve the matrix equation for the displacement. The slope displacement curve was obtain, where inclinometer tube was installed. This displacement conversion method is proved to be accurate through FEM simulation and indoor proportional model experiment. This method is also successful- ly applied in real-time monitoring of Diaoshuiyan slope in combination with FEM strength reduction technique, which fur- ther verifies its effectiveness.

关 键 词：边坡工程 光纤光栅应变传感器 测斜管 位移转换 MOORE-PENROSE广义逆 

分 类 号：P642[天文地球—工程地质学]