USE OF MEMS ACCELEROMETERS/INCLINOMETERS AS A GEOTECHNICAL MONITORING METHOD FOR GROUND SUBSIDENCE
USE OF MEMS ACCELEROMETERS/INCLINOMETERS AS A GEOTECHNICAL MONITORING METHOD FOR GROUND SUBSIDENCE
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DOI：
10.13168/agg.2014.0015
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发表时间：
2014-01-01
影响因子：
0.9
通讯作者：
Azzam, Rafig
中科院分区：
文献类型：
--
作者：
Li, Cheng;Fernnandez-Steeger, Tomas M.;Azzam, Rafig
加速度计和倾斜仪是惯性传感器，能够测量沿各轴方向的地球重力场的相应大小。利用惯性导航方法相关的旋转矩阵，可以将三维加速度计或二维倾角计的输出值转换处理成被监测目标的方位角和倾角。近年来，随着微机电系统（MEMS）和无线传感器网络（WSN）的快速发展和成本的降低，工程师们能够在施工过程中进行实时无线岩土监测。本文在上海红梅南路超高速公路隧道施工现场，利用自主研发的无线MEMS监测系统对地面进行了为期一天的测量，通过特定方式利用旋转矩阵，将原始数据处理成代表地面变化的三维法向量表达式。在统一同一坐标系下的矢量后，我们通过评估截面倾角和传感器节点方位角来进行简要的地面沉降分析。
Accelerometer and inclinometer are inertial sensors capable of measuring corresponding magnitude of Earth gravitational field along the direction of each axis. By means of rotation matrices related to inertial navigation methods, the output values of a three-dimensional accelerometer or a two-dimensional inclinometer can be transformed and processed into the azimuth and dip angle of the monitored target. With the rapid growth in development and cost reduction of Micro Electro Mechanical Systems (MEMS) and Wireless Sensor Network (WSN) in recent years, the engineers are able to carry out real-time wireless geotechnical monitoring during construction. In this paper, we set up a one-day measurement implemented by a self-developed wireless MEMS monitoring system on the surface in the construction site of South Hongmei Road super high way tunnel in Shanghai, by making use of rotation matrices in specific ways, the raw data are processed to expressions of three-dimensional normal vectors that represent the change of the ground. After unifying the vectors in the same coordinate system, we conduct a brief ground settlement analysis by means of an evaluation of the dip angles in the cross section and the azimuths of the sensor nodes.