水电站库区两岸边坡地质状况复杂多变,边坡的稳定工作状态与水电站的安全运行息息相关,本文在雅砻江官地水 电站库区左岸边坡覆盖层处,将 MEMS 姿态传感器(陀螺仪和加速度计)按照阵列方式布置在边坡上,建立边坡稳定状态数 据实时采集系统,利用初始对准确定导航目标参数姿态、方位、速度和位置的初始值,计算出目标姿态矩阵,再通过姿态矩阵 实时将 MEMS 姿态传感器获取的载体系下的加速度和角速度转换到导航系下,用于实时计算边坡变化姿态矩阵和位移开展 试验研究。 试验结果表明,将 MEMS 姿态传感器应用到边坡位移监测中能够实现边坡表面位移数据的实时获取,位移数据 获取精度能够达到毫米级,满足工程实际使用需求,该项研究成果对边坡表面位移稳定状态进行实时监测分析具有十分重 要的意义。
The geological conditions of the slopes on both sides of the reservoir area of the hydropower station are complex and changeable. The stable working condition of the slopes is closely related to the safe operation of the hydropower station. In this paper, the MEMS attitude sensors (gyroscopes and accelerometers) are arranged on the slopes by the array mode at the left slope cover layer of the reservoir area of the Yalong River Guandi Hydropower Station. Using the initial alignment, a real-time slope stability data acquisition system is established to determine the navigation target parameters′ attitude, orientation, velocity and position. The initial values of philosophy, bearing, speed and position are calculated. Then the acceleration and angular momentum under the load system acquired by the MEMS attitude sensors are converted to the navigation system in real-time through the attitude matrix, which is used to calculate the slope change attitude matrix and displacement in real time to carry out experimental research. The experimental results show that applying the MEMS attitude sensor to slope displacement monitoring can achieve real-time acquisition of slope surface displacement data. The displacement data acquisition accuracy can reach the millimetre level to meet the actual needs of engineering. The research results are of great significance to the real-time monitoring and analysis of the stable state of slope surface displacement.
虎 勇,吕辉岩,李绍荣,邹 力,任颖慧,梁 杰. MEMS 姿态传感器在边坡表面位移监测的应用研究[J].电子测量与仪器学报,2023,37(7):53-61复制