摘要
研究目的:目前基坑深层水平位移自动化监测和路基隧道等构筑物内部形变自动化监测领域中所用测量传感器普遍使用测斜等轮轴测量设备,存在抗压性较差、监测密度不够详细等问题。本文通过研发具有高强度、高稳定性的阵列式传感器,并针对设备监测过程中发生的旋转误差问题研究多轴实时矫正算法,以实现实时、自动化、高精度监测。研究结论:(1)本文通过软硬件结构设计,将加速度传感芯片、磁力传感芯片和温度传感芯片等高度集成,研发了MEMS三维形变监测仪;(2)本文针对各芯片的输出数据进行解算,开发了各节段位移计算方法;(3)本文利用三轴加速度计和三轴磁力计研发了组合旋转角度计算方法,测试证明了在单节段0.5 m条件下,单节绝对精度优于0.1 mm,系统稳定性优于0.2 mm,航向角绝对精度优于0.5°,航向角稳定性优于0.1°;(4)本文研究可为自动化监测领域提供一种新型设备及自动化监测方法。
Research purposes:At present,the measuring sensors used in the automatic monitoring of deep horizontal displacement of foundation pit and the automatic monitoring of internal deformation of roadbed tunnels and other structures generally use wheel shaft measuring equipment,which has some problems such as poor compression resistance and insufficient detailed monitoring density.The purpose of this paper is to develop an array sensor with high strength and high stability,and to study the multi-axis real-time correction algorithm for the rotation error in the process of equipment monitoring,to realize real-time,automatic and high-precision monitoring.Research conclusions:(1)This paper develops a MEMS three-dimensional deformation monitoring instrument by highly integrating acceleration sensing chips,magnetic sensing chips,and temperature sensing chips through software and hardware structure design.(2)This paper calculates the output data of each chip and develops a displacement calculation method for each segment.(3)This paper develops a combined rotation angle calculation method using threeaxis accelerometers and three-axis magnetometers.The test has proven that under the condition of a single segment of 0.5 m,the absolute accuracy of the single segment is better than 0.1 mm,the system stability is better than 0.2 mm,the absolute accuracy of the heading angle is better than 0.5 degrees,and the heading angle stability is better than 0.1 degrees.(4)The research in this paper can provide a new type of equipment and automatic monitoring method for the field of automatic monitoring.
作者
薛骐
XUE Qi(China Railway Design Corporation,Tianjin 300308,China)
出处
《铁道工程学报》
EI
CSCD
北大核心
2024年第4期84-89,共6页
Journal of Railway Engineering Society
