摘要
车载平台的变形对车载经纬仪测角精度将产生一定的影响,使车载经纬仪难以达到高精度测量的目的。为了测量车载平台的变形,分析了车载平台的变形原因和变形范围,提出了利用双轴倾角传感器对车载平台变形进行测量的技术。首先,介绍了倾角传感器的工作原理和技术指标。然后,采用有限元方法对光电经纬仪垂直轴变形进行了分析,建立了光电经纬仪的三维有限元模型。最后,通过分析建立的模型可知,垂直轴上部节点位移变形值为0.868 6μm,下部节点位移变形值为0.289 5μm。数据分析结果表明:车载经纬仪工作时,垂直轴整体变形差异很小。据此将倾角传感器安装在垂直轴下部,为实现车载经纬仪高精度测量提供了理论依据和技术支持。
The deformation of vehicular platform will have a certain influence on the angle measuring precision of the vehicular theodolite, so it is difficult to reach high-precision measurement for the vehicular theodolite. In order to measure the deformation of vehicular platform, this paper analyzes the deformation cause and bound of vehicular platform, and presents the technology to measure the deformation of vehicular platform based on inclinometer. First, the working principle and technical criterion of the inclinometer is introduced. Then, the finite element analysis is used to analyze the vertical axes deformation of phototheodolite, and the three-dimensional finite element model of theodolite is built. Finally,it is concluded that the above deformation of vertical axes is 0. 868 6 μm, the below de- formation of vertical axes is 0. 289 5 μm. The data analysis shows that the deformation difference of vertical axes is very small when vehicular theodolite is working. The inclinometer is fixed in the underside of vertical axes based on above conclusion, it provides a theoretical reference and technical support for high-precision measurement of vehicu- lar theodolite.
出处
《电子测量与仪器学报》
CSCD
2013年第9期837-843,共7页
Journal of Electronic Measurement and Instrumentation
基金
中国科学院三期创新工程和长春光机所所内创新工程(Y10532B110)
关键词
车载经纬仪
变形
倾角传感器
有限元分析
vehicular theodolite
deformation
inclinometer
finite element analysis
