GD-220光电经纬仪轴系的精度分析

光电经纬仪中轴系的精度在很大程度上决定着整台仪器的测量精度.为了提高其轴系精度和改进其轴系结构,以GD-220光电经纬仪为例,讨论了其垂直轴系和水平轴系中存在的径向跳动误差、角度摆动误差和轴向窜动误差等,并定量分析了由构成轴系零件的形位误差造成的轴系在回转运动时的晃动误差.通过对9台套GD-220光电经纬仪轴系的检测结果看,对GD-220光电经纬仪轴系精度的分析和对其结构的设计都是合理的.

Analysis of the axial accuracy of the GD-220 photoelectric theodolite

The axial accuracy of a photoelectric theodelite greatly determines the measuring accuracy of the whole instrument. Taking the photoelectric theodolite GD-220 as an example, this paper discusses various kinds of errors in the vertical and horizontal axial systems i.e. radial runout, angular swing and axial shifting, and quantitatively analyzes the axial swing error caused by the surface figure error and position error of the axial system parts. The measured results of 9 sets of GD-220 photoelectric theodolites are listed, showing that the analysis of the axial accuracy and structure design of the axial system are both reasonable.