真空管磁浮列车T形槽轨平顺度检测方法研究及应用

Research and application of T-shaped groove smoothness detection method for evacuated tube maglev train

针对T形槽轨平顺度的测量、分析与调整方法进行了研究,旨在解决T形槽轨建设中难以对其平顺度进行检测和分析的问题采用自由测站测量技术在管内构建高精度三维控制网.解决了因管内环境条件限制而难以建立测量基准的问题;基于此控制网,釆用自由设站测呈与极坐标测址法相结合的技术测得槽轨上各测点的三维坐标,为槽轨平顺度的分析提供了基础数据;为对槽轨平顺度质量进行判定,运用统计分析方法将槽轨上各测点的偏差悄况量化为4项统计指标.结果表明选用的4项指标能够定量和全面地反映槽轨平顺度质量;为提高槽轨平顺度,提出了基于槽轨上各测点的偏差计算调整量和据此对槽轨进行精调的方法.结果表明该方法能显著提高槽轨平顺度。

This paper does some research works of the measurement,analysis and adjustment methods based on T-shaped grooved rail smoothness,aiming at solving the problem that it is difficult to detect and analyze the smoothness of T-shaped grooved rail under constmction.The high-precision three-dimensional control network is built in the tube by using the free station measurement technology,which solves the problem that it is difficult to establish the measurement reference due to the limitation of the environmental conditions in the tube.Based on the control network,the three-dimensional coordinates of each measuring point on the grooved rail are measured by using the technique of free station measurement and polar coordinate measurement,which provides the basic data for the analysis of T-shaped grooved rail smoothness.In order to determine the smoothness quality of the grooved rail,the deviation of each measuring point on the grooved rail is quantified into four statistical indexes by statistical analysis method.The results show that the selected four indexes can quantitatively and comprehensively reflect the smoothness quality of the grooved rail.In order to improve the smoothness of the grooved rail,a method is proposed to calculate the adjustment amount based on the deviation of each measuring point on the grooved rail and to fine adjustment.The results show that the method can significantly improve the smoothness of the grooved rail.