热轧车轮测量中的热光学误差分析

Analysis of Thermal Optic Errors in Hot Rolling Train Wheel Measurements

测量热轧火车轮时,由于周围空气温度场的不均匀,导致空气折射率的不均匀分布,使得光线发生弯曲,从而给测量带来误差.该文利用有限元方法分析热轧车轮周围空气温度场,计算得到相应测位空气折射率的线形分布规律.根据测量光线的弯曲偏移量和偏移方向,合理安排测量工位,避免了光线弯曲对测量结果带来的影响.

In measuring a hot rolling train wheel,optic rays are curved due to the non-uniform distribution of surrounding air temperature,leading to significant errors.Air temperature distribution is analyzed with a finite element method.Linear distribution of refractive index is calculated for certain measurement positions.Reasonable positions are chosen according to the amount and direction of curly light rays so that influence of the ray curvature is avoid.