钢屏蔽实验室表面平整度检测及分析

采用钢板连续拼装建造钢屏蔽仿真实验室,要求拼装初步完成时进行内表面平整度检测,并分析平整度是否达到最大平面误差不大于±3 mm的要求。针对工作场地小、精度要求高、非接触测量等检测特点,采用高精度全站仪和短基线空间测角交会法进行检测,计算空间最弱点的点位中误差小于±1.5 mm,表明该法满足平整度检测的精度要求。结合内表面121个测点的三维坐标,采用平面方程进行拟合,偏差的最大值为2.91 mm,全部测点满足平整度限差要求。

Detection and analysis of surface smoothness of steel shielding laboratories

A steel shielding simulation laboratory was built by using continuous assembling of steel plates.The smoothness of the inner surface of the steel shielding laboratory was required when it was preliminarily completed.The requirement whether or not the maximum plane error for the smoothness was not larger than ±3 mm was analyzed.With regard to the detecting characteristics of small site,high precision and non-contact survey,the high-precision total station and the method of space angular intersection based on the short baselines was employed.The mean square error of a space weakest point was smaller than ±1.5 mm,indicating that the proposed method can satisfy the precision requirements of detecting smoothness.Based on the three-dimensional coordinates with 121 survey points on the inner surface,the plane equation was employed for the fitting,and the maximum deflection was 2.91 mm.All the survey points satisfied the requirements of smoothness.