摘要
中子谱仪样品台是实现样品上待测量点精确移动到衍射点并实现待测量矢量与Q散射矢量对齐的功能,从而进行残余应力测量。提出了一种基于双全站仪的位姿标定方案来实现样品台的以上功能,采用双全站仪测量系统和便携式激光扫描臂系统对各个坐标系进行标定。分别设计了样品坐标系、四轴样品台坐标系、中子谱仪衍射坐标系和全站仪坐标系的标定方案,并精确地设计了基于基准球的标定方案,由刚体变换法求得样品坐标系和全站仪坐标系之间的位姿转换矩阵,对样品上待测量点进行运动求解得到样品台的运动指令,并进行了实验验证。实验结果表明该方案能实现待测量点精确移动到衍射点,使待测量矢量与Q散射矢量对齐。
The neutron spectrometer sample stage performs the functions of accurately moving the point to be measured on the sample to the diffraction point and aligning the vector to be measured with the Q scattering vector, thereby performing residual stress measurement. A position calibration scheme based on dual total station is proposed to realize the above functions of the sample stage. The coordinate system is calibrated by the dual total station measurement system and the portable laser scanning arm system. The calibration schemes of the sample coordinate system, the four-axis sample stage coordinate system, the neutron spectrometer diffraction coordinate system and the total station coordinate system were designed, and the calibration scheme based on the reference sphere was designed accurately. The pose transformation matrix between the sample coordinate system and the total station coordinate system was obtained by the rigid body transformation method. The point to be measured on the sample was solved by the motion, and the experimental verification was carried out. The results show that the scheme can accurately move the point to be measured to the diffraction point, and align the vector to be measured with the Q scattering vector.
作者
李群明
韩志强
张绪烨
LI Qun-ming;HAN Zhi-qiang;ZHANG Xu-ye(College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;Light AAoy Research Institute,Central South University,Changsha 410083,China;State Key Laboratoiy of High Performance Complex Manufacturing,Central South University,Changsha 410083,China)
出处
《测控技术》
2019年第5期82-87,共6页
Measurement & Control Technology
基金
国家自然科学基金(51327902)
关键词
中子谱仪样品台
双全站仪测量系统
样品台位姿标定
基准球
neutron spectrometer sample stage
dual total station measurement system
sample stage posture calibration
benchmark ball
