三坐标测量机测头半径补偿实用算法

孙科 田怀文
西南交通大学机械工程学院,四川成都610031
摘　要:针对三坐标测量机表面数据化测量过程，本文给出一种实用的测头半径补偿算法。提出了采用两次细化测量点的策略，首先沿测量线进行测量点的插值细化，然后在测量线（截面）之间再次进行插值细化。在此基础上．对整个被测表面上各细化点，利用插值求导的方法求出其横向和纵向切向量，然后对切向量叉积求得各细化点的法向量．最后进行测头半径补偿计算。[著者文摘]

A measure of probe radius compensation for CMMSUN Ke, TIAN Huai-wen School of Mechanical Engineering, SouthWest JiaoTong University, Chengdu 610031, ChinaAbstract:A practical probe radius compensation is described in this paper for CMM measurements of the surface data. Propose a strategy that refine the measureing points two times, interpolate of the measureing points along the measureing line, then interpolate of the cross-sections. After this, derive the horizontal and vertical shear vector of the refineing points using methods of interpolation and derivation, and then cross-product the two shear vectors to obtain the law vector of each refineing points, and compensate the probe radius in the end.[著者文摘]

Key words:measurement; interpolate; refineing cross-section; radius compensation