【作者】 李春； 刘书桂；

【Author】 Li Chun Liu Shugui(State Key Laboratory of Precision Measuring Technology and Instrument,Tianjin University, Tianjin 300072, China)

【机构】 天津大学精密测试技术与仪器国家重点实验室；

【摘要】 在非均匀双三次B—样条函数的基础上,导出自由曲面任意点的法矢量通用算法,进而提出自由曲面测头半径补偿公式;为了更好的消除自由曲面测量中的定位误差,提出了应用单纯形法,对测量原始点进行坐标平移和旋转变换,从而较好的解决了曲面匹配问题。更多还原

【Abstract】 Based on non-uniform B-splines,a new current algorithm with normal vector of random free-form surface’s point is deduced,and more,a formula with probe compensation is proposed. We offer a arithmetic named simplex method in order to eliminating orientation error in the process of free-form surface measurement. It can settle surface matching well by shifting and rotating the measuring coordinate system.更多还原