三坐标测量机测量路径的曲率连续自适应规划

Continuous curvature adaptive planning of the measuring path for CMM

该文介绍了广泛用于逆向工程中的三坐标测量机的测量原理、曲面测量规划和测量路径优化的方法。常用的圆弧插值法和多项式法由于测量规划简单、控制方便而应用广泛,但是在用它们对自由曲面进行自适应测量时,需测点数会随着自由曲面的复杂程度的提高而显著增加,精确程度和效率也随之大幅度降低。基于自由曲面应保持多阶连续的几何特性,该文提出了曲率连续自适应法来测量具有自由曲面特征的物体。规划的测量路径的准确性和测量效率得到了提高,保证了测量系统的可靠性和安全性,最后用实例证实了该法的有效性和经济价值。

The coordinate measuring machine working principle widely used in reverse engineering with several methods used for planning and route optimization when measuring surfaces.The circle interpolation method and the polynomial method are widely used because they are simple and easily controlled.During adaptive measurements of a sculptured surface,the circle interpolation method and the polynomial method need more data points with the precision rapidly deteriorating as the surface complicity is increases.The present adaptive continuous curvature method assumes that the sculptured surface has n-order geometric continuity to measure object with sculptured surfaces.The system improves the precision and efficiency of the planned trajectory,and the reliability of the results.