以加工设备最大加工空间分层索引模型为基础 ,提出数控加工程序碰撞检测新方法 .该方法将三维物体间的碰撞问题 ,转化为判断平面内一点与一封闭轮廊曲线位置关系的问题 .由此 ,降低了碰撞检查的复杂程度 ,因而提高了碰撞检测的效率 .文中同时给出以微机为硬件基础的算法实例 Based on the layered indexing model of the maximum machining space of machining equipment, a new method of NC machining program collision detection is proposed, which transforms the collision problem between three-dimensional objects into the problem of determining the positional relationship between a point in a plane and the closed curve of a closed porch. This reduces the complexity of the collision check, thus improving the efficiency of collision detection.At the same time given the example of a computer-based hardware algorithm