钢球缺陷检测机构的逆向运动特性研究

Research on Reverse Movement Characteristics of Defective Detection Mechanism for Steel Balls

为了研究钢球在检测过程中的运动形式及特点,根据AVIKO缺陷自动检测设备的工作原理设计并搭建了钢球展开机构物理观测平台;利用逆向动态分析的研究方法,通过高速摄像机追踪被测钢球表面标记点的运动轨迹;分析了工程中两类螺旋线的几何特点,并结合检测探头相对于钢球的运动形式进行研究.结果表明:钢球在展开轮的作用下做空间等弧长螺旋线运动,保证了钢球的全表面展开;同时检测探头相对钢球以均匀子午线形式进行扫描,实现球体全表面且无重复检测,为展开轮的结构设计提供理论依据.

In order to analyze the form of motion and characteristics of steel ball in the process of detection,based on the operating principles of equipment AVKIO detecting the defects automatically and produced by Czech company,the physical observation platform of deployable structure for steel balls was designed and established.Taking advantage of research method of inverse dynamic analysis,the high-speed camera was used to observe the movement trajectory of marker on steel ball surface.Then the geometric features of two types of spiral was analyzed respectively,combining with the form of movement of detection probe relative to steel ball.The results indicate that under the action of unfolding wheel,the steel ball rotates in a way of space helix with equal length of arc to ensure the unfolding of whole surface of steel ball,meanwhile the detection probe scans the surface in a way of homogeneous meridians relative to steel ball,which can guarantee the whole-surface unfolding and no duplicate detection of sphere and provide theoretical basis for structure design of unfolding wheel.