JIG FOR SETTING COORDINATE SYSTEM OF VISUAL SENSOR AND SETTING METHOD

摘要

A jig (J) has a large number of characteristic points (Pmn) which are disposed at known intervals at grid points of a grid corresponding the coordinate system of a vision sensor, and the characteristic points can be recognized by the sensor. Three or more, but not many, of characteristic points have additional characteristics so that they can be distinguished from the rest of characteristic points by the vision sensor, and the mode of their arrangement or the characteristic points themselves represent the origin and the axes of the coordinate system of the vision sensor. The jig (J) is disposed at a predetermined position and observation is effected through the vision sensor. The origin and axes of the coordinate system are recognized according to the mode of arrangement of the characteristic points or those points themselves, and data required for combining a camera coordinate system with the sensor coordinate system is obtained by using image data of the recognized characteristic points including those having the additional characteristics.