Method of detection and alignment of round workpieces
Xiaojun Liu · Modern Electronics Technique · 2012
Rapid and accurate alignment of workpiece has a wide application prospect in the field of industrial automation.An alignment system applied to the circular workpieces was built based on the image processing technology.A study on the detection and alignment technologies for the round workpieces was carried out.The image of a round workpiece is captured by an image acquisition card and treated by median filtering.The edge of the image is extracted with Sobel.The improved Hough round transform tecnology is adopted for center position,and then the offset from the center of workpiece to the center of the field is deduced,and the stepping motor drives at x/y direction according to the offset.Compared to the tranditional alignment method,this system greatly reduces the time required for image processing.The rapid detection and alignment of the circular workpieces were realized.