METHOD FOR MEASURING QUALITY OF BANDLIKE BODY METHOD FOR SUPPRESSING CAMBER INSTRUMENT FOR MEASURING QUALITY OF BANDLIKE BODY ROLLING MACHINE AND TRIMING DEVICE

摘要

A bandlike body being conveyed by a roller is imaged by e.g. a television camera. The distances from positions along an edge of the imaged bandlike body to a reference line provided in the longitudinal direction of the bandlike body are measured, the camber and meander of the bandlike body are determined from the distance of the same position, and the width of the bandlike body is determined from the distances of a pair of positions along the same line in the lateral direction of the bandlike body. A defect, if any, on the surface of the bandlike body is detected on the basis of the luminance of a pixel in the image. A chipping, if any, along the edges is detected on the basis of the distances. The rolling machine and trimming device of the bandlike body are subjected to feedfoward control on the basis of the camber, meander and width.