초록 ▼

The image of an edge (MK) of material in strip form, the width of which is to be monitored, is stored and shifted toward both sides parallel to the tolerance limits (TG1, TG2). The coordinates of the picture elements of the tolerance limit (TG1, TG2) are stored and compared with the coordinates of t

The image of an edge (MK) of material in strip form, the width of which is to be monitored, is stored and shifted toward both sides parallel to the tolerance limits (TG1, TG2). The coordinates of the picture elements of the tolerance limit (TG1, TG2) are stored and compared with the coordinates of the picture element of the respective actual edge (AK). If its picture elements lie on or outside of the tolerance limits (TG1, TG2), an indication signal is generated. The method is used in the manufacture of plate glass.

대표청구항 ▼

A method for monitoring the width of material in strip form, with an image evaluation device consisting of a television camera which generates analog signals corresponding to a picture of the edges of the material, a digitizing unit which converts the analog video signals into digital signals, and a

A method for monitoring the width of material in strip form, with an image evaluation device consisting of a television camera which generates analog signals corresponding to a picture of the edges of the material, a digitizing unit which converts the analog video signals into digital signals, and a memory for storing the digital signals comprising the steps of: shifting the picture of a sample edge in two opposite directions to define two tolerance limits; storing the tolerance limits; comparing the images of each of successive recorded actual edges of the material with the tolerance limits; and generating an indication signal indicative of the position of the actual edges with respect to the tolerance limits.