Method and apparatus for the safe detection of material defects in transparent materials

摘要

Method and apparatus for the safe detection of material defects in a continuously produced strip of transparent material by means of the testing of an extending transversely to the direction of conveyance, in the transmitted light or reflected light observed, strip of a strip of this material, characterized in that it has the following features:a) continuous illumination in the transmitted light or reflected light of the strip of transparent material with a transversely to the band arranged line-shaped illumination means (6) with a constant luminous flux and an adjacent, also arranged transversely with respect to the strip illumination means (5) with an oscillating luminous flux, as well as a supplemental bright field - illumination (8) and an additional dark field - illumination (2), wherein the linear luminous means (6) on the surface has a line grating (7),b) detecting a continuous, extending over the width of the strip of transparent material by means of the area extending line cameras (9, 1), which are arranged an - portal,c) monitoring the functions of the lighting means (5, 6, 2, 8) and the cameras (9, 1),d) an operating program, or a learning program for the detection and classification and does not contain defects occurring, as well as a learning program which makes it possible as an error detected points or regions in the transparent material which have a certain degree of constancy not as an individual error values, but these points or regions in a learning process, so to speak, be regarded as unimportant.