公开(公告)号：US4401893A

公开(公告)日：1983-08-30

申请号：US288010

申请日：1981-07-29

申请人： Andre Dehuysser

发明人： Andre Dehuysser

IPC分类号： G01N21/896 ,  G01N21/32

CPC分类号： G01N21/896

摘要： An automatic optical inspection of a moving web of glass for defects is provided by transversely scanning a moving web of glass with a light source which is internally reflected within the glass and travels towards the edge of the glass when the scanning light source strikes defects within the web. The light leaving the edges of the glass as a result of internal reflection is captured on opposite edges of the glass web. The captured light is detected and converted to electrical signals which are utilized to determine whether defects are present in the glass web in accordance with the characteristics of the electrical signals so generated. An apparatus is provided for the inspection method which includes edge detectors having a mouthlike construction fitting over the edges of the glass web and collecting internally reflected radiation from the edges of the web and applying it to photomultiplier tubes which are cooled. The mouthlike structure is made completely light tight by having brushes mounted thereon which do not scratch or alter the glass product surface. The edge detectors are enslaved mechanically so as to follow the movements of the glass web so that the system will not disturb the manufacturing process. Since internal reflection is the detection mechanism, and dirt on the surface does not scatter light internally, this method differentiates between dirt, the detection of which is not desired, and defects in optical contact with and under the surface of the glass which are desired to be detected.

摘要翻译： 通过用玻璃内部反射的光源横向扫描移动的玻璃网，通过扫描光源在玻璃内部反射的玻璃内部反射并向玻璃的边缘移动时提供用于缺陷的玻璃的移动网状物的自动光学检查。 网络 作为内部反射的结果离开玻璃边缘的光被捕获在玻璃纤维网的相对边缘上。 捕获的光被检测并转换成电信号，该信号用于根据如此生成的电信号的特性来确定玻璃纤维网中是否存在缺陷。 提供了一种用于检查方法的装置，其包括边缘检测器，其边缘检测器具有口状结构，并且装配在玻璃纤维网的边缘上，并收集来自网状物的边缘的内部反射的辐射并将其施加到被冷却的光电倍增管。 通过安装在其上的不会刮擦或改变玻璃制品表面的刷子使得口状结构完全不透光。 边缘检测器机械地被奴役，以便跟随玻璃纤维网的移动，使得系统不会干扰制造过程。 由于内部反射是检测机构，并且表面上的污垢不会内部散射光，因此该方法区分了不期望的检测和不希望的玻璃的光学接触和表面下的缺陷。 被检测。