| 摘要 |
A light source in the form of a laser beam is scanned successively across the surface of a web of moving material and the intensity of the beam, either reflected, transmitted, or scattered, is detected by a receiver which provides an indication of flaws which occur on the surface. For many applications the web of material is later divided into strips or segments for ultimate use, or it is otherwise desirable to determine on what segments of the web the flaws occur. In accordance with the present invention, an electronic data router is provided which is manually set by switches to locate the demarcation lines between segments of the material to divide the material into discrete strips for flaw indication purposes. Scan position information is fed to preset counters set by the aforesaid switches which provide outputs at the desired demarcation lines to divide the material as desired. Flaws passed by discriminators are fed to gates which are enabled by the data router for predetermined intervals corresponding to predetermined lines forming the strips on the material. By using a plurality of discriminators and gates with the same scanner, receiver and data router, a variety of different types of flaws may be sorted in accordance with their occurrence on predetermined segments of the web of material being examined.
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