System and method for detecting flaws in continuous web materials
November 26, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3547800 3665419 3877821 3900265 Electro-optical method and apparatus for making identifications Digital matched filter and correlator using random access memory Method and apparatus for a rotary scanner flaw detection system Adaptive matched digital filter Method of detecting faults in moving webs of materials Method and apparatus for a web edge tracking flaw detection system InventorApplicationNo. 726529 filed on 04/24/1985US Classes:702/40, Radiant energy (e.g., X-ray, infrared, laser)356/238.1, Textile inspection356/430, For flaws or imperfections382/209, Template matching (e.g., specific devices that determine the best match)708/300FilteringExaminersPrimary: Lall, Parshotam S.Assistant: Trans, V. N. Attorney, Agent or FirmForeign Patent References
International ClassG01N 021/88AbstractA method and apparatus for detecting flaws in continuous web material illuminated by a light source and optically scanned to produce a digitalized electronic image of said material. The digitized image data representative of the continuous web material is stored in memory. The image data is also applied to a digital signal processor which identifies areas of the image which represent potential flawed areas of the continuous web material. A variety of spatial matched filters are employed to detect the flaws. Information concerning the locations of the potential flaws is transferred to a computer which analyzes in detail portions of the stored image in the vicinity of the identified areas. The processing performed in the computer verifies the presence of flaws in the material.Other References
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