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특허 상세정보

Method and apparatus for a web edge tracking flaw detection system

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G01N-021/01   
미국특허분류(USC) 356/431 ; 250/563 ; 250/572 ; 356/237
출원번호 US-0016003 (1979-02-26)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 14  인용 특허 : 1
초록

A web of moving material is successively scanned by a light source, such as a laser beam, and changes of intensity of the transmitted, reflected or scattered light from the material is detected to provide an indication for discerning flaws in the web. A once per scan line digital signal from the scanner controls a voltage controlled oscillator connected in a phased locked loop which is used for controlling the generation of a precision ramp analog voltage that follows the angular scan position of the light source on the material. The light signal from th...

대표
청구항

A method of tracking the edges of a moving web of material in a light scanning, flaw detection system, said system having a light source which is successively scanned over said moving web and a receiver for detecting light reflected, transmitted or scattered by said moving web, comprising the steps of: (a) generating a digital reference pulse which is synchronized to occur at a predetermined angular position during each line scanned on the web of material being examined, (b) generating a precision analog ramp voltage synchronized with said digital refere...

이 특허를 인용한 특허 피인용횟수: 14

  1. Zoeller Leon R. (Hamlin NY). Control means for web scanning apparatus. USP1990044914285.
  2. Masaharu Okafuji (Dosho JPX) Tatsuo Takeoka (Dosho JPX) Nagayoshi Ichinose (Dosho JPX) Junichi Abe (Ohaza-Kamifujisawa JPX) Mitsuo Miyano (Ohaza-Kamifujisawa JPX) Kenji Tanaka (Ohaza-Kamifujisawa JPX. Discriminating type flaw detector for light-transmitting plate materials. USP1990044914309.
  3. Means Orville D. ; LeClair Robert W. ; Furuno David S.. Filter inspection system. USP2000086104032.
  4. Beuther Paul D. (Neenah WI). Method for controlling basis weight in the production of stretchable webs. USP1993125269883.
  5. Ohmer, Herve. Method for mapping geometrical features with opto-electronic arrays. USP2010077755770.
  6. Jerome Emonot FR. Process and apparatus for fault detection in a liquid sheet and curtain coating process. USP2002076426793.
  7. Foldvari Tibor L. (Cheshire CT) Boucher Donald R. (Meriden CT) Flanagan ; III Eugene L. (Manhasset NY). Strip chart recorder and medium status. USP1985084533926.
  8. Kohno Michio (Tokyo JPX) Suzuki Akiyoshi (Tokyo JPX). Surface inspecting device for detecting the position of foreign matter on a substrate. USP1989054831274.
  9. Duffy Edward K. (West Lafayette IN). System and method for in-process detection of contamination in electrical conductor insulation. USP1988014719061.
  10. Salinger Jeremy A. (Southfield MI). System for measuring optical characteristics of curved surfaces. USP1991024989984.
  11. Buisker Raymond A. (Madison WI) Ziemann Erich T. (Middleton WI) Martyn James (Madison WI). Ultrasonic web edge detection method and apparatus. USP1993125274573.
  12. Kirby George J. ; Ewing Jon F. ; Borgeson Arthur B.. Visual inspection system of moving strip edges using cameras and a computer. USP2000046046764.
  13. Wilhelm, Justin W.. Web inspection calibration system and related methods. USP2013108553228.
  14. Schwitzky Volkmar Rolf,DEX. Web or sheet edge position measurement process and device. USP1999085932888.