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특허 상세정보

Web or sheet edge position measurement process and device

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G01N-021/86   
미국특허분류(USC) 250/559.36 ; 250/559.12 ; 356/429
출원번호 US-0894368 (1997-08-22)
우선권정보 DE-0006467 (1995-02-24)
국제출원번호 PCT/DE96/00299 (1996-02-23)
§371/§102 date 19970822 (19970822)
국제공개번호 WO-9626417 (1996-08-29)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Jones, Tullar & Cooper, P.C.
인용정보 피인용 횟수 : 6  인용 특허 : 16
초록

The position of an edge of a web or sheet is measured using a photoelectric measuring device. Any edge anomalies will generate extreme edge position values. These extreme values are used together with other, more representative values, to determine an initial position of the web edge. These extreme values are then eliminated since they exceed a tolerance threshold. A revised determination of the edge location is made using the remaining position values.

대표
청구항

[ What is claimed is:] [1.] A method for measuring a position of an edge of a web by means of a photoelectric measuring device consisting of an illumination device and a photoelectric receiver, characterized in that at least three measured values of a position of an edge are determined, that an initial average value is determined using said at least three measured values of a position of an edge, that extreme values of the measured values of a position of an edge exceeding said initial average value and based on anomalies of the edge are removed from fur...

이 특허에 인용된 특허 (16)

  1. Curl, Barry J.. Apparatus for determining with high resolution the position of edges of a web. USP1985124559451.
  2. Klein Herrmann (Reichshof DEX) Pelweckyj Peter (Heusenstamm DEX) Menzel Ludwig (Olpe-Biggesee DEX). Apparatus for taking measurements for the evaluation of video camera images for tape edge regulation. USP1983014367487.
  3. Isherwood ; Jeffrey. Detecting lateral position of webs. USP1978084110627.
  4. Blaser Peter T. (Dielheim DEX). Device for detecting the edge location of an object. USP1991045006719.
  5. Bolza-Schnemann Claus A. (Wrzburg DEX). Edge location measuring head. USP1987074680806.
  6. Petrohilos Harry G. (Yellow Springs OH) Taylor Francis M. (Xenia OH). Light beam shape control in optical measuring apparatus. USP1977024007992.
  7. Merlen Monty M. (Stamford CT) Slaker Frank A. (Norwalk CT). Method and apparatus for a web edge tracking flaw detection system. USP1981014247204.
  8. Schaede Johannes Georg,DEX ; Schwitzky Volkmar Rolf,DEX. Method and apparatus for measuring a position of webs or sheets. USP1998035724150.
  9. Koiranen Jukka (JyvskylFIX) Pellinen Kari (Syntsalo FIX) Sarkkinen Olli (Jyvskyl FIX). Method and device for monitoring an edge of a moving web with a bar of radiation. USP1996025489784.
  10. Duran ; Jr. Michael J. (Lancaster PA). Motion tracking device. USP1987054662756.
  11. Nguyen Donald D. (Lawrenceville NJ). Portable edge crack detector for detecting size and shape of a crack and a portable edge detector. USP1995025389789.
  12. Toyofuku Takashi (Kanagawa JPX). Scan reading method including density measuring and edge detection. USP1993055214294.
  13. Kondo Ikuzo (Chita JPX) Makihara Tsutomu (Nagoya JPX). Sewing machine with a cloth-edge detector. USP1990054924790.
  14. Denoel Jean Denis,FRX ; Dumortier Andre,FRX. System for controlling a space vehicle by gating gas. USP1998065765367.
  15. Pahr Per O. (Lier NOX). System for integrated tape hole detection by detecting an edge of the tape and/or a pattern on the tape. USP1993075229620.
  16. McKaughan Stephen V. (Arlington MA) Nevers Gary F. (Lynn MA) Landry Joseph W. (Saugus MA) Fallon John P. (Andover MA) Adomaitis Paul R. (Trafford PA). Video web inspection system employing filtering and thresholding to determine surface anomalies. USP1994045301129.