CA2062991A1 - Optical imaging system for fabric seam detection - Google Patents

Optical imaging system for fabric seam detection

Info

Publication number
CA2062991A1
CA2062991A1 CA 2062991 CA2062991A CA2062991A1 CA 2062991 A1 CA2062991 A1 CA 2062991A1 CA 2062991 CA2062991 CA 2062991 CA 2062991 A CA2062991 A CA 2062991A CA 2062991 A1 CA2062991 A1 CA 2062991A1
Authority
CA
Canada
Prior art keywords
imaging system
optical imaging
seam
periodic pattern
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2062991
Other languages
French (fr)
Other versions
CA2062991C (en
Inventor
Douglas L. Whitman
Adel K. Sarrafzadeh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
American Research Corp of Virginia
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2062991A1 publication Critical patent/CA2062991A1/en
Application granted granted Critical
Publication of CA2062991C publication Critical patent/CA2062991C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Treatment Of Fiber Materials (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

A non-contacting optical imaging system for seam or other periodic pattern detection for a web of material such as a strip of fabric is disclosed in which a line scan camera is used to capture a seam or other periodic pattern image and the electrical output from the camera is converted to an alternating current signal and then to a direct current signal which is proportional to the presence or absence of a seam other periodic pattern. The DC signal is integrated and then compared to a preset reference value to produce a signal for driving an alarm, display or machine control devices.
CA 2062991 1991-03-13 1992-03-13 Optical imaging system for fabric seam detection Expired - Fee Related CA2062991C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US68861491A 1991-03-13 1991-03-13
US07/688,614 1991-03-13

Publications (2)

Publication Number Publication Date
CA2062991A1 true CA2062991A1 (en) 1992-09-14
CA2062991C CA2062991C (en) 1998-09-22

Family

ID=24765090

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2062991 Expired - Fee Related CA2062991C (en) 1991-03-13 1992-03-13 Optical imaging system for fabric seam detection

Country Status (1)

Country Link
CA (1) CA2062991C (en)

Also Published As

Publication number Publication date
CA2062991C (en) 1998-09-22

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Legal Events

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