Optical imaging system for fabric seam detection
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United States of America Patent
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Sep 22, 1992
Grant Date -
N/A
app pub date -
Mar 13, 1991
filing date -
Mar 13, 1991
priority date (Note) -
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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.
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