Band detection sensor and detection method therefor
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United States of America Patent
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Apr 21, 2015
Grant Date -
Jun 19, 2014
app pub date -
Feb 12, 2014
filing date -
Nov 24, 2011
priority date (Note) -
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Abstract
A band detection sensor includes LEDs configured to radiate detection light onto one side of a web, photodiodes configured to receive the detection light reflected by the web and output a detection signal corresponding to the detection light, and a discrimination section configured to discriminate bands on the web on the basis of the detection signal from the photodiodes, wherein the discrimination section includes a rise discriminating criterion indicating a rate of rise of the detection signal and generates a band signal indicative of the presence of a band when change of the detection signal fulfills the rise discriminating criterion.
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