FLUID CYLINDER
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United States of America Patent
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Issued Date -
Sep 22, 2016
app pub date -
Mar 18, 2016
filing date -
Mar 18, 2016
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Abstract
A fluid cylinder including a piston rod that is guided in a cylinder casing and on which a marking is provided with equidistantly arranged marks. An optical sensor unit is directed toward the marking. The optical sensor includes two or more equidistantly arranged optoelectronic sensor elements, which are configured to generate a binary output signal. The axial spacing between the optoelectronic sensor elements and the marks is such that each binary output signal includes a predetermined phase shift relative to the chronologically following output signal. The marking has at least one reference mark for which an output signal exists in all of the optoelectronic sensor elements. The optical sensor unit includes an error detection that converts the binary output signals from the optoelectronic sensor elements into a Gray code.
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