Method and device for detecting direction of member having outer periphery formed in vertically asymmetrical shape
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United States of America Patent
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Mar 17, 2009
Grant Date -
Oct 16, 2008
app pub date -
Nov 26, 2004
filing date -
Jan 26, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and a device for identifying an upper surface and a lower surface of a component having asymmetric upper and lower outer shapes are provided. In particular, a method and a device for identifying orientation of an item that hardly allows visual identification of the upper and lower surface. A disk-like, cylindrical, or annular component having asymmetric upper and lower outer shapes is placed on a reference surface having a reference block, an outer peripheral part of the component on the reference surface is brought into contact with the reference block, and identification of the upper and lower surface of the component is achieved in an inline system based on a gap created between the outer peripheral part of the component and the reference block, using a light source lighting device and a detection camera arranged across the reference block.
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