Apparatus for sensing angular displacement between first and second rotating shafts including flux collectors
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United States of America Patent
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Dec 29, 2009
Grant Date -
Jan 29, 2009
app pub date -
Jul 23, 2007
filing date -
Jul 23, 2007
priority date (Note) -
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Abstract
An apparatus for measuring relative displacement between a first shaft and a second shaft includes first and second rotor assemblies. The first rotor assembly is coupled to the first shaft and is centered on an axis. The second rotor assembly is coupled to the second shaft. The second rotor assembly has first and second stator plates. Each of the first and second stator plates includes an upper surface and a lower surface. The first and second stator plates include a plurality of teeth extending in a direction radial of the axis. The apparatus further includes at least one magnet having a magnetic field and disposed on the first rotor assembly. The apparatus includes a flux collector arrangement having first and second collectors positioned adjacent the first and second stator plates, respectively, forming a gap. A sensing device disposed within the gap senses a magnetic flux of the magnetic field.
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