Torque sensing apparatus
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United States of America Patent
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Issued Date -
Sep 3, 2009
app pub date -
May 30, 2006
filing date -
May 27, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
There is described an apparatus for providing rotary displacement information indicative of the torque applied to a torsion bar which is rotatable relative to a housing, in which the electromagnetic coupling between a transmit aerial fixed relative to the housing and a receive aerial fixed relative to the housing varies in dependence upon first and second resonators fixed to the torsion bar at spaced axial positions. The first and second resonators have respective different resonant frequencies to enable the signal coupled between the transmit aerial and the receive aerial via the first resonator to be distinguished from the signal coupled between the transmit aerial and the receive aerial via the second resonator.
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