Sensor system for measuring displacements
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United States of America Patent
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Feb 27, 2001
Grant Date -
N/A
app pub date -
Apr 9, 1998
filing date -
Sep 19, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sensor system for measuring displacement includes a first member having a primary coil and a pair of secondary coils wound around a longitudinal axis thereof. The secondary coils have a periodically varying winding density distribution. The winding density distribution of one secondary coil is shifted relative to the winding density distribution of the other secondary coil. A second member positioned adjacent the first member modifies an electromagnetic field produced by the primary coil. In response to the modified electromagnetic field, the first and secondary coils produce first and second signals having amplitudes that vary periodically in response to relative movement between the first member and the second member.
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