Sensor for detecting relative rotation between shafts
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United States of America Patent
Stats
-
Nov 19, 2002
Grant Date -
Jun 28, 2001
app pub date -
Feb 21, 2001
filing date -
Jun 21, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A rotation sensor (10) provided with a first rotor (11) fixed to a predetermined position in the axial direction of the shaft, a second rotor (12) fixed to the shaft (5) adjoining the first rotor, and a magnetic material core (13) having a resonance coil (13c) arranged around the first rotor and forming a magnetic circuit working with the first rotor. The first rotor (11) is formed by a magnetic material comprised of an insulator, an irregular magnetic field is formed with the magnetic material core, and the second rotor (12) is provided with a conductor cutting across areas of different intensities of the irregular magnetic field in accordance with the difference of the angle of rotation when a difference in the angle of relative rotation occurs at a shaft position where the first rotor is fixed and a shaft position where the second rotor is fixed.
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