Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2006-05-30
2006-05-30
Ledynh, Bot (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S207250
Reexamination Certificate
active
07053602
ABSTRACT:
A rotation sensor includes a rotor rotatable together with an automotive steering shaft, a conductive band formed on the rotor, a magnetic coil/core unit fixed near the rotor, the unit having a core body and an exciting coil, and a rotation angle detection circuit electrically connected to the coil. The width of the band gradually increases along a half-circumference of the rotor and then gradually decreases along the remaining half-circumference of the rotor, as viewed in the rotating direction of the rotor. The detection circuit applies an alternating signal to the coil. As the rotor is rotated with the alternating signal applied to the coil, the band causes the impedance of the coil to change in accordance with the rotation angle of the rotor, and based on the impedance change, the detection circuit detects the rotation angle of the rotor, that is, the steering shaft.
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English translation of JP 2002-83535 (filing date Mar. 25, 2002) pp. 1-19.
Abe Fumihiko
Jin Dongzhi
Aurora Reena
Cohen & Pontani, Lieberman & Pavane
Ledynh Bot
The Furukawa Electric Co., Limited
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