Position sensor having stacked flat coils

Details Position sensor having stacked flat coils Position sensor having stacked flat coils

2011-07-26

2011-07-26

Whittington, Kenneth J (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C324S207160

Reexamination Certificate

active

07986139

ABSTRACT:
A plurality of layers of flat coils are stacked and connected in series with each other to form a single coil pole, and the coil pole is energized by an A.C. signal. Magnetism-responsive member, provided to be opposed to the coil pole in a non-contact manner, is displaced relative to the coil pole, so that correspondency, to the coil section, of the magnetism-responsive member varies in response to variation in the relative position and thus impedance variation occurs in the coil pole. Position detection signal is provided on the basis of an output signal, responsive to the impedance variation, taken out from the coil pole.

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English translation of International Search Report issued in PCT/JP2006/312636, from which this National Phase application claims priority; mailing date of Aug. 1, 2006.

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