Electromagnetic induction type position sensor

Details Electromagnetic induction type position sensor Electromagnetic induction type position sensor

2006-05-23

2006-05-23

Nguyen, Tuyen T (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

C324S207170

Reexamination Certificate

active

07049924

ABSTRACT:
An electromagnetic induction type position sensor comprises an AC magnetic flux generating device which generates AC magnetic flux substantially at a wavelength λ, and a plurality of coils which receives the AC magnetic flux to output electromagnetic induction voltages. Each coil includes a plurality of sinusoidal conductive patterns at a wavelength λ formed in each of an even number of layers laminated via insulating materials. The plurality of conductive patterns formed in a same layer is arranged with a space between them in an amplitude direction of the sinusoidal shape, and is formed at the same position as a plurality of conductive patterns formed in another adjacent layer, and its amplitude is in a reverse phase to that of the plurality of conductive patterns formed in the other adjacent layer. All the conductive patterns constituting the same coil are connected in series so that a direction of an electric current of these conductive patterns is opposite to that of the conductive patterns in reverse phases when viewed from the front of the layers.

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