Inductive position sensor

Details Inductive position sensor Inductive position sensor

2011-03-22

2011-03-22

Pope, Daryl (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S545200, C340S545400, C340S565000, C340S572800

Reexamination Certificate

active

07911354

ABSTRACT:
A position sensor having a circular transmitter coil which generates electromagnetic radiation when excited by a source of alternating electrical energy. A receiver coil has a first loop wound in a first direction around a portion of the transmitter coil and a second loop wound in a second direction opposite from the first direction around a diametrically opposed portion of the transmitter coil. In addition the receiver coil includes a first compensating coil wound in the second direction inside the first portion of the transmitter coil as well as a second compensating coil wound in the first direction inside the second portion of the transmitter coil. The first and second loops and the first and second compensating coils of the receiver coil are electrically connected in series with each other. A movable coupler element varies the inductive coupling between the transmitter coil and the receiver coil as a function of the position of the coupler to thereby vary the electrical output signal from the receiver coil when excited by the transmitter coil.

REFERENCES:
patent: 6175232 (2001-01-01), De Coulon et al.
patent: 6384598 (2002-05-01), Hobein et al.
patent: 7292026 (2007-11-01), Lee
patent: 2009/0079422 (2009-03-01), Lee
patent: 0909955 (1999-04-01), None
patent: 1225426 (2002-07-01), None
patent: WO-2005/098370 (2005-10-01), None
patent: WO-2006/106422 (2006-10-01), None

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