Patent ID: 8299781

Claim:
A radial position sensor comprising: a rotatable element configured to rotate about an axis of rotation; a non-rotating emitting element configured to provide a plurality of electromagnetic fields; and a non-rotating receiving element configured to receive the plurality of electromagnetic fields; the rotatable element disposed in juxtaposition to the non-rotating emitting element and to the non-rotating signal receiving element, the plurality of electromagnetic fields produced by the non-rotating emitting element being electromagnetically coupled to the non-rotating receiving element through the rotatable element, the electromagnetic coupling of the plurality of electromagnetic fields between the non-rotating emitting element and the non-rotating receiving element varying when the axis of rotation of the rotatable element is radially displaced from a first position to a second position, wherein the non-rotating receiving element produces an output signal in response to exposure to the plurality of electromagnetic fields, wherein an amplitude of the output signal is proportional only to a magnitude of displacement of the axis of rotation from the first position to the second position, wherein a phase of the output signal is proportional only to an angle of displacement of the axis of rotation from the first position to the second position.