Patent ID: 9482510
Filing Date: 2016-11-01
CPC Classification: G01B,G11B

Claim Text:
1. A device comprising: a first plurality of electrodes, wherein each electrode of the first plurality of electrodes is configured to measure an electric field associated with a position of a rotating object; a second plurality of electrodes, wherein the second plurality of electrodes is configured to measure a signal associated with ambient noise, wherein the first plurality of electrodes forms a first ring structure and the second plurality of electrodes forms a second ring structure, wherein a diameter associated with the second ring structure is greater than a diameter of the first ring structure; and a sensing circuitry configured to receive signals from the first plurality of electrodes and the second plurality of electrodes, wherein the sensing circuitry is configured to determine displacement associated with the rotating object, and wherein the sensing circuitry is further configured to determine the ambient noise based on the signal from the second plurality of electrodes.