Patent ID: 9279655
Filing Date: 2016-03-08
CPC Classification: G01B

Claim Text:
1. A non-contact test method for measuring an air gap between a rotating surface and a stationary element, comprising: affixing a capacitance sensor to a stationary element with a means for attaching, wherein the capacitance sensor is arranged between the rotating surface and the stationary element, wherein the rotating surface is a surface of a slip ring; verifying a system accuracy prior to capturing the air gap measurement; capturing an air gap measurement between the rotating surface and the stationary element with the capacitance sensor; increasing the air gap measurement by an amount equal to an offset, wherein the offset equals a thickness of the capacitance sensor plus a thickness of the means for attaching; correcting the increased air gap measurement with a piece wise linear created from a calibration curve; and displaying the corrected air gap measurement.