Patent ID: 7275015
Filing Date: 2007-09-25
Classification: G01B,G01D,G01P

Abstract:
1. A method for determining motion parameters of a conductive profiled surface relative to a sensor, with the sensor having a coil system comprising at least one coil, and comprising the steps of generating an electromagnetic alternating field from the coil system of the sensor, subjecting the field by reason of the feedback resulting from position changes between the surface and the sensor to a variation which can be sensed by the coil system, and deriving the position changes from the complex coupling impedance Z communicating the computed distance d to a user, and wherein the mathematical function serves as the al 2orithm, with the relative speed or rotational speed between the surface and the sensor being determined from the function and with L being the sum of the lengths of a tooth and a slot of the profiled surface, and T(F x ) the cycle period of the function