Patent ID: 9638548
Date: 2017-05-02
CPC Classifications: G01D

Claim:
1. A sensor system comprising: a target wheel comprising a plurality of target elements; and a sensor comprising a magnetic field sensor element coupled to sensor circuitry, the magnetic field sensor element configured to sense rotation of the target wheel based on a varying magnetic field and provide a corresponding output signal comprising a maximum and a minimum for each of the plurality of target elements indicating any differences between the plurality of target elements, the sensor circuitry configured to, for each one of the plurality of target elements, use at least one maximum and at least one minimum related to the one of the plurality of target elements to predict an individual switching threshold for a subsequent instance of that one of the plurality of target elements, wherein the sensor circuitry is configured to use the maximum for the one of the plurality of target elements and a value determined from the minima for the plurality of target elements in at least one rotation to predict the individual switching threshold for at least the next instance of that one of the plurality of target elements.