Method for correcting an angle error of an absolute-angle sensor
AssigneeRobert Bosch GmbH
InventorsMichael Lehner, Andreas Pfender
Life of this patent
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Abstract
Method for correcting an angle error of an absolute-angle detector that detects the angular position of a first shaft whose rotary movement is linked to a second shaft. The angular position of second shaft is first detected during at least one complete revolution of first shaft; the corresponding angular position of first shaft is derived from this value; the corresponding output value of absolute-angle detector is compared to the corresponding angular position of first shaft, and the difference formed by this comparison is stored. The corresponding output value of absolute-angle detector is then corrected by the stored value.
Claims4
A method for correcting an angle error of an absolute-angle detector that detects an angular position of a first shaft having a rotary movement that is linked to a second shaft, comprising:
- initially detecting an angular position of the second shaft during at least one complete revolution of the first shaft;
- determining the angular position of the first shaft from the detected angular position of the second shaft;
- comparing a corresponding output value of the absolute-angle detector to the angular position of the first shaft;
- forming and storing a difference between the corresponding output value of the absolute-angle detector and the angular position of the first shaft;
- and
- correcting the corresponding output value of the absolute-angle detector in accordance with the stored difference;
- wherein the determining, comparing, forming and correcting steps are performed during normal operation of the absolute-angle detector.
Dependencies are inferred from the claim text.