Method for calibrating an angular position sensor
AssigneeHella GmbH & Co. KGaA
InventorsMarius Alexandru Constantin, Philipp Molkenthin
Life of this patent
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Abstract
The invention relates to a method for calibrating an angular position sensor, e.g. a contactless inductive position sensor or a Hall sensor, arranged at an output shaft of an actuator. The actuator may be provided for a vehicle application, e. g. for engine control, steering control, cooling control etc. Angular positions of the output shaft obtained by the angular position sensor and real angular positions of the output shaft calculated using angular positions of a motor shaft are compared.
Claims13
A method for calibrating an angular position sensor arranged at an output shaft of an actuator, wherein the actuator comprises an electrical motor configured to drive a motor shaft and to provide an incremental sensor using a motor back EMF signal, and a gear mechanism configured to provide a gear ratio between the motor shaft and the output shaft of the actuator, the method comprising:
- operating the angular position sensor to obtain angular positions of the output shaft;
- operating the electrical motor as the incremental sensor to determine angular positions and/or a number of revolutions of the motor shaft;
- calculating real angular positions of the output shaft using the angular positions and/or the number of revolutions of the motor shaft;
- comparing the angular positions of the output shaft obtained by the angular position sensor and the real angular positions of the output shaft calculated using the angular positions and/or the number of revolutions of the motor shaft;
- and
- calibrating the angular position sensor based on the comparing.
Dependencies are inferred from the claim text.