Calibration of a triaxial magnetic field sensor
AssigneeRobert Bosch GmbH
InventorsStefan Weiss, Julian Bartholomeyczik, Sergej Scheiermann
Life of this patent
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Abstract
A method for calibrating a triaxial magnetic field sensor includes steps for determining an offset of recorded measured values of the magnetic field sensor using a superposed signal and for determining the sensitivity of the magnetic field sensor along the first measuring axes. The determination of the sensitivity includes steps for determining the sensitivity of the magnetic field sensor along a first measuring axis and for determining the sensitivity of the magnetic field sensor along the other measuring axes based on the sensitivity of the first measuring axis and the determined offset.
Claims15
A method for calibrating a triaxial magnetic field sensor, comprising:
- determining, with a processor, an offset of recorded measured values of the magnetic field sensor using a superposed signal;
- and
- determining, with the processor, a sensitivity of the magnetic field sensor along measuring axes;
- wherein the determination of the sensitivity includes determining the sensitivity of the magnetic field sensor along a first measuring axis, and determining the sensitivity of the magnetic field sensor along the other measuring axes based on the sensitivity along the first measuring axis and the determined offset, and
- wherein the sensitivity along the other measuring axes is determined using a Newton iteration method.
A non-transitory computer-readable medium having a computer program, which is executable by a processor, comprising:
- a program code arrangement having program code for calibrating a triaxial magnetic field sensor, by performing the following:
- determining an offset of recorded measured values of the magnetic field sensor using a superposed signal;
- and
- determining a sensitivity of the magnetic field sensor along measuring axes, wherein the determination of the sensitivity includes determining the sensitivity of the magnetic field sensor along a first measuring axis, and determining the sensitivity of the magnetic field sensor along the other measuring axes based on the sensitivity along the first measuring axis and the determined offset, wherein the sensitivity along the other measuring axes is determined using a Newton iteration method.
A device for calibrating a triaxial magnetic field sensor, comprising:
- a processor for performing the following:
- determining an offset of measured values of the magnetic field sensor using a superposed signal;
- determining a sensitivity of the magnetic field sensor along a first measuring axis;
- and
- determining a sensitivity of the magnetic field sensor along other measuring axes based on the sensitivity along the first measuring axis and the determined offset, wherein the sensitivity along the other measuring axes is determined using a Newton iteration method.
Dependencies are inferred from the claim text.