Electronic compass and method of controlling an electronic compass using independent calibration and compass heading modules
AssigneeSiemens VDO Automotive Corporation
InventorsPhilippe Fillatreau, Francois-Xavier Bernard
Life of this patent
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Abstract
A method for controlling an electronic compass includes receiving raw magnetic field data into a calibration module and determining a calibration output based upon the raw magnetic field data. The raw magnetic field data is also received into a compass heading module for determining compass heading outputs based upon the raw magnetic field data. The calibration module filters the raw magnetic field data and validates the calibration outputs independently from output data filtering and results validation in the compass heading module.
Claims15
A method of controlling an electronic compass comprising:
- selectively filtering raw magnetic field data within a calibration module to produce first filtered data;
- selectively filtering the raw magnetic field data within a compass heading module to produce second filtered data such that the first filtered data and the second filtered data include at least one overlapping magnetic field data point and at least one different magnetic field data point;
- determining a calibration output based upon the first filtered data;
- determining a compass heading output based upon the second filtered data;
- and
- displaying a vehicle direction based upon the compass heading output.
An electronic compass assembly comprising:
- a calibration module operable to receive raw magnetic field, data and determine a calibration output based upon raw magnetic field data, wherein the calibration module includes a first filter module that is operable to receive the raw magnetic field data, produce first Filtered data based upon the raw magnetic field data, and determine a calibration output based upon the first filtered data;
- a compass heading module operable to receive the raw magnetic field data and determine compass heading outputs based upon the raw magnetic field data, wherein the compass heading module includes a second filter module that is operable to receive the raw magnetic field data, produce second filtered data based upon the raw magnetic field data, and determine the compass heading outputs based upon the second filtered data.
Dependencies are inferred from the claim text.