Patent ID: 9523576
Filing Date: 2016-12-20
CPC Classification: G01C,G01P,G01R,H03M

Claim Text:
1. A method for calculating values based on magnetic field information from a magnetic sensor in a sensing unit containing the magnetic sensor and at least one other sensing modality capable of providing a direct or derivative measure of change in orientation, the method comprising: sampling a magnetic field via the magnetic sensor at a plurality of points in time at a sample rate; sampling the at least one other sensing modality capable of providing a direct or derivative measure of change in orientation of the sensor unit at each of the plurality of points in time; rotating to a common time instant one or more of the plurality of magnetic field samples collected within a time interval using the orientation of the sensing unit at each of the plurality of points in time, estimated by means of the other sensing modality, in order to eliminate variations between magnetic samples due to changes in orientation of the sensor unit within such time interval; using the magnetic samples corrected for the sensor rotation in such interval to calculate magnetic field related information specific to the given time interval; and communicating to a receiver the magnetic field related information at an average rate lower than the sample rate.