Method and apparatus for calculating azimuth
AssigneeMagnaChip Semiconductor, Ltd.
InventorsDong Ho KIM, Ki Seok CHO
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Abstract
A method and an apparatus for calculating azimuth, and a method and an apparatus for determining an offset from geomagnetic field are provided. An apparatus for calculating azimuth includes a magnetic sensor configured to sense magnetic field, a data selecting unit configured to select offset data items, an offset calculating unit configured to calculate an offset by a geometrical method that uses the selected offset data items, and an azimuth calculating unit configured to calculate an azimuth by using the calculated offset.
Claims21
An azimuth calculating apparatus comprising:
- a magnetic sensor configured to sense magnetic field;
- a data selecting unit configured to select offset data items;
- an offset calculating unit configured to calculate an offset by a geometrical method that uses the selected offset data items;
- and
- an azimuth calculating unit configured to calculate an azimuth by using the calculated offset.
An azimuth calculating method comprising:
- selecting offset data in response to output data not corresponding to geomagnetic field;
- calculating an offset by using the selected offset data, determining whether or not the offset is within a range of variation in the offset, and applying the offset in response to the offset being within a range of a preset reference value and not applying the offset in response to the offset being outside the range of the reference value;
- and
- calculating an azimuth by using the calculated offset.
A method of determining an offset from geomagnetic field, the method comprising:
- measuring magnetic field with a magnetic sensor;
- selecting offset data items for calculating an offset;
- and
- calculating the offset by applying a geometric method to the selected offset data item.
Dependencies are inferred from the claim text.