Patent ID: 7548827
Filing Date: 2009-06-16
Classification: G01C

Abstract:
1. An apparatus for processing magnetic data to update an offset value of the magnetic data, the apparatus comprising: an input part that successively inputs magnetic data from a magnetic sensor; a first generation part that stores samples of the magnetic data in accordance with a first sampling rule, and generates first offset update data based on the stored samples of the magnetic data when a distribution of the stored samples of the magnetic data indicates a first feature; a second generation part that stores samples of the magnetic data in accordance with a second sampling rule, and generates second offset update data based on the stored samples of the magnetic data when a distribution of the stored samples of the magnetic data indicates a second feature; and an update part that updates an offset value of the magnetic data based on the first offset update data when the first offset update data is generated, and that updates the offset value of the magnetic data based on the second offset update data when the second offset update data is generated.