| 摘要 |
PROBLEM TO BE SOLVED: To calculate an offset with a smaller amount of arithmetic operations than before.SOLUTION: As to three-axis magnetic detection data sequentially acquired as data points in a three-axis coordinate system, an offset calculation unit 30 moves data points P1-P7 uniformly in parallel so that a reference data point P7 discretionarily chosen from, for example, data points P1-P7 matches an origin O, and thereby derives virtual data points P1'-P6'. Next, a virtual offset point C' in which the distance between a curved plane H1 passing through the origin O and the virtual data points P1'-P6' become minimum is calculated. Then, the virtual offset point C' is moved in parallel so that said parallel movement is reversed, whereby the offset value C of magnetic detection data is calculated.SELECTED DRAWING: Figure 2 |
