| 摘要 |
An azimuth measuring device capable of performing calibration of a magnetic sensor without applying load to a user. When a point having output amplification values Sx, Sy, Sz after sensitivity correction as an x, y, and z component is arranged on a xyz coordinate system, an offset information calculation section (8) calculates the center coordinates of such a sphere whose surface is located in the vicinity of each point. The x component of the center coordinate of this sphere is calculated as the current offset Cx of the x- axis hall element HEx; the y component of the center coordinate of this sphere is calculated as the current offset Cy of the y-axis hall element HEy; and the z component of the center coordinate of this sphere is calculated as the current offset Cz of the z-axis hall element HEz. Thus, it is possible to perform calibration of the magnetic sensor without applying load to the user. ® KIPO & WIPO 2007
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