| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for precisely measuring a magnetic field in three-axis directions. SOLUTION: A three-axis sensor 14 having, mounted thereon, a detection sensor 12 capable of independently measuring a magnetic field in the three-axis directions orthogonal with each other, is moved straight along a reference line 24 connecting a pair of reference points 22. A first fixing point 30 and a second fixing point 32 are set on a cross straight line 25 with the reference line 24 therebetween, the cross straight line 25 being orthogonal to the reference line 24. The magnetic field generated by magnet pieces 28 supported on the fixing points 30, 32 is measured. Zero cross points 44 of magnetic field measurement values in the direction of the reference line 24 are compared with each other. When they are not coincident with each other, a correction coefficient 46 for correcting the magnetic field measurement values of the three-axis sensor 14 in the direction of the reference line 24 and the direction of the cross straight line 25 is selected. The correction coefficient 46 in which the zero cross points 44 are coincident with each other is set as the correction coefficient 46 for obtaining the magnetic field measurement values in the direction of the reference line 24 and the direction of the cross straight line 25. This device includes a correction coefficient computing means that performs the above processes for setting the correction coefficient 46. COPYRIGHT: (C)2009,JPO&INPIT
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