| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for simply measuring the anisotropy (nonspherical symmetry) due to crystalline aggregate structure and phase ununiformity generated during manufacture and an increase in dislocation density accompanying fatigue damage generated during use in a ball having a ferromagnetic material. <P>SOLUTION: An object to be measured made of a ferromagnetic material is uniformly rotated in a magnetic field and magnetic characteristics of the ferromagnetic material is evaluated by measuring magnetic field fluctuation induced by rotation of the object to be measured using a magnetic sensor disposed in the vicinity of the object to be measured. <P>COPYRIGHT: (C)2013,JPO&INPIT |
