公开(公告)号：US09625539B2

公开(公告)日：2017-04-18

申请号：US14764085

申请日：2014-02-10

申请人： Nissan Motor Co., Ltd.

发明人： Koji Higaki ,  Kimio Nishimura ,  Masahiro Omata ,  Hideki Watanabe ,  Yasuhisa Koike ,  Takashi Sekikawa ,  Yasushi Matsushita ,  Akihisa Hori ,  Takumi Ohshima ,  Michito Kishi ,  Kiyoshi Hasegawa ,  Hiroaki Shibukawa ,  Kazuhiro Takaichi ,  Hideo Sakuyama ,  Yuhei Yamane ,  Yoshito Ozawa

IPC分类号： G01N27/74 ,  G01R33/12 ,  G01R33/10 ,  G01N27/90 ,  H01F41/02

CPC分类号： G01R33/12 ,  G01N27/9026 ,  G01R33/10 ,  H01F41/0253

摘要： A magnet evaluating device evaluates an evaluation magnet by passing the evaluation magnet, which is formed by connecting a plurality of magnetic sections with insulating material in between, and a master magnet of the same form through an alternating magnetic field generated by an excitation coil, measuring the eddy current occurring in the magnetic section as voltage or current occurring in a detection coil and comparing the measured value for the evaluation magnet and the measured value for the master magnet.