公开(公告)号：US4804911A

公开(公告)日：1989-02-14

申请号：US055717

申请日：1987-05-29

申请人： Hidetoshi Saito ,  Masahiro Kume ,  Sakae Morita

发明人： Hidetoshi Saito ,  Masahiro Kume ,  Sakae Morita

IPC分类号： G01P1/02 ,  G01P3/488 ,  G01P3/42

CPC分类号： G01P3/488 ,  G01P1/026

摘要： An electromagnetic power generating type rotation sensor has a magnetic pole which is divided into an inner magnetic pole piece and an outer magnetic pole piece (3a, 13a) located in a position close to an outer peripheral part or a side part of a magnetic rotator. The inner magnetic pole piece (3b, 13b) is located adjacent to the outer magnetic pole piece but inside the sensor so as not to be exposed to the external environment.