发明申请
- 专利标题: Drive unit provided with position detecting device
- 专利标题(中): 驱动单元配有位置检测装置
-
申请号: US11342408申请日: 2006-01-30
-
公开(公告)号: US20060170418A1公开(公告)日: 2006-08-03
- 发明人: Yoshiaki Hata , Kazumi Sugitani , Ryuichi Yoshida , Shuichi Fujii , Hideaki Nakanishi , Takayuki Hoshino , Hirohisa Sueyoshi
- 申请人: Yoshiaki Hata , Kazumi Sugitani , Ryuichi Yoshida , Shuichi Fujii , Hideaki Nakanishi , Takayuki Hoshino , Hirohisa Sueyoshi
- 优先权: JP2005-024837 20050201
- 主分类号: G01B7/14
- IPC分类号: G01B7/14
摘要:
A drive unit in accordance with the present invention is provided with a magnetic field generating member generating a magnetic field, a magnetic field detecting device constituted by first, second and third magnetic field detecting elements detecting the magnetic field, and a piezoelectric actuator moving the magnetic field generating member. When executing a relative positioning between the magnetic field generating member and the magnetic field detecting device on the basis of a detection result by the magnetic field detecting device, a first positioning is executed on the basis of the detection result of the first and second magnetic field detecting elements in a predetermined region, and a second positioning is executed on the basis of the detection result of the third magnetic field detecting element at a predetermined point apart from the predetermined region, within a movable range in which the magnetic field generating member moves. In accordance with the structure, it is possible to position the movable body at a high precision, even in the case that a plurality of position detecting points of the movable body of the drive unit exist at a wide interval.
公开/授权文献
- US07315164B2 Drive unit provided with position detecting device 公开/授权日:2008-01-01