- 专利标题: Electric potential sensor
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申请号: US11148277申请日: 2005-06-09
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公开(公告)号: US20060008284A1公开(公告)日: 2006-01-12
- 发明人: Takashi Ushijima , Yoshikatsu Ichimura , Atsushi Kandori , Yoshitaka Zaitsu
- 申请人: Takashi Ushijima , Yoshikatsu Ichimura , Atsushi Kandori , Yoshitaka Zaitsu
- 申请人地址: JP Tokyo
- 专利权人: CANON KABUSHIKI KAISHA
- 当前专利权人: CANON KABUSHIKI KAISHA
- 当前专利权人地址: JP Tokyo
- 优先权: JP177596/2004(PAT.) 20040615
- 主分类号: G03G15/00
- IPC分类号: G03G15/00
摘要:
An electric potential sensor includes a detecting electrode, a capacitor modulating unit for modulating a coupling capacitance between the detecting electrode and a measurement object by using an electrostatic force, and a shielding unit for electrically shielding the detecting electrode from electric fields due to the electrostatic force of the capacitor modulating unit. An electric potential of the measurement object is measured based on a change caused by the capacitor modulating unit in the amount of electrical charge induced in the detecting electrode. Entrance of lines of electric force due to the electrostatic force of the capacity modulating unit into the detecting electrode is prevented or reduced, so that an unfavorable mixture of driving noise into an output signal of the detecting electrode can be prevented or reduced.
公开/授权文献
- US07149442B2 Electric potential sensor 公开/授权日:2006-12-12