发明申请
- 专利标题: CAPACITANCE-TYPE ENCODER
- 专利标题(中): 电容式编码器
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申请号: US12566798申请日: 2009-09-25
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公开(公告)号: US20100148801A1公开(公告)日: 2010-06-17
- 发明人: Hiroyuki UCHIDA , Mitsuyuki Taniguchi , Shunichi Odaka , Isao Kariya , Hidetoshi Mitsui
- 申请人: Hiroyuki UCHIDA , Mitsuyuki Taniguchi , Shunichi Odaka , Isao Kariya , Hidetoshi Mitsui
- 申请人地址: JP Minamitsuru-gun
- 专利权人: FANUC LTD
- 当前专利权人: FANUC LTD
- 当前专利权人地址: JP Minamitsuru-gun
- 优先权: JP2008-317756 20081212
- 主分类号: G01R27/26
- IPC分类号: G01R27/26
摘要:
A capacitance-type encoder capable of obtaining position data of a movable element with low power-consumption. The capacitance-type encoder comprises a stator, a movable element arranged to confront the stator, an excitation device and a signal processing device. The stator has at least three excitation-electrode sets electrically independent from each other, each set constituted of excitation electrodes arranged cyclically and electrically connected with each other so that a predetermined number of excitation-electrode groups are formed. The movable element has connection electrodes having the same number as the excitation-electrode groups. The excitation device applies excitation signals to the excitation-electrode sets periodically in a predetermined sequence. The signal processing device determines which one of divided regions of one cycle of arrangement of the excitation electrodes the movable element is positioned in based on a combination pattern of detection signals generated in the connection electrodes.
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