Title:
位置検出装置
Document Type and Number:
Japanese Patent JP4922033
Kind Code:
B2
Abstract:
A position detecting devices includes a scale, a sensor, and a control section. The scale has a plurality of light emitting elements located at spacings along a direction in which a movable member is moved. Mounted on the member, the sensor detects light from at least one of the elements within a predetermined detection range longer than a largest one of the spacings, and outputs a light reception signal according to a position where the light is received within the range. Upon receipt of the signal, the control section retrieves from the storage section information on a located position of one of the light emitting elements that is being driven, and calculates a position of the member based on the retrieved information and the received signal.
Inventors:
Shinji Nagata
Kosuke Sakata
Shinichi Kageshita
Kosuke Sakata
Shinichi Kageshita
Application Number:
JP2007079339A
Publication Date:
April 25, 2012
Filing Date:
March 26, 2007
Export Citation:
Assignee:
Tatsumo Co., Ltd.
International Classes:
G01D5/36; G01D5/347
Domestic Patent References:
| JP3185312A | ||||
| JP63096502A | ||||
| JP62054120A | ||||
| JP2000230806A | ||||
| JP2047514A |
Attorney, Agent or Firm:
Kaede International Patent Office
Hisao Komori
Toshio Ozawa
Hisao Komori
Toshio Ozawa