Title:
LINEAR ENCODER DEVICE AND REFERENCE POSITION DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2014/181843
Kind Code:
A1
Abstract:
A linear encoder device (60) is provided with: a synchronized signal generation unit (83) which, on the basis of a signal outputted by a first sensor (66) provided to face a linear scale (61), generates a periodic synchronized signal synchronized with a movement distance when the first sensor (66) has moved along the linear scale (61); a reference signal generation unit (82) which, on the basis of a signal outputted by a second sensor (67) provided together with the first sensor (66), generates a pulse sigal indicating that a reference mark has been detected; and a reference position detection unit (84) which, when the synchronized signal changes to a predetermined value after the reference signal generation unit (82) has generated the pulse signal, generates a reference position signal indicating that a predetermined reference position has been detected.
Inventors:
MORIYUKI YOSHINOBU (JP)
KANESHIGE HIROSHI (JP)
KANESHIGE HIROSHI (JP)
Application Number:
PCT/JP2014/062403
Publication Date:
November 13, 2014
Filing Date:
May 08, 2014
Export Citation:
Assignee:
THK CO LTD (JP)
International Classes:
G01D5/244
Domestic Patent References:
| WO2013047610A1 | 2013-04-04 |
Foreign References:
| JP2003083771A | 2003-03-19 | |||
| JPH0654516A | 1994-02-25 | |||
| JP2008289345A | 2008-11-27 |
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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