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Patent Searching and Data


Title:
ENCODER DEVICE AND MOTION-GUIDING DEVICE PROVIDED WITH ENCODER DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/159196
Kind Code:
A1
Abstract:
Provided is an encoder device capable of reducing interference between a magnetic field generated in a reference mark and a magnetic field generated in a scale. An encoder device (6) is provided with a reference mark (7) and a head (5). The reference mark (7) has: a first scale coil (7b1); and a second scale coil (7b2) electrically connected to the first scale coil (7b1). The head (5) has: a transmission coil (8) that transmits an electromagnetic wave without any contact to the first scale coil (7b1); a reception coil (9) that receives an electromagnetic wave without any contact from the second scale coil (7b2); and electric circuits (13, 14) that generate a pulse for generating an origin signal from the electromagnetic wave received by the reception coil (9), if the transmission coil (8) faces the first scale coil (7b1) and the reception coil (9) faces the second scale coil (7b2).

Inventors:
MORIYUKI YOSHINOBU (JP)
OSHIDA TAKASHI (JP)
Application Number:
PCT/JP2017/005630
Publication Date:
September 21, 2017
Filing Date:
February 16, 2017
Export Citation:
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Assignee:
THK CO LTD (JP)
International Classes:
G01D5/244
Foreign References:
JPH102758A1998-01-06
JP2011089898A2011-05-06
JP2013255331A2013-12-19
JP2005124376A2005-05-12
Attorney, Agent or Firm:
SHIOJIMA, Toshiyuki (JP)
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