Title:
ROTARY ENCODER, ROTARY MOTOR AND ROTARY MOTOR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/152076
Kind Code:
A1
Abstract:
Provided are a rotary encoder, a rotary motor and a rotary motor system in which the origin of a position can be detected with improved detection precision by utilising diffraction interference light, and in which reduction in size and manufacturing etc. are facilitated. An encoder comprises: a circular plate-shaped disk (110) which is rotatably arranged about an axis of rotation, which has one ring-shaped track (TC) having rotary gratings respectively formed therein, and which has one or more origin detection regions (h) formed in a section thereof; and a mask which is arranged in fixed manner facing the disk (110) and has one or more fixed gratings formed therein so as to construct a diffraction interference light system with the rotary gratings. A plurality of slits (SLA, SLB) included in at least one of the rotary gratings is formed along curved lines that are formed by bending a plurality of radial lines, which are centred about the axis of rotation, in the circumferential direction with a prescribed degree of curvature; the slits (SLA, SLB) are formed in such a way that the pitches (pLA, pLB) of the slits (SLA, SLB) can be set to prescribed values.
Inventors:
YAMAGUCHI, Yosuke (2-1 Kurosaki-Shiroishi, Yahatanishi-ku, Kitakyushu-sh, Fukuoka 04, 〒8060004, JP)
山口 陽介 (〒04 福岡県北九州市八幡西区黒崎城石２番１号 株式会社安川電機内 Fukuoka, 〒8060004, JP)
YOSHIDA, Yasushi (2-1 Kurosaki-Shiroishi, Yahatanishi-ku, Kitakyushu-sh, Fukuoka 04, 〒8060004, JP)
山口 陽介 (〒04 福岡県北九州市八幡西区黒崎城石２番１号 株式会社安川電機内 Fukuoka, 〒8060004, JP)
YOSHIDA, Yasushi (2-1 Kurosaki-Shiroishi, Yahatanishi-ku, Kitakyushu-sh, Fukuoka 04, 〒8060004, JP)
Application Number:
JP2011/051198
Publication Date:
December 08, 2011
Filing Date:
January 24, 2011
Export Citation:
Assignee:
KABUSHIKI KAISHA YASKAWA DENKI (2-1 Kurosaki-Shiroishi, Yahatanishi-ku Kitakyushu-sh, Fukuoka 04, 〒8060004, JP)
株式会社安川電機 (〒04 福岡県北九州市八幡西区黒崎城石２番１号 Fukuoka, 〒8060004, JP)
YAMAGUCHI, Yosuke (2-1 Kurosaki-Shiroishi, Yahatanishi-ku, Kitakyushu-sh, Fukuoka 04, 〒8060004, JP)
山口 陽介 (〒04 福岡県北九州市八幡西区黒崎城石２番１号 株式会社安川電機内 Fukuoka, 〒8060004, JP)
株式会社安川電機 (〒04 福岡県北九州市八幡西区黒崎城石２番１号 Fukuoka, 〒8060004, JP)
YAMAGUCHI, Yosuke (2-1 Kurosaki-Shiroishi, Yahatanishi-ku, Kitakyushu-sh, Fukuoka 04, 〒8060004, JP)
山口 陽介 (〒04 福岡県北九州市八幡西区黒崎城石２番１号 株式会社安川電機内 Fukuoka, 〒8060004, JP)
International Classes:
G01D5/38; G01D5/347
Attorney, Agent or Firm:
SAKAI, Hiroaki (Sakai International Patent Office, Kasumigaseki Building2-5, Kasumigaseki 3-chom, Chiyoda-ku Tokyo 20, 〒1006020, JP)
Download PDF:
Claims: