Title:
INTERNAL CIRCUMFERENCE MEASUREMENT METHOD FOR CIRCULAR MEMBER
Document Type and Number:
WIPO Patent Application WO/2017/159195
Kind Code:
A1
Abstract:
Provided is an internal circumference measurement method for a circular member, whereby the length of an internal circumference can be precisely measured without applying unnecessary load to the circular member. A two-dimensional sensor 8 is arranged at a prescribed measurement position on the inside of the circular member 12 that has been laid flat on a platform 4 in an un-restricted state; the two-dimensional sensor 8 is faced, in a non-contact state, towards the inner circumferential surface 12a of the circular member 12 and rotated around a rotation axis 9 at a prescribed position on the inside of the circular member 12; a distance d of separation from the two-dimensional sensor 8 to the inner circumferential surface 12a is measured for the range of the entire circumference of the circular member 12; and the inner circumferential length L of the circular member 12 is calculated by a calculation unit 11, on the basis of the measured distance d of separation and a distance w between the rotation axis 9 in the planar view and the two-dimensional sensor 8.
Inventors:
MATSUMURA KENSUKE (JP)
SUGIYAMA YUICHI (JP)
SUGIYAMA YUICHI (JP)
Application Number:
PCT/JP2017/005617
Publication Date:
September 21, 2017
Filing Date:
February 16, 2017
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
G01B21/02; G01B11/02
Foreign References:
| JPH01195309A | 1989-08-07 | |||
| JP2013186009A | 2013-09-19 | |||
| JP2009216453A | 2009-09-24 | |||
| JP2010048731A | 2010-03-04 | |||
| JP2013134176A | 2013-07-08 | |||
| JP2001255119A | 2001-09-21 | |||
| JP2005140726A | 2005-06-02 | |||
| JPH037482U | 1991-01-24 | |||
| US6289600B1 | 2001-09-18 |
Other References:
See also references of EP 3431924A4
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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