Title:
An inner circumference length measuring method of a circular member
Document Type and Number:
Japanese Patent JP6233434
Kind Code:
B2
Abstract:
An inner circumferential length measurement method for a circular member capable of accurately measuring an inner circumferential length without applying an unnecessary load of the circular member. The method includes the steps of: disposing a two-dimensional sensor (8) at a predetermined measurement position on an inner side of the circular member (12) placed flat in an unrestrained state on a support (4) so that the two-dimensional sensor (8) faces an inner circumferential surface (12a) of the circular member (12) in a non-contact state; rotating the two-dimensional sensor (8) about rotation shaft (9) at a predetermined position on the inner side of the circular member (12); measuring a separation distance (d) from the two-dimensional sensor (8) to the inner circumferential surface (12a) around an entire circumference of the circular member (12); and calculating an inner circumferential length (L) of the circular member (12) via a calculation unit (11) using the separation distance (d) measured and a distance from the rotation shaft (9) to the two-dimensional sensor (8) in a plan view.
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Inventors:
Kensuke Matsumura
Yuichi Sugiyama
Yuichi Sugiyama
Application Number:
JP2016052625A
Publication Date:
November 22, 2017
Filing Date:
March 16, 2016
Export Citation:
Assignee:
THE YOKOHAMA RUBBER CO.,LTD.
International Classes:
G01B11/02
Domestic Patent References:
| JP1195309A | ||||
| JP2013186009A | ||||
| JP2009216453A | ||||
| JP2010048731A | ||||
| JP2013134176A | ||||
| JP2001255119A | ||||
| JP2005140726A | ||||
| JP2005121438A | ||||
| JP2008151714A |
Foreign References:
| US6289600 |
Attorney, Agent or Firm:
Seiryu International Patent Service Corporation
Takayoshi in the daytime
Masao Sakaizawa
Takayoshi in the daytime
Masao Sakaizawa