Method for observing deformation of elastic material and apparatus for capturing projection image of elastic material

Patent metadata

Field	Value
Publication number	US-2016282286-A1
Application number	US-201415036634-A
Country	US
Kind code	A1
Filing date	Nov 6, 2014
Priority date	Nov 15, 2013
Publication date	Sep 29, 2016
Grant date	—

Abstract

To observe an elastic material under a dynamically deformed state. [Solution] A method for observing deformation of an elastic material 1 including rubber or elastomer, and an apparatus for capturing a projection image of the elastic material suitably used therefor. The observing method includes: a projection image obtaining step S 1 of capturing a projection image of at least a part of the elastic material 1 , from a direction perpendicular to an arbitrary axis of the elastic material 1 , at a plurality of capture positions P around the axis; a three-dimensional image constructing step S 2 of constructing a three-dimensional image 51 of the elastic material 1 from the projection images, and a step of observing the three-dimensional image 51 . The projection image obtaining step S 1 comprises: a deforming step S 12 of deforming the elastic material 1 in predetermined cycles; a signal output step S 13 of outputting an capture signal St at a predetermined specific time point during one cycle; and a capturing step S 14 of capturing the projection image of the elastic material 1 based on the capture signal St. The deforming step S 12 , the signal output step S 13 and the capturing step S 14 are performed at each of the capture positions.

First claim

1 . A method for observing a deformation of an elastic material including rubber or elastomer, comprising:
a projection image obtaining step of capturing a projection image of at least a part of the elastic material, from a direction perpendicular to an arbitrary axis of the elastic material, at a plurality of capture positions around the axis, a three-dimensional image constructing step of constructing a three-dimensional image of the elastic material from the projection images, and a step of observing the three-dimensional image,
characterized in that
the projection image obtaining step comprises:
a deforming step of deforming the elastic material in predetermined cycles,
a signal output step of outputting an capture signal at a predetermined specific time point during one cycle, and
a capturing step for capturing the projection image of the elastic material based on the capture signal, and
the deforming step, the signal output step and the capturing step are performed at each of the capture positions.

2 . The method for observing a deformation of an elastic material as set forth in claim 1 , wherein
the deforming step comprises a step of linearly reciprocating the elastic material while being pressed onto a contacted surface.

3 . The method for observing a deformation of an elastic material as set forth in claim 2 , wherein
the signal output step comprises a step of outputting the capture signal by detecting a specific position in the linear reciprocating motion of the elastic material.

4 . The method for observing a deformation of an elastic material as set forth in claim 1 , which further comprise
a step of preparing the elastic material whose outer peripheral surface is formed into a circular shape, and the deforming step comprises a step of rotating the circular outer peripheral surface of the elastic material while pressing onto the contacted surface.

5 . The method for observing a deformation of an elastic material as set forth in claim 4 , wherein
the deforming step comprises a step of setting a slip angle on the elastic material.

6 . The method for observing a deformation of an elastic material as set forth in claim 4 , wherein
the signal output step comprising a step of outputting the capture signal by detecting a specific position of the elastic material during rotating.

7 . The method for observing a deformation of an elastic material as set forth in claim 1 , wherein
the capturing step comprises a step of capturing the projection image including at least part of the contact portion between the elastic material and the contacted surface onto which the elastic material is pressed.

8 . The method for observing a deformation of an elastic material as set forth in claim 1 , wherein
the deforming step further comprises a step of supplying a fluid between the elastic material and the contacted surface onto which the elastic material is pressed.

9 . An apparatus for deforming an elastic material including rubber or elastomer and capturing a projection image of the elastic material, comprising:
a deforming means for deforming the elastic material in predetermined cycles by pressing it onto a contacted surface, a contact base having the contacted surface, a capture signal outputting means for outputting an capture signal at a predetermined specific time point during one cycle, and a capturing means for capturing a projection image of at least a part of the elastic material, from a direction perpendicular to an arbitrary axis of the elastic material, at a plurality of capture positions around the axis, based on the capture signal.

10 . The apparatus for capturing a projection image of an elastic material as set forth in claim 9 , wherein
the deforming means comprises a first pusher to make the elastic material linearly reciprocate while pressing onto the contacted surface.

11 . The apparatus for capturing a projection image of an elastic material as set forth in claim 10 , wherein
the first pusher includes
an electric motor having an output shaft that rotates,
a conversion device for converting the rotational motion of the output shaft to a linear reciprocating motion, and
a holder for holding the elastic material, connected to the conversion device.

12 . The apparatus for capturing a projection image of an elastic material as set forth in claim 10 , wherein
the capture signal outputting means comprises
a position detecting device for detecting a specific position in the linear reciprocating motion of the elastic material, and
a pulse generator for outputting a pulse signal based on a detection signal of the position detecting device.

13 . The apparatus for capturing a projection image of an elastic material as set forth in claim 9 , wherein
the elastic material has a circular outer peripheral surface, and the deforming means includes a second pusher for rotating the outer circumferential surface of the elastic material while pressing onto the contacted surface.

14 . The apparatus for capturing a projection image of an elastic material as set forth in claim 13 , wherein
the second pusher comprises
a holder for holding the elastic material,
a first rotating means for rotating the elastic material, and an adjuster for changing the distance between the holder and the contacted surface.

15 . The apparatus for capturing a projection image of an elastic material as set forth in claim 13 , which further comprise a slip angle setting means for setting a slip angle on the elastic material to rotate on the contacted surface.

16 . The apparatus for capturing a projection image of an elastic material as set forth in claim 13 , wherein
the contact base comprises a cylindrical drum, and the contacted surface is formed in the outer peripheral surface of the drum.

17 . The apparatus for capturing a projection image of an elastic material as set forth in claim 16 , wherein
a simulated road surface is formed in the contacted surface.

18 . The apparatus for capturing a projection image of an elastic material as set forth in claim 13 , which further comprises a second rotating means for moving the contacted surface.

19 . The apparatus for capturing a projection image of an elastic material as set forth in claim 17 , wherein
the capture signal outputting means comprises
a first rotational position detecting device for detecting a specific position the elastic material during rotating,
a second rotational position detecting device for detecting a specific position of the contacted surface during moving, and a pulse generator for outputting a pulse signal based on a detection signal of the first rotational position detection device, and a detection signal of the second rotational position detecting device.

20 . The apparatus for capturing a projection image of an elastic material as set forth in claim 9 , wherein
the capturing means comprises an X-ray camera having a shutter trigger, and the capture signal is input to the shutter trigger.

21 . The apparatus for capturing a projection image of an elastic material as set forth in claim 9 , which further comprises
a fluid supply means for supplying a fluid to a contact portion between the elastic material and the contacted surface.

22 . The apparatus for capturing a projection image of an elastic material as set forth in claim 9 , wherein
the elastic material contains marker particles.

Assignees

• Sumitomo Rubber Ind

Inventors

• Mashita Ryo
• Kishimoto Hiroyuki

Classifications

• G01N23/04

  and forming images of the material · CPC title

• G01B15/06

  for measuring the deformation in a solid · CPC title

• G01N2223/401

  image processing · CPC title

• G01M17/028

  using X-rays · CPC title

• G01N2223/627

  tyres · CPC title