Title:
METHOD AND DEVICE FOR MEASURING VISCOELASTICITY
Document Type and Number:
WIPO Patent Application WO/2018/016652
Kind Code:
A1
Abstract:
[Problem] To provide a method and device whereby viscoelasticity of an object can be measured nondestructively and in non-contact fashion in a short time. [Solution] By this method, elastic waves and light are radiated to a subject and the viscoelasticity of an object is measured nondestructively and in non-contact fashion using a shadow change based on a change in the direction of a line normal to the surface of the object. Specifically, the present invention has an elastic wave transmission step for pressurizing or exciting the object by elastic waves and causing a minute displacement of the object surface shape, a photoirradiation step for radiating light to the minutely displaced object surface, an image acquisition step for acquiring a shadow change based on a change in the direction of a line normal to the object surface, and a viscoelasticity estimation step for processing an image of the acquired shadow change and calculating a viscoelasticity. This device is configured from an elastic wave transmitting unit for causing a minute displacement of the object surface shape, a photoirradiation unit for radiating light to the object surface, a camera unit for acquiring a shadow change based on a change in the direction of a line normal to the object surface, and an estimation unit for processing an image of the acquired shadow change and calculating a viscoelasticity.
Inventors:
AOTO TAKAHITO (JP)
MUKAIGAWA YASUHIRO (JP)
MUKAIGAWA YASUHIRO (JP)
Application Number:
PCT/JP2017/026585
Publication Date:
January 25, 2018
Filing Date:
July 21, 2017
Export Citation:
Assignee:
NATIONAL UNIV CORPORATION NARA INSTITUTE OF SCIENCE AND TECHNOLOGY (JP)
International Classes:
G01N11/00
Foreign References:
| JP2007076053A | 2007-03-29 | |||
| JP2008241323A | 2008-10-09 | |||
| JPS6055244A | 1985-03-30 | |||
| JP2012037420A | 2012-02-23 | |||
| US20120271166A1 | 2012-10-25 |
Other References:
MASAYUKI ITO ET AL.: "Non-contact Type Viscometer Using Aero Sound", TECHNICAL REPORT OF IEICE, vol. 107, no. 20, 17 April 2007 (2007-04-17), pages 17 - 22
TSUTOMU KOBAYASHI ET AL.: "Viscometer of noncontact type using aerial sound", ULTRASONIC TECHNOLOGY, vol. 19, no. 3, 20 May 2007 (2007-05-20), pages 5 - 8
TSUTOMU KOBAYASHI ET AL.: "Viscometer of noncontact type using aerial sound", ULTRASONIC TECHNOLOGY, vol. 19, no. 3, 20 May 2007 (2007-05-20), pages 5 - 8
Attorney, Agent or Firm:
THE PATENT CORPORATE BODY GLOBAL INTELLECTUAL PROPERTY (JP)
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