Title:
DISPLACEMENT MEASUREMENT DEVICE, DISPLACEMENT MEASUREMENT METHOD, AND COMPUTER-READABLE RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2020/255231
Kind Code:
A1
Abstract:
This displacement measurement device 10 comprises: an entire-plane displacement measurement unit 11 that, from time-series images of an object, measures an entire-plane displacement on a specific surface of the object; an in-plane displacement measurement unit 12 that, from the entire-plane displacement and the time-series images, measures an in-plane displacement on the specific surface of the object; a reference signal generating unit 13 that, from the entire-plane displacement and the in-plane displacement, generates a reference signal, the level of which changes in accordance with stress produced in the specific surface of the object; and a corresponding component extraction unit 14 that, by using the reference signal and the in-plane displacement, extracts, from the in-plane displacement, an in-plane displacement component that changes in correspondence with a change in the stress produced in the specific surface of the object.
Inventors:
TAKADA JUN (JP)
Application Number:
PCT/JP2019/023982
Publication Date:
December 24, 2020
Filing Date:
June 17, 2019
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01B11/30; G01N21/88
Domestic Patent References:
| WO2019054419A1 | 2019-03-21 |
Foreign References:
| JP2008232998A | 2008-10-02 |
Other References:
SAKAGAMI, TAKAHIDE ET AL.: "Development of a Self-reference Lock-in Thermography for Remote Nondestructive Testing of Fatigue Crack (1st Report, Fundamental Study Using Welded Steel Samples", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENAINEERS SERIES A., vol. 72, no. no. 724, December 2006 (2006-12-01), pages 50 - 57, XP055773678
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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