US 9,852,514 B2 · Multi-scale method for measuring the shape, movement and/or deformation of a structural part subjected to stresses by creating a plurality of colorimetric speckled patterns

Abstract

Disclosed is a method for measuring movement and/or deformation of a study part subjected to an external stress, the method implementing a color digital image acquisition device and image correlation unit. The method includes: acquisition (250) of a plurality of color digital images of the surface of the study part by way of the color digital image acquisition device during the application of an external stress on the study part, and processing (260) of the color digital images acquired in the step of acquisition of a plurality of color digital images so as to highlight contrasting details on variable scales.

Claims20

Dependent claims

A method for measuring movement and/or deformation of a study part (150) subjected to an external stress, said method implementing a color digital image acquisition device (110) and image correlation means, comprising the steps of:

applying an external stress on said study part (150),
acquiring (250) a plurality of color digital images (500) of the surface of the study part (150) by means of the color digital image acquisition device (110) while applying the external stress on said study part (150),
processing (260) of the color digital images (500) acquired in the step of acquisition (250) of a plurality of color digital images (500) so as to highlight contrasting details on variable scales, and
correlating (270, 280) all of the processed digital images (260) to determine the fields of movement on the scales associated with each processing operation (260).

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/905,597Filed 9 Jul 2014

Priority

FR 13 5696115 Jul 2013

Published

US 2016/0155240 A12 Jun 2016

Granted

26 Dec 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

G06T 7/248
Using feature-based methods, e.g. the tracking of corners or segments: involving reference images or patches
G01B 11/167
For measuring the deformation in a solid, e.g. optical strain gauge: by projecting a pattern on the object
G01M 5/005
By determining deflection or stress: by means of external apparatus, e.g. test benches or portable test systems
G01M 11/081
Testing mechanical properties: by using a contact-less detection method, i.e. with a camera

Multi-scale method for measuring the shape, movement and/or deformation of a structural part subjected to stresses by creating a plurality of colorimetric speckled patterns

Life of this patent

Multi-scale method for measuring the shape, movement and/or deformation of a structural part subjected to stresses by creating a plurality of colorimetric speckled patterns

Life of this patent

Abstract

Claims20