Title:
METHOD AND DEVICE FOR DETERMINING A MATERIAL FLATTENING COEFFICIENT
Document Type and Number:
WIPO Patent Application WO2005012882
Kind Code:
A3
Abstract:
The invention concerns a method and device for determining a flattening coefficient (A%) of a granular material. The method comprises the following steps: a) providing a granular material consisting of at least one particle (12), b) projecting a shadow (28) of said particle (12), c) approaching said shadow (28) with an ellipse (32), d) determining data of said ellipse (32), e) determining a length and a size of said particle from said data of the ellipse (32), f) determining an elongation factor of one particle (12), g) plotting a distribution curve of the elongation factors, h) constructing a distribution curve of flattening factors by transforming said distribution curve of elongation factors in a common benchmark, by performing an affinity in said benchmark, and i) determining a flattening coefficient (A%) on said distribution curve of flattening factors.
Inventors:
BOUQUETY MARIE-NOELLE (FR)
DESCANTES YANNICK (FR)
DE LARRARD FRANCOIS (FR)
DESCANTES YANNICK (FR)
DE LARRARD FRANCOIS (FR)
Application Number:
PCT/FR2004/002056
Publication Date:
April 07, 2005
Filing Date:
July 30, 2004
Export Citation:
Assignee:
FRANCE ETAT PONTS CHAUSSEES (FR)
BOUQUETY MARIE-NOELLE (FR)
DESCANTES YANNICK (FR)
DE LARRARD FRANCOIS (FR)
BOUQUETY MARIE-NOELLE (FR)
DESCANTES YANNICK (FR)
DE LARRARD FRANCOIS (FR)
International Classes:
G01N15/02; G01N15/14; (IPC1-7): G01N15/02
Foreign References:
| US4288162A | 1981-09-08 | |||
| US5748311A | 1998-05-05 | |||
| US4497576A | 1985-02-05 | |||
| EP1273901A1 | 2003-01-08 | |||
| US20020164063A1 | 2002-11-07 |
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