公开(公告)号：US20250044077A1

公开(公告)日：2025-02-06

申请号：US18715434

申请日：2022-12-07

Applicant: ArcelorMittal

Inventor： Nathalie LABBE ,  Shu Hui HAM ,  Gwenaël LE NOC ,  Pauline LEVERONE ,  Jean-Pierre LEBACQ

IPC: G01B11/06

Abstract: A method for estimating the thickness of a varnish coating, having a thickness from 0.5 to 5 μm, of a moving steel substrate including a varnish coating including the steps of i. lighting said moving coated steel substrate with an illumination source forming an incident angle from 51° to 61° with respect to the normal of said steel substrate, ii. p-polarizing the light after reflection on said moving steel substrate and measuring the intensities of the light after reflection on said moving steel substrate, iii. assessing an absorbance spectrum of said varnish coating in said wavelength range iv. assessing an area under the curve of said absorbance spectrum AMEAS v. estimating the varnish thickness using said area under the curve and a function linking a varnish thickness and an area under the curve of an absorbance spectrum of said coating.

公开(公告)号：US20220018767A1

公开(公告)日：2022-01-20

申请号：US17413820

申请日：2019-11-28

Applicant: ArcelorMittal

Inventor： Nathalie LABBE ,  Morgan FERTE

IPC: G01N21/55 ,  G01N21/84 ,  G01N21/3563 ,  G01N21/89

Abstract: A method and a measuring equipment of the degree of crystallinity of a polymer coating on a metallic substrate using a hyperspectral camera as well as representing or mapping the degree of crystallinity is provided. An equipment for online measurement of crystallinity of polymers, including at least one hyperspectral camera, at least one lighting source, a polymer layer deposited on a substrate and means to convey the substrate, the lighting source and the hyperspectral camera being set-up in specular reflection towards the polymer layer.