US 12,449,330 B2
Method for characterizing a tire in terms of uniformity
Christophe De-Kermadec, Clermont-Ferrand (FR); Damien Lim, Clermont-Ferrand (FR); and Anthony Chanseaume, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 18/014,778
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Jul. 6, 2021, PCT No. PCT/FR2021/051251
§ 371(c)(1), (2) Date Jan. 6, 2023,
PCT Pub. No. WO2022/008841, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 2007160 (FR), filed on Jul. 7, 2020.
Prior Publication US 2024/0241014 A1, Jul. 18, 2024
Int. Cl. G01M 17/02 (2006.01); G01B 5/06 (2006.01); G01B 5/207 (2006.01); G01B 11/06 (2006.01); G01B 11/245 (2006.01); G01B 11/25 (2006.01)
CPC G01M 17/027 (2013.01) [G01B 5/068 (2013.01); G01B 5/207 (2013.01); G01B 11/0691 (2013.01); G01B 11/245 (2013.01); G01B 11/2522 (2013.01); G01M 17/021 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A device for characterizing a tire in terms of uniformity, the crown of the tire containing welded metal parts, the device comprising:
a frame;
a rotary support mounted with the ability to rotate relative to the frame and intended to accept the tire that is to be characterized;
a measuring member for measuring an angular position of the rotary support which is secured to the frame;
at least two measuring members secured to the frame and positioned respectively in such a way as to measure, for each angular position of the rotary support, an internal-surface geometry and an external-surface geometry of the tire simultaneously as the rotary support rotates; and
an electronic control unit comprising an acquisition module for acquiring internal-surface and external-surface geometry signals pertaining to the surface geometry of the tire coming from the measuring members,
wherein the electronic control unit-comprises a module for determining thickness variations of the tire for each angular position of the rotary support on the basis of the internal-surface and external-surface geometry signals, and a module for converting the thickness variations into variations in mass as a function of a predetermined mean density of the tire, the conversion module being configured to detect defects in welds of the metal parts of the crown of the tire and apply a predetermined different density to the defects, and
wherein the conversion module comprises analysis means for linking geometric measurements of a model of the tire or a serial number of the tire, the tire model or serial number being associated with a density map of the tire, the density map being a correlation between density values of semi-finished products that make up the tire and an azimuthal position of each weld on each semi-finished product that makes up the tire.