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1. (WO2018020415) METHOD AND STATION FOR CHECKING TYRES FOR VEHICLE WHEELS

Pub. No.:    WO/2018/020415    International Application No.:    PCT/IB2017/054501
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Wed Jul 26 01:59:59 CEST 2017
IPC: G01M 17/02
Applicants: PIRELLI TYRE S.P.A.
Inventors: BOFFA, Vincenzo
TERSI, Luca
BALLARDINI, Valeriano
Title: METHOD AND STATION FOR CHECKING TYRES FOR VEHICLE WHEELS
Abstract:
Method and station for checking a tyre (2) for vehicle wheels in a checking station (27). The checking station (27) comprises a background (49) with a support surface (36) lying on a plane perpendicular to a reference axis (Z), an image acquisition apparatus (47) to acquire at least one image (23) of the tyre arranged with a first outer lateral surface in contact with said support surface (37) and a second outer lateral surface (21) facing said image acquisition apparatus (47), an illumination system (50) and a computer (48) adapted to generate a working image (24) from said at least one acquired image (23) of the tyre. The method provides for the arrangement of the image acquisition apparatus (47), of the illumination system (50) and of the background (49) such as to generate a contrast, in said working image (24), between at least the entire second outer lateral surface (21) of the tyre and an area (22) circumferentially surrounding said tyre (2), said circumferentially surrounding area (22) corresponding to at least one part of the background (49), including at least one part of the support surface (36). The method also provides for the generation of the working image (24) from the acquired images and the processing of the working image (24) to carry out at least one checking procedure of the tyre (2) wherein the second outer lateral surface (21) of the tyre is distinguished from the circumferentially surrounding area (22) by means of said contrast.