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CONTACTLESS MEASUREMENT SYSTEM FOR ROAD VEHICLE WHEELS | KONTAKTLOSES MESSSYSTEM FÜR STRASSENFAHRZEUGRÄDER | SYSTÈME DE MESURE SANS CONTACT POUR ROUES DE VÉHICULES ROUTIERS

Patentnummer:EP3244161B1
IPC Hauptklasse:G01B001125
Anmelder:
Erfinder:
Anmeldung:10.05.16
Offenlegung:10.05.16
Patenterteilung:19.12.18

Abstract / Hauptanspruch
A method for measuring radial and lateral run-out in a road vehicle wheel (10), the wheel having a wheel rim (11) with inner and outer rim seats (12, 13), as well as inner and outer rim flanges (14, 15), wherein the method comprises
- providing surface profile data related to the wheel rim (11), the data being obtained through optical scanning;
- identifying a plurality of angular positions with respect to a wheel rotation axis (y);
- for each angular position, and for each rim seat (12, 13):
a) determining a measured rim profile (D') from said surface profile data,
b) calculating a simulated circle (S') of fixed radius R which is in contact with the measured rim profile (D') at a first contact point (P1) located on a rim seat (13') and at a second contact point (P2) located on the a flange (15') of the measured rim profile (D'), and
c) calculating a radial position (X) of the first contact point (P1) and a lateral position (Y) of the second contact point (P2),

- for each rim seat (12, 13), determining a radial run-out measurement curve from the radial positions (X) of the first contact points (P1) calculated over one revolution of the wheel (10) and a lateral run-out measurement curve from the lateral positions (Y) of the second contact points (P2) calculated over one revolution of the wheel (10), and
- smoothing the radial run-out measurement curve and the lateral run-out measurement curve by means of signal filtering.

EP3244161B1


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