Improvements in tire uniformity testing

G - Physics – 01 – M

Patent

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G01M 17/02 (2006.01)

Patent

CA 2482473

A method and apparatus for testing tires. In step (110), the radial force variation is measured in the current direction of rotation. The first harmonic of this force variation is calculated in step (120) and a tire position corresponding to either zero crossing of the first harmonic is determined in step (130). In step (140), the tire position is monitored until a zero crossing is reached. The rotation direction is reversed at the appropriate location in step (150) and the test is continued.

La présente invention concerne un procédé et un appareil destinés à la vérification des pneus. Le procédé de l'invention comprend : une étape (110) lors de laquelle on mesure une variation de la force radiale dans la direction actuelle de rotation ; une étape (120) lors de laquelle on calcule une première harmonique de cette variation de force ; une étape (130) lors de laquelle on détermine une position de pneu correspondant à un quelconque passage par zéro de la première harmonique ; une étape (140) lors de laquelle on surveille la position du pneu jusqu'à ce qu'un passage par zéro ait été atteint ; et une étape (150) lors de laquelle on inverse la direction de rotation en un emplacement approprié. On poursuit ensuite la vérification.

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