Patent ID: 7040026
Filing Date: 2006-05-09
Classification: G01B,G01M

Abstract:
1. A wheel runout measuring method for measuring a lateral runout of a vehicle wheel by turning the wheel on rotating rollers, comprising the steps of: executing measurement of a lateral runout of a wheel while the wheel is rotating on the rotating rollers, and storing runout values corresponding to multiple predetermined angular measurement positions arranged successively at regular intervals in a circumferential direction of the wheel being measured; determining whether or not a runout difference between runout values measured at the beginning and the end of a single cycle of revolution of the wheel with respect to one of the predetermined angular measurement positions is within a predetermined range; and when said runout difference is determined as being within the predetermined range, specifying the difference between maximum and minimum values of the runout measured for the one angular measurement position during said single cycle of revolution of the wheel as a wheel runout amplitude and terminating the measurement, and alternately when said runout difference is determined as being outside the predetermined range, it is determined that the wheel has shifted under an external force, and in order to eliminate a measurement error caused due to shifting of the wheel, said specifying step is not performed and repeating the determining step for the next predetermined angular measurement position that leads in phase in a direction of rotation of the wheel from the angular measurement position processed at the preceding determining step, until it is determined in the determining step that a runout difference between runout values measured at the beginning and the end of a single cycle of revolution of the wheel with respect to the next predetermined angular measurement position has come within the predetermined range.