CIRCULARITY MEASURING METHOD AND DEVICE OF WHEEL FOR RAILWAY VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a circularity measuring method and device of a wheel for railway vehicle capable of easily and surely measuring a circularity of the wheel for railway vehicle in a short time without requiring a lot of advance preparations and labors in order to measure the circularity of the wheel for railway vehicle.;SOLUTION: At least three non-contact type distance meters which measure a distance up to a tread surface of the wheel rolling on the rail are embedded inside a rail at intervals in the longitudinal direction of the rail. The wheel is made to roll on the rail, and the measurement result of the non-contact type distance meter at this time is read, and the measurement result is expressed by a x-y coordinate system which defines a distance between the non-contact type distance meters as an x direction being an advance direction of the wheel and a distance measured by the non-contact type distance meter as a y direction being a direction vertically orthogonal to an advance direction of the wheel, and line segments Q1, Q2 and line segments Q2, Q3 are obtained from Q1, Q2, and Q3 which are three points of the measurement result, and each intersection of the vertical bisector of the line segment is obtained, and the circularity of the wheel is measured based on the deviation from a center point of the wheel of the intersection.;COPYRIGHT: (C)2015,JPO&INPIT