Patent ID: 6233050
Filing Date: 2001-05-15
Classification: B61K,G01B

Abstract:
Apparatus for measuring unroundness and diameter of a railway wheel comprising:a rail on which a wheel to be measured can roll along a measuring zone,a guard rail to center the wheel on the rail during a measurement thereof,a plurality of light sources disposed in transversely spaced relation relative to said rail to project a plurality of light beams longitudinally of said rail to intersect the wheel at a periphery of a flange and of a rolling band of the wheel, said light sources being positioned so that said wheel obscures a portion of each said light beam as a function of the wheel diameter,a video camera aligned with each said light source to receive an image of said light beam partially obscured by said wheel,a computer connected to said video camera to determine unroundness and diameter of said wheel based on the images received by said video cameras, anda trigger system for activating the light sources and said cameras when said wheel arrives at said measuring zone and for deactivating said light sources and said cameras when said wheel exits from said measuring zone.