Importance

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Abstract

The present invention is a method and measurement apparatus for measuring the profile of a railway wheel while the railway wheel is in rolling motion on a rail. The railway wheel has a gage side and a field side and a circumferentially defined running surface and flange. The measurement apparatus comprises a first sensor means that is disposed on the field side of the railway wheel and which is disposed at an included angle with respect to the rail that is less than orthogonal senses the profile of the running surface and flange of the railway wheel at a point on the circumference. A second sensor means is disposed on the gage side of the railway wheel and senses selected wheel parameters. A controller is operably communicatively coupled to the first and second sensor means. The controller activates the first sensor means responsive to the detection of the presence of a railway wheel and applies the selected railway wheel parameters sensed by the second sensor means to the wheel profile sensed by the first sensor means to generate an actual profile measurement of the railway wheel running surface and flange taken along a plane defined by a radial section of the railway wheel.

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First Claim