To measure accurately a wheel shape, even if a rail sinks due to the weight of rolling stocks.
This device is provided with an outside distance sensor 1a installed outside the rail 11, for measuring the distance of the wheel 100 of the rolling stock 10 to the outside flange face in a noncontact state; the inner-side distance sensor 1 inside the rail, for measuring the distance of the wheel of the rolling stock to the inner-side back face in a noncontact state; a speed detector 17 for measuring the traveling speed of the rolling stock; a vertical-direction distance sensor 16 for measuring the distance in the vertical direction up to the rail; and a sinking amount measuring means for operating the sinkage amount of the rail at the traveling time of the rolling stock from a measurement result by the vertical-direction distance sensor. The wheel shape is calculated by a processing part 7 from each measurement result by both the distance sensors 1a, 1b and the speed detector 17, the distance data related to installation of both distance sensors 1a, 1b, and the sinkage amount of the rail acquired by the sinkage amount measuring means.
TAJIMA FUJIO
OGAWA NAOHARU
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