| 摘要 |
PURPOSE:To make a measurement error small extremely by placing two pieces of detecting and measuring instruments which have been put in two at a prescribed interval in the longitudinal direction of a rail, centering around a center point of a wheel base of front and rear wheels of a detecting and measuring truck, deriving a difference of detected and measured values of said two pieces, adding successively the difference at every run, and deriving a wear quantity of the head top surface of the rail of its position. CONSTITUTION:In a detecting and measuring truck 7 which can run on a rail 4 by a front wheel 5 and a rear wheel 6 of a wheel base L, by two pieces of detecting and measuring devices A, B which have been placed at a prescribed interval (l) in the longitudinal direction of the rail 4 between the front wheel 5 and the rear wheel 6, irregularity of the head top surface of the rail 4 is detected and measured by running the detecting and measuring truck 7 in the direction as indicated with an arrow 8. Wear quantities beta1-betan of the head top surface of the rail 4 are derived by deriving a difference of two pieces of detected and measured values which have been detected and measured by the detecting and measuring devices A, B, and adding its difference, whenever two pieces of detecting and measuring devices A, B run by its interval (l).
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