PROBLEM TO BE SOLVED: To accurately measure the tread radius of a rotating tire.SOLUTION: The method for measuring the tread radius of a tire includes a tread radius measuring process comprising a measurement step, an equalization step and a calculation step. The measurement step includes measuring distances in a radial direction to the tread surface of a rotating tire from three laser displacement gauges to acquire m pieces of radial direction distance data y1, y2 and y3 per round of the tire. The equalization step includes performing smoothing processing to each of the m pieces of radial direction distance data y1, y2 and y3 and averaging remaining radial direction distance data after removing noise data to require average values y1N, y2N and y3N. The calculation step includes calculating a tread radius TR from the average values y1N, y2N and y3N and distances x1, x2 and x3 of the laser displacement gauges in the axial direction of the tire.

    【課題】回転するタイヤからトレッドラジアスを精度良く測定する。【解決手段】 測定ステップと平均化ステップと算出ステップとを含むトレッドラジアス測定工程を具える。測定ステップでは、3つのレーザー変位計から回転するタイヤのトレッド表面までの半径方向の距離を測定し、半径方向距離データy1、y2、y3をタイヤ1周当たりm個取得する。平均化ステップでは、各m個の半径方向距離データy1、y2、y3に対してスムージング処理を施し、ノイズデータを除去した後の残りの半径方向距離データを平均して平均値y1N、y2N、y3Nを求める。算出ステップでは、平均値y1N、y2N、y3Nと、各レーザー変位計のタイヤ軸方向の距離x1、x2,x3とからトレッドラジアスTRを算出する。【選択図】図1


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    Title :

    METHOD FOR MEASURING TREAD RADIUS OF TIRE AND DEVICE FOR MEASURING TREAD RADIUS USED THEREFOR


    Additional title:

    タイヤのトレッドラジアス測定方法、及びそれに用いるトレッドラジアス測定装置


    Contributors:
    MARUOKA KIYOTO (author) / ITO SATOSHI (author) / ITO TAKESHI (author)

    Publication date :

    2015-09-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / B60C VEHICLE TYRES , Fahrzeugreifen



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