To provide a tire displacement amount acquisition method and a tire displacement amount acquisition device capable of acquiring an accurate displacement amount of a predetermined part of a tire in a dynamic state.SOLUTION: A reference marker 50 is disposed on a wheel 21 so as to be asymmetric with respect to the rotation axis of the wheel 21; a side wall portion 22 and the wheel 21 of the tire 20 in a reference state are photographed by a camera to acquire a reference image; the side wall portion 22 and the wheel 21 of the tire 20 in a dynamic state in which the tire 20 is in contact with the ground and rotated are captured by a camera to obtain dynamic images; at least one of the reference image and the dynamic image is image-processed so that the reference marker 50 included in the reference image and the reference marker 50 included in the dynamic image coincide with each other in the same coordinate system; and the distance between an image of a predetermined position of the sidewall portion 22 included in the reference image and an image of the predetermined position of the sidewall portion 22 included in the dynamic image is acquired as the displacement amount of the predetermined position.SELECTED DRAWING: Figure 3
【課題】動的状態にあるタイヤの所定部位の正確な変位量を取得できるタイヤ変位量取得方法及びタイヤ変位量取得装置を提供する。【解決手段】ホイール21の回転軸線に関して非対称となるように基準マーカー50をホイール21に配設し、基準状態にあるタイヤ20のサイドウォール部22及びホイール21をカメラによって撮影して基準撮像を取得し、タイヤ20を接地させて回転させた動的状態にあるタイヤ20のサイドウォール部22及びホイール21をカメラによって撮影して動的撮像を取得し、基準撮像に含まれている基準マーカー50と動的撮像に含まれている基準マーカー50とが同一座標系において互いに一致するように基準撮像及び動的撮像の少なくとも1つを画像処理し、基準撮像に含まれているサイドウォール部22の所定部位の撮像と動的撮像に含まれているサイドウォール部22の所定部位の撮像との間の距離を所定部位の変位量として取得する。【選択図】図3
TIRE DISPLACEMENT AMOUNT ACQUISITION METHOD AND TIRE DISPLACEMENT AMOUNT ACQUISITION DEVICE
タイヤ変位量取得方法及びタイヤ変位量取得装置
2019-04-25
Patent
Electronic Resource
Japanese
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