To provide a method that can evaluate a slipping behavior accompanied by a change in a tire rolling motion state.SOLUTION: A tire slipping behavior evaluation method includes the steps of: photographing an image of a grounding tread surface in a first state a plurality of times; photographing an image of a grounding tread surface in a second state different from the first state the plurality of times; setting a characteristic point in images photographed in the first state and second state; obtaining a time sequence change in a slipping velocity of the characteristic point in the first state on the basis of a time sequence change in an amount of displacement of the characteristic point becoming obvious from a plurality of pieces of the images in the first state; obtaining a time sequence change in a slipping velocity of the characteristic point in the second state on the basis of a time sequence change in an amount of displacement of the characteristic point becoming obvious from a plurality of pieces of the images in the second state; and obtaining a time sequence change in a relative slipping velocity in the second state with the first state as a reference on the basis of the time sequence change in the slipping velocity of the characteristic point in the first state, and the time sequence change in the slipping velocity of the characteristic point in the second state.SELECTED DRAWING: Figure 3
【課題】タイヤの転動状態の変化に伴う滑り挙動を評価できる方法を提供する。【解決手段】第1状態における接地踏面の画像を複数回撮影する工程と、第1状態と異なる第2状態における接地踏面の画像を複数回撮影する工程と、第1状態及び第2状態において撮影された画像の中に特徴点を設定する工程と、第1状態での複数枚の前記画像から明らかになる前記特徴点の変位量の時系列変化に基づき、第1状態での前記特徴点の滑り速度の時系列変化を求める工程と、第2状態での複数枚の前記画像から明らかになる前記特徴点の変位量の時系列変化に基づき、第2状態での前記特徴点の滑り速度の時系列変化を求める工程と、第1状態での前記特徴点の滑り速度の時系列変化と、第2状態での前記特徴点の滑り速度の時系列変化とに基づき、第1状態を基準としたときの第2状態での相対的な滑り速度の時系列変化を求める工程と、を含む、タイヤの滑り挙動の評価方法。【選択図】図3
TIRE SLIPPING BEHAVIOR EVALUATION METHOD
タイヤの滑り挙動の評価方法
2021-05-27
Patent
Electronic Resource
Japanese
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