To provide a tire shape calculation method, a tire shape calculation device, and an overload detection system with which it is possible to obtain the tire shape of a vehicle more continuously with higher accuracy.SOLUTION: The tire shape calculation method using the front image of a tire includes: a specification step (step S104) for specifying, from the front image, the position of a feature point that is specifiable among the feature points of a tire needed for directly identifying a reference value corresponding to a tire diameter, with deformation due to ground contact not considered, and a deformation value corresponding to the deformation of the tire; and an estimation step (step S106) for estimating an unspecified feature point that is unspecifiable in the specification step or a reference value or a deformation value identified using an unspecified feature point.SELECTED DRAWING: Figure 6

    【課題】より継続的かつより正確に車両のタイヤ形状を得ることのできるタイヤ形状算出方法、タイヤ形状算出装置及び過積載検出システムを提供する。【解決手段】タイヤの正面画像を用いたタイヤ形状算出方法は、正面画像から、接地に伴う変形を伴わないタイヤ径に応じた基準値と、タイヤの変形に応じた変形値とを直接同定するのに必要なタイヤの特徴点のうち特定可能なものの位置を特定する特定ステップ(ステップS104)、特定ステップで特定可能ではない未特定特徴点、又は未特定特徴点を用いて同定される基準値若しくは変形値を推定する推定ステップ(ステップS106)、を含む。【選択図】図6


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    Title :

    TIRE SHAPE CALCULATION METHOD, TIRE SHAPE CALCULATION DEVICE, AND OVERLOAD DETECTION SYSTEM


    Additional title:

    タイヤ形状算出方法、タイヤ形状算出装置及び過積載検出システム


    Contributors:

    Publication date :

    2019-09-19


    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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