PROBLEM TO BE SOLVED: To accurately measure a road curvature.SOLUTION: An on-vehicle system sets a special section on the basis of map data. In particular, the on-vehicle system sets an entrance section 103 containing a start point 101 of a curve 100 and an exit section 105 containing a terminal 102 of the curve, and further sets a special section 120 containing the entrance section and a special section 121 containing the exit section. At the time, a difference between the entrance section and the special section containing the entrance section, is larger than a difference between the exit section and the special section containing the exit section. The on-vehicle system measures a road curvature on the basis of plural road surface images which are photographed in a measurement period. During travel in the special sections, a measurement result based on new road surface images is more reflected, relative to during travel in other section, in measurement of the road curvature.SELECTED DRAWING: Figure 4

    【課題】道路の曲率を精度良く計測する。【解決手段】車載システムは、地図データに基づき特別区間を設定する。具体的には、カーブ100の始点101を含む入口区間103と、カーブの終点102を含む出口区間105とを設定する。また、入口区間を含む特別区間120と、出口区間を含む特別区間121とを設定する。この時、入口区間と、該入口区間を含む特別区間との差分は、出口区間と、該出口区間を含む特別区間との差分よりも大きい。また、車載システムは、計測期間に撮影された複数の路面画像に基づき道路曲率を計測する。そして、特別区間の走行中は、他の区間の走行中に比べ、新しい路面画像に基づく計測結果がより反映された状態で、道路曲率を計測する。【選択図】図4


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    Title :

    ROAD CURVATURE MEASUREMENT DEVICE


    Additional title:

    道路曲率計測装置


    Contributors:

    Publication date :

    2017-04-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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