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    • 10. 发明授权
    • Gradient information calculating system, vehicle running control system, navigation system, and gradient information calculating method
    • 梯度信息计算系统,车辆运行控制系统,导航系统和梯度信息计算方法
    • US08332151B2
    • 2012-12-11
    • US12918332
    • 2009-03-26
    • Hideaki SuganumaMamoru Kuraishi
    • Hideaki SuganumaMamoru Kuraishi
    • G01V3/38G01C17/38
    • B60W40/076B60G2400/824B60G2401/16B60G2600/0422B60G2800/019B60G2800/702B60W2550/141B60W2550/142
    • A gradient information calculating system includes a first calculating unit (14) that detects three-dimensional location information through autonomous navigation, and calculates a first gradient value (θb, B), based on a distance (m) traveled, and an on-plane distance (L1) obtained by projecting the distance (m) traveled on a horizontal plane, a road map information storing unit (17) that stores road map information that represents each road by nodes of which the location information is known, and a link that connects the nodes, a second calculating unit (16) that estimates elevations of the nodes from previously measured elevation data, and calculates a second gradient value (A), based on a difference in elevation between the nodes and the length of the link, and a gradient data selecting unit (19) that selects one of the first and second gradient values to be adopted as a gradient value of the link, according to a difference between the first and the second gradient values.
    • 梯度信息计算系统包括:通过自主导航检测三维位置信息的第一计算单元(14),并且基于所行进的距离(m)计算第一梯度值(η b,B) 通过投影在水平面上行进的距离(m)而获得的平面距离(L1),道路地图信息存储单元(17),其存储通过位置信息已知的节点表示每条道路的道路地图信息,以及 连接节点的链路,第二计算单元(16),其根据先前测量的高程数据估计节点的高程,并且基于节点之间的高程差和链路的长度来计算第二梯度值(A) 以及梯度数据选择单元,根据第一和第二梯度值之间的差,选择要采用的第一和第二梯度值中的一个作为链路的梯度值。