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    • 2. 发明申请
    • METHOD FOR CREATING SPEED PROFILES FOR DIGITAL MAPS
    • 为数字图形创建速度轮廓的方法
    • WO2010081837A1
    • 2010-07-22
    • PCT/EP2010/050364
    • 2010-01-13
    • TELE ATLAS B.V.HIESTERMANN, VolkerVAN ESSEN, RobertBASTIAENSEN, EdwinT'SIOBBEL, Stephen
    • HIESTERMANN, VolkerVAN ESSEN, RobertBASTIAENSEN, EdwinT'SIOBBEL, Stephen
    • G01C21/32G06F17/30B60W30/14
    • G01C21/3469G01C21/32Y02D30/20
    • Probe data collected at times of low traffic density is analyzed to derive a Raw Road Design Speed Limit (RRDSL, 16) for each road segment or group of segments in a digital map. The RRDSL (16), comprised of longitudinally distributed speeds, is associated with the road segment and stored in a digital medium to indicate the limits of the road section in free flow traffic. The longitudinally distributed speeds may be limited by local speed limits or other business logic to establish a Legal Raw Road Design Speed Limit (LRRDSL, 17). Either the RRDSL (16) or the LRRDSL (17) can be further modified to smooth acceleration and deceleration rates between changes in the longitudinally distributed speeds to create an Optimal Longitudinal Speed Profile (OLSP, 18), which represents optimized energy consumption. A signal can be produced if a driver's current speed rises unacceptably above a longitudinally distributed speed in real time. The signal can be audible, visible and/or haptic. Real-time traffic density information can be inferred by comparing current speed data to the longitudinally distributed speed for that position. If the current speed is consistently lower than the longitudinally distributed speed for that position, an inference is drawn that the road section is inefficient. Road efficiency assessments can be transmitted to a service center and/or other vehicles, and used by navigation software.
    • 分析在低交通密度时收集的探测数据,以得出数字地图中每个路段或一组段的原始道路设计速度限制(RRDSL,16)。 由纵向分布的速度组成的RRDSL(16)与道路段相关联并存储在数字介质中,以指示自由流量中路段的极限。 纵向分布的速度可能受到本地速度限制或其他业务逻辑的限制,以建立法定原始设计速度限制(LRRDSL,17)。 RRDSL(16)或LRRDSL(17)可以进一步修改,以平滑纵向分布速度变化之间的加速和减速率,以创建最佳纵向速度曲线(OLSP,18),其表示优化的能量消耗。 如果驾驶员的当前速度实时地高于纵向分布的速度,则可以产生信号。 信号可以是可听见的,可见的和/或触觉的。 可以通过将当前速度数据与该位置的纵向分布速度进行比较来推断实时交通密度信息。 如果当前速度一直低于该位置的纵向分布速度,则推断出路段效率低下。 道路效率评估可以传输到服务中心和/或其他车辆,并由导航软件使用。