公开(公告)号：US5459667A

公开(公告)日：1995-10-17

申请号：US181023

申请日：1994-01-14

申请人： Hideo Odagaki ,  Shingo Tsuda

发明人： Hideo Odagaki ,  Shingo Tsuda

IPC分类号： G01C21/30 ,  G06F165/00

CPC分类号： G01C21/30

摘要： A vehicle navigation apparatus comprises a control unit for computing an optimum travel route between a departure point and a destination of a vehicle to calculate similarity values each indicating degree of similarity between the pattern of the travel locus of the vehicle and the pattern of each of the travel roads included in a road map. The vehicle navigation apparatus further comprises a control unit for selecting, from the road map, candidate travel roads each having a road pattern having a similarity value exceeding a predetermined similarity level. The candidate travel roads includes a present travel road on which the vehicle is currently traveling. The control unit determines as to whether or not one of the candidate travel roads overlaps with the optimum travel route. A display or a loudspeaker informs to a vehicle driver that the vehicle comes to travel on the optimum travel route when it comes to be determined that one of the candidate travel roads overlaps with the optimum travel route, and informs to the vehicle driver that the vehicle comes to stray from the optimum travel route when it comes to be determined that no candidate travel road overlaps with the optimum travel route. The vehicle navigation apparatus thus constructed can flexibly determine whether the vehicle strays from the optimum travel route, thereby making it possible to prevent the vehicle driver from being perplexed by wrong information.

摘要翻译： 车辆导航装置包括：控制单元，用于计算车辆的出发点和目的地之间的最佳行驶路线，以计算各自指示车辆的行驶轨迹的图案与每个车辆的图案之间的相似度的相似度值 旅行路线包含在路线图中。 车辆导航装置还包括控制单元，用于从道路地图中选择具有超过预定相似度的相似度值的道路图案的候补行驶道路。 候选行驶道路包括车辆当前行驶的当前行驶路。 控制单元确定候选行驶道路中的一个是否与最佳行驶路线重叠。 当确定一个候补行驶道路与最佳行驶路线重叠时，显示器或扬声器向车辆驾驶员通知车辆在最佳行驶路线上行驶，并且向车辆驾驶员通知车辆 当确定没有候选人旅行路线与最佳旅行路线重叠时，偏离最佳旅行路线。 这样构成的车辆用导航装置能够灵活地判定车辆是否从最佳行驶路线偏离，从而能够防止车辆驾驶员误认为错误的信息。