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2. 发明授权

US5856802A Vehicle navigator 失效
标题翻译：车载导航仪
公开(公告)号：US5856802A
公开(公告)日：1999-01-05
申请号：US871902
申请日：1997-06-12
申请人： Taro Ura , Kenichi Nakano , Keiichi Zenmyo , Kazuhiko Ikeda
发明人： Taro Ura , Kenichi Nakano , Keiichi Zenmyo , Kazuhiko Ikeda
IPC分类号： G01C21/00 , G01C21/10 , G01C21/28 , G01P15/00 , G01S19/14 , G01S19/49 , G08G1/0969 , H04B7/185 , G01S5/02
CPC分类号： G01C21/28 , G01S19/49 , G01S19/52
摘要： A vehicle navigator for calculating a running distance of a vehicle from output data of an acceleration sensor, an increase of accumulated errors during the calculation of the vehicle running distance being suppressed. The vehicle navigator has an acceleration sensor for detecting an acceleration of the vehicle; a velocity calculator for calculating a first velocity of the vehicle on the basis of an acceleration detected by the acceleration sensor; a GPS receiver for receiving radio waves from artificial satellites and obtaining a second velocity; a velocity correcting unit for correcting the first velocity by using the second velocity; a running distance calculator for calculating the running distance of the vehicle from the velocity corrected by the velocity correcting unit; and a velocity limiter for setting a velocity limit value range relative to the first velocity if the second velocity cannot be obtained from the GPS receiver, in order to control the first velocity so that it does not exceed the velocity limit value range.
摘要翻译：一种用于根据加速度传感器的输出数据计算车辆行驶距离的车辆导航仪，在计算车辆行驶距离期间的累积误差的增加被抑制。车辆导航器具有用于检测车辆的加速度的加速度传感器; 速度计算器，用于基于由加速度传感器检测到的加速度来计算车辆的第一速度; 用于从人造卫星接收无线电波并获得第二速度的GPS接收机; 速度校正单元，用于通过使用第二速度来校正第一速度; 运行距离计算器，用于根据由速度校正单元校正的速度计算车辆的行驶距离; 以及速度限制器，用于如果不能从GPS接收器获得第二速度，则相对于第一速度设定速度限制值范围，以便控制第一速度使其不超过速度限制值范围。

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