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    • 3. 发明授权
    • Automotive drive guide system with error monitor for a magnetic compass
therein
    • 汽车驱动导向系统,带有磁罗盘的误差监视器
    • US4622754A
    • 1986-11-18
    • US465492
    • 1983-02-10
    • Satoru ChujoKenichi Mitamura
    • Satoru ChujoKenichi Mitamura
    • G01C17/28G01C17/38G01C21/00G01C21/20G01C21/28G05D1/02G01C17/30
    • G01C21/28G01C17/38
    • A drive guide system for an automotive vehicle indicates the remaining distance to a destination and the direction to the destination. In order to indicate the remaining distance and the direction in which to travel, travelling direction and travelling distance are detected. A direction sensor for detecting the terrestrial magnetic field is employed in the drive guide system. The direction sensor can be easily influenced by background noises in its surroundings. The background noise thus affects the detection of the direction of the terrestrial magnetism and thus causes errors in the calculation of the remaining distance and the direction to travel. Therefore, the variation of the background noise is sequentially monitored to detect the magnitude of the background noise affecting the detection of the direction, and when the variation exceeds acceptable limits, an error signal is produced.
    • 用于机动车辆的驱动引导系统指示到目的地的剩余距离和到目的地的方向。 为了表示剩余距离和行驶方向,检测行驶方向和行驶距离。 在驱动引导系统中采用用于检测地磁场的方向传感器。 方向传感器可以很容易地受到其周围环境的背景噪音的影响。 因此,背景噪声影响对地磁方向的检测,因此导致计算剩余距离和行进方向的误差。 因此,依次监视背景噪声的变化,以检测影响方向检测的背景噪声的大小,并且当变化超过可接受的极限时,产生误差信号。