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    • 80. 发明授权
    • Process for establishing the driving direction of a vehicle with an
electronic compass
    • 用电子罗盘确定车辆行驶方向的过程
    • US4729172A
    • 1988-03-08
    • US802011
    • 1985-11-07
    • Gunther AlberterHarald BauerGerhard Hettich
    • Gunther AlberterHarald BauerGerhard Hettich
    • G01C17/28G01C17/38
    • G01C17/38
    • In a process for establishing the driving direction of a vehicle by an electronic compass fixedly mounted in the vehicle and which is provided with a magnetometer having a computerized evaluation circuit the local curve (O) of the earth field (He) is determined from five measuring points (M1 . . . M5) which are established by turning the vehicle and corresponding signals are stored. The parameters for the center point displacement (Hs), the shape (ellipse) and the turning (angle .alpha.) of the local curve (O) in the vector diagram (x,y) are calculated by the computer by means of an algorithm with five unknowns for the five measuring points and thereafter the direction of the earth field (He) is computed. Subsequently, the vehicle is oriented to a predetermined cardinal direction and a correction angle is determined from the difference of angles between the cardinal and north directions and the earth's magnetic field direction measured by the compass. In the subsequent measurements the correcting angle is then taken into consideration when establishing the driving direction (.phi.) from the local curve (O).
    • PCT No.PCT / DE85 / 00122 Sec。 371日期:1985年11月7日 102(e)1985年11月7日PCT PCT公布1985年4月17日PCT公布。 出版物WO86 / 00128 日本1986年1月3日。在通过固定安装在车辆中的电子罗盘建立车辆行驶方向的过程中,并且设置有具有计算机化评估电路的磁力计,地球场的局部曲线(O) 他)是通过转向车辆建立的五个测量点(M1 ... M5)确定的,并存储相应的信号。 计算机通过计算机计算出矢量图(x,y)中的局部曲线(O)的中心点位移(Hs),形状(椭圆)和转动角(α)的参数, 五个测量点的五个未知数,然后计算地球场(He)的方向。 随后,车辆被定向到预定的基本方向,并且根据由罗盘测量的基本方向和北方向之间的角度与地球的磁场方向之间的角度来确定校正角度。 在随后的测量中,当从局部曲线(O)建立驱动方向(phi)时,考虑校正角度。