| 摘要 |
PURPOSE:To detect the advancing direction of a car without the influence of the geomagnetic declination and the abnormal magnetic field, by using a position detector and a running distance detector for steering of the car. CONSTITUTION:A steering angle theta and a running distance S of fore wheels are detected. The steering angle is detected by converting the quantity of the rotation of a handle and the quantity of the displacement of a tire rod to electric signals by a potentiometer, etc. Otherwise, a piezoelectric thin film, a diaphragm, or a differential transformer is used for detection of the displacement. When the wheel base is denoted as l, a radius (r) of the rotation is equal to lcottheta, and an angle alpha is obtained by expression alpha=(S.l)/tantheta because of S=ra. The direction for completion of curving of the car is at the angle alpha to the original direction. |
