| 摘要 |
<p>PURPOSE:To simply and smoothly control the speed of an operatorless vehicle by controlling the duty ratio of a chopper control circuit in response to a voltage for controlling the leftside or rightside direction based on the induced voltage of left and right side pickup coils. CONSTITUTION:A direction control voltage induced by an induction wire by a pair of right and left side pickup coils which are mounted at the positions laterally symmetric to the center line of an operatorless vehicle is inputted to a terminal 47. When a pulse from a rotary pulse encoder El is inputted, a flip-flop 46 is set, and a transistor 52 is turned OFF. Thus, a capacitor 49 is charged by a direction control voltage, and when the charging voltage of the capacitor 49 reaches the set value, the flip-flop 46 is reset. The set output of the flip-flop 46 is supplied to a capacitor 56, and a pulse signal in response to the charged voltage of the capacitor 56 is outputted as a motor control signal.</p> |
