Position measuring system for vehicle

摘要

An arrangement for determining the position of a vehicle along a two dimensional course and for steering the vehicle to maintain a desired preset path. A sensing device is incorporated that includes markers placed at known locations and an optical sensor sequentially makes three measurements of the angle between the vehicle and the sensors, the angular course of the vehicle and the distance travelled from the last sensing so as to provide an indication of the actual vehicle position and course. The actual position is then compared with the desired position and corrections are made by the steering mechanism.