| 摘要 |
<p>A vehicle control system, such as a rubber tired system in which a speed and direction signal is transmitted to a vehicle operational in the system. The speed and direction signal is binary coded and frequency modulated such that the respective frequencies of the binary ONES and ZEROS determine the direction of travel, and the order of the binary ONES and ZEROS determines the speed of the vehicle. If the vehicle is to travel in a forward direction along the vehicle travel path, the binary ONE and ZERO signals are at first and second frequencies respectively, and if the vehicle is to travel in the reverse direction along the vehicle travel path, the binary ONE and ZERO signals are at third and fourth frequencies respectively.</p> |
