| 摘要 |
PURPOSE:To reduce the cost of a communicating means of an unattended truck and a ground side by using alarm transmitters and receivers loaded on a truck for both a direct communication between each truck, and a communication to a ground side control device. CONSTITUTION:When an unattended truck 1 reaches a point A, a running path sensor of a collision prevention controlling circuit II detects a code plate 10, a detecting signal is inputted to a microcomputer I, a running driving motor is stopped, and also a gate open command is given to a receiver 8. Subsequently, a transmitter and a receiver 7, 8 to be used at the point A are selected and excited by a transmitter and receiver selecting circuit IV in accordance with an obstacle, and a transmitting data is sent to a communication controlling circuit IIIfrom the computer I and transmitted to a ground side control device 11 from the transmitter 7. The device 11 transmits a command of the next destination, unloading, loading, etc. from a transmitter 12. This transmitting signal is stored in a storage part of the circuit III, inputted to the computer I at a stretch when the command of once is ended, and after the operation following the command has been executed, the truck runs to the next destination. |
