| 摘要 |
PURPOSE:To control the braking of an unmanned car stably by discriminating whether the advancing direction of the carrier car is forward or backward and setting up slow travelling state, stop state, etc. in accordance with the discriminated result. CONSTITUTION:Receivers 8, 10 fitted to the front and back of the bottom of the carrier car 4 are constituted of receiving coils 8a, 10a and receiving circuits 8b, 10b for receiving logical signals obtained by rectifying, smoothing and binary-coding the outputs of the coils 8a, 8b respectively. When the carrier car 4 advances and reaches a stop point, the output of the front receiver 8 at the passage of the receiver 8 approximately over a transmitter 7 sets up a flip-flop (FF)11 and turns the carrier car 4 to the slow travelling state through an OR gate 12. When the carrier car 4 advances and the back receiver 10 reaches a position approximately above the transmitter 7, the output of the receiver 10 10 sets up an FF13 and drives a braking device of the carrier car 4 through an AND gate 14 to stop the carrier car 4. |
