| 摘要 |
PURPOSE:To attain stable signal transmission including long range signal transmission by providing a means detecting the position of a current collector on the line for traveling current collector so as to discriminate the signal transmission distance of a mobile station and a fixed station and adjusting the signal transmission/reception level accordingly. CONSTITUTION:A collector 6 is run in the traveling current collector line 5 so as to transmit/receive an output high frequency signal from a monitor camera 8 with a receiver 9, a signal is supplied from a transmission unit on a self- running body 10 and the signal is monitored by the receiver 9 or a monitor panel 12. In such a case, a position detecting element 13 is arranged at points A, B near the line 5 to divide the line 5 into some sections, a detector 14 provided to the self-running body 10 detects the element 13 so that the self-running body 10 identifies the own position. Thus, an output adjusting device 15 is adjusted by the output of the detector 14 and the output of an amplifier 7 is adjusted properly and sent to the line 5. |
