| 摘要 |
PROBLEM TO BE SOLVED: To construct a DC electromotive cable communication system using a DC electromotive cable as a transmission line for communication without laying a communication line. SOLUTION: In the DC electromotive cable communication system making a DC electromotive cable 2 and the ground a signal transmission line, the system comprises a coupling circuit 11 for cutting off a high voltage and transmitting a signal of a frequency band optimal for cable communication in both a signal transmitting side apparatus and a signal receiving side apparatus, a DC electromotive cable communication apparatus 12 is connected to each of the coupling circuits 11, and further, a DC power source 13 for generating a circuit power source by extracting an AC higher harmonic component included in the DC electromotive cable is provided to the signal receiving side apparatus, thereby mutually performing transmission/reception. COPYRIGHT: (C)2005,JPO&NCIPI
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