| 摘要 |
PROBLEM TO BE SOLVED: To provide a power line communication system and method whereby a device operated by a battery can make power line communication without the need for connecting a metal line to a power line. SOLUTION: The power line communication system is configured with: a PLC signal coupling power line side transformer section 13 connected to an outlet of the power line; and a device main body 10 operated by a battery such as a notebook PC, a PDA and a small-sized household electric appliance having a PLC signal coupling main body side transformer section 14 and a signal superimposing transformer 12 connected between a PLC signal circuit of a PLC modem (not shown) for power line communication and the PLC signal coupling main body side transformer section 14. A transmission signal from the device is given to the signal superimposing transformer 12 via the PLC signal circuit, delivered to a PLC signal coupling power line side transformer section 15 via the PLC signal coupling main body side transformer section 14 through electromagnetic induction, superimposed on the power line and transmitted. A signal from other device is transmitted through a route reverse to the route above and received by the PLC signal circuit. COPYRIGHT: (C)2004,JPO
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