| 摘要 |
PURPOSE:To provide a power line carrier system which is simple in constitution and safe in prevention of disasters and crimes, by directly connecting a carrier suppressing filter between a commercial power line and outdoor plug socket. CONSTITUTION:When a user depresses the switch 14 of a controller 17, a signal is superposed upon a commercial power line 12 by means of the communication section 16 of the controller 17. An adaptor 20 receives and decodes the signal by means of its communication section 18 and control equipment 13 through a load controlling section 19, and then, superposed a signal indicating the controlled result upon the commercial power line 12. The signal is received and decoded by the communication section 16 of the controller 17 and the operating state of the equipment 13 is displayed on a display section. On the other hand, a blocking filter 21 is used for preventing leakage of the superposed carrier to an adjacent system and malfunctions caused by the leakage and also has a function which prevent roguery from a next-door house. In this system a carrier suppressing filter 23 is directly connected between the commercial power line 12 and an outdoor plug socket 24 without using any adaptor, etc. Therefore, the carrier transmitted from the controller 17 or adaptor 20 is suppressed by the blocking filter 21 and never transmitted to a next-door house through an electricity receiving end 22. |
