JP2007043618A - Power line communication coupling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power line communication coupling apparatus which can easily perform connection among different phases. <P>SOLUTION: Information is transmitted by utilizing a power line 13 between three-wire type power lines of different phases. A power line communication coupling apparatus comprises a pair of plugs 20, 21 to be inserted into outlets 18, 19 connected to the power line 13, a different-phase outlet detection circuit part 30 connected to the plugs 20, 21, and a different-phase coupling circuit part 32 connected to the plugs 20, 21. Switches SW11, SW12, SW21, SW22 are provided for switchably making the different-phase outlet detection circuit part 30 and the different-phase coupling circuit part 32 turn on/off. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power line communication coupling device for transmitting information using power lines between power lines having different phases of a three-wire power line.

  Conventionally, communication using a power line has been put to practical use with the advantage that it is not necessary to provide a separate communication line by using an existing power line. In this power line communication, the power line wired in the office or home is a single-layer three-wire power line, and in order to perform communication using the power line, a power line communication signal ( A coupler having a frequency filter of the PLC signal is required. As shown in FIG. 3, the inter-phase communication coupler 2 is installed in a distribution board 6 of a house 4 to which a power line 3 is connected. As a result, even in the outlets 8 and 9 connected to different L1 phase and L2 phase power lines, information communication signals are exchanged via the inter-phase communication coupler 2, and the single-phase three-wire power lines have different phases. Communication between power lines becomes possible.

Further, as disclosed in Patent Document 1, a connector that uses an outlet plug to connect power lines to different phases and forms a detour for a power line having poor transfer characteristics to improve communication quality Devices have also been proposed.
Japanese Patent Laid-Open No. 2003-234681

  In the case of the above-described conventional technology, the interphase communication coupler 2 is attached to the distribution board 6 in the house 4, so that the installation work must be performed by an electrician, and power line communication cannot be easily used. This has hindered the spread of power line communications. Moreover, even if it is going to use power line communication using an outlet plug like the said patent document 1, a general user can easily identify which wiring combination is different phase or in phase in indoor wiring. It was something that could not be determined.

  The present invention has been made in view of the above-described problems of the prior art. In communication using a power line, a power line that can easily check a combination of power lines between phases and easily connect between phases. An object is to provide a communication coupling device.

  The present invention relates to a power line communication coupling device for transmitting information using power lines between power lines of different phases of a three-wire power line, and a pair plugged into an outlet connected to a power line wired in a house. Plug, a different-phase outlet detection circuit unit connected to each plug, and a different-phase coupling circuit unit connected to each plug and performing communication signals between the different-phase power lines. The power line communication coupling device is provided with a switch for switching on and off the detection circuit unit and the inter-phase coupling circuit unit in a switchable manner.

  The heterophase outlet detection circuit unit includes a switch and an LED connected to each plug. The inter-phase coupling circuit section includes a pulse transformer that transmits and receives a communication signal.

  The pair of plugs is provided with a mark for distinguishing the polarity of the power line.

  According to the power line communication coupling device of the present invention, when performing power line communication, a general user such as a resident of a house can easily check the power lines of different phases, and has no special skills or qualifications. However, power line communication can be easily performed.

  Hereinafter, embodiments of the power line communication coupling device of the present invention will be described. 1 and 2 show an embodiment of the present invention. A power line communication coupling device 10 of this embodiment uses an electric power line to transmit an information signal between power lines having different phases of a single-phase three-wire power line. It is for transmission.

  As shown in FIG. 1, the power line communication coupling device of this embodiment is provided with plugs 20 and 21 that are, for example, household wiring outlets and are connected to outlets 18 and 19 of different phases. The plug 20 is provided with a mark 22 for distinguishing the hot side of the power line 13. The plugs 20 and 21 are respectively connected to ends of a pair of cables 24 and 25 for information communication having an appropriate length.

  The cables 24 and 25 are connected to the different-phase outlet detection circuit unit 30 and the different-phase coupling circuit unit 32 through the inter-power supply capacitors 26 and 27 and the capacitors 28 and 29, respectively, which are frequency filters that allow communication signals to pass. Has been.

  The pair of cables 24 of the plug 20 is connected to the different phase outlet detection circuit unit 30, and one cable 24 on the mark 22 side is connected in series to the switch SW 11 via the capacitor 26. The switch SW11 is connected to the anode of the diode 34, and the cathode of the diode 34 is connected to the anode of the LED 38 via the resistor 36. The cathode of the LED 38 is connected to the other cable 24 connected to one end of the capacitor 27 and the plug 20.

  Similarly, one of the pair of cables 25 of the plug 21 is connected to the switch SW12 via the capacitor 28, and the switch SW12 is connected to the anode of the diode 34 of the different phase outlet detection circuit unit 30. The other cable 25 on the side of the plug 21 to which the mark 22 is attached is connected to the cathode of the LED 38 via a capacitor 29.

  Further, the pair of cables 24 of the plug 20 branches through capacitors 26 and 27 and is connected to the inter-phase coupling circuit unit 32. In the interphase coupling circuit section 32, the switch SW21 is connected in series from one cable 24 on the side with the mark 22 through the branch section, and further, one end of one coil 40a of the pulse transformer 40 that transmits and receives a communication signal. It is connected to the. The other end of the coil 40 a is connected to the other capacitor 27 connected to the plug 20.

  The other coil 40b of the pulse transformer 40 is connected between one capacitor 28 of the cable 25 whose one end is connected to the plug 21 and the switch SW12. The other terminal of the coil 40b is connected between the other capacitor 29 of the cable 25 and the cathode of the LED 38 via the switch SW22, and is connected to the cable 25 connected to the side with the mark 22 via the capacitor 29. .

  In the method of using the power line communication coupling device 10 of this embodiment, first, plugs 20 and 21 are connected to outlets 18 and 19 used for power line communication. At this time, the polarity of the outlets 18 and 19 is confirmed. Usually, a slightly shorter slit of the pair of outlets is the hot side. As a confirmation method, it can be easily confirmed by a voltage detection driver. Then, the plugs 20 and 21 are inserted into the outlets 18 and 19 so that the terminal with the mark 22 faces the hot side of the outlet.

  Next, the switches SW11 and SW12 of the different-phase outlet detection circuit unit 30 are turned on, and the switches SW21 and SW22 of the different-phase coupling circuit unit 32 and the different-phase coupling circuit unit 32 are turned off. Thereby, when LED38 of the different phase outlet detection circuit part 30 lights, it turns out that the outlets 18 and 19 are different phases. When not lit, the outlets 18 and 19 are in phase, and the outlets 18 and 19 can be used for power line communication as they are. However, in order to perform power line communication in the building or the like, a cross-phase coupling circuit must be attached to the power line. Therefore, when the LED 38 does not light, the combination of the outlets 18 and 19 is changed to plugs 20 and 21 into different outlets. Similarly, the inspection is performed until the LED 38 is lit.

  When the LED 38 is lit, the switches SW11 and SW12 are turned off, and the switches SW21 and SW22 of the interphase coupling circuit unit 32 are turned on. Thereby, coupling for communication is made between the L1 phase and the L2 phase of different systems of the power line 13.

  The power line communication coupling device 10 of this embodiment can determine whether or not the combination of the power lines 13 is different from each other simply by inserting the plugs 20 and 21 into an outlet such as a house. Interphase coupling can be easily achieved simply by inserting 21 into power line communication.

  The power line communication coupling device of the present invention is not limited to the above embodiment, and the different phase outlet detection circuit unit may be a method for detecting sounds other than LEDs, and the configuration of the different phase coupling circuit unit is also used for communication. The circuit can be set according to the frequency of the signal.

1 is a schematic circuit diagram of a power line communication coupling device according to an embodiment of the present invention. It is a schematic diagram which shows the usage method in the house of the power line communication coupling | bonding apparatus of this embodiment. It is a schematic diagram which shows the example of installation of the conventional power line communication coupling | bonding apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Power line communication coupling device 13 Power line 14 House 16 Distribution board 18, 19 Outlet 20, 21 Plug 22 Mark 24, 25 Cable 30 Different phase outlet detection circuit part 32 Different phase coupling circuit part 38 LED
40 pulse transformer

Claims (4)

  In a power line communication coupling device for transmitting information using power lines between power lines having different phases of the three-wire power lines, a pair of plugs inserted into outlets connected to the power lines wired in the house, A different-phase outlet detection circuit unit connected to each plug, and a different-phase coupling circuit unit that transmits and receives a communication signal between the different-phase power lines connected to the plugs; A power line communication coupling device, characterized in that a switch for switching on and off a switch circuit between different phases is provided.   The power line communication coupling device according to claim 1, wherein the heterophase outlet detection circuit unit includes a switch and an LED connected to each plug.   The power line communication coupling device according to claim 1, wherein the inter-phase coupling circuit unit includes a pulse transformer that transmits and receives a communication signal. The power line communication coupling device according to claim 1, wherein the pair of plugs is provided with a mark for distinguishing the polarity of the power line.

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