JP2008182634A - Power line communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power line communication system that achieves power line carrier communication between terminal devices connected to different power line ducts. <P>SOLUTION: The power line communication system is equipped with a feed-in 30 which electrically connects an electric distribution panel 10 and a power line duct 20 together, and a PLC plug 60 which electrically connects power line duct 20 and a terminal device 100 together to convert communication data transmitted from the terminal device 100 into a PLC signal and to transmit it to the power line duct 20, to receive a PLC signal transmitted to the power line duct 20, and to convert the received PLC signal into a LAN signal and transmit it to the terminal device 100. The feed-in 30 is equipped with a blocking filter 32 which is connected closer to the electric distribution panel 10 than to the PLC plug 60, and stops a leak of the PLC signal to the electric distribution panel 10 and a communication unit 34 which converts a PLC signal transmitted to the power line duct 20 into a LAN signal and transmits it to a feed-in 30 connected to other power line duct 20 through a LAN 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a power line communication system using a power line duct for transmitting power.

Patent Document 1 includes a distribution board, a duct for an electric circuit (power line duct) connected to the distribution board, a plug connected to the power line duct, and a lighting device connected to the power line duct via the plug, Equipped with a centralized monitoring panel connected to the power line duct via a plug, and a signal leakage prevention filter connected between the power line duct and the distribution panel, making it easy to relocate, upgrade, etc. lighting equipment A possible power line communication system is disclosed.
JP-A-53-084195

  However, in the power line communication system of Patent Document 1, since the signal leakage prevention filter is inserted between the distribution board and the power line duct, power line carrier communication can be performed between terminal devices connected on the same power line duct. Although possible, there is a problem in that power line carrier communication cannot be performed between terminal devices connected to different power line ducts.

  An object of the present invention is to provide a power line communication system that enables power line carrier communication between terminal devices connected to different power line ducts.

  The power line communication system according to the present invention includes a distribution board, a plurality of power line ducts including a power line through which power distributed from the distribution board is transmitted, and a feed electrically connecting the distribution board and the power line duct. The power line duct and the terminal device are electrically connected to each other, the communication data transmitted from the terminal device is modulated into a power line carrier communication signal and transmitted to the power line duct, and the power line carrier communication flowing through the power line duct A PLC plug that receives the signal, demodulates the received power line carrier communication signal, and transmits the signal to the terminal device, wherein the feed-in is connected to the distribution board side of the PLC plug, and A blocking filter that prevents leakage of power line carrier communication signals to the power board, and other power line carrier communication signals that flow through the power line duct via the communication path. Characterized in that it comprises a communication unit for transmitting to the feed-in connected to the power line duct (claim 1).

  According to this configuration, the PLC plug modulates the communication data output from the terminal device into a power line carrier communication signal and transmits it to the power line duct. The feed-in connected to the power line duct transmits a power line carrier communication signal to a feed-in connected to another power line duct via a communication path. The feed-in connected to the other power line duct transmits the received power line carrier communication signal to the other power line duct. The PLC plug connected to the other power line duct demodulates the received power line carrier communication signal and transmits it to the terminal device.

  Here, the feed-in is connected to the distribution board side of the PLC plug, and the blocking filter for preventing the power line carrier communication signal from leaking to the distribution board side, and the power line carrier communication signal to the other through the communication path. And a communication unit that transmits to the feed-in connected to the power line duct. Therefore, it is possible to provide a power line communication system that enables power line communication between terminal devices connected to different power line ducts while preventing the power line communication signal from leaking to the distribution board side.

  The communication path is configured by a LAN, and the communication unit in the feed-in converts a power line carrier communication signal flowing through the power line duct into a LAN signal, transmits the LAN signal, and receives the LAN via the LAN. Preferably, the LAN signal is converted into a power line carrier communication signal and transmitted to the power line duct.

  According to this configuration, feed-ins connected to different power line ducts are connected via a LAN, and a communication unit in the feed-in converts a power line carrier communication signal flowing through the power line duct into a LAN signal and transmits it to the LAN. At the same time, the LAN signal received via the LAN is converted into a power line carrier communication signal and transmitted to the power line duct. Therefore, communication data can be transmitted and received at high speed between terminal devices connected to different power line ducts.

  In addition, the communication path is configured by a twisted pair cable, and the communication unit in the feed-in extracts a power line carrier communication signal from an electric signal flowing in the power line duct and flows the extracted signal through the twisted pair cable, and also flows through the twisted pair cable. Preferably, the power line carrier communication signal is extracted from the signal and is made to flow through the power line duct.

  According to this configuration, communication data can be transmitted and received between terminal devices connected to different power line ducts using a simple configuration such as a capacitor and a twisted pair cable.

  The power line duct includes a feed-in connection part to which the feed-in is detachably connected, and the feed-in is a duct connection part to which the feed-in connection part is detachably connected, and the distribution board An input line to which the power line from the power distribution line is connected, the input line has the same structure as the feed-in connection, and the feed-in has a power line from the distribution board to the input line. It is preferable that the existing feed-in connected is connected and connected to the distribution board via the existing feed-in.

  According to this configuration, the feed-in includes a duct connection part to which the feed-in connection part of the power line duct is detachably connected and an incoming line part to which the power line from the distribution board is connected, and the incoming line part is a feed-in connection. It has the same structure as the part. Therefore, a power line communication system that enables power line communication between terminal devices connected to different power line ducts by constructing a feed-in between an existing feed-in and an existing power line duct is constructed. be able to.

  The power line duct includes a plug connection part to which the PLC plug is detachably connected, and the feed-in is connected to a power line from the distribution board and the plug connection part is detachable. It is preferable to provide a duct connection part connected to the (Claim 5).

  According to this configuration, since the feed-in includes the detachable duct connection portion in the plug connection portion included in the power line duct, it is possible to easily connect the feed-in to the plug connection portion of the power line duct, so that different power line ducts are provided. It is possible to easily construct a power line communication system that enables power line carrier communication between terminal devices connected to the.

  Further, it is preferable that a housing for storing the distribution board is further provided, and the feed-in and the communication path are disposed inside the housing.

  According to this configuration, since the feed-in and the communication path are arranged in the housing that houses the distribution board, the installation space for the feed-in and the communication path can be saved, and the distance of the communication path is shortened. , Communication reliability can be increased.

  The power line communication system according to the present invention includes a distribution board, a plurality of power line ducts including a power line to which power distributed from the distribution board is transmitted, and the power line duct detachably connected, A feed-in that electrically connects the panel and the power line duct, and a detachably connected to the power line duct, electrically connects the power line duct and the terminal device, and carries communication data transmitted from the terminal device as a power line A PLC plug that modulates a communication signal and transmits the signal to the power line duct, receives a power line carrier communication signal flowing through the power line duct, demodulates the received power line carrier communication signal, and transmits the received signal to the terminal device, and the power line duct And a communication plug that electrically connects the communication path and the power line duct, and the feed-in is connected to the PLC. A power line carrier communication signal that flows through the power line duct is provided with a blocking filter that is connected to the distribution board side of the lug and the communication plug and prevents leakage of the power line carrier communication signal to the distribution board. And a communication plug for transmitting a power line carrier communication signal received via the communication path to the power line duct, and a communication plug connected to another power line duct via the communication path. (Claim 7).

  According to this configuration, the PLC plug modulates the communication data transmitted from the terminal device into a power line carrier communication signal and transmits it to the power line duct. The communication plug connected to the power line duct transmits a power line carrier communication signal to a communication plug connected to another power line duct via the communication path. The communication plug connected to the other power line duct transmits the received power line carrier communication signal to the other power line duct. The PLC plug connected to the other power line duct demodulates the received power line carrier communication signal and transmits it to the terminal device.

  Here, the feed-in is connected to the distribution board side of the PLC plug and the communication plug, and is provided with a blocking filter for preventing the power line carrier communication signal from leaking to the distribution board side. Therefore, it is possible to provide a power line communication system that enables power line communication between terminal devices connected to different power line ducts while preventing the power line communication signal from leaking to the distribution board side.

  The communication path is formed of a twisted pair cable, and the communication plug extracts a power line carrier communication signal from a communication terminal to which the twisted pair cable is connected and an electric signal flowing through the power line duct, and flows the extracted signal through the twisted pair cable. A capacitor that extracts a power line carrier communication signal from an electric signal flowing through the twisted pair cable and flows through the power line duct, and is connected between the communication terminal and the capacitor to match impedances of the power line duct and the twisted pair cable. It is preferable to include an impedance converter (claim 8).

  According to this configuration, it becomes possible to match the impedances of the twisted pair cable and the power line of the power line duct, and the communication reliability can be further improved.

  According to the present invention, there is provided a power line communication system that enables power line carrier communication between terminal devices connected to different power line ducts while preventing a power line carrier communication signal from leaking to a distribution board side. Can do.

  Hereinafter, a power line communication system according to an embodiment of the present invention will be described. In addition, what attached | subjected the same code | symbol in each figure represents the same thing.

(Embodiment 1)
FIG. 1A shows an overall configuration diagram of a power line communication system according to Embodiment 1 of the present invention, and FIG. 1B shows a circuit diagram of a feed-in 30. The power line communication system includes a distribution board 10, a power line duct 20, a feed-in 30, a LAN (Local Area Network) 40, a power plug 50, a PLC (Power Line Communications) plug 60, a terminal device 100, and a lighting fixture. 200.

  The distribution board 10 is connected to a power line that transmits commercial power, and distributes the commercial power to each power line 70. The power line duct 20 includes a single-phase three-wire power line 70, and the power lines 70 are electrically connected to each other via the distribution board 10. Hereinafter, the power line duct 20 shown on the upper side in FIG. 1A is referred to as a power line duct 21, the power line duct 20 shown on the lower side is referred to as a power line duct 22, and the power line duct is collectively referred to as a power line duct 20. A three-phase three-wire power line may be adopted as the power line 70.

  FIG. 2 is an external configuration diagram of the power line duct 20, and FIG. 3 is a cross-sectional view of the power line duct 20. As shown in FIG. 2, the power line duct 20 includes a duct portion 23 having an elongated shape whose longitudinal direction is the wiring direction of the power line 70. An opening 24 whose longitudinal direction is the wiring direction of the power line 70 is formed in the lower portion of the duct portion 23, and a plug connection portion 74 for detachably connecting the power plug 50 and the PLC plug 60 is provided. In addition, the end of the duct portion 23 is open and serves as a feed-in connection portion 25 for connecting the feed-in 30. Further, the duct portion 23 is provided with electric paths 71 and 72 constituting a power line 70 on both left and right inner walls. The L1 phase or the L2 phase flows through the electric circuit 71, and the N phase flows through the electric circuit 72.

  As shown in FIG. 3, the plug connecting portion 74 includes a pair of holders 731 formed to face the center of the duct portion 23 on both the left and right inner walls of the duct portion 23, and the opening 24. Yes. Inside the holder 731, electric paths 71 and 72 are disposed. The top part of the holder 731 is open, the terminal part provided in the power plug 50 and the PLC plug 60 is inserted, and the power plug 50 and the PLC plug 60 and the power line duct 20 are electrically connected.

  The feed-in 30 shown in FIG. 1A is connected to the feed-in connection portion 25 of the power line duct 20 and electrically connects the distribution board 10 and the power line duct 20. The feed-in 30 is connected to the distribution board 10 side of the PLC plug 60 in the power line duct 20.

  As shown in FIG. 1B, the feed-in 30 includes an incoming line part 31, a blocking filter 32, a duct connection part 33, a communication part 34, and a LAN terminal 35. The power line 70 between the distribution board 10 and the feed-in 30 is connected to the incoming line unit 31. The blocking filter 32 includes a normal mode capacitor C1 connected between the electric circuit 71 and the electric circuit 72, and common mode choke coils L1 and L2 connected on the electric circuits 71 and 72, and outputs a PLC signal to the distribution board 10. Prevent leakage.

  The duct connection portion 33 is connected to the feed-in connection portion 25 included in the power line duct 20, electrically connects the electric path 71 of the feed-in 30 and the electric path 71 of the power line duct 20, and the electric path 72 of the feed-in 30 and the power line duct. 20 electrical paths 72 are electrically connected.

  The communication unit 34 is connected to the branch electric circuit 71a branched from the electric circuit 71 and the branch electric circuit 72a branched from the electric circuit 72, receives the PLC signal flowing in the power line duct 20 via the duct connection unit 33, and receives the received PLC signal on the LAN. Is converted to a LAN signal conforming to the communication protocol of FIG. 5 and transmitted to the feed-in 30 connected to another power line duct 20 via the LAN 40. The communication unit 34 receives a LAN signal flowing through the LAN 40, converts the received LAN signal into a PLC signal, and transmits the PLC signal to the power line duct 20.

  The LAN terminal 35 includes a modular jack to which a LAN cable 41 such as 100BASE-TX or 10BASE-T is connected.

  A LAN 40 illustrated in FIG. 1A includes a LAN cable 41 and a hub 42, and transmits a LAN signal transmitted from the communication unit 34 to the feed-in 30 connected to another power line duct 20.

  The power plug 50 includes a terminal portion that can be connected to the plug connection portion 74 of the power line duct 20, can be connected to an arbitrary position on the bottom surface 24 a of the power line duct 20, and supplies power flowing through the power line duct 20 to the lighting apparatus 200. To do.

  The PLC plug 60 includes a terminal portion that can be connected to the plug connection portion 74 of the power line duct 20, can be connected to an arbitrary position of the power line duct 20, and includes a LAN input / output unit and a power line carrier communication modem. The LAN input / output unit includes a LAN terminal to which a LAN cable 41 such as 10Base-T or 100Base-T can be connected, and is connected to the terminal device 100 via the LAN cable. The power line communication modem converts the LAN signal received by the LAN input / output unit into a PLC signal and transmits it to the power line 70, receives the PLC signal flowing through the power line 70, and converts the received PLC signal into a LAN signal. To the terminal device 100.

  4A and 4B are diagrams showing the terminal portions of the power plug 50 and the PLC plug 60, wherein FIG. 4A is a top view, FIG. 4B is a cross-sectional view along line aa, and FIG. 4C is a front view. 4A to 4C, x indicates the depth direction, y indicates the width direction, and z indicates the height direction. 4A to 4C, the terminal portion is disposed on the upper side of the main body portion 52 of the power plug 50 and the PLC plug 60, and a cylindrical portion 55 having a longitudinal direction in the z direction, and a cylinder A pair of projecting portions 53 projecting in the y, −y direction side on the side surface of the portion 55 and a pair of electrodes 54 projecting in the y, −y direction side on the side surface of the cylindrical portion 55 are provided. The protruding portion 53 has a flat plate shape and is integrally formed with the cylindrical portion 55. The electrode 54 is made of a member having a flat plate shape made of metal, and is electrically connected to an electric circuit disposed in the main body 52.

  When the electrode 54 and the protrusion 53 are inserted into the opening 24 of the power line duct 20 and the power plug 50 and the PLC plug 60 are rotated 90 degrees about the z direction, the protrusions 53 are provided on both sides of the opening 24. The electrode 54 is inserted into the holder 731 and the power plug 50 and the PLC plug 60 are electrically connected to the power line duct 20 while being fitted between the bottom surface 24 a and the holder 731. On the other hand, when the power plug 50 and the PLC plug 60 connected to the power line duct 20 are rotated by 90 degrees about the z direction, the fitting of the protruding portion 53 is released and the connection between the electrode 54 and the holder 731 is established. The power plug 50 and the PLC plug 60 can be removed from the power line duct 20 by being released.

  The terminal device 100 is composed of a personal computer connected to the PLC plug 60 via a LAN cable, and communication data is converted into a LAN signal conforming to the LAN communication protocol to the terminal device 100 connected to another power line duct 20. While transmitting, the communication data transmitted from the terminal device 100 connected to the other power line duct 20 are received. The terminal device 100 may be a device other than a personal computer such as a digital camera. Moreover, the lighting fixture 200 is comprised from lighting fixtures, such as a fluorescent lamp, a light bulb, and a light emitting diode. Further, in the power plug 50, a household electrical appliance such as a television receiver or a washing machine may be connected instead of the lighting apparatus 200.

  Next, the operation of the power line communication system according to Embodiment 1 will be described. When communication data is transmitted as a LAN signal from the terminal device 100 connected to the power line duct 21, the PLC plug 60 connected to the power line duct 21 converts the transmitted LAN signal into a PLC signal to the power line duct 21. Send. The feed-in 30 connected to the power line duct 21 receives the PLC signal flowing through the power line 70, converts the received PLC signal into a LAN signal, and transmits it to the feed-in 30 connected to the power line duct 22 via the LAN 40. The feed-in 30 converts the received LAN signal into a PLC signal and transmits it to the power line duct 22. The PLC plug 60 connected to the power line duct 22 receives the PLC signal flowing through the power line duct 22, converts the received PLC signal into a LAN signal, and transmits the LAN signal to the terminal device 100 via the LAN cable.

  As described above, according to the power line communication system of the first embodiment, the feed-in 30 is connected to the distribution board 10 side of the PLC plug 60, and blocking that prevents the PLC signal from leaking to the distribution board 10 side. The filter 32 and the communication part 34 which transmits PLC signal to the feed-in 30 connected to the power line duct 22 via LAN40 are provided. Therefore, it is possible to provide a power line communication system that enables power line carrier communication between the terminal devices 100 connected to different power line ducts 20 while preventing the PLC signal from leaking to the distribution board 10 side.

(Embodiment 2)
Next, a power line communication system according to Embodiment 2 of the present invention will be described. FIG. 5A shows an overall configuration diagram of the power line communication system according to the second embodiment, and FIG. 5B shows a circuit diagram of the feed-in 30. The power line communication system according to the second embodiment is characterized in that the feed-in 30 is connected via a twisted pair cable 80.

  As shown in FIG. 5B, the communication unit 37 included in the feed-in 30 includes a capacitor C2 connected on the branch electric circuit 71a branched from the electric circuit 71 and a capacitor connected on the branch electric circuit 72a branched from the electric circuit 72. C2 and extracts a PLC signal from the electrical signal flowing in the power line duct 20 and sends it to the twisted pair cable 80, and extracts a PLC signal from the electrical signal flowing in the twisted pair cable 80 and sends it to the power line duct 20. The communication terminal 36 electrically connects one conducting wire constituting the twisted pair cable 80 and the branching electric circuit 71a, and electrically connects the other conducting wire constituting the twisted pair cable 80 and the branching electric circuit 72a. The twisted pair cable 80 is composed of a pair of conductive wires, and transmits a PLC signal transmitted and received between the feed-in 30 of the power line duct 21 and the feed-in 30 of the power line duct 22.

  Next, the operation of the power line communication system according to the second embodiment will be described. When communication data is transmitted as a LAN signal from the terminal device 100 connected to the power line duct 21, the PLC plug 60 connected to the power line duct 21 converts the transmitted LAN signal into a PLC signal to the power line duct 21. Send. The feed-in 30 connected to the power line duct 21 receives the PLC signal flowing through the power line 70, transmits the received PLC signal to the feed-in 30 connected to the power line duct 22 via the twisted pair cable 80, and feed-in 30. Transmits the received PLC signal to the power line duct 22. The PLC plug 60 connected to the power line duct 22 receives the PLC signal flowing through the power line duct 22, converts the received PLC signal into a LAN signal, and transmits the LAN signal to the terminal device 100 via the LAN cable.

  As described above, according to the power line communication system according to the second embodiment, communication data can be transmitted and received between the terminal devices 100 connected to different power line ducts using a simple configuration such as the capacitor C2 and the twisted pair cable 80.

(Embodiment 3)
Next, a power line communication system according to Embodiment 3 of the present invention will be described. FIG. 6A shows an overall configuration diagram of the power line communication system according to the third embodiment, and FIG. 6B shows a circuit diagram of the feed-in 30. FIG. 7 is an external configuration diagram of the feed-in 30 of the power line communication system according to the third embodiment, where (a) is a side view, (b) is a top view, and (c) is a bb cross-sectional view of the incoming line portion 31. Is shown. In FIG. 7, α indicates the upward direction, β indicates the width direction, and γ indicates the longitudinal direction of the power line duct 20.

  As shown in FIG. 7C, the incoming line portion 31 is provided on the distribution board 10 side of the main body portion 38, has a substantially “U” cross section, and β, − from the inner walls 312 on both the left and right sides. A pair of holders 311 protruding in the β direction is provided. The holder 311 has the same structure as the holder 731 shown in FIG. 3, the electric circuit 71 is disposed inside one holder 311, and the electric circuit 72 is disposed inside the other holder 311. Further, the incoming line portion 31 has an open end face in the -γ direction. That is, the incoming line part 31 has the same structure as the feed-in connection part 25 of the power line duct 20.

  The duct connecting portion 33 is provided on the power line duct 20 side of the main body portion 38, has a longitudinal direction in the γ direction, and has a substantially rectangular cross section in the center portion 333 and β, −β on the upper side walls of the center portion 333. And a pair of flat plate-like guide portions 332 having a longitudinal direction in the γ direction, and projecting in the β and −β directions on the lower sides of both side walls of the center portion 333, and the γ direction as the longitudinal direction. Between the pair of flat plate-shaped guide portions 334 and the guide portions 332 and the guide portions 334 on both side walls of the center portion 333, and the γ direction is the longitudinal direction, and αγ And a pair of terminal portions 331 having a wedge-shaped cross section. The terminal portion 331 is provided with an electrode 331 a for electrically connecting the electric paths 71 and 72 of the feed-in 30 and the electric paths 71 and 72 of the power line duct 20. When the duct connection portion 33 is inserted into the feed-in connection portion 25 of the power line duct 20, the feed-in 30 is fitted between the holder 731 and the bottom surface 24a of the power line duct 20 shown in FIG. The guide portion 334 is fitted between the holder 731 and the upper surface of the power line duct 20, the terminal portion 331 is fitted inside the holder 731, and the power line duct 20 and the feed-in 30 are electrically connected. . The communication terminal 36 is attached with a twisted pair cable 80 using a metal screw or the like, and electrically connects the twisted pair cable 80 and the feed-in 30. The main body 38 includes a power line 70 for supplying power from the distribution board 10 side to the power line duct 20.

  The existing feed-in 190 shown in FIG. 6A is provided with a duct connection portion similar to the duct connection portion 33 shown in FIG. 7 on the right end face, and the power line 70 from the distribution board 10 is electrically connected to the left end face. This is a known feed-in that includes a terminal portion connected to the power distribution board 10 and electrically connects the power line 70 from the distribution board 10 and the power line duct 20. Therefore, for the existing power line communication system in which the power line duct 20 is connected to the distribution board 10 via the existing feed-in 190, the existing feed-in 190 is removed from the power line duct 20 and the feed-in 30 shown in FIG. It is possible to construct a power line communication system that enables power line communication between terminal devices 100 connected to different power line ducts 20 by performing a simple operation such as attaching between the feed-in 190 and the power line duct 20. it can.

(Embodiment 4)
Next, a power line communication system according to Embodiment 4 of the present invention will be described. FIG. 8A shows an overall configuration diagram of the power line communication system according to the fourth embodiment, and FIG. 8B shows a circuit diagram of the feed-in 30 according to the fourth embodiment. FIG. 9 is an external configuration diagram of the feed-in 30, (a) is a top view, and (b) is a side view. In addition, in this Embodiment, the same thing as Embodiment 1-3 is attached | subjected the same code | symbol, and description is abbreviate | omitted.

  As shown in FIG. 9, the feed-in 30 according to the fourth embodiment is provided with a duct connection part 39 at the upper part of the main body part 38. The duct connecting portion 39 has the same structure as the terminal portions of the power plug 50 and the PLC plug 60 shown in FIG. 4 and is connected to the plug connecting portion 74 shown in FIG. Are electrically connected.

  That is, when the electrode 54 and the protrusion 53 are inserted into the opening 24 of the power line duct 20 and the feed-in 30 is rotated 90 degrees around the α direction, the protrusions 53 are provided on both sides of the opening 24. While being fitted between the bottom surface 24 a and the holder 731, the electrode 54 is inserted into the holder 731, and the feed-in 30 is electrically connected to the power line duct 20. On the other hand, when the feed-in 30 connected to the power line duct 20 is rotated 90 degrees about the α direction, the fitting of the protrusion 53 is released, and the connection between the electrode 54 and the holder 731 is released, and the feed The in 30 can be removed from the power line duct 20.

  As described above, according to the power line communication system according to the fourth embodiment, the feed-in 30 includes the duct connection portion 39 that can be attached to and detached from the plug connection portion 74 included in the power line duct 20, and thus the plug connection portion 74 of the power line duct 20. Thus, it is possible to easily connect the feed-in 30 to each other, and it is possible to construct a power line communication system that enables power line carrier communication between the terminal devices 100 connected to different power line ducts 20. Further, since the feed-in 30 can be attached to the bottom surface 24a of the power line duct 20, even if there is no space between the power line duct 20 and the distribution board 10, the feed-in 30 is connected to the power line duct 20. Can be connected.

(Embodiment 5)
Next, a power line communication system according to Embodiment 5 of the present invention will be described. FIG. 10A shows an overall configuration diagram of the power line communication system according to the fifth embodiment, and FIG. 10B shows a circuit diagram of the feed-in 30. The power line communication system according to the fifth embodiment is characterized in that the feed-in 30 is disposed inside the housing 11 that houses the distribution board 10.

  The distribution board 10 includes a housing 11 and a branch breaker 12. The branch breaker 12 connected to the power line duct 21 is connected to a power line 70 that distributes the power supplied from the power company, and supplies power to the power line duct 21 or blocks it. The branch breaker 12 connected to the power line duct 22 is connected to a power line 70 that distributes the power supplied from the power company, and supplies or blocks power to the power line duct 22.

  FIG. 11 shows an external configuration diagram of the feed-in 30 according to the fifth embodiment, where (a) shows a side view and (b) shows a top view. A terminal portion 393 for electrically connecting the branch breaker 12 and the feed-in 30 by screwing the power line 70 between the branch breaker 12 and the feed-in 30 is disposed at the right end of the feed-in 30. A terminal portion 391 that electrically connects the feed-in 30 and the power line duct 20 by screwing the power line duct 20 and the power line 70 between the feed-in 30 is disposed above the left end of the feed-in 30. Yes. Below the left end of the feed-in 30, the twist-in cable 80 that connects the feed-in 30 and the feed-in 30 connected to the other power line duct 20 is screwed to electrically connect the feed-in 30 to each other. A terminal portion 392 is disposed.

  Then, as shown in FIG. 10B, the feed-in 30 and the twisted pair cable 80 are disposed inside the housing 11. Therefore, the installation space of the feed-in 30 and the twisted pair cable 80 can be saved, and the distance of the twisted pair cable 80 can be shortened, and the communication reliability can be improved.

(Embodiment 6)
Next, a power line communication system according to the sixth embodiment of the present invention will be described. 12A shows an overall configuration diagram of the power line communication system according to the sixth embodiment, and FIG. 12B shows a circuit diagram of the communication plug 90. The power line communication system according to the sixth embodiment is characterized in that a twisted pair cable 80 is connected using a communication plug 90.

  The communication plug 90 includes a connection portion similar to that of the power plug 50 and the PLC plug 60 and is detachable at an arbitrary position on the bottom surface 24 a of the power line duct 20. The PLC signal flowing through the power line duct 20 is transmitted via the twisted pair cable 80. To the communication plug 90 connected to the other power line duct 20.

  Moreover, the communication plug 90 is provided with the communication part 92 and the communication terminal 91, as shown in FIG.12 (b). The communication unit 92 includes a capacitor C2 connected on the branch electric circuit 71a branched from the electric circuit 71 and a capacitor C2 connected on the branch electric circuit 72a branched from the electric circuit 72, and the PLC from the electric signal flowing in the power line duct 20 The signal is extracted and sent to the twisted pair cable 80, and the PLC signal is extracted from the electrical signal flowing through the twisted pair cable 80 and is sent to the power line duct 20. The communication terminal 91 electrically connects one conducting wire constituting the twisted pair cable 80 and the branching electric circuit 71a, and electrically connects the other conducting wire constituting the twisted pair cable 80 and the branching electric circuit 72a.

  Next, the operation of the power line communication system according to the sixth embodiment will be described. When communication data is transmitted as a LAN signal from the terminal device 100 connected to the power line duct 21, the PLC plug 60 connected to the power line duct 21 converts the transmitted LAN signal into a PLC signal to the power line duct 21. Send. The communication plug 90 connected to the power line duct 21 receives the PLC signal flowing through the power line 70, and transmits the received PLC signal to the communication plug 90 connected to the power line duct 22 via the twisted pair cable 80. Transmits the received PLC signal to the power line duct 22. The PLC plug 60 connected to the power line duct 22 receives the PLC signal flowing through the power line duct 22, converts the received PLC signal into a LAN signal, and transmits the LAN signal to the terminal apparatus 100 via the LAN cable.

  Here, the feed-in 30 includes a blocking filter 32 that is connected to the distribution board 10 side of the PLC plug 60 and the communication plug 90 and prevents the PLC signal from leaking to the distribution board 10 side. Therefore, it is possible to provide a power line communication system that enables power line carrier communication between the terminal devices 100 connected to different power line ducts 20 while preventing the PLC signal from leaking to the distribution board 10 side.

(Embodiment 7)
Next, a power line communication system according to Embodiment 7 of the present invention will be described. FIG. 13A is an overall configuration diagram of the power line communication system according to the seventh embodiment, and FIG. 13B is a circuit diagram of the communication plug 90.

  In the communication plug 90a according to the seventh embodiment, an impedance conversion unit 93 is connected between the communication unit 92 and the communication terminal 91 as shown in FIG. The impedance converter 93 includes a transformer including two windings L3 and L4 that are magnetically connected, and matches the impedance of the power line 70 of the power line duct 20 and the twisted pair cable 80. Here, the number of turns of the windings L3 and L4 is such that the impedance of the power line 70 of the power line duct 20 and the twisted pair cable 80 can be matched.

  As described above, according to the power line communication system according to the seventh embodiment, it is possible to match the impedances of the twisted pair cable 80 and the power line 70 of the power line duct 20, thereby further improving the reliability of communication.

  In the second to fifth embodiments, the twisted pair cable 80 is used. However, the present invention is not limited to this, and the LAN 40 may be used as in the first embodiment. In this case, the feed-in 30 in the second to fifth embodiments may have the same circuit configuration as the feed-in 30 in the first embodiment.

(A) shows the whole block diagram of the power line communication system by Embodiment 1, (b) has shown the circuit diagram of feed-in. An external configuration diagram of the power line duct is shown, and FIG. 3 is a partial cross-sectional view of a plug connection portion provided in the power line duct. The fragmentary sectional view of the plug connection part with which a power line duct is provided is shown. It is the figure which showed the terminal part of the electric power plug and PLC plug, (a) is a top view, (b) is aa sectional drawing, (c) has shown the front view. (A) shows the whole block diagram of the power line communication system by Embodiment 2, (b) shows the circuit diagram of feed-in. (A) shows the whole block diagram of the power line communication system by Embodiment 3, (b) shows the circuit diagram of feed-in. The external appearance block diagram of the power line communication system by Embodiment 3 is shown, (a) is a side view, (b) is a top view, (c) has shown bb sectional drawing of an incoming line part. (A) shows the whole block diagram of the power line communication system by Embodiment 4, (b) shows the circuit diagram of feed-in. The external appearance block diagram of feed-in is shown, (a) is a top view, (b) has shown the side view. (A) shows the whole block diagram of the power line communication system by Embodiment 5, (b) shows the circuit diagram of feed-in. The external appearance block diagram of Embodiment 5 by Embodiment 5 is shown, (a) is a side view, (b) has shown the top view. (A) shows the whole block diagram of the power line communication system by Embodiment 6, (b) shows the circuit diagram of a communication plug. (A) shows the whole block diagram of the power line communication system by Embodiment 7, (b) shows the circuit diagram of a communication plug.

Explanation of symbols

10 Power distribution board 20, 21, 22 Power line duct 30 Feed-in 31 Input line 32 Blocking filter 33 Duct connection part 34 Communication part 35 LAN terminal 41 LAN cable 42 Hub 50 Power plug 60 PLC plug 70 Power lines 71, 72, 75 Electrical path 71a Branch circuit 72a Branch circuit 74 Plug connection unit 80 Twisted pair cable 190 Existing feed-in 90, 90a Communication plug 91 Communication terminal 92 Communication unit 93 Impedance conversion unit 100 Terminal device 200 Lighting fixture

Claims (8)

Distribution board,
A plurality of power line ducts including a power line through which power distributed from the distribution board is transmitted;
A feed-in for electrically connecting the distribution board and the power line duct;
The power line duct and the terminal device are electrically connected, communication data transmitted from the terminal device is converted into a power line carrier communication signal and transmitted to the power line duct, and a power line carrier communication signal flowing in the power line duct is received. And a PLC plug that demodulates the received power line carrier communication signal and transmits it to the terminal device,
The feed-in is connected to the distribution board side with respect to the PLC plug, a blocking filter for preventing leakage of a power line carrier communication signal to the distribution board, and a power line carrier communication signal flowing through the power line duct. A power line communication system comprising: a communication unit that transmits to a feed-in connected to another power line duct via a communication path. The communication path is configured by a LAN,
The communication unit in the feed-in converts a power line carrier communication signal flowing through the power line duct into a LAN signal and transmits it to the LAN, and converts a LAN signal received via the LAN into a power line carrier communication signal. The power line communication system according to claim 1, wherein the power line communication system transmits to a power line duct. The communication path is constituted by a twisted pair cable,
The communication unit in the feed-in extracts a power line carrier communication signal from an electric signal flowing in the power line duct and flows it to the twisted pair cable, and also extracts a power line carrier communication signal from the electric signal flowing in the twisted pair cable. The power line communication system according to claim 1, wherein the power line communication system is configured by a capacitor that flows through the capacitor. The power line duct includes a feed-in connection portion to which the feed-in is detachably connected,
The feed-in includes a duct connection part to which the feed-in connection part is detachably connected, and an incoming line part to which a power line from the distribution board is connected,
The incoming line portion has the same structure as the feed-in connection portion,
The feed-in is characterized in that an existing feed-in to which a power line from the distribution board is connected is connected to the incoming line portion, and is connected to the distribution board via the existing feed-in. The power line communication system according to any one of claims 1 to 3. The power line duct includes a plug connection portion to which the PLC plug is detachably connected,
The feed-in includes an incoming line portion to which a power line from the distribution board is connected, and a duct connection portion to which the plug connection portion is detachably connected. The power line communication system according to item 1. A housing for housing the distribution board;
The power line communication system according to any one of claims 1 to 3, wherein the feed-in and the communication path are disposed inside the housing. Distribution board,
A plurality of power line ducts including power lines through which power distributed from the distribution board is transmitted;
A feed-in that is detachably connected to the power line duct and electrically connects the distribution board and the power line duct;
The power line duct is detachably connected, the power line duct and a terminal device are electrically connected, communication data transmitted from the terminal device is modulated into a power line carrier communication signal and transmitted to the power line duct, and A PLC plug that receives a power line carrier communication signal flowing through the power line duct, demodulates the received power line carrier communication signal, and transmits the demodulated signal to the terminal device;
A communication plug that is detachably connected to the power line duct and electrically connects the communication path and the power line duct;
The feed-in includes a blocking filter that is connected to the distribution board side of the PLC plug and the communication plug and prevents leakage of a power line carrier communication signal to the distribution board,
The communication plug transmits a power line carrier communication signal flowing through the power line duct to a communication plug connected to another power line duct via the communication path, and receives a power line carrier communication signal received via the communication path. A power line communication system comprising a communication plug for transmitting to the power line duct. The communication path is constituted by a twisted pair cable,
The communication plug is
A communication terminal to which the twisted pair cable is connected;
A capacitor that extracts a power line carrier communication signal from an electric signal flowing through the power line duct and flows it through the twisted pair cable, and a capacitor that extracts a power line carrier communication signal from the electric signal that flows through the twisted pair cable and flows through the power line duct;
The power line communication system according to claim 7, further comprising an impedance conversion unit that is connected between the communication terminal and the capacitor and matches impedances of the power line duct and the twisted pair cable.

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