JP4401758B2 - Specific frequency component attenuator and power line carrier communication system - Google Patents

Description

  The present invention relates to a specific frequency component attenuating device and a power line carrier communication system used for power line carrier communication that transmits a carrier signal superimposed on power by a power line.

  In recent years, as a wired communication means, a communication means called power line communication (hereinafter referred to as “PLC”) using a power line for supplying power as a communication line in addition to a telephone line, an optical fiber, or CATV has been considered.

  This PLC is a communication means for superimposing a carrier signal having a frequency of a short wave band (1.7 MHz to 30 MHz) on the power line supplying power of 100 V (50/60 Hz), and performing two-way communication using the carrier signal. It is. According to this PLC, by connecting a PLC device such as a personal computer via a PLC modem to an existing power line, power is supplied to the PLC device and a carrier signal is transmitted to the PLC device. Thus, two-way communication can be performed by the PLC device.

  Further, in such a PLC, for example, when a non-PLC device that does not communicate with a carrier signal such as a microwave oven is connected to a power line, a high-frequency component (noise) from the non-PLC device is transmitted via the power line. There is a risk of interference with the carried carrier signal, which causes an obstacle to communication in the PLC device. For this reason, it is conventionally considered to provide a specific frequency component attenuating device such as a filter device for attenuating the high frequency component inside or outside the non-PLC equipment and PLC equipment connected to the power line in the PLC (for example, patents). Reference 1 and Patent Document 2).

  However, according to the filter device, not only the high-frequency component from the non-PLC device but also the high-frequency component of the carrier signal is attenuated, so that the carrier signal itself is weakened. For this reason, when the filter device is used for performing PLC, there is a possibility that stable communication cannot be performed in the PLC device.

  On the other hand, in order to attenuate high-frequency components from non-PLC devices, it may be possible to provide a filter device for each non-PLC device. However, it is difficult and troublesome to deal with all non-PLC devices.

JP-A-6-77862 JP 7-245576 A

  The present invention has been made in view of these points, and a specific frequency component attenuation device capable of performing stable communication using a PLC device by means of a PLC without being affected by high-frequency components from non-PLC devices, and An object is to provide a power line carrier communication system.

In order to achieve the above object, the specific frequency component attenuating device according to the present invention is arranged between a power line and a power line carrier communication device and a non-power line carrier communication device that operate by being supplied with power from the power line. is connected to the power line, the power line communication device and the can be connected to both the non-power line communication device, the power line communication apparatus of the power line communication device for plug contact and the non-power-line carrier non communication device When the plug pins are formed in mutually different shapes by the presence or absence of notches in the power line communication device plug is connected, the power line communication device and the presence or absence of the notch of the connected each plug pins a switch or light sensor any non power line communication device to determine whether it is connected, the switch, the switch element The switch element is pressed or not pressed depending on whether or not each of the connected blades is notched, thereby performing an ON / OFF operation. By the ON / OFF operation, the power line carrier communication is performed. It is configured to determine which of the device and the non-power line carrier communication device is connected, and the optical sensor includes a light emitting unit, and the presence or absence of a notch in each of the connected blades Receiving the light emitted from the light emitting unit or blocking the light to determine which one of the electric wire carrier communication device and the non-power line carrier communication device is connected, and the optical sensor Or, by the discrimination of the switch, between the power line and the non-power line carrier communication device, it is generated from the non-power line carrier communication device. The specific frequency component, which is a high frequency component, is attenuated by a filter, and the transmission and attenuation of the specific frequency component are switched between the power line and the power line carrier communication device so as to transmit the specific frequency component. is there.

Also, the PLC system according to the present invention is characterized by a power line, a power line carrier communication device and a non-power line carrier communication device that are operated by being supplied with power from the power line, the power line, the power line carrier communication device, and the non-power line carrier communication. A specific frequency component attenuating device disposed between the power line and connected to the power line and connectable to both the power carrier communication apparatus and the non-power line carrier communication apparatus, the power line carrier communication apparatus, The power line carrier communication device plug connected to the specific frequency component attenuator, the non-power line carrier communication device has a non-power line carrier communication device plug connected to the specific frequency component attenuator, shape to different shapes depending on the presence or absence of each blade is notched power line carrier plug communication equipment and the plug for non-power line communication device Being, the specific frequency component attenuation unit, a switch or light to determine one connected said notch said power line communication device and the non-power-line carrier communication apparatus according to the presence or absence of each plug pins are connected The switch includes a switch element, and performs an ON / OFF operation when the switch element is pressed or not pressed depending on the presence or absence of a notch in each of the connected blades. The ON / OFF operation determines which of the power line carrier communication device and the non-power line carrier communication device is connected, and the optical sensor includes a light emitting unit and is connected. Depending on the presence or absence of the cutout of each of the stopper blades, the light emitted from the light emitting unit is received or the light is blocked, Any communication device and the non-power line communication device being adapted to determine whether it is connected, by determination of the optical sensor or the switch between the carrier communication device the power line and the non-power line, wherein The specific frequency component, which is a high frequency component generated from a non-power line carrier communication device, is attenuated by a filter, and the specific frequency component is transmitted between the power line and the power line carrier communication device. Is to switch between transmission and attenuation.

  Further, another PLC system according to the present invention is characterized in that the PLC device outputs a release signal for canceling a specific frequency component attenuation function in the specific frequency component attenuator, and the specific frequency component attenuator includes the PLC. The specific frequency component attenuation function is canceled by the input of the cancel signal by connection of the device, and the specific frequency component is transmitted between the power line and the PLC device.

  Here, the specific frequency component in each of the inventions means a frequency component that causes a failure in both-communication of PLC devices, such as a high-frequency component (noise) from a non-PLC device.

  According to the specific frequency component attenuating device and the PLC system according to the present invention, when the PLC device is connected to the power line via the specific frequency component attenuating device, the specific frequency is transmitted between the PLC device and the power line, while the non-PLC When the device is connected to the power line, the specific frequency is attenuated between the non-PLC device and the power line. In this manner, transmission of a specific frequency and switching of attenuation can be performed by a device connected to the specific frequency component attenuation device. Thereby, only the high frequency component from a non-PLC apparatus can be attenuated, without attenuating the high frequency component of the carrier signal of PLC apparatus.

  Further, the specific frequency component attenuating device can switch between transmission and attenuation of the specific frequency component by determining which of the PLC device and the non-PLC device is connected according to the shape of each connected blade. By making it possible, transmission of specific frequency components and switching of attenuation can be easily performed in the specific frequency component attenuating apparatus.

  As described above, according to the specific frequency component attenuating device and the power line carrier communication system according to the present invention, the transmission of the specific frequency and the switching of the attenuation can be performed by the device connected to the specific frequency component attenuating device. Thus, when performing communication by the PLC device, it is possible to perform stable communication without being affected by the high frequency component from the non-PLC device.

  Hereinafter, an embodiment of a power line carrier communication system according to the present invention will be described with reference to FIGS.

  FIG. 1 is a conceptual diagram showing a PLC system according to the present embodiment. As shown in FIG. 1, the PLC system 1 has a power line 2 for supplying power, and the power line 2 includes a plurality of branch power lines 2. Are respectively connected to the outlet 3. Further, the power line 2 transmits a carrier signal superimposed on the power, so that PLC is performed.

  The PLC system 1 includes a PLC device 5 such as a personal computer, for example, and a PLC device plug 7 is connected to the PLC device 5 via a PLC modem 6. As shown in FIG. 2, the PLC device plug 7 has a pair of PLC device plug blades 8, and a rectangular notch 9 is formed at the leading edge of each PLC device plug blade 8. Has been.

  The PLC system 1 includes non-PLC equipment 11 such as a microwave oven and a refrigerator, for example, and a plug 12 for non-PLC equipment is connected to the non-PLC equipment 11. The plug 12 for non-PLC equipment has a pair of plug blades 13 for non-PLC equipment, and the leading edge of each plug blade 13 for non-PLC equipment is formed in a linear shape. Thereby, the plug blade 8 for PLC equipment and the plug blade 13 for non-PLC equipment are formed in the shape from which the front-end | tip edge differs mutually.

  The PLC device 5 and the non-PLC device 11 are connected to an outlet 3 using a plug 7 for a PLC device and a plug 12 for a non-PLC device, respectively. A specific frequency component attenuating device 15 is provided between the plug 7 and the plug 12 for non-PLC equipment.

  The specific frequency component attenuating device 15 has an attenuating device main body 16, and a pair of plug blades for inserting the plug blades 8 for PLC devices and the plug blades 13 for non-PLC devices into the attenuation device main body 16. A hole 17 and a pair of plug blades 18 for connecting the specific frequency component attenuating device 15 to the outlet 3 are formed. Each plug blade 18 is connected to the power line 2 when inserted into the outlet 3. In this embodiment, two sets of plug blade holes 17 and plug blades 18 are formed in the attenuation device main body 16.

  As shown in FIG. 3, device side electrodes 20 are provided at positions corresponding to the respective plug blade holes 17 on the side of the PLC device 5 and the non-PLC device 11 in the attenuation device main body 16. When the blade 8 or the non-PLC equipment plug blade 13 is inserted into the plug blade hole 17, it comes into contact with the device-side electrodes 20.

  Thereby, in the power line 2, the PLC device 5, and the non-PLC device 11, each plug blade 18 is inserted into the outlet 3, and the PLC device plug blade 8 and the non-PLC device blade 13 are inserted into the plug blade hole 17. Thus, the specific frequency component attenuator 15 is connected.

  The attenuator main body 16 includes a switch 21 for switching power and carrier signal supply transmission paths between the power line 2 and the PLC device 5 or the non-PLC device 11, and a filter 22 for attenuating high frequency components from the non-PLC device 11. Is provided. Further, a pair of outlet-side electrodes 23 are provided inside the attenuation device main body 16 and on the outlet 3 side, and the distal end portion of each outlet-side electrode 23 is exposed from the attenuation device main body 16 and each plug blade 18. It is said that.

  The device-side electrode 20 is connected to a switch 21, and the switch 21 is connected to each outlet-side electrode 23 through a filter 22 and connected to each outlet-side electrode 23 without passing through the filter 22. . That is, the specific frequency component attenuating device 15 has a non-PLC device route through the filter 22 and a PLC device route not through the filter 22 between the device-side electrode 20 and the outlet-side electrode 23.

  As shown in FIG. 4, the switch includes a switch element 21b provided so as to protrude from the switch body 21a. The switch element 21b is a plug blade 8 for a PLC device or a non-PLC device in the damping device body 16. When the plug blade 13 is inserted into the plug blade hole 17, the plug blade 13 is disposed at a position facing the tip edge of the PLC device blade 8 or the non-PLC device blade 13. When the plug blade 13 for non-PLC equipment is inserted into the hole 17 for plug blade, the switch element 21b is moved by the tip of the plug blade 13 for non-PLC equipment as shown in FIG. When the switch element 21b is pressed, power is supplied between the device-side electrode 20 and the outlet-side electrode 23 via the non-PLC device route. On the other hand, even if the plug blade 8 for PLC equipment is inserted into the hole 17 for plug blades, the switch element 21b is not pressed by the tip of the plug blade 8 for PLC equipment, as shown in FIG. Thus, when the switch element 21b is not pressed, power is supplied via the PLC device route to transmit a carrier signal.

  Next, the operation of this embodiment will be described.

  First, a case where the PLC device 5 is connected to the power line 2 will be described.

  The specific frequency component attenuating device 15 is connected to the outlet 3, and the PLC device plug 7 of the PLC device is connected to the specific frequency component attenuating device 15. At this time, even if the plug blade 8 for the PLC device of the plug 7 for the PLC device is inserted into the hole 17 for the plug blade, the notch 9 is formed at the leading edge of the plug blade 8 for the PLC device. 21b is not pressed.

  Then, the switch 21 supplies electric power and transmits a carrier signal between the device-side electrode 20 and the outlet-side electrode 23 through a PLC device route that does not pass through the filter 22. At this time, in the route for the PLC device, power is supplied without passing through the filter 22 and the carrier signal is transmitted. Therefore, the specific frequency component is also transmitted between the power line 2 and the PLC device.

  Next, a case where the non-PLC device 11 is connected to the power line 2 will be described.

  The specific frequency component attenuator 15 is connected to the outlet 3, and the non-PLC equipment plug 12 of the non-PLC equipment 11 is connected to the specific frequency component attenuator 15. At this time, when the non-PLC equipment plug blade 13 of the non-PLC equipment plug 12 is inserted into the plug blade hole 17, the leading edge of the non-PLC equipment plug blade 13 is not formed with the notch 9 and is linear. Therefore, the switch element 21b is pressed.

  Then, the switch supplies power between the device-side electrode 20 and the outlet-side electrode 23 through a non-PLD device route via the filter 22. At this time, since power is supplied via the filter 22 in the non-PLC device route, the specific frequency component is attenuated between the power line 2 and the non-PLC device.

  According to the present embodiment, when the PLC device blade 8 is inserted, the switch element 21b is not pressed and a specific frequency is transmitted between the PLC device 5 and the power line 2, and the non-PLC device blade 13 is inserted. Then, the transmission of the specific frequency and the switching of the attenuation are performed by the device connected to the specific frequency component attenuating device 15 so that the specific frequency is attenuated between the PLC device 5 and the power line 2 by pressing the switch element 21b. Can do. Thereby, only the high frequency component from a non-PLC apparatus can be attenuated, without attenuating the high frequency component of the carrier signal of the PLC apparatus 5.

  Therefore, stable communication can be performed without being affected by high-frequency components from the non-PLC device 11 when performing communication by the PLC device 5.

In addition, according to the present PLC system 1, the specific frequency component is transmitted and attenuated by inserting the plug blade 8 for PLC equipment and the plug blade 13 for non-PLC equipment into the plug blade hole 17 of the specific frequency component attenuator 15. It is possible to turn on / off the switch 21 for switching. As a result, the specific frequency component attenuator 15 can easily transfer the specific frequency component and switch the attenuation.

  Next, the specific frequency component attenuation device 15 having a different configuration used in the PLC system 1 will be described with reference to FIG. In addition, about the same structure as the specific frequency component attenuation | damping apparatus 15 in the said embodiment, it demonstrates using the same code | symbol.

  When the plug blade 8 for a PLC device or the plug blade 13 for a non-PLC device is inserted into the hole 17 for the plug blade, the attenuator body 16 of the specific frequency component attenuator 15 has a plug blade 8 for a PLC device or a non-PLC. An optical sensor 27 having a light emitting diode 25 as a light emitting portion and a phototransistor 26 as a light receiving portion is provided at a position facing the tip edge of the device blade 13. As shown in FIG. 5A, when the non-PLC equipment blade 13 is inserted, the optical sensor 27 blocks the irradiation light irradiated from the light emitting diode 25 by the tip edge thereof, thereby causing the phototransistor 26 to No light is received. The optical sensor 27 determines that the non-PLC device 11 is connected to the specific frequency component attenuator 15 when the phototransistor 26 does not receive the irradiation light from the light emitting diode 25. Further, as shown in FIG. 5B, the optical sensor 27 has a notch 9 formed at the tip edge thereof even when the plug blade 11 for PLC equipment is inserted, and through the notch 9. Irradiated light from the light emitting diode 25 is received by the phototransistor 26. Then, when the phototransistor 26 receives the irradiation light from the light emitting diode 25, the optical sensor 27 determines that the PLC device 5 is connected to the specific frequency component attenuator 15.

  In addition, the optical sensor 27 is connected to a switch 28 that switches the power and carrier signal supply transmission path between the power line 2 and the PLC device 5 or the non-PLC device 11. When the switch 28 inputs information indicating that the non-PLC device 11 is connected from the optical sensor 27, the switch 28 supplies power via the filter 22 between the device-side electrode 20 and the outlet-side electrode 23 via the filter 22. It has become. As a result, the specific frequency component is attenuated between the power line 2 and the non-PLC device.

  On the other hand, when the switch 28 inputs information indicating that the PLC device 5 is connected from the optical sensor 27, the switch 28 supplies power via a route for the PLC device that does not pass through the filter 22 between the device-side electrode 20 and the outlet-side electrode 23. A carrier signal is transmitted. As a result, the specific frequency component is transmitted between the power line 2 and the PLC device.

  In addition, since the other structure of this specific frequency component attenuation device 15 is the same as the structure of the specific frequency component attenuation device 15 in 1st Embodiment, description is abbreviate | omitted.

  According to the present embodiment, the specific frequency component is transmitted between the PLC device 5 and the power line 2 by inserting the plug blade 8 for the PLC device and blocking the irradiation light from the light emitting diode 25, and for the non-PLC device. The specific frequency component is attenuated between the non-PLC device and the power line 2 when the plug blade 13 is inserted and the phototransistor 26 receives the irradiation light from the light emitting diode 25. That is, transmission of specific frequency components and switching of attenuation can be performed by a device connected to the specific frequency component attenuating device 15. Thereby, only the high frequency component from the non-PLC device 11 can be attenuated without attenuating the high frequency component of the carrier signal of the PLC device 5.

  Therefore, stable communication can be performed without being affected by high-frequency components from the non-PLC device 11 when performing communication by the PLC device 5.

  In addition, this invention is not limited to the said embodiment, A various change is possible as needed.

  For example, the determination of the PLC device 5 and the non-PLC device 11 and the switching of the transmission and attenuation of the specific frequency component in the specific frequency component attenuating device 15 are not limited to the above embodiments, and are determined and switched by various other configurations. It can be performed.

  For example, the PLC device 5 may output a release signal for canceling the attenuation function of the specific frequency component in the specific frequency component attenuation device 15. According to this, when the PLC device 5 is connected to the specific frequency component attenuating device 15, the release signal is input to the specific frequency component attenuating device 15, thereby releasing the attenuation function of the specific frequency component and the power line 2. A specific frequency component is transmitted to and from the PLC device. On the other hand, when the plug 12 for non-PLC equipment is connected, the specific frequency is attenuated by the attenuation function of the specific frequency component in the specific frequency component attenuating device 15.

  Further, the non-PLC device 11 may output an attenuation signal that causes the specific frequency component attenuation function 15 to perform the attenuation function of the specific frequency component. According to this, when the non-PLC device 11 is connected to the specific frequency component attenuating device 15, an attenuation signal is input to the specific frequency component attenuating device 15, thereby exhibiting the attenuation function of the specific frequency component and the power line 2. The specific frequency component is attenuated with respect to the non-PLC device 11. On the other hand, when the PLC device 5 is connected, the specific frequency component is transmitted in the specific frequency component attenuating device 15.

  Further, in the present embodiment, the specific frequency component attenuating device 15 has two sets of plug blades 18 and plug blade holes 17 formed in the attenuation device main body 16, but is not limited to such a shape. Alternatively, each plug blade 18 and each plug blade hole 17 may be formed by one set or two or more sets. Further, the damping device main body 16 may have a tap-type shape in which a plurality of plug blade holes 17 are formed and connected to the outlet 3 by a plug having a set of plug blades 18.

The conceptual diagram which shows one Embodiment of the power line carrier communication system which concerns on this invention The conceptual diagram which shows the plug for PLC apparatuses which concerns on the power line carrier communication system of FIG. 1, the plug for non-PLC apparatuses, and a specific frequency component attenuation device FIG. 1 is a conceptual diagram showing the specific frequency component attenuating device of FIG. The conceptual diagram which shows the switch of the specific frequency component attenuation | damping apparatus of FIG. The conceptual diagram which shows the optical sensor of the other specific frequency component attenuation | damping apparatus which concerns on this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 PLC system 2 Power line 3 Outlet 5 PLC equipment 7 Plug for PLC equipment 8 Plug blade for PLC equipment 11 Non-PLC equipment 12 Plug for non-PLC equipment 13 Plug blade for non-PLC equipment 15 Specific frequency component attenuation device 21 Switch 22 Filter 23 Outlet Side electrode

Claims (3)

Between the power line and the power line carrier communication device and the non-power line carrier communication device that are operated by being supplied with power from the power line, and connected to the power line, the power line carrier communication device and the non-power line carrier communication device Can be connected to both sides,
Each plug pins are formed in mutually different shapes are connected by the presence or absence of notches in the non-power-line plug carrier communication equipment of the non-power line communication device and plug contact for power line communication apparatus of the power line communication device that when, a switch or an optical sensor to determine whether any of the power line communication device and the non-power line communication device is connected by the presence of the notch of the connected each plug pins,
The switch includes a switch element, and performs an ON / OFF operation when the switch element is pressed or not pressed depending on whether or not each of the connected blades is notched, and the ON / OFF operation is performed. Through the operation, it is determined which of the power line carrier communication device and the non-power line carrier communication device is connected,
The optical sensor includes a light emitting unit, and receives the light emitted from the light emitting unit according to the presence or absence of notches in each of the connected plug blades or blocks the light, thereby the electric wire carrying communication device. And to determine which of the non-power line carrier communication devices is connected,
By discrimination of the light sensor or the switch,
Between the power line and the non-power line carrier communication device, a specific frequency component that is a high frequency component generated from the non-power line carrier communication device is attenuated by a filter,
A specific frequency component attenuating apparatus that switches between transmission and attenuation of the specific frequency component so as to transmit the specific frequency component between the power line and the power line carrier communication device. Power lines,
A power line carrier communication device and a non-power line carrier communication device that operate by being supplied with power from the power line;
A specific frequency component disposed between the power line and the power line carrier communication device and the non-power line carrier communication device and connected to the power line and connectable to both the power carrier communication device and the non-power line carrier communication device. A damping device,
The power line carrier communication device has a plug for power line carrier communication device connected to the specific frequency component attenuation device,
The non-power line carrier communication device has a plug for non-power line carrier communication device connected to the specific frequency component attenuation device,
Are formed in mutually different shapes by the presence or absence of each blade is notched in the power line plug communication equipment and the plug for non-power line communication apparatus,
The specific frequency component attenuation unit, have a switch or optical sensor either Re is judged whether it is connected to the connected said notch said power line communication device and the non-power-line carrier communication apparatus according to the presence or absence of each plug pins And
The switch includes a switch element, and performs an ON / OFF operation when the switch element is pressed or not pressed depending on whether or not each of the connected blades is notched, and the ON / OFF operation is performed. Through the operation, it is determined which of the power line carrier communication device and the non-power line carrier communication device is connected,
The optical sensor includes a light emitting unit, and receives the light emitted from the light emitting unit according to the presence or absence of notches in each of the connected plug blades or blocks the light, thereby the electric wire carrying communication device. And to determine which of the non-power line carrier communication devices is connected,
By identifying the optical sensor or the switch, a specific frequency component, which is a high frequency component generated from the non-power line carrier communication device, is attenuated by a filter between the power line and the non-power line carrier communication device, and the power line The power line carrier communication system is characterized by switching between transmission and attenuation of the specific frequency component so as to transmit the specific frequency component between the power line carrier communication devices. The power line carrier communication device outputs a release signal for releasing the specific frequency component attenuation function in the specific frequency component attenuation device;
The specific frequency component attenuating device releases the specific frequency component attenuating function and transmits the specific frequency component between the power line and the power line carrier communication device by inputting the release signal when the power line carrier communication device is connected. The power line carrier communication system according to claim 2.