JP2009100294A - Power line communication terminal equipment - Google Patents

Power line communication terminal equipment Download PDF

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Publication number
JP2009100294A
JP2009100294A JP2007270299A JP2007270299A JP2009100294A JP 2009100294 A JP2009100294 A JP 2009100294A JP 2007270299 A JP2007270299 A JP 2007270299A JP 2007270299 A JP2007270299 A JP 2007270299A JP 2009100294 A JP2009100294 A JP 2009100294A
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power line
line communication
wiring duct
terminator
resistor
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Inventor
Shinichi Tanaka
伸一 田中
Hironobu Hori
堀　　宏展
Koji Kubota
光二 久保田
Akira Watanabe
旭 渡辺
Shinichiro Yano
紳一郎 矢野
Takashi Yoneda
孝 米田
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Panasonic Electric Works Co Ltd
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Panasonic Electric Works Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide power line communication terminal equipment which can facilitate impedance matching operation of a wiring duct. <P>SOLUTION: The power line communication terminal equipment 3 can freely change impedance by a plurality of switches 35 in accordance with the characteristic impedance of the wiring duct 4 so that a communication signal transmitted/received by a power line communication apparatus 2 is not reflected on the terminal of the wiring duct 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、配線ダクトの末端に導通可能に接続され、配線ダクトの電力に重畳された通信信号の、配線ダクトの末端での反射を防止する電力線通信用終端器に関する。   The present invention relates to a power line communication terminator that is connected to a terminal end of a wiring duct so as to be conductive and prevents reflection of a communication signal superimposed on the power of the wiring duct at the terminal end of the wiring duct.

給電用の導体を内側に備えた配線ダクトにコンセントプラグを取り付けて照明器具などの電気機器に電力を供給する配線ダクトシステムが知られている（特許文献１参照）。また、電力線を通信回線として利用するＰＬＣ（Power Line Communication）を応用し、配線ダクトに装着され、パーソナルコンピュータやネットワークカメラなどの通信機器にデータ信号を供給する電力線通信装置をもちいた電力線通信システムが考案されている。
特開昭５３−８４１９５号公報 There is known a wiring duct system in which an outlet plug is attached to a wiring duct provided with a power supply conductor inside to supply electric power to an electric device such as a lighting fixture (see Patent Document 1). Also, there is a power line communication system using a power line communication device that applies a power line communication (PLC) that uses a power line as a communication line and that is attached to a wiring duct and supplies a data signal to a communication device such as a personal computer or a network camera. It has been devised.
JP-A-53-84195

ところで、上記の電力線通信システムでは、電力線通信装置により送受信される通信信号が配線ダクトの末端で反射されないよう電力線通信用終端器を配線ダクトの末端に装着している。しかしながら、この場合、配線ダクトの特性インピーダンスに合わせて電力線通信用終端器のインピーダンスを選定しなければならず、この作業が大変手間となる。   By the way, in the above power line communication system, a power line communication terminator is attached to the end of the wiring duct so that communication signals transmitted and received by the power line communication device are not reflected at the end of the wiring duct. However, in this case, the impedance of the power line communication terminator must be selected in accordance with the characteristic impedance of the wiring duct, and this work is very laborious.

本発明は、上記の事情に鑑みてなされたものであり、その目的とするところは、配線ダクトのインピーダンス整合作業を容易にすることができる電力線通信用終端器を提供することにある。   The present invention has been made in view of the above circumstances, and an object thereof is to provide a power line communication terminator capable of facilitating impedance matching work of a wiring duct.

本発明に係る電力線通信用終端器は、上記の課題を解決するために、給電用の導体を内側に備えた配線ダクトと、この配線ダクトを介して通信信号を送受信する電力線通信装置とを有する電力線通信システムの電力線通信用終端器において、並列に接続された複数の抵抗器と、この複数の抵抗器のそれぞれに直列に接続され、当該複数の抵抗器全体の合成抵抗値を自在に切り替え可能な複数の切替手段と、複数の抵抗器及び複数の切替手段と直列に接続されたキャパシタとを備え、複数の抵抗器、複数の切替手段、及びキャパシタが配線ダクトの末端に導通可能に接続され、電力線通信装置により送受信される通信信号が配線ダクトの末端で反射されないようインピーダンスを自在に変更可能なことを特徴とする。   In order to solve the above-described problems, a power line communication terminator according to the present invention includes a wiring duct provided with a power feeding conductor inside, and a power line communication device that transmits and receives communication signals via the wiring duct. In a power line communication terminator of a power line communication system, a plurality of resistors connected in parallel and each of the plurality of resistors are connected in series, and the combined resistance value of the plurality of resistors can be freely switched. A plurality of switching means, a plurality of resistors and a capacitor connected in series with the plurality of switching means, and the plurality of resistors, the plurality of switching means, and the capacitor are connected to the end of the wiring duct so as to be conductive. The impedance can be freely changed so that communication signals transmitted and received by the power line communication device are not reflected at the end of the wiring duct.

また、本発明に係る電力線通信用終端器は、上記の課題を解決するために、給電用の導体を内側に備えた配線ダクトと、この配線ダクトを介して通信信号を送受信する電力線通信装置とを有する電力線通信システムの電力線通信用終端器において、静電容量を自在に変更可能な可変キャパシタと、この可変キャパシタと直列に接続された抵抗器とを備え、可変キャパシタ及び抵抗器が配線ダクトの末端に導通可能に接続され、電力線通信装置により送受信される通信信号が配線ダクトの末端で反射されないようインピーダンスを自在に変更可能なことを特徴とする。   Moreover, in order to solve said subject, the power line communication termination | terminus device which concerns on this invention, The power line communication apparatus which transmits / receives a communication signal via this wiring duct, and the wiring duct provided with the conductor for electric power feeding inside A power line communication terminator for a power line communication system comprising: a variable capacitor whose capacitance can be freely changed; and a resistor connected in series with the variable capacitor, wherein the variable capacitor and the resistor are connected to the wiring duct. It is characterized in that the impedance can be freely changed so that the communication signal transmitted and received by the power line communication device is not reflected at the end of the wiring duct.

さらに、本発明に係る電力線通信装置は、上記に加え、抵抗器が、抵抗値を自在に変更可能な可変抵抗器であることを特徴とする。   Furthermore, in addition to the above, the power line communication device according to the present invention is characterized in that the resistor is a variable resistor whose resistance value can be freely changed.

本発明によれば、電力線通信用終端器が、電力線通信装置により送受信される通信信号が配線ダクトの末端で反射されないよう配線ダクトの特性インピーダンスに応じてインピーダンスを自在に変更可能なので、配線ダクトのインピーダンス整合作業を容易にすることができる。   According to the present invention, the power line communication terminator can freely change the impedance according to the characteristic impedance of the wiring duct so that the communication signal transmitted and received by the power line communication device is not reflected at the end of the wiring duct. Impedance matching can be facilitated.

以下、本発明の一実施形態となる電力線通信用終端器について図１〜７を参照しながら説明する。   A power line communication terminator according to an embodiment of the present invention will be described below with reference to FIGS.

図１は、本発明が適用された電力線通信用終端器３をもちいた電力線通信システム１の主要構成を模式的に示す構成図である。   FIG. 1 is a configuration diagram schematically showing a main configuration of a power line communication system 1 using a power line communication terminator 3 to which the present invention is applied.

電力線通信システム１は、図２に示す２極又は多極の導体４ａ，４ｂを内側に備えた配線ダクト４と、この配線ダクト４に導通可能に接続された電力線通信装置２及び電力線通信用終端器３とで構成されている。   The power line communication system 1 includes a wiring duct 4 having a bipolar or multipolar conductor 4a, 4b shown in FIG. 2 inside, a power line communication device 2 connected to the wiring duct 4 so as to be conductive, and a power line communication termination. And a container 3.

配線ダクト４は、電力線１ａで分電盤６と導通可能に接続され、電力線通信装置２に分電盤６からの電力を供給する。具体的には、配線ダクト４は、分電盤６からの電圧１００Ｖの交流電力を供給する。なお、この電力には、通信回線として電力線を利用するＰＬＣ（Power Line Communication）を応用し、電力線通信装置２により送受信される通信信号が高周波成分として重畳されている。また、配線ダクト４の特性インピーダンスは、配線ダクト４の線路長や、分岐形態、分岐数などで変化する。   The wiring duct 4 is connected to the distribution board 6 through the power line 1 a so as to be conductive, and supplies power from the distribution board 6 to the power line communication device 2. Specifically, the wiring duct 4 supplies AC power having a voltage of 100 V from the distribution board 6. Note that a PLC (Power Line Communication) using a power line as a communication line is applied to this power, and a communication signal transmitted and received by the power line communication device 2 is superimposed as a high frequency component. The characteristic impedance of the wiring duct 4 varies depending on the line length of the wiring duct 4, the branching form, the number of branches, and the like.

電力線通信装置２は、パーソナルコンピュータやネットワークカメラなどの通信機器５と通信ケーブル１ｂで導通可能に接続され、通信機器５からのデータ信号を受信して所定形式の通信信号に変調し、配線ダクト４を介してこの通信信号を送信するとともに、配線ダクト４を介した通信信号を受信してデータ信号に復調し、このデータ信号を通信機器５に送信する。具体的には、１００ＢＡＳＥ−ＴＸのイーサネット（Ethernet：登録商標）などの規格、及びＰＬＣを実現する所定の通信方式に準拠した処理をすることで配線ダクト４を介したデータ通信をおこなう。   The power line communication device 2 is connected to a communication device 5 such as a personal computer or a network camera through a communication cable 1b. The power line communication device 2 receives a data signal from the communication device 5 and modulates it into a communication signal of a predetermined format. The communication signal is transmitted via the wiring duct 4, the communication signal via the wiring duct 4 is received, demodulated into a data signal, and the data signal is transmitted to the communication device 5. Specifically, data communication via the wiring duct 4 is performed by performing processing in accordance with a standard such as 100BASE-TX Ethernet (registered trademark) and a predetermined communication method for realizing PLC.

電力線通信用終端器３は、配線ダクト４の末端に脱着自在に装着され、配線ダクト４の特性インピーダンスに応じてインピーダンスが変更されることで電力線通信装置２により送受信される通信信号の、配線ダクト４の末端での反射を防止する。以下、この電力線通信用終端器３について詳しく説明する。   The power line communication terminator 3 is detachably attached to the end of the wiring duct 4, and the wiring duct of communication signals transmitted and received by the power line communication device 2 by changing the impedance according to the characteristic impedance of the wiring duct 4. Prevents reflection at the end of 4. Hereinafter, the power line communication terminator 3 will be described in detail.

［電力線通信用終端器の構成］
電力線通信用終端器３は、図３に示すように、箱形状のハウジング３ａと、ハウジング３ａの上部に設けられた接続支持部３ｂとで構成されている。 [Configuration of power line communication terminator]
As shown in FIG. 3, the power line communication terminator 3 includes a box-shaped housing 3a and a connection support portion 3b provided on the upper portion of the housing 3a.

ハウジング３ａは、内部に収容された後述する切替手段３５（以降、スイッチ３５と表記）が操作可能な構造のものである。   The housing 3a has a structure in which a switching means 35 (hereinafter referred to as a switch 35), which will be described later, housed therein can be operated.

接続支持部３ｂは、電極３ｂ１，３ｂ２及び突起３ｂ３，３ｂ４を両側面に一対ずつ有し、配線ダクト４の導体４ａ，４ｂと電極３ｂ１，３ｂ２とが導通可能に接続されるとともに、突起３ｂ３，３ｂ４により配線ダクト４にこの状態で支持される。   The connection support portion 3b has a pair of electrodes 3b1 and 3b2 and protrusions 3b3 and 3b4 on both side surfaces, and the conductors 4a and 4b of the wiring duct 4 and the electrodes 3b1 and 3b2 are connected to be conductive, and the protrusions 3b3 and 3b3 are connected. The wiring duct 4 is supported in this state by 3b4.

図４は、電力線通信用終端器３の電気的構成を示す回路図である。   FIG. 4 is a circuit diagram showing an electrical configuration of the power line communication terminator 3.

電力線通信用終端器３は、配線ダクト４の導体４ａ，４ｂに対して並列に接続された複数の抵抗器３１と、これら抵抗器３１のそれぞれに直列に接続された複数のスイッチ３５と、複数の抵抗器３１及び複数のスイッチ３５と直列に接続されたキャパシタ３３とで構成されている。   The power line communication terminator 3 includes a plurality of resistors 31 connected in parallel to the conductors 4a and 4b of the wiring duct 4, a plurality of switches 35 connected in series to each of the resistors 31, and a plurality of switches. Resistor 31 and a plurality of switches 35 and a capacitor 33 connected in series.

抵抗器３１は、抵抗値が一定な固定抵抗器であって、スイッチ３５に接続されないほうの端部が接続支持部３ｂの電極３ｂ１を介して配線ダクト４の導体４ａに接続される。   The resistor 31 is a fixed resistor having a constant resistance value, and the end not connected to the switch 35 is connected to the conductor 4a of the wiring duct 4 via the electrode 3b1 of the connection support 3b.

キャパシタ３３は、静電容量が一定な固定キャパシタであって、複数のスイッチ３５に接続されないほうの端部が接続支持部３ｂの電極３ｂ２を介して配線ダクト４の導体４ｂに接続される。   The capacitor 33 is a fixed capacitor having a constant capacitance, and the end not connected to the plurality of switches 35 is connected to the conductor 4b of the wiring duct 4 via the electrode 3b2 of the connection support 3b.

スイッチ３５は、抵抗器３１に流れる電流をオンオフするものである。具体的には、スイッチ３５は、ジャンパスイッチなどをもちいる。抵抗器３１全体の合成抵抗値は、このスイッチ３５のオンオフの組み合わせることによって所定範囲で自在に切り替え可能である。なお、所定範囲は、それぞれの抵抗器３１の抵抗値で決まる。   The switch 35 turns on and off the current flowing through the resistor 31. Specifically, the switch 35 uses a jumper switch or the like. The combined resistance value of the entire resistor 31 can be freely switched within a predetermined range by combining ON / OFF of the switch 35. The predetermined range is determined by the resistance value of each resistor 31.

以上、電力線通信用終端器３について説明したが、電力線通信用終端器３の電気的構成は、上記のほかに、前述した複数の抵抗器３１及び複数のスイッチ３５を可変抵抗器３２に置き換えたものでもよく、また、図５又は６に示すものでもよい。これらの場合、電力線通信用終端器３は、図７に示すように、後述する回転軸３ｃ，３ｄが内部からハウジング３ａの側面に突き出した外観となる。   Although the power line communication terminator 3 has been described above, the electrical configuration of the power line communication terminator 3 is obtained by replacing the plurality of resistors 31 and the plurality of switches 35 with the variable resistors 32 in addition to the above. The thing shown in FIG. 5 or 6 may be sufficient. In these cases, as shown in FIG. 7, the power line communication terminator 3 has an appearance in which rotating shafts 3c and 3d, which will be described later, protrude from the inside to the side surface of the housing 3a.

図５に示す電力線通信用終端器３は、可変キャパシタ３４と、この可変キャパシタ３４と直列に接続された可変抵抗器３２とで構成されている。   The power line communication terminator 3 shown in FIG. 5 includes a variable capacitor 34 and a variable resistor 32 connected in series with the variable capacitor 34.

可変抵抗器３２は、抵抗値を自在に変更可能なものであって、この抵抗値を変更するための回転軸３ｃを有し、可変キャパシタ３４に接続されないほうの端部が接続支持部３ｂの電極３ｂ１を介して配線ダクト４の導体４ａに接続される。   The variable resistor 32 has a resistance value that can be freely changed. The variable resistor 32 has a rotating shaft 3c for changing the resistance value. The end of the variable resistor 32 that is not connected to the variable capacitor 34 is connected to the connection support portion 3b. It is connected to the conductor 4a of the wiring duct 4 through the electrode 3b1.

可変キャパシタ３４は、静電容量を自在に変更可能なものであって、この静電容量を変更するための回転軸３ｄを有し、可変抵抗器３２に接続されないほうの端部が接続支持部３ｂの電極３ｂ２を介して配線ダクト４の導体４ｂに接続される。   The variable capacitor 34 has a capacitance that can be freely changed. The variable capacitor 34 has a rotating shaft 3d for changing the capacitance, and an end portion that is not connected to the variable resistor 32 has a connection support portion. It is connected to the conductor 4b of the wiring duct 4 via the 3b electrode 3b2.

図６に示す電力線通信用終端器３は、可変キャパシタ３４と、この可変キャパシタ３４と直列に接続された抵抗器３１とで構成されている。   The power line communication terminator 3 shown in FIG. 6 includes a variable capacitor 34 and a resistor 31 connected in series with the variable capacitor 34.

抵抗器３１は、抵抗値が一定な固定抵抗器であって、可変キャパシタ３４に接続されないほうの端部が接続支持部３ｂの電極３ｂ１を介して配線ダクト４の導体４ａに接続される。   The resistor 31 is a fixed resistor having a constant resistance value, and the end not connected to the variable capacitor 34 is connected to the conductor 4a of the wiring duct 4 via the electrode 3b1 of the connection support 3b.

可変キャパシタ３４は、静電容量を自在に変更可能なものであって、この静電容量を変更するための回転軸３ｄを有し、抵抗器３１に接続されないほうの端部が接続支持部３ｂの電極３ｂ２を介して配線ダクト４の導体４ｂに接続される。   The variable capacitor 34 has a capacitance that can be freely changed. The variable capacitor 34 has a rotating shaft 3d for changing the capacitance, and an end portion that is not connected to the resistor 31 has a connection support portion 3b. Is connected to the conductor 4b of the wiring duct 4 through the electrode 3b2.

［電力線通信用終端器の作用］
以上の構成によって、本発明が適用された電力線通信用終端器３は、配線ダクト４の末端に導通可能に接続され、複数のスイッチ３５又は回転軸３ｃ，３ｄにより配線ダクト４の特性インピーダンスに応じてインピーダンスが変更されることで電力線通信装置２により送受信される通信信号の、配線ダクト４の末端での反射を防止する。 [Operation of power line communication terminator]
With the configuration described above, the power line communication terminator 3 to which the present invention is applied is connected to the end of the wiring duct 4 so as to be conductive, and responds to the characteristic impedance of the wiring duct 4 by the plurality of switches 35 or the rotary shafts 3c and 3d. Thus, reflection of the communication signal transmitted and received by the power line communication device 2 at the end of the wiring duct 4 is prevented by changing the impedance.

［電力線通信用終端器の効果］
本発明の一実施形態によれば、電力線通信用終端器３が、電力線通信装置２により送受信される通信信号が配線ダクト４の末端で反射されないよう配線ダクト４の特性インピーダンスに応じて複数のスイッチ３５によりインピーダンスを自在に変更可能なので、配線ダクト４のインピーダンス整合作業を容易にすることができ、線路長や、分岐形態、分岐数などで配線ダクト４の特性インピーダンスが変化した場合でも容易に調整することができる。 [Effect of power line communication terminator]
According to one embodiment of the present invention, the power line communication terminator 3 includes a plurality of switches according to the characteristic impedance of the wiring duct 4 so that communication signals transmitted and received by the power line communication device 2 are not reflected at the end of the wiring duct 4. Since the impedance can be freely changed by 35, the impedance matching work of the wiring duct 4 can be facilitated, and even when the characteristic impedance of the wiring duct 4 changes due to the line length, branching form, number of branches, etc. can do.

また本発明の一実施形態によれば、電力線通信用終端器３が、電力線通信装置２により送受信される通信信号が配線ダクト４の末端で反射されないよう配線ダクト４の特性インピーダンスに応じて可変抵抗器３２によりインピーダンスを自在に変更可能なので、配線ダクト４のインピーダンス整合作業を容易にすることができ、線路長や、分岐形態、分岐数などで配線ダクト４の特性インピーダンスが変化した場合でも容易に調整することができる。   Further, according to one embodiment of the present invention, the power line communication terminator 3 has a variable resistance according to the characteristic impedance of the wiring duct 4 so that the communication signal transmitted and received by the power line communication device 2 is not reflected at the end of the wiring duct 4. Since the impedance can be freely changed by the device 32, the impedance matching work of the wiring duct 4 can be facilitated, and even when the characteristic impedance of the wiring duct 4 changes due to the line length, branching configuration, number of branches, etc. Can be adjusted.

さらに、本発明の一実施形態によれば、電力線通信用終端器３が、電力線通信装置２により送受信される通信信号が配線ダクト４の末端で反射されないよう配線ダクト４の特性インピーダンスに応じて可変キャパシタ３４によりインピーダンスを自在に変更可能なので、配線ダクト４のインピーダンス整合作業を容易にすることができ、線路長や、分岐形態、分岐数などで配線ダクト４の特性インピーダンスが変化した場合でも容易に調整することができる。   Furthermore, according to one embodiment of the present invention, the power line communication terminator 3 is variable according to the characteristic impedance of the wiring duct 4 so that communication signals transmitted and received by the power line communication device 2 are not reflected at the end of the wiring duct 4. Since the impedance can be freely changed by the capacitor 34, the impedance matching work of the wiring duct 4 can be facilitated, and even when the characteristic impedance of the wiring duct 4 changes due to the line length, branching configuration, number of branches, etc. Can be adjusted.

さらにまた、本発明の一実施形態によれば、電力線通信用終端器３が、電力線通信装置２により送受信される通信信号が配線ダクト４の末端で反射されないよう配線ダクト４の特性インピーダンスに応じて可変キャパシタ３４及び可変抵抗器３２によりインピーダンスを自在に変更可能なので、配線ダクト４のインピーダンス整合作業を容易にすることができ、線路長や、分岐形態、分岐数などで配線ダクト４の特性インピーダンスが変化した場合でも容易に調整することができる。   Furthermore, according to one embodiment of the present invention, the power line communication terminator 3 is responsive to the characteristic impedance of the wiring duct 4 so that the communication signal transmitted and received by the power line communication device 2 is not reflected at the end of the wiring duct 4. Since the impedance can be freely changed by the variable capacitor 34 and the variable resistor 32, the impedance matching work of the wiring duct 4 can be facilitated, and the characteristic impedance of the wiring duct 4 can be changed depending on the line length, the branching form, the number of branches, and the like. Even if it changes, it can be easily adjusted.

以上、本発明者によってなされた発明を適用した一実施形態について説明したが、この実施形態による開示の一部をなす論述及び図面により本発明が限定されることはない。すなわち、この実施形態に基づいて当業者によってなされる、ほかの実施形態、実施例、及び運用技術などは、本発明の範囲にすべて含まれることをつけ加えておく。   As mentioned above, although one embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure according to this embodiment. That is, it is added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

本発明が適用された電力線通信用終端器をもちいた電力線通信システムの主要構成を模式的に示す構成図である。It is a block diagram which shows typically the main structures of the power line communication system using the terminator for power line communication to which this invention was applied. 本発明が適用された電力線通信用終端器が装着される配線ダクトの内部構造を示す斜視図（ａ）及び断面図（ｂ）である。It is the perspective view (a) and sectional drawing (b) which show the internal structure of the wiring duct with which the terminator for power line communication to which this invention was applied is mounted | worn. 本発明が適用された電力線通信用終端器の外観を示す斜視図である。It is a perspective view which shows the external appearance of the terminator for power line communications to which this invention was applied. 本発明が適用された電力線通信用終端器の電気的構成（スイッチタイプ）を示す回路図である。It is a circuit diagram which shows the electric constitution (switch type) of the terminator for power line communications to which this invention was applied. 本発明が適用された電力線通信用終端器の電気的構成（可変キャパシタタイプ）を示す回路図である。It is a circuit diagram which shows the electric constitution (variable capacitor type) of the terminator for power line communications to which this invention was applied. 本発明が適用された電力線通信用終端器の電気的構成（可変抵抗器−可変キャパシタタイプ）を示す構成図である。It is a block diagram which shows the electrical structure (variable resistor-variable capacitor type) of the terminator for power line communications to which this invention was applied. 本発明が適用された電力線通信用終端器の、回転軸の配置例を示す正面図（ａ）及び側面図（ｂ）である。It is the front view (a) and side view (b) which show the example of arrangement | positioning of a rotating shaft of the terminator for power line communications to which this invention was applied.

符号の説明Explanation of symbols

１ 電力線通信システム
１ａ 電力線
１ｂ 通信ケーブル
２ 電力線通信装置
３ 電力線通信用終端器
３ａ ハウジング
３ｂ 接続支持部
３ｂ１ 電極
３ｂ２ 電極
３ｂ３ 突起
３ｂ４ 突起
３ｃ 回転軸
３ｄ 回転軸
３１ 抵抗器
３２ 可変抵抗器
３３ キャパシタ
３４ 可変キャパシタ
３５ スイッチ
４ 配線ダクト
４ａ 導体
４ｂ 導体
５ 通信機器
６ 分電盤 DESCRIPTION OF SYMBOLS 1 Power line communication system 1a Power line 1b Communication cable 2 Power line communication apparatus 3 Terminator for power line communication 3a Housing 3b Connection support part 3b1 Electrode 3b2 Electrode 3b3 Projection 3b4 Projection 3c Rotation shaft 3d Rotation shaft 31 Resistor 32 Variable resistor 33 Capacitor 34 Capacitor 35 Switch 4 Wiring duct 4a Conductor 4b Conductor 5 Communication equipment 6 Distribution board

Claims (3)

給電用の導体を内側に備えた配線ダクトと、該配線ダクトを介して通信信号を送受信する電力線通信装置とを有する電力線通信システムの電力線通信用終端器において、
並列に接続された複数の抵抗器と、
該複数の抵抗器のそれぞれに直列に接続され、当該複数の抵抗器全体の合成抵抗値を自在に切り替え可能な複数の切替手段と、
前記複数の抵抗器及び前記複数の切替手段と直列に接続されたキャパシタとを備え、
前記複数の抵抗器、前記複数の切替手段、及び前記キャパシタが前記配線ダクトの末端に導通可能に接続され、前記電力線通信装置により送受信される通信信号が前記配線ダクトの末端で反射されないようインピーダンスを自在に変更可能なことを特徴とする電力線通信用終端器。 In a power line communication terminator of a power line communication system having a wiring duct having a power supply conductor inside and a power line communication device that transmits and receives communication signals via the wiring duct,
A plurality of resistors connected in parallel;
A plurality of switching means connected in series to each of the plurality of resistors and capable of freely switching the combined resistance value of the plurality of resistors as a whole,
A capacitor connected in series with the plurality of resistors and the plurality of switching means;
The plurality of resistors, the plurality of switching means, and the capacitor are connected to the end of the wiring duct so as to be conductive, and impedance is set so that communication signals transmitted and received by the power line communication device are not reflected at the end of the wiring duct. A power line communication terminator characterized by being freely changeable. 給電用の導体を内側に備えた配線ダクトと、該配線ダクトを介して通信信号を送受信する電力線通信装置とを有する電力線通信システムの電力線通信用終端器において、
静電容量を自在に変更可能な可変キャパシタと、
該可変キャパシタと直列に接続された抵抗器とを備え、
前記可変キャパシタ及び前記抵抗器が前記配線ダクトの末端に導通可能に接続され、前記電力線通信装置により送受信される通信信号が前記配線ダクトの末端で反射されないようインピーダンスを自在に変更可能なことを特徴とする電力線通信用終端器。 In a power line communication terminator of a power line communication system having a wiring duct having a power supply conductor inside and a power line communication device that transmits and receives communication signals via the wiring duct,
A variable capacitor whose capacitance can be freely changed;
A resistor connected in series with the variable capacitor;
The variable capacitor and the resistor are conductively connected to the end of the wiring duct, and the impedance can be freely changed so that a communication signal transmitted and received by the power line communication device is not reflected at the end of the wiring duct. Power line communication terminator. 前記抵抗器が、抵抗値を自在に変更可能な可変抵抗器であることを特徴とする請求項２に記載の電力線通信用終端器。   The terminator for power line communication according to claim 2, wherein the resistor is a variable resistor whose resistance value can be freely changed.
JP2007270299A 2007-10-17 2007-10-17 Power line communication terminal equipment Pending JP2009100294A (en)

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