JP2004056766A - Wiring appliance for power line communication - Google Patents

Wiring appliance for power line communication Download PDF

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Publication number
JP2004056766A
JP2004056766A JP2003137732A JP2003137732A JP2004056766A JP 2004056766 A JP2004056766 A JP 2004056766A JP 2003137732 A JP2003137732 A JP 2003137732A JP 2003137732 A JP2003137732 A JP 2003137732A JP 2004056766 A JP2004056766 A JP 2004056766A
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Japan
Prior art keywords
power line
line communication
power
communication
wiring
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JP2003137732A
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Japanese (ja)
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JP4100248B2 (en
Inventor
Shinji Yamamoto
山本 心司
Yukio Okada
岡田 幸夫
Kenji Kuniyoshi
國吉 賢治
Yoshiyuki Komoda
薦田 美行
Takanori Shimaoka
島岡 孝憲
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring appliance for power line communication in which the power line communication using a power line is performed only by connecting a communication terminal to be used for the power line communication, power is supplied to electric equipment including the communication terminal without affecting the power line communication by the impedance of the communication terminal or electric equipment and further, the wiring construction cost is reduced since wiring of a communication path is not required. <P>SOLUTION: The wiring appliance 1 for the power line communication is provided with, at least, an impedance upper 5 of which input impedance characteristics are high with respect to at least a frequency band to be used for the power line communication and are low with respect to a commercial power supply frequency, a PLC modem 6, a coupler 7 interposed between an electric path within an appliance main body and the PLC modem 6 for cutting off the commercial power supply frequency, a consent part 4A for supplying power to electric equipment 13 while connecting the impedance upper 5 to a power source connection terminal side, and an interface part 8 for mediating the exchange of data signals between the communication terminal 11 and the PLC modem 6. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、一般オフィスや住宅等で使用される屋内電力線を用いて電力供給とデータ信号の送受信を可能にする電力線通信用配線器具に関するものである。
【0002】
【従来の技術】
一般的にオフィスでは電力を供給するための電力線の配線処理として床上の露出配線を無くすことができるフラットケーブルやVVFケーブルを使用した脱着式のものなどがアンダーカーペット配線として利用されている。また一般住宅では電力を供給するための配線処理として屋内の壁面に電力線の配線を巡らせ、電源コンセントより供給している。そしてデータ通信を行う場合にはこれらの電力供給の電力線とは別に配線した通信ケーブルを利用していた。またデータ信号を分配するHUBやルータ等が夫々設置されている。
【0003】
一方電力供給とデータ信号の搬送を同時に行い、配線システムの構築を容易にする電力線通信用コンセントが提供されている(例えば特許文献1)。
【0004】
【特許文献1】
特開平2003−60533号公報
【0005】
【発明が解決しようとする課題】
前者の従来例の場合、電力系統用の電力線とは別に情報通信系統用の通信ケーブルを配線する必要があるため、配線施工のコストが高かった。また情報通信系用通信線に接続する負荷を増設する場合や、レイアウトを変更する場合には、新たに配線系統を敷設し直す必要があった。
【0006】
また後者の従来例の場合には、各電力線通信用コンセントにパーソナルコンピュータ等を含む電気機器が複数接続された場合、電路からみた通信周波数に対するコンセント側の入力インピーダンスが低下してしまい、電力線通信用モデムで情報信号が受信できない状態になることがあった。
【0007】
本発明は、上述の点に鑑みて為されたものであって、その目的とするところは、電力線通信に用いる通信端末を接続するだけで電力線を用いた電力線通信が行え、しかも通信端末を含む電気機器の電力供給も、これらの通信端末や電気機器のインピーダンスが電力通信に影響を及ぼすことなく行え、その上通信路の配線が不要なため配線施工コストも低減できる電力線通信用配線器具を提供することにある。
【0008】
【課題を解決するための手段】
上述の目的を達成するために、本発明の請求項1に係る電力線通信用配線器具は、電力線に接続される器具本体内の電路に接続した入力端における入力インピーダンス特性が少なくとも電力線通信に用いる所定の周波数帯域に対して高く、商用電源周波数に対しては低いインピーダンスアッパと、前記電力線と前記器具本体内の電路とを介して取り込んだ電力線通信信号を受信復調する機能と電力線通信を行う通信端末からデータ信号を電力線通信信号に変調して器具本体内の電路上に送出する電力線通信用モデムと、前記器具本体内の電路と前記電力線通信用モデムの電路側接続端との間に介在し、商用電源周波数を遮断するカプラと、前記インピーダンスアッパを介して前記器具本体内の電路に電源接続端が接続されている状態で電気機器への電源供給用となる第1のコンセント部と、前記通信端末と前記電力線通信用モデムとの間の双方向のデータ信号の授受の仲介を行うインターフェース部とを少なくとも備えている。
【0009】
このような構成の電力線通信用配線器具は、インターフェース部に電力線通信に用いる通信端末を接続することで、通信端末による電力線通信が行え、しかも通信端末や電気機器の電源供給を、インピーダンスアッパを介して電路に接続される状態のコンセント部により行うことができるため、通信端末や電気機器の電源供給と同時にこれら通信端末や電気機器のインピーダンスの影響がない安定した電力線通信ができ、また電力線が通信線を兼ねるため専用の通信ケーブルの配線も不要で、配線施工のコストも低減できる。
【0010】
また、本発明の請求項2に係る電力線通信用配線器具は、請求項1に記載の電力線通信用配線器具において、前記器具本体内の電路に電源接続端が直接接続された第2のコンセント部を備えている。
【0011】
このような構成の電力線通信用配線器具は、電力線通信用モデム内蔵ACアダプタを用いる場合に、インピーダンスアッパによる影響を受けることなく、電力線通信と通信端末への電力供給が同時に行うことが可能となる。
【0012】
また、本発明の請求項3の発明に係る電力線通信用配線器具は、請求項1に記載の電力線通信用配線器具において、前記第1のコンセント部の電源接続端は、切り替えスイッチにより前記インピーダンスアッパの出力端と、前記器具本体内の電路との間で切り替え接続される。
【0013】
このような構成の電力線通信用配線器具は、一つのコンセント部を、電力線通信用モデム内蔵ACアダプタを用いて電力線通信を行う場合と電気機器への電力供給を行う場合とに使い分けが可能となる。
【0014】
また、本発明の請求項4に係る電力線通信用配線器具は、請求項1に記載の電力線通信用配線器具において、前記インピーダンスアッパは、前記所定の通信周波数帯域より高く、家庭用電気機器に対して影響を与えない周波数帯域で設定される別の通信周波数帯域に対して、入力インピーダンスが低い特性を持つものである。
【0015】
このような構成の電力線通信用配線器具は、家庭用電気機器に対して影響を与えない高い周波数帯域を用いる電力線通信を行う場合には、第1のコンセント部に当該電力線通信に対応する電力線通信用モデム内蔵ACアダプタを接続することが可能となり、しかも所定の周波数帯域で電力線通信を行う場合にも、電力線通信に影響を与えることなく電気機器の電力供給用として第1のコンセント部を使用することができる。
【0016】
また、本発明の請求項5に係る電力線通信用配線器具は、請求項1乃至4の何れかに記載の電力線通信用配線器具において、前記器具本体内の電路を電力線用として敷設されるアンダーカーペット配線システムのフロアーケーブルに直接接続する。
【0017】
このような構成の電力線通信用配線器具は、アンダーカーペット配線システムのフロアーケーブルを電力線通信に用いることができる。
【0018】
【発明の実施の形態】
以下本発明を実施形態により説明する。
(実施形態1)
図1は本実施形態の電力線通信用配線器具1の構成を示しており、本実施形態の電力線用配線器具1は器具本体(図示せず)から外部に導出した電源コード2の先端に設けた電源プラグ3を、電力線通信と電力供給とを行うために屋内配線されている電力線10に設けられた電源コンセント100に接続することで、情報通信系統用通信ケーブルを兼ねた電力線に内部の電路接続できるようなっている。
【0019】
そして前記器具本体には、図2に示すように電力線通信に用いる信号周波数帯域(例えば10kHz〜450kHz)X以上に対して高い入力インピーダンスZの特性を有するインピーダンスアッパ5を介して器具本体内の電路に接続された電源供給専用の第1のコンセント部4Bと、前記電源コード2に接続された器具本体内の電路に接続され、電力線通信用モデム(以下PLC<Power Line Communication>モデムという)内蔵ACアダプタ用として設けられた第2のコンセント部4Aと、PLCモデム6と、商用電源周波数(50/60Hz)を遮断するハイパスフィルタ機能を有し、PLCモデム6の電路接続端側と前記内部電路との間に介在するカプラ7と、PLCモデム6の通信端末側接続端に接続されハブ8と、前記インピーダンスアッパ5と前記コンセント部4Bとの間の電路から電力供給を受け、PLCモデム6及びハブ8に動作電源を供給する電源回路9とを内蔵し、コンセント部4A,4Bの各コンセント4a…,4b…の差し込み口と、ハブ8のモジュラコネクタのようなコネクタ8a…の差し込み口とを器具本体表面に夫々露出させることで電力線通信用配線器具1を構成している。
【0020】
PLCモデム6は、上述の通信周波数帯(10kHz〜450kHz)を利用して電力線上に重畳して送られてくる所定形式の電力線通信信号をカプラ7を介して受信して受信信号からデータ信号を復調する復調機能及び通信端末11側の送信データを変調して所定形式の電力線通信信号としてカプラ7を介して電路側へ送出する変調機能を備えた変復調回路60と、復調したデータ信号を所定のネットワークインターフェース(例えばイーサネット(登録商標))に対応したプロトコルでハブ8へ送り出す処理と、ハブ8を通じて前記プロトコルで送られてくるデータ信号を変復調回路60に渡すための処理とを行う制御回路61と、制御回路61で処理されるデータを一時保存するメモリとしてのバッファ62とで構成される。
【0021】
ハブ8は、前記イーサネット(登録商標)に対応したもので、通信端末11とPLCモデム6との間のデータ信号の授受と分岐とを行うインターフェース部を構成する。
【0022】
而して電力線通信に利用する電力線10に接続されているコンセント部100に電源プラグ3を接続すると、電力線10と本実施形態の電力線通信用配線器具1の器具本体内の電路とが接続され、器具本体内のPLCモデム6及びハブ8は電源回路9から動作電源の供給を受けて動作を開始する。
【0023】
これによりハブ8のコネクタ8aにパーソナルコンピュータ等の通信端末11からの通信ケーブル12の先端のモジュラプラグのようなプラグ12aを接続すれば、通信端末11は、電力線10に接続された電力線通信対応の他の通信端末やサーバ等の間で、電力線通信を利用したデータ信号の授受が行えることになる。この際通信端末11の電源はコンセント部4Bのコンセント4bに通信端末11の電源プラグを接続することで供給される。
【0024】
ここでコンセント部4Bのコンセント4b…に、前記通信端末11や家庭用電気機器を含めた電気機器13の電源プラグ14を接続すれば、電気機器13には電力線10からの商用電源の電力が本実施形態の電力線通信用配線器具1を介して供給されることになる。この場合、コンセント部4Bのコンセント4b…に夫々電気機器13が接続され、その合成インピーダンスが電力線通信に用いる通信周波数帯域に対して低インピーダンスとなっても、コンセント部4Bの前段の電路に挿入しているインピーダンスアッパ5によって、器具本体内の電路のインピーダンスが高インピーダンスに維持され、そのため電力線通信に影響を与えることがなく、安定した電力通信が行える。
【0025】
一方コンセント部4Aの前段にはインピーダンスアッパが設けられていないため、上述のようにコンセント部4Aを構成するコンセント4a…に一般の電気機器13の電源プラグ14を接続すると、複数の電気機器13の合成インピーダンスが通信周波数に対して低くなり、そのため電力線通信信号を減衰させてしまう恐れがある。
【0026】
そこで本実施形態のコンセント部4Aは、PLCモデム内蔵ACアダプタ15を用いる通信端末16の電力供給と同時に電力線通信系統の接続を行うための専用コンセント部として使用される。
【0027】
尚PLCモデム内蔵ACアダプタ15は、商用電源電圧を通信端末16に対応した直流電源電圧に変換する電源回路(図示せず)と、商用電源周波数(50/60Hz)を遮断するハイパスフィルタからなるカプラを介して電路に接続されるPLCモデム(図示せず)とを内蔵したもので、電源回路の出力は電源用ケーブル17を通じて通信端末16の電源端子に接続されて情報通信端末1に電力を供給する。一方PLCモデムは所定形式の通信インターフェース(図示せず)を備え、この通信インターフェースは通信ケーブル18を介して通信端末16の通信用端子に接続され、電力線通信によって送受信されるデータ信号を通信端末16との間で授受できるようなっている。
【0028】
以上のようにして本実施形態の電力線通信用配線器具1では、器具本体内の電路にインピーダンスアッパ5を介して接続されたコンセント部4Bを一般的な電気機器13への電力供給を行うコンセント部とすることで、電気機器13のインピーダンスが電力線通信に対して影響を及ぼすのを防ぎ、しかも電路に直接接続したコンセント部4Bを備えることで、PLCモデム内蔵ACアダプタ15を用いて通信端末16の動作電力の供給を行うと同時に電力線通信を行うことを可能としている。
【0029】
(実施形態2)
前記実施形態1では、一般的な電気機器13を接続するコンセント部4Bと、PLCモデム内蔵ACアダプタ15の接続用コンセント部4Aとを夫々設けていたが、本実施形態は、図3に示すように一つのコンセント部4と、2極の切り替えスイッチSWとを用い、切り替えスイッチSWを接点a側に切り替えることでインピーダンスアッパ5を介さずに器具本体内の電路に直接接続した状態を、また接点b側に切り替えることでコンセント部4をインピーダンスアッパ5を介して器具本体内の電路に接続した状態とを設定できるようにしたものである。つまり前者の状態ではコンセント部4は実施形態1のコンセント部4Aと同様にPLCモデム内蔵ACアダプタ15を接続するコンセント部として機能し、後者の状態ではコンセント部4Bと同様に一般の電気機器13を接続するためのコンセント部として機能することになり、ユーザの使用状況に応じて切り替えることで、コンセント部の数を減らし、電力線通信用配線器具1の小型化を可能としたものである。
【0030】
尚図中4cはコンセント部4を構成するコンセントである。またその他の構成要素は実施形態1と同じであるので、同じ構成要素には同じ符号を付して機能及び動作の説明を省略する。
(実施形態3)
本実施形態は、実施形態2と同様に一つのコンセント部4を設けたものであるが、図4に示すようにコンセント部4はインピーダンスアッパ5’を介して器具本体内の電路と接続しているものである。そして本実施形態に用いるインピーダンスアッパ5’は、図5に示すように上述の信号周波数帯域(10kHz〜450kHz)Xに対しては少なくとも高い入力インピーダンス特性を示し、更に家庭用電気機器には影響を与えない高速用の電力線通信として利用される高い周波数帯域(例えば2MHz〜30MHz)Yにおいては低入力インピーダンス特性を示すバンドパスフィルタから構成される。
【0031】
つまり、低い周波数帯域Xを用いた電力線通信を行っている場合にはコンセント部4は、一般の電気機器13の電力供給用のコンセント部として使用される。この場合、低い周波数帯域利用のPLCモデム内蔵ACアダプタ15を接続しても電路側からの電力線通信信号はインピーダンスアッパ5でブロックされて受信することはできない。
【0032】
一方高速用の周波数帯域Y内の周波数が電力線搬送に用いられる場合、電路上に重畳した電力線通信信号はインピーダンスアッパ5’を通過することができるため、高速用の周波数帯域Yに対応したPLCモデム内蔵ACアダプタ15’をコンセント部4に接続することで、通信端末16を用いた電力線通信を行うことができ、同時に通信端末16への電力供給も可能となる。
【0033】
従って、低い周波数帯域Xを利用した電力線通信を行う場合には、コンセント部4は電気機器13に電力供給を行うためのコンセント部として機能し、高速用の周波数帯域Yを利用した電力線通信を行う場合には、対応したPLCモデム内蔵ACアダプタ15’を接続して通信端末16による電力線通信を可能とするコンセント部として機能する。
【0034】
(実施形態4)
前記実施形態1乃至3の電力線通信用配線器具1は自由に持ち運びができるテーブルタップ的な構成であったが、本実施形態は、図6に示すように一般のオフィスのフラットケーブルFCを用いたアンダーカーペット配線システムに対応させたものでタイルカーペット20の下に直接敷設されたフラットケーブルFCに直接接続されるもので、図7に示すように4個のコンセント4cを有するコンセント部4と、PLCモデム6、カプラ7、電源回路9、ハブ8、インピーダンスアッパ5とを器具本体1A内に内蔵し、フラットケーブルFCと器具本体1A内の電路とを接続するための直付固定器具21を備えている。
【0035】
尚本実施形態で使用するインピーダンスアッパ5としては、電力線通信に用いる周波数が低い周波数帯域(10kHz〜450kHz)の場合には、図2に示す特性を持つものを使用し、高い周波数帯域(2MHz〜230MHz)をも利用する場合には、図5に示す特性を持つものを使用する。従って前者の場合にはコンセント部4は実施形態1のコンセント部4Bと同様に通信端末11や電気機器13への電力供給用のコンセント部として使用され、後者の場合には実施形態3のコンセント部4と同様に使用される。
【0036】
尚その他の構成要素で実施形態1と同じ構成要素には同じ符号を付す。
【0037】
而して通信端末11を用いて電力線通信を行う場合には、通信端末11の通信ケーブル12の先端に設けたモジュラジャック(図示せず)を本実施形態の電力線通信用配線器具1のハブ8のモジュラコネクタ8aに接続するとともに、通信端末11の電源ケーブル19の先端に設けた電源プラグ(図示せず)をコンセント部4のコンセント4cに接続すれば、通信端末11の通信機能によるデータ授受は、ハブ8とPLCモデム6を介してフラットケーブルFCを含む電力線を通信路とする電力線通信により行える。
【0038】
そのため電力線と通信用の専用線を別々に敷設することなく、電力線のみでデータの授受が可能となり、電力線や専用線の敷設のためのコストを大幅に削減することができる。
【0039】
また、電力線と通信線が混在することが無くなり、シンプルなシステムを構築でき、電力線通信用配線器具1の敷設される場所では、電力の供給に加えてデータの送受信も可能になるので、負荷増設やレイアウトの変更も容易となる。
【0040】
また更に、インピーダンスアッパ5をコンセント4部の前に設けたので、インピーダンスの低い一般的な電気機器13や通信端末11の電源プラグ(図示せず)がコンセント部4に接続されても、電力線搬送に影響を与えることがない。電力線通信用配線器具1をフロアーケーブルに直接接続したので、各電気機器13は、必ず電力線通信用配線器具1のインピーダンスアッパ5を通過することとなり、安全性の高い通信を行える。
【0041】
(実施形態5)
本実施形態における基本構成は実施形態4と共通するために共通する部分については同一の符号を付して説明を省略し、本実施形態の特徴となる部分についてのみ詳細に説明する。
【0042】
則ち本実施形態は、実施形態4のように、タイルカーペット20の下にフラットケーブルFCを直接敷設したアンダーカーペット配線システムではなく、図7に示すように、フリーアクセスフロアー方式のアンダーカーペット配線システムで、VVFケーブルを用いた脱着可能な分岐配線システムに、電力線通信用配線器具1を取り付けた点に特徴がある。
【0043】
この分岐配線システムは、分電盤30から延びる電力線の主線31と、主線31に予め一定の間隔で取り付けられたジョイントボックス32を介して、主線31から延びる支線33とから、電力線が構成されている。支線33はコネクタにより、ジョイントボックス32と容易に脱着可能となっている。
【0044】
本実施形態の電力線通信用配線器具1は、レイアウトの変更がない場所には、主線31に直接取り付けられ、レイアウトの変更の可能性のある場所には、支線33を介してジョイントボックス32に脱着可能に取り付けられている。
【0045】
かかる電力線通信用配線器具1においては、パソコン等の通信端末11のレイアウトの変更が生じても、支線33をジョイントボックス32から取り外し、別のジョイントボックス32に取り付けるだけで良く、容易にレイアウトの変更が可能となる。
【0046】
尚、本発明は前記各実施形態に限定されず、本発明の技術思考の範囲において、各実施形態は適宜変更されうることは明らかであり、例えば通信端末11とPLCモデム6との間のデータ授受はイーサネット(登録商標)のようなネットワークインターフェースに対応するプロトコルを用いて行っているが、USBやIEEE1394等の所定の通信規格に基づいて行うようにしても良い。
【0047】
【発明の効果】
以上説明したように、本発明に係る電力線通信用配線器具は、電力線通信に用いる通信端末を接続するだけで電力線を用いた電力線通信が行え、しかも通信端末を含む電気機器の電力供給も、これらの通信端末や電気機器のインピーダンスが電力通信に影響を及ぼすことなく行え、通信路の配線が不要なため配線施工コストも低減できる。
【図面の簡単な説明】
【図1】実施形態1の電力線通信用配線器具を示す回路構成図である。
【図2】実施形態1のインピーダンスアッパのインピーダンス特性図である。
【図3】実施形態2の電力線通信用配線器具を示す回路構成図である。
【図4】実施形態3の電力線通信用配線器具を示す回路構成図である。
【図5】実施形態3のインピーダンスアッパのインピーダンス特性図である。
【図6】実施形態4を示す説明図であり、電力線通信用配線器具がアンダーカーペット配線システムに取り付けられた状態を示す図である。
【図7】実施形態4の電力線通信用配線器具を示す回路構成図である。
【図8】実施形態5を示す説明図であり、電力線通信用配線器具がアンダーカーペット配線システムに取り付けられた状態を示す図である。
【符号の説明】
1 電力線通信用配線機器
2 電源コード
3 電源プラグ
4A,AB コンセント部
4a,4b コンセント
5 インピーダンスアッパ
6 PLCモデム
7 カプラ
8 ハブ
9 電源回路
10 電力線
11、16 通信端末
15 PLCモデム内蔵ACアダプタ
100 コンセント部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power line communication wiring device that enables power supply and data signal transmission / reception using an indoor power line used in a general office or a house.
[0002]
[Prior art]
In general, in offices, a detachable cable using a flat cable or a VVF cable that can eliminate exposed wiring on the floor is used as undercarpet wiring as wiring processing of a power line for supplying power. In a general house, as a wiring process for supplying power, a power line is routed around an indoor wall and supplied from a power outlet. When data communication is performed, a communication cable wired separately from these power supply power lines has been used. Also, a HUB, a router, and the like for distributing data signals are provided.
[0003]
On the other hand, there has been provided a power line communication outlet that simultaneously supplies power and carries a data signal, thereby facilitating the construction of a wiring system (for example, Patent Document 1).
[0004]
[Patent Document 1]
JP-A-2003-60533
[Problems to be solved by the invention]
In the case of the former conventional example, since it is necessary to wire a communication cable for the information communication system separately from the power line for the power system, the cost of wiring construction is high. In addition, when increasing the load connected to the communication line for the information communication system or when changing the layout, it is necessary to newly lay the wiring system.
[0006]
In the case of the latter conventional example, when a plurality of electric devices including a personal computer are connected to each power line communication outlet, the input impedance of the outlet side with respect to the communication frequency viewed from the electric line is reduced, and the power line communication In some cases, the modem could not receive information signals.
[0007]
The present invention has been made in view of the above points, and an object thereof is to perform power line communication using a power line simply by connecting a communication terminal used for power line communication, and further include a communication terminal. The power supply of electric equipment can be performed without the impedance of these communication terminals and electric equipment affecting the power communication, and wiring wiring for power line communication that can reduce wiring construction cost because wiring of communication path is unnecessary. Is to do.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a power line communication wiring device according to claim 1 of the present invention has an input impedance characteristic at an input terminal connected to a power path in a device main body connected to a power line at least for use in power line communication. A communication terminal for performing power line communication and a function of receiving and demodulating a power line communication signal taken in through the power line and an electric path in the appliance body, the impedance upper being high with respect to the frequency band of the power supply and the low with respect to the commercial power supply frequency. A power line communication modem that modulates a data signal into a power line communication signal and sends it out onto an electric path in the appliance body, and is interposed between an electric circuit in the appliance body and an electric circuit side connection end of the power line communication modem, An electric machine in a state where a power supply connection end is connected to an electric circuit in the appliance main body via the impedance upper and a coupler for cutting off a commercial power supply frequency; A first outlet portion serving as a power source supply to, and includes at least an interface unit for performing mediating exchange of bidirectional data signals between the communication terminal and the power line communication modem.
[0009]
In the power line communication wiring device having such a configuration, by connecting a communication terminal used for power line communication to the interface unit, power line communication can be performed by the communication terminal, and power supply to the communication terminal and the electric device is performed via the impedance upper. Power supply to communication terminals and electrical equipment, and stable power line communication without the effects of impedance of these communication terminals and electrical equipment can be performed. Since the wire also serves as a wire, wiring of a dedicated communication cable is unnecessary, and the cost of wiring can be reduced.
[0010]
The power line communication wiring device according to claim 2 of the present invention is the power line communication wiring device according to claim 1, wherein the power outlet end is directly connected to an electric path in the device main body. It has.
[0011]
With the power line communication wiring device having such a configuration, when an AC adapter with a built-in power line communication modem is used, power line communication and power supply to the communication terminal can be performed simultaneously without being affected by the impedance upper. .
[0012]
The wiring device for power line communication according to the invention of claim 3 of the present invention is the wiring device for power line communication according to claim 1, wherein a power connection end of the first outlet portion is provided by a changeover switch with the impedance upper. And an electric circuit in the instrument body.
[0013]
In the power line communication wiring device having such a configuration, one outlet portion can be selectively used for performing power line communication using an AC adapter with a built-in power line communication modem and for supplying power to an electric device. .
[0014]
In addition, the power line communication wiring device according to claim 4 of the present invention is the power line communication wiring device according to claim 1, wherein the impedance upper is higher than the predetermined communication frequency band, and It has a characteristic that the input impedance is low with respect to another communication frequency band set in a frequency band that does not affect the communication frequency.
[0015]
When the power line communication wiring device having such a configuration performs power line communication using a high frequency band that does not affect household electric devices, the power outlet communication device corresponding to the power line communication is connected to the first outlet. AC adapter with a built-in modem can be connected, and even when power line communication is performed in a predetermined frequency band, the first outlet portion is used for supplying power to electric devices without affecting power line communication. be able to.
[0016]
The power line communication wiring device according to claim 5 of the present invention is the power line communication wiring device according to any one of claims 1 to 4, wherein the undercarpet in which an electric path in the device main body is laid for a power line. Connect directly to the floor cable of the wiring system.
[0017]
With the power line communication wiring device having such a configuration, the floor cable of the undercarpet wiring system can be used for power line communication.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described with reference to embodiments.
(Embodiment 1)
FIG. 1 shows a configuration of a power line communication wiring device 1 of the present embodiment. The power line wiring device 1 of the present embodiment is provided at a tip of a power cord 2 led out from a device main body (not shown). By connecting the power plug 3 to a power outlet 100 provided on a power line 10 wired indoors for performing power line communication and power supply, an internal electric circuit connection is made to the power line also serving as a communication cable for an information communication system. I can do it.
[0019]
As shown in FIG. 2, an electric circuit in the instrument main body is provided to the instrument main body via an impedance upper 5 having a characteristic of a high input impedance Z with respect to a signal frequency band (for example, 10 kHz to 450 kHz) X or more used for power line communication. And a power supply communication modem (hereinafter referred to as PLC <Power Line Communication> modem) connected to a first outlet portion 4B dedicated to power supply connected to the power supply line and an electric circuit in the appliance main body connected to the power cord 2. A second outlet section 4A provided for an adapter, a PLC modem 6, and a high-pass filter function for cutting off a commercial power supply frequency (50/60 Hz); Connected to the communication terminal side connection end of the PLC modem 6 and the coupler 7 interposed therebetween. And a power supply circuit 9 for receiving power supply from an electric circuit between the impedance upper 5 and the outlet 4B and supplying operating power to the PLC modem 6 and the hub 8; The outlets of the outlets 4a, 4b, and the connectors 8a, such as the modular connectors of the hub 8, are exposed on the surface of the main body of the appliance, respectively, to constitute the wiring device 1 for power line communication.
[0020]
The PLC modem 6 receives, via the coupler 7, a power line communication signal of a predetermined format, which is transmitted by being superimposed on the power line using the communication frequency band (10 kHz to 450 kHz), and converts a data signal from the received signal. A modulation / demodulation circuit 60 having a demodulation function for demodulating and a modulation function for modulating transmission data on the communication terminal 11 side and transmitting it as a power line communication signal of a predetermined format to the electric circuit side via the coupler 7; A control circuit 61 for performing a process of sending out to the hub 8 by a protocol corresponding to a network interface (for example, Ethernet (registered trademark)) and a process of passing a data signal sent by the protocol to the modem 60 through the hub 8; And a buffer 62 as a memory for temporarily storing data processed by the control circuit 61.
[0021]
The hub 8 is compatible with the Ethernet (registered trademark), and constitutes an interface unit that exchanges and branches a data signal between the communication terminal 11 and the PLC modem 6.
[0022]
When the power plug 3 is connected to the outlet 100 connected to the power line 10 used for power line communication, the power line 10 is connected to the electric circuit in the main body of the power line communication wiring device 1 of the present embodiment, The PLC modem 6 and the hub 8 in the main body of the appliance receive operation power from the power supply circuit 9 and start operating.
[0023]
Thus, if a plug 12a such as a modular plug at the tip of a communication cable 12 from a communication terminal 11 such as a personal computer is connected to the connector 8a of the hub 8, the communication terminal 11 is compatible with power line communication connected to the power line 10. Data signals can be transmitted and received between other communication terminals and servers using power line communication. At this time, the power of the communication terminal 11 is supplied by connecting the power plug of the communication terminal 11 to the outlet 4b of the outlet 4B.
[0024]
Here, if the power plug 14 of the electric equipment 13 including the communication terminal 11 and the household electric equipment is connected to the outlets 4b of the outlet part 4B, the electric power of the commercial power from the power line 10 is applied to the electric equipment 13. The power is supplied via the power line communication wiring device 1 of the embodiment. In this case, even if the electrical equipment 13 is connected to each of the outlets 4b of the outlet part 4B, and the combined impedance is low with respect to the communication frequency band used for the power line communication, the electric equipment 13 is inserted into the electric circuit at the preceding stage of the outlet part 4B. Due to the impedance upper 5, the impedance of the electric circuit in the appliance body is maintained at a high impedance, so that stable power communication can be performed without affecting power line communication.
[0025]
On the other hand, since the impedance upper is not provided in front of the outlet 4A, when the power plug 14 of the general electrical equipment 13 is connected to the outlets 4a forming the outlet 4A as described above, The combined impedance becomes lower with respect to the communication frequency, which may attenuate the power line communication signal.
[0026]
Therefore, the outlet unit 4A of the present embodiment is used as a dedicated outlet unit for connecting the power line communication system simultaneously with the power supply of the communication terminal 16 using the AC adapter 15 with a built-in PLC modem.
[0027]
The AC adapter 15 with a built-in PLC modem is a coupler composed of a power supply circuit (not shown) for converting a commercial power supply voltage into a DC power supply voltage corresponding to the communication terminal 16 and a high-pass filter for cutting off the commercial power supply frequency (50/60 Hz). And a PLC modem (not shown) connected to an electric circuit via the power supply circuit. An output of the power supply circuit is connected to a power supply terminal of the communication terminal 16 through a power supply cable 17 to supply power to the information communication terminal 1. I do. On the other hand, the PLC modem is provided with a communication interface (not shown) of a predetermined format. Can be exchanged between
[0028]
As described above, in the power line communication wiring device 1 of the present embodiment, the outlet portion 4B connected to the electric circuit in the device main body via the impedance upper 5 is connected to the outlet portion for supplying power to the general electric device 13. By preventing the impedance of the electric equipment 13 from affecting the power line communication, and by providing the outlet 4B directly connected to the electric circuit, the communication terminal 16 can be connected to the communication terminal 16 using the AC adapter 15 with a built-in PLC modem. Power line communication can be performed simultaneously with supply of operating power.
[0029]
(Embodiment 2)
In the first embodiment, the outlet part 4B for connecting the general electric equipment 13 and the outlet part 4A for connection of the AC adapter 15 with a built-in PLC modem are provided respectively. However, in this embodiment, as shown in FIG. Using a single outlet unit 4 and a two-pole switch SW, the switch SW is switched to the contact a side to directly connect to the electric circuit in the instrument body without passing through the impedance upper 5, By switching to the b side, it is possible to set a state in which the outlet unit 4 is connected to the electric circuit in the appliance main body via the impedance upper 5. In other words, in the former state, the outlet unit 4 functions as an outlet unit for connecting the AC adapter 15 with a built-in PLC modem in the same manner as the outlet unit 4A of the first embodiment, and in the latter state, the general electric device 13 is used similarly to the outlet unit 4B. It functions as an outlet part for connection, and by switching according to the use condition of the user, the number of outlet parts is reduced, and the power line communication wiring device 1 can be reduced in size.
[0030]
In the figure, reference numeral 4c denotes an outlet constituting the outlet unit 4. The other components are the same as those in the first embodiment, and thus the same components are denoted by the same reference numerals and description of the functions and operations will be omitted.
(Embodiment 3)
In the present embodiment, one outlet 4 is provided as in the second embodiment. However, as shown in FIG. 4, the outlet 4 is connected to an electric circuit in the instrument body via an impedance upper 5 '. Is what it is. The impedance upper 5 ′ used in the present embodiment has at least a high input impedance characteristic with respect to the signal frequency band (10 kHz to 450 kHz) X as shown in FIG. In a high frequency band (for example, 2 MHz to 30 MHz) Y used for high-speed power line communication that is not provided, a band-pass filter having low input impedance characteristics is provided.
[0031]
That is, when power line communication using the low frequency band X is performed, the outlet unit 4 is used as an outlet unit for supplying power to the general electric device 13. In this case, even if the PLC modem built-in AC adapter 15 using a low frequency band is connected, the power line communication signal from the electric circuit side is blocked by the impedance upper 5 and cannot be received.
[0032]
On the other hand, when the frequency in the high-speed frequency band Y is used for power line carrier, the power line communication signal superimposed on the electric line can pass through the impedance upper 5 ′, so that the PLC modem corresponding to the high-speed frequency band Y is used. By connecting the built-in AC adapter 15 ′ to the outlet unit 4, power line communication using the communication terminal 16 can be performed, and power can be supplied to the communication terminal 16 at the same time.
[0033]
Therefore, when performing power line communication using the low frequency band X, the outlet unit 4 functions as an outlet unit for supplying power to the electric device 13 and performs power line communication using the high speed frequency band Y. In this case, the corresponding AC adapter 15 ′ with a built-in PLC modem is connected to function as an outlet that enables power line communication by the communication terminal 16.
[0034]
(Embodiment 4)
Although the power line communication wiring device 1 according to the first to third embodiments has a table tap-like configuration that can be freely carried, this embodiment uses a general office flat cable FC as shown in FIG. An outlet part 4 having four outlets 4c as shown in FIG. 7 and an PLC part corresponding to an undercarpet wiring system and directly connected to a flat cable FC laid directly under the tile carpet 20. A modem 6, a coupler 7, a power supply circuit 9, a hub 8, and an impedance upper 5 are incorporated in the instrument body 1A, and a direct fixing instrument 21 for connecting a flat cable FC to an electric circuit in the instrument body 1A is provided. I have.
[0035]
When the frequency used for the power line communication is in a low frequency band (10 kHz to 450 kHz), the impedance upper 5 used in the present embodiment has the characteristic shown in FIG. 2 and has a high frequency band (2 MHz to 2 kHz). In the case where 230 MHz is also used, one having the characteristics shown in FIG. 5 is used. Therefore, in the former case, the outlet unit 4 is used as an outlet unit for supplying power to the communication terminal 11 and the electric device 13 similarly to the outlet unit 4B of the first embodiment. In the latter case, the outlet unit of the third embodiment is used. Used as in 4.
[0036]
The same reference numerals are given to the same components as those of the first embodiment.
[0037]
When power line communication is performed using the communication terminal 11, a modular jack (not shown) provided at the end of the communication cable 12 of the communication terminal 11 is connected to the hub 8 of the power line communication wiring device 1 of the present embodiment. And a power plug (not shown) provided at the end of the power cable 19 of the communication terminal 11 is connected to the outlet 4c of the outlet 4, so that the data transmission / reception by the communication function of the communication terminal 11 can be performed. The power line communication can be performed by using the power line including the flat cable FC as a communication path via the hub 8 and the PLC modem 6.
[0038]
Therefore, it is possible to exchange data only with the power line without separately laying the power line and the dedicated line for communication, and it is possible to greatly reduce the cost for laying the power line and the dedicated line.
[0039]
In addition, since the power line and the communication line do not coexist, a simple system can be constructed, and in the place where the power line communication wiring device 1 is laid, data can be transmitted and received in addition to the power supply, so that the load is increased. Also, it is easy to change the layout.
[0040]
Further, since the impedance upper 5 is provided in front of the outlet 4, even if a power plug (not shown) of a general electric device 13 or a communication terminal 11 having a low impedance is connected to the outlet 4, the power line transfer is not performed. Will not be affected. Since the power line communication wiring device 1 is directly connected to the floor cable, each electric device 13 always passes through the impedance upper 5 of the power line communication wiring device 1 and can perform highly secure communication.
[0041]
(Embodiment 5)
Since the basic configuration in the present embodiment is common to that of the fourth embodiment, the same reference numerals are given to the common parts and the description thereof will be omitted, and only the characteristic parts of the present embodiment will be described in detail.
[0042]
That is, the present embodiment is not an undercarpet wiring system in which the flat cable FC is directly laid under the tile carpet 20 as in the fourth embodiment, but as shown in FIG. 7, a free access floor type undercarpet wiring system. The present invention is characterized in that the power line communication wiring device 1 is attached to a detachable branch wiring system using a VVF cable.
[0043]
In this branch wiring system, a power line is constituted by a main line 31 of a power line extending from a distribution board 30 and a branch line 33 extending from the main line 31 via a joint box 32 attached to the main line 31 at a predetermined interval. I have. The branch line 33 is easily detachable from the joint box 32 by a connector.
[0044]
The power line communication wiring device 1 of the present embodiment is directly attached to the main line 31 in a place where there is no change in the layout, and is attached to and detached from the joint box 32 through a branch line 33 in a place where the layout may be changed. Mounted as possible.
[0045]
In the power line communication wiring device 1, even if the layout of the communication terminal 11 such as a personal computer is changed, it is only necessary to remove the branch line 33 from the joint box 32 and attach it to another joint box 32. Becomes possible.
[0046]
It should be noted that the present invention is not limited to the above embodiments, and it is clear that each embodiment can be appropriately changed within the scope of the technical thinking of the present invention. For example, data between the communication terminal 11 and the PLC modem 6 The exchange is performed using a protocol corresponding to a network interface such as Ethernet (registered trademark), but may be performed based on a predetermined communication standard such as USB or IEEE1394.
[0047]
【The invention's effect】
As described above, the wiring device for power line communication according to the present invention can perform power line communication using a power line simply by connecting a communication terminal used for power line communication, and also supplies power to an electric device including the communication terminal. In this case, the impedance of the communication terminal or the electric device can be performed without affecting the power communication, and wiring of the communication path is unnecessary, so that the wiring construction cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a circuit configuration diagram illustrating a power line communication wiring device according to a first embodiment.
FIG. 2 is an impedance characteristic diagram of the impedance upper according to the first embodiment.
FIG. 3 is a circuit configuration diagram illustrating a power line communication wiring device according to a second embodiment.
FIG. 4 is a circuit diagram illustrating a power line communication wiring device according to a third embodiment.
FIG. 5 is an impedance characteristic diagram of the impedance upper according to the third embodiment.
FIG. 6 is an explanatory diagram showing the fourth embodiment, and is a diagram showing a state in which a power line communication wiring device is attached to an undercarpet wiring system.
FIG. 7 is a circuit configuration diagram illustrating a power line communication wiring device according to a fourth embodiment.
FIG. 8 is an explanatory diagram showing the fifth embodiment, and is a diagram showing a state in which the power line communication wiring device is attached to the undercarpet wiring system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Power line communication wiring device 2 Power cord 3 Power plug 4A, AB Outlet part 4a, 4b Outlet part 5 Impedance upper 6 PLC modem 7 Coupler 8 Hub 9 Power supply circuit 10 Power line 11, 16 Communication terminal 15 PLC modem built-in AC adapter 100 Outlet part

Claims (5)

電力線に接続される器具本体内の電路に接続した入力端における入力インピーダンス特性が少なくとも電力線通信に用いる所定の周波数帯域に対して高く、商用電源周波数に対しては低いインピーダンスアッパと、
前記電力線と前記器具本体内の電路とを介して取り込んだ電力線通信信号を受信復調する機能と電力線通信を行う通信端末からデータ信号を電力線通信信号に変調して器具本体内の電路上に送出する電力線通信用モデムと、
前記器具本体内の電路と前記電力線通信用モデムの電路側接続端との間に介在し、商用電源周波数を遮断するカプラと、
前記インピーダンスアッパを介して前記器具本体内の電路に電源接続端が接続されている状態で電気機器への電源供給用となる第1のコンセント部と、
前記通信端末と前記電力線通信用モデムとの間の双方向のデータ信号の授受の仲介を行うインターフェース部とを少なくとも備えたことを特徴とする電力線通信用配線器具。
An input impedance characteristic at an input end connected to an electric path in the appliance body connected to the power line is high for at least a predetermined frequency band used for power line communication, and is low for a commercial power supply frequency;
A function of receiving and demodulating a power line communication signal taken in through the power line and the electric circuit in the appliance body, and a data signal from a communication terminal performing power line communication is modulated into a power line communication signal and transmitted onto an electric circuit in the appliance body. A power line communication modem,
A coupler that is interposed between an electric circuit in the appliance main body and an electric circuit side connection end of the power line communication modem, and shuts off a commercial power frequency.
A first outlet portion for supplying power to an electric device in a state where a power connection end is connected to an electric circuit in the appliance main body via the impedance upper,
A wiring device for power line communication, comprising at least an interface unit for mediating transmission and reception of bidirectional data signals between the communication terminal and the power line communication modem.
前記器具本体内の電路に電源接続端が直接接続された第2のコンセント部を備えていることを特徴とする請求項1に記載の電力線通信用配線器具。2. The power line communication wiring device according to claim 1, further comprising a second outlet having a power connection end directly connected to an electric circuit in the device main body. 3. 前記第1のコンセント部の電源接続端は、切り替えスイッチにより前記インピーダンスアッパの出力端と、前記器具本体内の電路との間で切り替え接続されることを特徴とする請求項1記載の電力線通信用配線器具。2. The power line communication terminal according to claim 1, wherein a power connection end of the first outlet unit is switched between an output end of the impedance upper and an electric path in the appliance body by a changeover switch. 3. Wiring equipment. 前記インピーダンスアッパは、前記所定の通信周波数帯域より高く、家庭用電気機器に対して影響を与えない周波数帯域で設定される別の通信周波数帯域に対して、入力インピーダンスが低い特性を持つものであることを特徴とする請求項1記載の電力線通信用配線器具。The impedance upper has a characteristic that an input impedance is low with respect to another communication frequency band which is higher than the predetermined communication frequency band and which is set in a frequency band which does not affect household electric appliances. The wiring device for power line communication according to claim 1, wherein: 前記器具本体内の電路を、電力線用として敷設されるアンダーカーペット配線システムのフロアーケーブルに直接接続することを特徴とする請求項1乃至4の何れか記載の電力線通信用配線器具。The power line communication wiring device according to any one of claims 1 to 4, wherein an electric circuit in the device main body is directly connected to a floor cable of an undercarpet wiring system laid for power lines.
JP2003137732A 2002-05-28 2003-05-15 Power line communication wiring equipment Expired - Fee Related JP4100248B2 (en)

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