JP2007531159A - Can出力を絶縁した2線式トランスミッタ - Google Patents
Can出力を絶縁した2線式トランスミッタ Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/245—Housings for sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
Description
プロセス変量を感知し、そのプロセス変量の大きさを表す電気出力を発するためにプロセス変量トランスミッタが使用される。プロセス変量トランスミッタ中の電子及びセンサ部品がますます小型化され、より多くの機能がトランスミッタに追加されるにつれ、トランスミッタ内の回路は非常に密に実装されるようになり、トランスミッタに対して内部的な新たな電力管理、ノイズ及び干渉問題を招くようになる。
開示されるものは、双方向HART及びコントローラエリアネットワーク通信トランシーバラインを提供するトランスミッタ出力回路を含むプロセス変量トランスミッタである。トランスミッタ出力回路はまた、センサ回路インタフェース接点を含む。
以下に説明する実施態様では、CANトランシーバラインを備えたプロセス変量トランスミッタ中の高密度回路における電力管理、ノイズ及び干渉に伴う問題が軽減される。低レベルセンサ回路がプロセスアースに対して照合され、センサ回路とHART及びコントローラエリアネットワーク(CAN)トランシーバラインとの間にガルバニック絶縁バリヤが設けられる。HART及びCANトランシーバラインは、ノイズを低レベルセンサ回路に効果的に結合することができず、トランスミッタは、コンパクトなトランスミッタを作るために、小型化された部品を利用することができる。
Claims (27)
- 双方向HART及びコントローラエリアネットワーク通信トランシーバラインならびにセンサ回路インタフェース接点を提供するトランスミッタ出力回路と、
センサ回路インタフェース接点に結合され、プロセス変量を感知するセンサ回路を含み、さらに、センサ回路をHART及びコントローラエリアネットワークトランシーバラインからガルバニックに絶縁するガルバニック絶縁バリヤを含む絶縁回路と
を含むプロセス変量トランスミッタ。 - センサ回路が第一及び第二の低レベル電源導体を含み、第一及び第二の低レベル電源導体の間の電圧差が5.5ボルト以下である、請求項1記載のプロセス変量トランスミッタ。
- センサ回路を包囲し、第一の低レベル電源導体に接続された静電シールドをさらに含む、請求項2記載のプロセス変量トランスミッタ。
- 静電シールドに電気的に接続されているプロセス流体入口を含む、請求項3記載のプロセス変量トランスミッタ。
- 静電シールドが、プロセスアースに接続可能である端子をトランスミッタの外面に含む、請求項3記載のプロセス変量トランスミッタ。
- 絶縁回路が、絶縁バリヤの第一の部分を含むガルバニックに絶縁された電源を含む、請求項1記載のプロセス変量トランスミッタ。
- ガルバニックに絶縁された電源が、互いに電気的に絶縁されている第一及び第二の変圧器巻線を含む変圧器を含む、請求項6記載のプロセス変量トランスミッタ。
- 絶縁回路が、絶縁バリヤの第二の部分を含むガルバニックに絶縁されたシリアル双方向通信回路をさらに含む、請求項6記載のプロセス変量トランスミッタ。
- ガルバニックに絶縁されたシリアル双方向通信回路が絶縁変圧器を含む、請求項8記載のプロセス変量トランスミッタ。
- ガルバニックに絶縁されたシリアル双方向通信回路が光アイソレータを含む、請求項8記載のプロセス変量トランスミッタ。
- ループ電流を制御するトランスミッタであって、
トランスミッタ中で第一、第二、第三及び第四の電流を含むループ電流を運ぶ正及び負のリードと、
第一の電流を運ぶ抵抗器を含み、プロセス変量及び抵抗器における感知電圧の両方の関数として第一の電流を制御するループ電流コントローラと、
正のリードに結合し、第一の電圧を提供し、第二の電流を抵抗器を介して結合する第一の調整器と、
第一の電圧に結合し、第二の電圧を提供し、第三の電流を抵抗器を介して結合する第二の調整器と、
第一の電圧と第二の電圧との間に第一の負荷電流を運ぶ第一の負荷と、
コントローラエリアネットワーク負荷を含み、抵抗器をバイパスする第二の負荷電流を第二の電圧と負のリードとの間に結合する第二の負荷と
を含み、
ループ電流コントローラが第二の電圧を感知して、抵抗器をバイパスする負荷電流に関して第一の電流を補正するトランスミッタ。 - 第一及び第二の負荷が電気的直列回路に積み重ねられ、第一の負荷電流の少なくとも一部が第二の負荷を通過する、請求項11記載のトランスミッタ。
- 第一の負荷電流と第二の負荷電流との合計がループ電流の下限を超える、請求項11記載のトランスミッタ。
- 第一及び第二の負荷が、ループ電流の供給特性に適合しない負荷特性を有する、請求項11記載のトランスミッタ。
- ループ電流コントローラが、ループ電流がプロセス変量を示すようにフィードバックに基づいて第一の電流を制御する、請求項11記載のトランスミッタ。
- ループに接続可能なプロセス変量トランスミッタであって、
CANバス接点及びコモン接点を含むコントローラエリアネットワーク出力接続と、
供給電流を引き出し、蓄積エネルギー出力を提供し、供給電流限界を提供する電流リミッタ回路と、
蓄積エネルギー出力から駆動電流を引き出し、駆動電流をCANバス接点に結合し、駆動電流限界を提供する劣性ドライバ回路と、
CANバスに結合された優性ドライバ回路と
を含むプロセス変量トランスミッタ。 - 電流リミッタ回路がバルクコンデンサを含む、請求項16記載のプロセス変量トランスミッタ。
- 供給電流限界が、電流ループの機能を乱さないように設定されている、請求項16記載のプロセス変量トランスミッタ。
- 第一の電源レールによって給電されるマイクロコントローラと、
マイクロコントローラから受けたコントローラエリアネットワークコンフィギュレーションデータを記憶するEEPROM回路と、
第二の電源レールによって給電され、マイクロコントローラからコントローラエリアネットワークコンフィギュレーションデータを受けるコントローラエリアネットワーク回路と
を含み、給電が断たれたとき、第二の電源レールの給電の前に第一の電源レールの給電が落ちるように順序付けされているプロセス変量トランスミッタ。 - トランスミッタが給電されたとき、第二の電源レールの前に第一の電源レールが給電される、請求項19記載のプロセス変量トランスミッタ。
- 第一の電源レールが、スパイクを減結合するためのRC型ローパスフィルタを含む、請求項20記載のプロセス変量トランスミッタ。
- コントローラエリアネットワーク回路が、ローカルオペレータインタフェースのキーが押されたときCAN通信を中断するKEYS回路を含む、請求項19記載のプロセス変量トランスミッタ。
- 起動時、コントローラエリアネットワーク回路の前にマイクロコントローラが給電される、請求項19記載のプロセス変量トランスミッタ。
- 停止時、コントローラエリアネットワーク回路が給電を停止された後もマイクロコントローラが給電され続ける、請求項23記載のプロセス変量トランスミッタ。
- マイクロコントローラと、
マイクロコントローラに結合され、外部CANバスに電流を提供するコントローラエリアネットワークと、
コントローラエリアネットワーク回路に結合され、外部CANバスへの電流を感知し、電流が設定限界を超えていることを指示する診断出力をコントローラに提供する診断回路と
を含むプロセス変量トランスミッタ。 - 診断回路が、コントローラエリアネットワーク回路に結合されたエミッタ及び診断出力に接続されたコレクタを有するトランジスタを含む、請求項25記載のプロセス変量トランスミッタ。
- 診断回路が、コレクタとDCコモンとの間に結合する抵抗器をさらに含む、請求項26記載のプロセス変量トランスミッタ。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/812,192 US7773715B2 (en) | 2002-09-06 | 2004-03-29 | Two wire transmitter with isolated can output |
US10/812,192 | 2004-03-29 | ||
PCT/US2005/007328 WO2005104056A2 (en) | 2004-03-29 | 2005-03-07 | Two wire transmitter with isolated can output |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007531159A true JP2007531159A (ja) | 2007-11-01 |
JP4926041B2 JP4926041B2 (ja) | 2012-05-09 |
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007506193A Expired - Fee Related JP4926041B2 (ja) | 2004-03-29 | 2005-03-07 | Can出力を絶縁した2線式トランスミッタ |
Country Status (6)
Country | Link |
---|---|
US (2) | US7773715B2 (ja) |
EP (1) | EP1733365A2 (ja) |
JP (1) | JP4926041B2 (ja) |
CN (2) | CN1938734A (ja) |
RU (1) | RU2338262C2 (ja) |
WO (1) | WO2005104056A2 (ja) |
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- 2005-03-07 RU RU2006138032/09A patent/RU2338262C2/ru not_active IP Right Cessation
- 2005-03-07 CN CNA2005800100704A patent/CN1938734A/zh active Pending
- 2005-03-07 JP JP2007506193A patent/JP4926041B2/ja not_active Expired - Fee Related
- 2005-03-07 CN CN201310330106.3A patent/CN103471637B/zh active Active
- 2005-03-07 WO PCT/US2005/007328 patent/WO2005104056A2/en active Application Filing
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2015500494A (ja) * | 2011-12-15 | 2015-01-05 | ヴァレオ システム ドゥ コントロール モトゥール | 温度測定方法 |
US10240987B2 (en) | 2011-12-15 | 2019-03-26 | Valeo Systemes De Controle Moteur | Temperature measurement method |
Also Published As
Publication number | Publication date |
---|---|
RU2338262C2 (ru) | 2008-11-10 |
US8208581B2 (en) | 2012-06-26 |
EP1733365A2 (en) | 2006-12-20 |
WO2005104056A2 (en) | 2005-11-03 |
WO2005104056A3 (en) | 2006-03-16 |
US20040184517A1 (en) | 2004-09-23 |
US20100299542A1 (en) | 2010-11-25 |
CN103471637B (zh) | 2016-08-10 |
JP4926041B2 (ja) | 2012-05-09 |
RU2006138032A (ru) | 2008-05-10 |
CN1938734A (zh) | 2007-03-28 |
US7773715B2 (en) | 2010-08-10 |
CN103471637A (zh) | 2013-12-25 |
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