JP5231566B2 - 圧力センサ - Google Patents
圧力センサ Download PDFInfo
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- JP5231566B2 JP5231566B2 JP2010533196A JP2010533196A JP5231566B2 JP 5231566 B2 JP5231566 B2 JP 5231566B2 JP 2010533196 A JP2010533196 A JP 2010533196A JP 2010533196 A JP2010533196 A JP 2010533196A JP 5231566 B2 JP5231566 B2 JP 5231566B2
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- pressure sensor
- vertical beam
- flexible diaphragm
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
- G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
- G01L13/025—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/38—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule
- G01F1/383—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule with electrical or electro-mechanical indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0072—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
Description
工業プロセス環境において非常に有用になってきた一つの装置が、圧力トランスミッタである。圧力トランスミッタは、プロセス容器内の流体圧力を検出して、その圧力を示す電気信号を制御システムに提供する装置である。一般的に、圧力トランスミッタは、差圧または管路の圧力を測定できる圧力センサを有する。差圧は、二つの圧力ポートの間の圧力の差である。管路の圧力は、その圧力ポートのいずれか一つの圧力である。いくつかの場合において、圧力センサは、そこに加えられる圧力に応じて撓む可撓性ダイヤフラムを含み、そのダイヤフラムの上、またはそれに取り付けられ、ダイヤフラムの撓みおよびそれによる圧力に応じてその電気的特性が変動する電気的構造体を有する。静電容量式圧力センサを用いる圧力トランスミッタは、一般的に圧力センサの静電容量値を増加させてセンサ分解能を増加させる誘電性充填流体で充填される。しかしながら、このようなセンサが漏れを起こした場合には、シリコーンオイルである場合もある誘電性充填流体がシステムに流出し、それによって、生成物またはプロセス流体自体を汚染する。
【先行技術文献】
【特許文献】
【特許文献1】 特表2003−522942号公報
図1は、清浄プロセス設備において動作する差圧トランスミッタの概略図である。差圧トランスミッタ10は、一対のプロセス流体圧力導管またはタップ14,16を介してプロセス流体容器(配管12として概略的に図示される)に動作可能に結合する。各タップ14および16は、配管12を通るプロセス流体の流れをある程度狭窄する、流れ狭窄部18の両側に配置され、それによってプロセス流体の流量に関連する、狭窄部18を跨ぐ差圧を生成する。配管として概略的に図示されているが、プロセス流体容器12は、プロセス流体を保存および/または運搬可能な任意の適切なプロセス容器であることができる。加えて、本明細書で用いられるプロセス流体としては、任意のプロセス気体または液体を意味することを意図している。差圧トランスミッタ10は流れ狭窄部18の両側に結合する差圧ポートを有するように図示されているが、差圧トランスミッタのさまざまな他の使用も考慮される。
Claims (12)
- 一対のプロセス流体圧力ポートであって、各ポートが、プロセス流体への露出に適合する可撓性ダイヤフラムを有し、第1の可撓性ダイヤフラムが第1の垂直ビーム部に結合し、第2の可撓性ダイヤフラムが第2の垂直ビーム部に結合するポートと、
各垂直ビーム部に個別に結合する片持ちビーム部と、
圧力センサ内に配置され、各プロセス流体ポート間の差圧によって変動する静電容量値を有する第1可変コンデンサであって、少なくとも一方の可撓性ダイヤフラムに少なくとも一方の垂直ビーム部を介して動作可能に結合する少なくとも一つの静電容量プレートによって形成される第1可変コンデンサと、
圧力センサ内に配置され、管路の圧力によって変動する静電容量値を有する第2可変コンデンサであって、少なくとも一方の可撓性ダイヤフラムに少なくとも一方の垂直ビーム部を介して動作可能に結合する少なくとも一つの静電容量プレートによって形成される第2可変コンデンサと
を含む、圧力センサ。 - 一対の可撓性ダイヤフラムが、互いに軸方向に整列している、請求項1記載の圧力センサ。
- 可撓性ダイヤフラムが、ソリッドな支柱によって互いに結合する、請求項2記載の圧力センサ。
- 一対の可撓性ダイヤフラムが、実質的に同じ平面に配置される、請求項1記載の圧力センサ。
- 可撓性ダイヤフラムが、ソリッドな支柱によって互いに結合する、請求項1記載の圧力センサ。
- 支柱が、過圧撓みを抑制するように構成されるフランジを含む、請求項5記載の圧力センサ。
- 各可撓性ダイヤフラムがそれぞれ垂直ビームに結合しており、横ビームが、そこに従属するパドル部材を有する垂直ビームに跨り、パドル部材が複数の静電容量プレートを有し、各静電容量プレートが異なる可変コンデンサの一部を形成する、請求項1記載の圧力センサ。
- 一対のプロセス流体圧力ポート間の差圧の変化が、パドル部材の回転を生成する、請求項7記載の圧力センサ。
- 各可撓性ダイヤフラムがそれぞれ垂直ビームおよび片持ちビーム部に結合し、各片持ちビーム部が、それぞれ、静電容量プレートを有する傾斜部に結合してその静電容量プレートは傾斜部上に配置され、傾斜部上の静電容量プレートが第1可変コンデンサを形成し、少なくとも一つの片持ちビーム部が、底面に配置される追加の静電容量プレートを有し、可撓性ダイヤフラムに隣接して配置される固定された静電容量プレートと協働して第2可変コンデンサを形成する、請求項1記載の圧力センサ。
- 各可撓性ダイヤフラムがそれぞれ垂直ビームおよび片持ちビーム部に結合し、各片持ちビーム部が下面に静電容量プレートを有するものであって、
一方の垂直ビームが他方の垂直ビームより短いため、片持ちビーム部が互いに重なるものであって、
短い方の垂直ビームに結合する片持ちビーム部が、その上面に静電容量プレートを有して、他方の片持ちビーム部上の静電容量プレートと協働して、第1可変コンデンサを形成し、
静電容量プレートが、可撓性ダイヤフラムに隣接して固定的に搭載されて、短い方の垂直ビームに取り付けられた片持ちビーム部の下面の静電容量プレートと協働して、第2可変コンデンサを形成する、請求項1記載の圧力センサ。 - 請求項1に記載の圧力センサと、
プロセス通信ループに結合可能であって、ループを介して通信するように構成されるループ通信機と、
ループ通信機に結合するコントローラと、
プロセス通信ループを介して、差圧および管路の圧力の表示のうち少なくとも一方を提供するために、コントローラおよび圧力センサに結合する測定回路と
を含む、圧力トランスミッタ。 - プロセス通信ループに結合可能であって、プロセス通信ループから受けるエネルギによって圧力トランスミッタに全面的に電力供給するように構成される、電力モジュールをさらに含む、請求項11記載の圧力トランスミッタ。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/983,414 US7779698B2 (en) | 2007-11-08 | 2007-11-08 | Pressure sensor |
US11/983,414 | 2007-11-08 | ||
PCT/US2008/082430 WO2009061782A2 (en) | 2007-11-08 | 2008-11-05 | Pressure sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011503576A JP2011503576A (ja) | 2011-01-27 |
JP5231566B2 true JP5231566B2 (ja) | 2013-07-10 |
Family
ID=40419038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010533196A Active JP5231566B2 (ja) | 2007-11-08 | 2008-11-05 | 圧力センサ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7779698B2 (ja) |
EP (1) | EP2208035B1 (ja) |
JP (1) | JP5231566B2 (ja) |
CN (1) | CN101849170B (ja) |
WO (1) | WO2009061782A2 (ja) |
Families Citing this family (13)
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EP2340428A1 (en) * | 2008-04-18 | 2011-07-06 | Socovar Societe En Commandite | System for sensing and displaying softness and force |
US8429978B2 (en) | 2010-03-30 | 2013-04-30 | Rosemount Inc. | Resonant frequency based pressure sensor |
US8234927B2 (en) * | 2010-06-08 | 2012-08-07 | Rosemount Inc. | Differential pressure sensor with line pressure measurement |
DE102014200500A1 (de) * | 2014-01-14 | 2015-07-16 | Robert Bosch Gmbh | Mikromechanische Drucksensorvorrichtung und entsprechendes Herstellungsverfahren |
FR3018916B1 (fr) * | 2014-03-19 | 2017-08-25 | Commissariat Energie Atomique | Capteur de mesure de pression differentielle microelectromecanique et/ou nanoelectromecanique |
EP3127158B1 (en) * | 2014-04-04 | 2019-06-12 | Robert Bosch GmbH | Membrane-based sensor and method for robust manufacture of a membrane-based sensor |
JP6396868B2 (ja) * | 2015-09-02 | 2018-09-26 | 長野計器株式会社 | 物理量測定装置 |
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WO2001059419A1 (en) * | 2000-02-11 | 2001-08-16 | Rosemount Inc. | Optical pressure sensor |
US6782754B1 (en) * | 2000-07-07 | 2004-08-31 | Rosemount, Inc. | Pressure transmitter for clean environments |
JP2006208225A (ja) * | 2005-01-28 | 2006-08-10 | Nippon M K S Kk | 差圧センサー |
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2007
- 2007-11-08 US US11/983,414 patent/US7779698B2/en active Active
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2008
- 2008-11-05 JP JP2010533196A patent/JP5231566B2/ja active Active
- 2008-11-05 WO PCT/US2008/082430 patent/WO2009061782A2/en active Application Filing
- 2008-11-05 EP EP08846363.3A patent/EP2208035B1/en active Active
- 2008-11-05 CN CN200880114596.0A patent/CN101849170B/zh active Active
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EP2208035B1 (en) | 2013-07-31 |
EP2208035A2 (en) | 2010-07-21 |
US7779698B2 (en) | 2010-08-24 |
CN101849170B (zh) | 2014-09-10 |
WO2009061782A2 (en) | 2009-05-14 |
WO2009061782A3 (en) | 2009-07-30 |
CN101849170A (zh) | 2010-09-29 |
US20090120195A1 (en) | 2009-05-14 |
JP2011503576A (ja) | 2011-01-27 |
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