JPH07507391A - 圧力トランスジューサの補正装置 - Google Patents
圧力トランスジューサの補正装置Info
- Publication number
- JPH07507391A JPH07507391A JP6500599A JP50059994A JPH07507391A JP H07507391 A JPH07507391 A JP H07507391A JP 6500599 A JP6500599 A JP 6500599A JP 50059994 A JP50059994 A JP 50059994A JP H07507391 A JPH07507391 A JP H07507391A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- impedance
- sensing means
- changes
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/02—Arrangements for preventing, or for compensating for, effects of inclination or acceleration of the measuring device; Zero-setting means
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- 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
- G01L9/02—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 by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/06—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 by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices
- G01L9/065—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 by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices with temperature compensating means
-
- 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
- G01L9/12—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 by making use of variations in capacitance, i.e. electric circuits therefor
- G01L9/125—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 by making use of variations in capacitance, i.e. electric circuits therefor with temperature compensating means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
Abstract
Description
Claims (10)
- (1)それぞれが、圧力および予め決められた環境条件によって変化するインピ ーダンス値を有する、少なくとも第1および第2の感知手段よりなる圧力センサ と、前記の予め決められた環境条件の変化によっては実質上変化しないインピー ダンス値を有するインピーダンス手段と、前記インピーダンス手段を前記第1お よび第2感知手段と順次に、かつ交互に作動関係に接続する接続手段とを具備し 、前記センサおよびインピーダンス手段は、インピーダンス手段の第1および第 2感知手段との各交互接続の間に、圧力および前記予め決められた環境条件の関 数であるような第1および第2信号を発生し、 さらに、前記第1および第2信号に応答して前記予め決められた環境条件の変動 に対する圧力表示を補正する補正手段を具備した圧力測定装置。
- (2)圧力センサは差圧を測定し、第1および第2信号は差圧およびライン圧の 関数であり、インピーダンス手段はライン圧の変化によっては事実上変化しない インピーダンス値を有し、補正手段はライン圧の変動に対して差圧値を補正する 請求項1に記載の装置。
- (3)前記圧力センサは容量式圧力センサであり、第1の圧力センサの容量はC 1、第2の圧力センサの容量はC2であり、前記容量C1、C2は圧力に応じて 変化し、前記インピーダンス手段は容量CLを有するコンデンサ手段よりなり、 前記補正手段はCL/(C1+C2)に基づいて差圧値を補正する請求項2に記 載の装置。
- (4)前記コンデンサ手段は第1および第2のコンデンサよりなり、前記接続手 段は前記第1コンデンサを前記第1圧力感知手段に、また前記第2コンデンサを 前記第2圧力感知手段に交互に接続する請求項3に記載の装置。
- (5)第1圧力感知手段は、差圧に対して第1の態様で変化する抵抗値を有する 第1のピエゾ抵抗圧力感知手段であり、第2圧力感知手段は、差圧に対して第2 の態様で変化する抵抗値を有する第2のピエゾ抵抗圧力感知手段であり、前記第 1および第2の態様は互いに異なる請求項2に記載の装置。
- (6)圧力センサは差圧を測定し、第1および第2信号は差圧および温度の関数 であり、前記インピーダンス手段は温度変化によっては事実上変化しないインピ ーダンス値を有し、前記補正手段は温度の変化に対して差圧値を補正する請求項 1に記載の装置。
- (7)前記圧力センサは容量式圧力センサであり、第1の圧力感知手段の容量は C1、第2の圧力感知手段の容量はC2であり、前記容量C1、C2は圧力に応 じて変化し、前記インピーダンス手段は容量CLを有するコンデンサ手段よりな り、前記補正手段はCL/(C1+C2)に基づいて差圧値を補正する請求項6 に記載の装置。
- (8)第1圧力感知手段は、圧力に応じて第1の態様で変化する抵抗値を有する 第1のピエゾ抵抗圧力感知手段であり、第2圧力感知手段は、圧力に応じて第2 の態様で変化する抵抗値を有する第2のピエゾ抵抗圧力感知手段であり、前記第 1および第2の変化態様は互いに異なり、前記第1および第2ピエゾ抵抗圧力感 知手段はそれぞれ既知の温度係数を有し、前記インピーダンス手段は、前記第1 および第2ピエゾ抵抗圧力感知手段の温度係数とは異なる温度係数を有する抵抗 よりなる請求項6に記載の装置。
- (9)圧力センサはライン圧を測定し、第1および第2感知手段のインピーダン ス値はライン圧に応じて、違った態様で変化すると共に、温度でも変化し、第1 および第2信号はライン圧および温度の関数であり、インピニダンス手段は温度 変化によっては事実上変化しないインピーダンス値を有し、補正手段は温度変化 に対してライン圧値を補正する請求項1に記載の装置。
- (10)前記インピーダンス手段は第1および第2のインピーダンスよりなり、 前記接続手段は、前記第1インピーダンスを前記第1感知手段に、また前記第2 インピーダンスを前記第2感知手段に、交互に接続する請求項1に記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/890,627 US5329818A (en) | 1992-05-28 | 1992-05-28 | Correction of a pressure indication in a pressure transducer due to variations of an environmental condition |
US890,627 | 1992-05-28 | ||
PCT/US1993/004673 WO1993024818A2 (en) | 1992-05-28 | 1993-05-17 | Correction for a pressure transducer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07507391A true JPH07507391A (ja) | 1995-08-10 |
JP3247379B2 JP3247379B2 (ja) | 2002-01-15 |
Family
ID=25396915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50059994A Expired - Fee Related JP3247379B2 (ja) | 1992-05-28 | 1993-05-17 | 圧力トランスジューサの補正装置 |
Country Status (9)
Country | Link |
---|---|
US (1) | US5329818A (ja) |
EP (1) | EP0642658B1 (ja) |
JP (1) | JP3247379B2 (ja) |
CN (1) | CN1053499C (ja) |
CA (1) | CA2133732A1 (ja) |
DE (1) | DE69319430T2 (ja) |
MX (1) | MX9303098A (ja) |
RU (1) | RU2139509C1 (ja) |
WO (1) | WO1993024818A2 (ja) |
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JPS56129831A (en) * | 1980-03-17 | 1981-10-12 | Yokogawa Hokushin Electric Corp | Pressure converter |
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US4381677A (en) * | 1981-01-23 | 1983-05-03 | Rosemount Inc. | Reactance measurement circuit |
US4370891A (en) * | 1981-05-26 | 1983-02-01 | Caterpillar Tractor Co. | Dual element-single oscillator-ratio type digital transducer |
US4449409A (en) * | 1981-07-13 | 1984-05-22 | The Bendix Corporation | Pressure measurement system with a constant settlement time |
US4598381A (en) * | 1983-03-24 | 1986-07-01 | Rosemount Inc. | Pressure compensated differential pressure sensor and method |
JP2579143B2 (ja) * | 1984-02-02 | 1997-02-05 | ハネウエル・インコーポレーテッド | プロセス変数センサのディジタル補正の方法およびそのためのプロセス変数発信器 |
US4625560A (en) * | 1985-05-13 | 1986-12-02 | The Scott & Fetzer Company | Capacitive digital integrated circuit pressure transducer |
US5083091A (en) * | 1986-04-23 | 1992-01-21 | Rosemount, Inc. | Charged balanced feedback measurement circuit |
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US4791352A (en) * | 1986-07-17 | 1988-12-13 | Rosemount Inc. | Transmitter with vernier measurement |
US4741214A (en) * | 1986-09-19 | 1988-05-03 | Combustion Engineering, Inc. | Capacitive transducer with static compensation |
US4765188A (en) * | 1986-11-24 | 1988-08-23 | Bourns Instruments, Inc. | Pressure transducer with integral digital temperature compensation |
JP2544435B2 (ja) * | 1988-04-06 | 1996-10-16 | 株式会社日立製作所 | 多機能センサ |
US4876892A (en) * | 1988-04-19 | 1989-10-31 | Allied-Signal Inc. | Pressure sensor |
US4878012A (en) * | 1988-06-10 | 1989-10-31 | Rosemount Inc. | Charge balanced feedback transmitter |
DE3925579A1 (de) * | 1989-08-02 | 1991-02-07 | Vdo Schindling | Schaltungsanordnung fuer einen differentialkondensator |
JPH06132145A (ja) * | 1992-02-03 | 1994-05-13 | Origin Electric Co Ltd | エックス線管用フィラメントトランス |
US5329818A (en) * | 1992-05-28 | 1994-07-19 | Rosemount Inc. | Correction of a pressure indication in a pressure transducer due to variations of an environmental condition |
-
1992
- 1992-05-28 US US07/890,627 patent/US5329818A/en not_active Expired - Lifetime
-
1993
- 1993-05-17 RU RU94046114A patent/RU2139509C1/ru active
- 1993-05-17 DE DE69319430T patent/DE69319430T2/de not_active Expired - Lifetime
- 1993-05-17 JP JP50059994A patent/JP3247379B2/ja not_active Expired - Fee Related
- 1993-05-17 WO PCT/US1993/004673 patent/WO1993024818A2/en active IP Right Grant
- 1993-05-17 EP EP93913940A patent/EP0642658B1/en not_active Expired - Lifetime
- 1993-05-17 CA CA002133732A patent/CA2133732A1/en not_active Abandoned
- 1993-05-26 MX MX9303098A patent/MX9303098A/es not_active IP Right Cessation
- 1993-05-27 CN CN93106026A patent/CN1053499C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5329818A (en) | 1994-07-19 |
RU94046114A (ru) | 1996-11-20 |
EP0642658B1 (en) | 1998-07-01 |
DE69319430T2 (de) | 1999-02-25 |
WO1993024818A3 (en) | 1994-02-03 |
RU2139509C1 (ru) | 1999-10-10 |
WO1993024818A2 (en) | 1993-12-09 |
DE69319430D1 (de) | 1998-08-06 |
CN1079298A (zh) | 1993-12-08 |
CN1053499C (zh) | 2000-06-14 |
EP0642658A1 (en) | 1995-03-15 |
MX9303098A (es) | 1994-03-31 |
JP3247379B2 (ja) | 2002-01-15 |
CA2133732A1 (en) | 1993-12-09 |
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