CN102519669B - Pressure fluctuation calibrating device of pressure or differential pressure sensor and calibrating method thereof - Google Patents
Pressure fluctuation calibrating device of pressure or differential pressure sensor and calibrating method thereof Download PDFInfo
- Publication number
- CN102519669B CN102519669B CN 201110437159 CN201110437159A CN102519669B CN 102519669 B CN102519669 B CN 102519669B CN 201110437159 CN201110437159 CN 201110437159 CN 201110437159 A CN201110437159 A CN 201110437159A CN 102519669 B CN102519669 B CN 102519669B
- Authority
- CN
- China
- Prior art keywords
- pressure
- piston
- cylinder body
- frame
- transducer
- 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.)
- Active
Links
Images
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a pressure fluctuation calibrating device of a pressure or differential pressure sensor and a calibrating method thereof. The pressure fluctuation calibrating device comprises a main pressure container, a standard pressure sensor, a to-be-calibrated pressure sensor, a machine frame and a cylinder body fixedly disposed on the machine frame, wherein the standard pressure sensor and the to-be-calibrated pressure sensor are connected on the main pressure container, and the bottom of an inner cavity of the cylinder body is communicated with the main pressure container through a number two pipeline. A piston is disposed at the upper portion of the cylinder body, and a guiding flange is fixedly arranged on the outer wall of the top of a piston rod. The guiding flange takes a column of the machine frame as a guiding rail, and a displacement sensor is disposed on the guiding flange. The top of the machine frame is provided with a transmission mechanism which drives the piston rod to move vertically. The pressure fluctuation calibrating device and the calibrating method meet the pressure fluctuation calibrating requirement of the pressure or differential pressure sensor of the ordinary on-site environment.
Description
Technical field:
The present invention relates to caliberating device and the scaling method of fluid pressure sensor, particularly relate to a kind of simple, convenient, accurate hydrodynamic pressure or pressure surge caliberating device and the scaling method thereof of differential pressure pick-up.
Background technology:
Pressure is one of fluid basic parameter, and the pressure surge under certain pressure or differential pressure is measured and all seemed in a lot of fields extremely important, and it is unusual the key link that the pressure surge of pressure or differential pressure pick-up is demarcated; But, still lack simple, convenient and accurate pressure surge caliberating device and corresponding scaling method now.Existing two kinds of scaling methods: wherein a kind of pressure calibration mode is to provide pressure by forcing pump, show the pressure size of generation by the pressure transducer of standard, the method needs more utility appliance, needs larger working environment again, energy consumption is larger, carries inconvenience; The pressure size that the method produces is main to be controlled by surplus valve and forcing pump, the difficult fine adjustments that realizes the pressure size; Simultaneously, the pressure size of the method shows by the pressure transducer of standard, tonometric precision is determined by the precision of the pressure transducer of standard fully, in the situation of not using expensive standard pressure transducer, is the pressure surge calibration request that is difficult to reach pressure or differential pressure pick-up.Wherein another kind of pressure calibration method is piston type, come ratio to obtain the size of pressure by the quality of counterweight and the sectional area of piston, need to eliminate the frictional resistance that is carried on the piston in order to improve measuring accuracy, adopt assisted rotating mechanism to make between piston and cylinder body and form lubricating oil film, reduce friction factor, this piston-type pressure device utility appliance is more, and is higher to environmental requirement, cost is very high, is difficult to widespread use.
Summary of the invention:
For overcoming the defective of prior art, the object of the present invention is to provide a kind of simple, convenient, accurate pressure apparatus and scaling method, satisfy the pressure of common site environment or the pressure surge of differential pressure pick-up and demarcate needs.
Technical solution problem of the present invention adopts following technical scheme:
The pressure surge caliberating device of pressure transducer comprises:
Principal pressure container and be connected to standard pressure transducer and pressure transducer to be calibrated on the described principal pressure container;
Frame and be installed in cylinder body on the described frame, the intracavity bottom of described cylinder body is communicated with described principal pressure container by No. two pipelines;
The top of described cylinder body is provided with piston, and the top exterior walls of piston rod has been fixedly arranged on guide flange, and described guide flange is take the column of described frame as guide rail, and is provided with displacement transducer between guide flange and guide rail;
The top of described frame is provided with and drives the gear train that described piston rod moves up and down.
The epimere hollow of described piston rod also is provided with internal thread, and the top of described frame is provided with the leading screw with described internal thread coupling, and the top of frame also is provided with control motor, reductor and shaft coupling, and the top of described leading screw and described shaft coupling connect firmly.
Pressure surge for differential pressure pick-up is demarcated, and the scheme that the present invention adopts is:
The pressure surge caliberating device of differential pressure pick-up, it comprises:
Principal pressure container and be connected to standard pressure transducer and pressure transducer to be calibrated on the described principal pressure container;
Frame and be installed in cylinder body on the described frame, the intracavity bottom of described cylinder body is communicated with described principal pressure container by No. two pipelines;
The top of described cylinder body is provided with piston, and the top exterior walls of piston rod has been fixedly arranged on guide flange, and described guide flange is take the column of described frame as guide rail, and is provided with displacement transducer between guide flange and guide rail;
The top of described frame is provided with and drives the gear train that described piston rod moves up and down;
Auxiliary pressure vessel is set, is communicated with the inner chamber formation threeway at No. three pipelines with described No. two pipelines and the described cylinder body of auxiliary pressure vessel bottom, be provided with the second valve at described No. three pipelines;
The top of described auxiliary pressure vessel is communicated with described principal pressure container by a pipeline, and is provided with the first valve and differential pressure pick-up to be calibrated at a described pipeline.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, adopt piston displacement Fluid Computation pressure, thereby need not consider to be carried in the frictional resistance of piston, need not add the rotating mechanism of eliminating frictional resistance, easy to carry so that this pressure apparatus is simple without pump valve, cost;
2, adopt control motor, speed reduction unit, shaft coupling and screw-rod-driven and piston bar, by with the displacement transducer of piston rod synchronous shift, the displacement size that moves of control piston accurately and easily, thereby accurately control the volume change of fluid, finally reach the pressure of accurately controlling fluid and change, need not regulate pump, perhaps change counterbalance mass, so that this pressure apparatus is easy to use, and can produce required quite accurate pressure.
3, set up relation between piston displacement and pressure by curve, without pump, need not be equipped with expensive demarcation pressure transducer, without the counterweight assembly of outfit standard, so that this pressure measurement method practicality is wider, the installation cost reduction, simple to operate.
4, adopt displacement transducer to come gaging pressure, can obtain the pressure survey resolution higher than standard pressure transducer, better satisfy pressure under the certain pressure or the pressure surge calibration request of differential pressure pick-up.
Description of drawings:
Fig. 1 is the structural representation of apparatus of the present invention.
Number in the figure: 1 principal pressure container, 2 standard pressure transducer, 3 pressure transducers to be calibrated, 4 cylinder bodies, 5 No. two pipelines, 6 guide flanges, 7 columns, 8 displacement transducers, 9 piston rods, 10 leading screws, 11 control motors, 12 reductors, 13 shaft couplings, 14 auxiliary pressure vessel, 15 No. three pipelines, 16 second valves, No. 17 pipelines, 18 second valves, 19 differential pressure pick-ups to be calibrated.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment:
Embodiment 1: referring to Fig. 1, demarcate for the pressure surge of pressure transducer, its device comprises:
Principal pressure container 1 and be connected to standard pressure transducer 2 and pressure transducer to be calibrated 3 on the principal pressure container;
Frame and be installed in cylinder body 4 on the frame, the intracavity bottom of cylinder body 4 is communicated with principal pressure container 1 by No. two pipelines 5; Top at cylinder body 4 is provided with piston, seals between piston and the inboard wall of cylinder block, and piston moves up and down the fluid level lifting that drives in the inner chamber of cylinder block, makes the hydrodynamic pressure in the principal pressure container produce fluctuation.The top exterior walls of the piston rod 9 of described piston has been fixedly arranged on guide flange 6, guide flange 6 is take the column 7 of frame as guide rail, and be provided with displacement transducer 8 at guide flange, the epimere hollow of piston rod 9 also is provided with internal thread, the top of frame is provided with the leading screw 10 with the internal thread coupling, the top of frame also is provided with control motor 11, reductor 12 and shaft coupling 13, and the top of leading screw 10 and shaft coupling 13 connect firmly.During work, rotated by control motor-driven leading screw 10, leading screw only rotates not upper and lower displacement, therefore can be moved up and down by the screw-rod-driven and piston bar.
Adopt this device that pressure transducer is carried out the method that pressure surge is demarcated, carry out as follows during operation:
A, pressure transducer 3 to be calibrated is installed on the principal pressure container 1;
B, startup control motor 11, drive leading screw 10 and rotate by reductor 12, shaft coupling 13, it is descending that leading screw 10 drives piston rod 9, range according to pressure transducer 3 to be calibrated, select some different spot pressures that are distributed in the range pressure range, mobile piston begins until the pressure that standard pressure transducer 2 shows reaches the pressure of the full scale of pressure transducer 3 to be calibrated from zero pressure;
C, write down the force value of different pressures point and the shift value on the corresponding displacement transducer 8 thereof respectively, take described shift value as horizontal ordinate, take force value as ordinate, in rectangular coordinate system, mark the shift value of displacement transducer demonstration and the corresponding one group of coordinate points of force value that the respective standard pressure transducer shows, use again this group coordinate points of curve, set up the relation between the pressure of piston displacement and principal pressure container;
D, the pressure surge under authorised pressure that will measure according to pressure transducer to be calibrated, the first step, the mobile piston of large displacement makes the numerical value that shows on the standard pressure transducer 2 reach authorised pressure; Second step, according to the relation between the pressure of the piston displacement of having set up and principal pressure container, obtained the shift value of piston by the size of pressure surge, micro-mobile piston again, just can produce required slight pressure fluctuation, obtain the slight pressure fluctuation that standard pressure transducer can't be measured, the demarcation of the pressure surge of nominal pressure sensor is treated in realization.
Embodiment 2: the pressure surge for differential pressure pick-up is demarcated, and its device comprises:
Principal pressure container 1 and be connected to standard pressure transducer 2 and pressure transducer to be calibrated 3 on the principal pressure container;
Frame and be installed in cylinder body 4 on the frame, the intracavity bottom of cylinder body 4 is communicated with principal pressure container 1 by No. two pipelines 5; Top at cylinder body 4 is provided with piston, seals between piston and the inboard wall of cylinder block, and piston moves up and down the fluid level lifting that drives in the inner chamber of cylinder block, makes the hydrodynamic pressure in the principal pressure container produce fluctuation.The top exterior walls of the piston rod 9 of described piston has been fixedly arranged on guide flange 6, guide flange 6 is take the column 7 of frame as guide rail, and be provided with displacement transducer 8 at guide flange, the epimere hollow of piston rod 9 also is provided with internal thread, the top of frame is provided with the leading screw 10 with the internal thread coupling, the top of frame also is provided with control motor 11, reductor 12 and shaft coupling 13, and the top of leading screw 10 and shaft coupling 13 connect firmly.During work, rotated by control motor-driven leading screw 10, leading screw only rotates not upper and lower displacement, therefore can be moved up and down by the screw-rod-driven and piston bar.
The top of auxiliary pressure vessel 14 is communicated with principal pressure container 1 by a pipeline 17, and is provided with the first valve 18 and differential pressure pick-up to be calibrated 19 at a pipeline 17.
Adopt this device that differential pressure pick-up is carried out the method that pressure surge is demarcated, carry out as follows during operation:
A, differential pressure pick-up 19 to be calibrated is installed on the pipeline 17 between the first valve 18 and the auxiliary pressure vessel 14, then opens the first valve 18 and the second valve 16;
B, startup control motor 11 drive leading screws 10 and rotate by reductor 12, shaft coupling 13, and it is descending that leading screw 10 drives piston rods 9, and piston moves down, so that standard pressure transducer 2 reaches reference pressure, and closing control motor 11;
C, close the second valve 16, again start control motor 11, leading screw 10 driven plunger move down, range according to differential pressure pick-up 19 to be calibrated, select some different spot pressures that are distributed in the range pressure, mobile piston is from the reference pressure value, until the pressure that standard pressure transducer shows reach reference pressure and differential pressure pick-up to be calibrated range pressure and the time, write down respectively the shift value on the displacement transducer of the force value of different pressures point and correspondence thereof;
D, take shift value as horizontal ordinate, take force value as ordinate, in rectangular coordinate system, mark shift value and the force value of respective standard pressure transducer demonstration and the corresponding one group of coordinate points of difference of reference pressure that displacement transducer shows, use again this group coordinate points of curve, under reference pressure, the relation between the pressure of setting up piston displacement and principal pressure container changes;
E, the pressure surge under the regulation differential pressure that will measure according to differential pressure pick-up to be calibrated, the first step, mobile piston makes the numerical value that shows on the standard pressure transducer reach regulation reference pressure value; Second step, according to the relation between the pressure variation of the piston displacement of having set up and principal pressure container, obtained the shift value of piston by the size of pressure surge, the trace mobile piston, just can produce required slight pressure fluctuation, obtain the slight pressure fluctuation that standard pressure transducer can't be measured, realize the demarcation to the pressure surge of differential pressure pick-up to be calibrated under authorised pressure.
In the situation that fluid property determines, adopt the relation curve between high-precision standard pressure transducer build-up pressure and piston displacement after, can be without standard pressure transducer 2 in using later on.This device also can directly be demarcated as the pressure calibration of the pressure transducer that hangs down precision and the pressure reduction of low low precision pressure sensor.
Claims (2)
1. the pressure surge caliberating device of pressure transducer is characterized in that comprising:
Principal pressure container (1) and be connected to standard pressure transducer (2) and pressure transducer to be calibrated (3) on the described principal pressure container;
Frame and be installed in cylinder body (4) on the described frame, the intracavity bottom of described cylinder body (4) is communicated with described principal pressure container (1) by No. two pipelines (5);
The top of described cylinder body (4) is provided with piston, and the top exterior walls of piston rod (9) has been fixedly arranged on guide flange (6), and described guide flange (6) is take the column (7) of described frame as guide rail, and is provided with displacement transducer (8) between guide flange and guide rail;
The top of described frame is provided with and drives the gear train that described piston rod (9) moves up and down.
2. the pressure surge caliberating device of pressure transducer according to claim 1, it is characterized in that, the epimere hollow of described piston rod (9) also is provided with internal thread, described gear train comprises: be provided with the leading screw (10) with described internal thread coupling on the top of described frame, the top of frame also is provided with control motor (11), reductor (12) and shaft coupling (13), and the top of described leading screw (10) and described shaft coupling (13) connect firmly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110437159 CN102519669B (en) | 2011-12-23 | 2011-12-23 | Pressure fluctuation calibrating device of pressure or differential pressure sensor and calibrating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110437159 CN102519669B (en) | 2011-12-23 | 2011-12-23 | Pressure fluctuation calibrating device of pressure or differential pressure sensor and calibrating method thereof |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310291422.4A Division CN103344373B (en) | 2011-12-23 | 2011-12-23 | Method for carrying out pressure fluctuation calibration on pressure sensor |
| CN201310291402.7A Division CN103344384B (en) | 2011-12-23 | 2011-12-23 | Pressure fluctuation calibration device of differential pressure sensor |
| CN201310291755.7A Division CN103364138B (en) | 2011-12-23 | 2011-12-23 | Method for performing pressure fluctuation calibration on differential pressure transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102519669A CN102519669A (en) | 2012-06-27 |
| CN102519669B true CN102519669B (en) | 2013-09-18 |
Family
ID=46290666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110437159 Active CN102519669B (en) | 2011-12-23 | 2011-12-23 | Pressure fluctuation calibrating device of pressure or differential pressure sensor and calibrating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102519669B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2819564C1 (en) * | 2023-11-13 | 2024-05-21 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия материально-технического обеспечения имени генерала армии А.В. Хрулёва" | Dynamic pressure sensor testing device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092227B (en) * | 2015-08-25 | 2017-08-04 | 太原鹏跃电子科技有限公司 | 120 valves and empty and load testing stand pressure sensor sampling channel caliberating device |
| CN108613772B (en) * | 2018-06-06 | 2020-05-19 | 广西防城港核电有限公司 | Offline calibration method for nuclear power station differential pressure transmitter |
| CN110608974A (en) * | 2019-10-15 | 2019-12-24 | 中煤科工集团重庆研究院有限公司 | Drillings gas desorption index calibrator |
| CN110736585B (en) * | 2019-10-21 | 2021-01-19 | 红旗仪表有限公司 | High-voltage precise pressure control method |
| CN112213027A (en) * | 2020-09-09 | 2021-01-12 | 中国第一汽车股份有限公司 | Rapid calibrating device and calibrating method for pressure sensor |
| CN114754924A (en) * | 2022-04-29 | 2022-07-15 | 东风电驱动系统有限公司 | Processing method, device and equipment for sensor calibration interruption and storage medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2382014Y (en) * | 1998-08-28 | 2000-06-07 | 复旦大学 | Instrument for measuring and calibrating micropressure sensor in closed container |
| KR20020071593A (en) * | 2001-03-07 | 2002-09-13 | 삼성전자 주식회사 | Apparatus and method for calibrating zero point of differential pressure sensor |
| JP2003508742A (en) * | 1999-08-27 | 2003-03-04 | ローズマウント インコーポレイテッド | Pressure transmitter, method of predicting magnitude of error in pressure transmitter, and medium |
| CN201184836Y (en) * | 2008-04-30 | 2009-01-21 | 王衍魁 | Automatic calibration apparatus for pressure detection |
| CN102012299A (en) * | 2010-09-16 | 2011-04-13 | 清华大学 | Disassembly-free calibrating device and method of pressure sensor for hydrogen cylinder |
| CN102175390A (en) * | 2011-02-25 | 2011-09-07 | 南京航空航天大学 | Piezoelectric sensor calibrating device and method |
| CN202453145U (en) * | 2011-12-23 | 2012-09-26 | 合肥工业大学 | Pressure oscillation demarcating device of pressure or differential pressure sensor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6935156B2 (en) * | 2003-09-30 | 2005-08-30 | Rosemount Inc. | Characterization of process pressure sensor |
| JP5230650B2 (en) * | 2007-12-06 | 2013-07-10 | 旭化成メディカル株式会社 | How to calibrate the pressure measurement unit |
-
2011
- 2011-12-23 CN CN 201110437159 patent/CN102519669B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2382014Y (en) * | 1998-08-28 | 2000-06-07 | 复旦大学 | Instrument for measuring and calibrating micropressure sensor in closed container |
| JP2003508742A (en) * | 1999-08-27 | 2003-03-04 | ローズマウント インコーポレイテッド | Pressure transmitter, method of predicting magnitude of error in pressure transmitter, and medium |
| KR20020071593A (en) * | 2001-03-07 | 2002-09-13 | 삼성전자 주식회사 | Apparatus and method for calibrating zero point of differential pressure sensor |
| CN201184836Y (en) * | 2008-04-30 | 2009-01-21 | 王衍魁 | Automatic calibration apparatus for pressure detection |
| CN102012299A (en) * | 2010-09-16 | 2011-04-13 | 清华大学 | Disassembly-free calibrating device and method of pressure sensor for hydrogen cylinder |
| CN102175390A (en) * | 2011-02-25 | 2011-09-07 | 南京航空航天大学 | Piezoelectric sensor calibrating device and method |
| CN202453145U (en) * | 2011-12-23 | 2012-09-26 | 合肥工业大学 | Pressure oscillation demarcating device of pressure or differential pressure sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2819564C1 (en) * | 2023-11-13 | 2024-05-21 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия материально-технического обеспечения имени генерала армии А.В. Хрулёва" | Dynamic pressure sensor testing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102519669A (en) | 2012-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102519669B (en) | Pressure fluctuation calibrating device of pressure or differential pressure sensor and calibrating method thereof | |
| CN108916158B (en) | A kind of oil cylinder stroke Detection & Controling method based on hydraulic oil volume flow | |
| CN102680057B (en) | Piston type gas-liquid dual-purpose micro-flow standard device | |
| CN102175387B (en) | Rolling friction cylinder hydraulic type force standard machine | |
| CN104949740B (en) | Liquid level gauge automatic gauge calibrating installation and method | |
| CN103344373B (en) | Method for carrying out pressure fluctuation calibration on pressure sensor | |
| CN102175292A (en) | Piston-type gas flow standard device | |
| CN201607267U (en) | Dual-piston gas flow calibrator | |
| CN101403668A (en) | Measuring apparatus and test method for volume elastic modulus of solid buoyancy material | |
| CN104236817A (en) | Dynamic sealing performance testing method and device for plunger cylinder sleeve | |
| CN103123042A (en) | Variable air-capacitor device | |
| CN202453145U (en) | Pressure oscillation demarcating device of pressure or differential pressure sensor | |
| CN101762307B (en) | Gas flow calibrating device based on bell shape-column shape dual piston structure | |
| CN104165661B (en) | A kind of low pressure loss differential pressure flowmeter and its scaling method and flow metering method | |
| CN103364138B (en) | Method for performing pressure fluctuation calibration on differential pressure transducer | |
| CN102175389B (en) | Rolling friction piston pressure gauge | |
| CN108730266B (en) | Device and method for measuring internal leakage of hydraulic cylinder | |
| CN202041260U (en) | Piston type gas flow rate standard device | |
| CN204613786U (en) | A kind of integrated form ink viscosity Temperature-controlled appliance | |
| CN203595652U (en) | Asphaltic mixture water seepage test instrument | |
| CN103344384B (en) | Pressure fluctuation calibration device of differential pressure sensor | |
| CN104034396A (en) | Wide-range piston-type gas flow standard device | |
| CN206847739U (en) | Two-way self-circulation type liquid level meter detecting device | |
| CN207096832U (en) | A kind of capacity high-pressure gas pressure control device | |
| CN204694705U (en) | A kind of portable hydraulic system air air content proving installation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |