CN103344373A - Method for carrying out pressure fluctuation calibration on pressure sensor - Google Patents
Method for carrying out pressure fluctuation calibration on pressure sensor Download PDFInfo
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- CN103344373A CN103344373A CN2013102914224A CN201310291422A CN103344373A CN 103344373 A CN103344373 A CN 103344373A CN 2013102914224 A CN2013102914224 A CN 2013102914224A CN 201310291422 A CN201310291422 A CN 201310291422A CN 103344373 A CN103344373 A CN 103344373A
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Abstract
The invention discloses a method for carrying out pressure fluctuation calibration on pressure sensor. The calibration device comprises a main pressure container, a standard pressure sensor, a pressure sensor to be calibrated, a machine frame and a cylinder body fixed on the machine frame. The standard pressure sensor and the pressure sensor to be calibrated are connected to the main pressure container. The bottom of an inner cavity of the cylinder body is communicated with the main pressure container through a second pipeline, a piston is arranged at the upper portion of the cylinder body, a guide flange is fixedly arranged on the outer wall of the top of a piston rod, the guide flange uses a column of the machine frame as a guide rail, a displacement sensor is positioned on the guide flange, and a transmitting mechanism capable of driving the piston rod to move up and down is positioned at the top of the machine frame. The device and method can meet requirements for calibrating pressure fluctuation of general site environments or differential pressure sensors.
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 extremely important in a lot of fields, 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, the pressure size that shows generation again by the pressure transducer of standard, this method needs more utility appliance, needs bigger working environment, energy consumption is bigger, carries inconvenience; The pressure size that this 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 this method shows by the pressure transducer of standard, tonometric precision is determined by the precision of the pressure transducer of standard fully, under 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 eliminate the frictional resistance that is carried on the piston in order to improve measuring accuracy, adopt auxiliary 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 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 guide rail with the column of described frame, 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 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 guide rail with the column of described frame, 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 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 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, without pump valve, make that this pressure apparatus is simple, easy to carry, cost reduces;
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 the counterweight quality, make that this pressure apparatus is easy to use, and can produce required suitable accurate pressure.
3, set up relation between piston displacement and pressure by the curve match, without pump, need not be equipped with expensive demarcation pressure transducer, without the counterweight assembly of outfit standard, make that this pressure measurement method practicality is wideer, 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 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 guide rail with the column 7 of frame, 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 in being distributed between the range pressure zone, mobile piston begins till the pressure that standard pressure transducer 2 shows reaches the pressure of 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, be horizontal ordinate with described shift value, be ordinate with the force value, 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 this group coordinate points of curve match again, 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 big 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 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 guide rail with the column 7 of frame, 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.
Auxiliary pressure vessel 14 is set in addition, is communicated with in the inner chamber formation threeway with No. two pipelines 5 and cylinder body of No. three pipelines 15 of auxiliary pressure vessel 14 bottoms, be provided with second valve 16 at No. three pipelines 15;
The top of auxiliary pressure vessel 14 is communicated with principal pressure container 1 by a pipeline 17, and is provided with 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 first valve 18 and the auxiliary pressure vessel 14, opens first valve 18 and second valve 16 then;
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, and makes standard pressure transducer 2 reach reference pressure, closing control motor 11;
C, close second valve 16, start control motor 11 again, 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, up to the pressure that standard pressure transducer shows reach reference pressure and differential pressure pick-up to be calibrated range pressure with the time till, write down the shift value on the displacement transducer of the force value of different pressures point and correspondence thereof respectively;
D, be horizontal ordinate with the shift value, be ordinate with the force value, 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 this group coordinate points of curve match again, 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.
Under the situation that fluid property is determined, behind the relation curve between employing high precision standard pressure transducer build-up pressure and piston displacement, 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.
Auxiliary pressure vessel 14 also can be pipeline.
Claims (1)
1. one kind is carried out the method that pressure surge is demarcated to pressure transducer, it is characterized in that arranging the pressure surge caliberating device of pressure transducer, and described caliberating device comprises:
Principal pressure container (1) and be connected 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 guide rail with the column (7) of described frame, 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; 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;
The method that described pressure surge is demarcated is carried out as follows:
A, pressure transducer to be calibrated (3) 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 to be calibrated (3), select some different spot pressures in being distributed between the range pressure zone, mobile piston begins till the pressure that standard pressure transducer (2) shows reaches the pressure of full scale of pressure transducer to be calibrated (3) 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, be horizontal ordinate with described shift value, be ordinate with the force value, 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 this group coordinate points of curve match again, 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, mobile piston makes standard pressure transducer (2) go up the numerical value that shows and reaches authorised pressure greatly with displacement; 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310291422.4A CN103344373B (en) | 2011-12-23 | 2011-12-23 | Method for carrying out pressure fluctuation calibration on pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310291422.4A CN103344373B (en) | 2011-12-23 | 2011-12-23 | Method for carrying out pressure fluctuation calibration on pressure sensor |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110437159 Division CN102519669B (en) | 2011-12-23 | 2011-12-23 | Pressure fluctuation calibrating device of pressure or differential pressure sensor and calibrating method thereof |
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| Publication Number | Publication Date |
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| CN103344373A true CN103344373A (en) | 2013-10-09 |
| CN103344373B CN103344373B (en) | 2015-03-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916556A (en) * | 2019-04-11 | 2019-06-21 | 华能国际电力股份有限公司 | Portable dynamic and static calibration system for pressure sensor |
| CN110514353A (en) * | 2019-03-20 | 2019-11-29 | 张红刚 | Pressure chamber piston manometer |
| CN110736585A (en) * | 2019-10-21 | 2020-01-31 | 红旗仪表有限公司 | high-pressure precise pressure control method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672254B (en) * | 2019-10-17 | 2021-09-17 | 长春光华学院 | Pressure monitoring device for heat treatment and use method |
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Patent Citations (5)
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| EP1369677A1 (en) * | 2002-06-05 | 2003-12-10 | General Electric Company | Calibration method and system for a dynamic combustor sensor |
| CN2585210Y (en) * | 2002-12-01 | 2003-11-05 | 中国石化集团江汉石油管理局仪表厂 | Automatic pressure gauge calibrating instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514353A (en) * | 2019-03-20 | 2019-11-29 | 张红刚 | Pressure chamber piston manometer |
| CN109916556A (en) * | 2019-04-11 | 2019-06-21 | 华能国际电力股份有限公司 | Portable dynamic and static calibration system for pressure sensor |
| CN109916556B (en) * | 2019-04-11 | 2023-11-03 | 华能国际电力股份有限公司 | Portable dynamic and static calibration system for pressure sensor |
| CN110736585A (en) * | 2019-10-21 | 2020-01-31 | 红旗仪表有限公司 | high-pressure precise pressure control method |
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| CN103344373B (en) | 2015-03-25 |
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