CN101571417B - Calibration method of flowmeter - Google Patents
Calibration method of flowmeter Download PDFInfo
- Publication number
- CN101571417B CN101571417B CN2009103027039A CN200910302703A CN101571417B CN 101571417 B CN101571417 B CN 101571417B CN 2009103027039 A CN2009103027039 A CN 2009103027039A CN 200910302703 A CN200910302703 A CN 200910302703A CN 101571417 B CN101571417 B CN 101571417B
- Authority
- CN
- China
- Prior art keywords
- flow
- flowmeter
- time period
- variable
- tested flowmeter
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000005303 weighing Methods 0.000 abstract 2
- 239000012530 fluid Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
A calibration method of a flowmeter comprises the following steps: S1: providing a calibration system which consists of a stable liquid source, a detected flowmeter, a flow regulating valve, a switch regulating valve and a weighing machine connected sequentially by a pipeline; S2: turning on a switch control valve, recording the current time t1 by a controller, examining the instantaneous deliverydisplayed on the instrument, turning off the switch control valve immediately after the flow rate displayed is stable, recording the current time t2 immediately after turning off in place, and recording the variable W1 on the weighing machine, the flow rate of the detected flowmeter corresponding to the time period (t2-t1) being Q12; S3: repeating the processes in S2, the beginning and ending time being respectively t3 and t4, recording the variable W2 on a calibrator, the corresponding flow rate of the detected flowmeter being Q34; and S4: in the time period from (t4-t3) to (t2-t1), the medium flow being constant and the period being constant flow time period, the flow rate of detected flowmeter corresponding to the constant flow time period being Q34-Q12, the used time pang equaling to(t4-t3)-(t2-t1), comparing the variable (W2-W1) on the calibrator in the time period from (t4-t3) to (t2-t1) with the variable (Q34-Q12) on the detected flowmeter and realizing the calibration of thedetected flowmeter.
Description
Technical field
The present invention relates to a kind of calibration method of flowmeter.
Background technology
It is the problem that the calibrating field often will run into that fluid flow is demarcated, accurately just need stable flow rate and synchronous metering for calibration result, mostly be in the existing technology to adopt commutator, commutator is provided with in order to realize stable flow rate and synchronous metering.
But existing these adopt the method for commutator all can exist structure relatively complicated, and control is trouble comparatively, and natural cost also can be than higher
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of calibration method of flowmeter that need not commutator.
The technical solution adopted for the present invention to solve the technical problems is: it may further comprise the steps: S1: a calibration system is provided, and this system comprises the stable liquid source that links to each other successively by pipeline, tested flowmeter, flow control valve, regulating switch valve and weigher; S2: open switching control pilot, controller writes down current time t1 simultaneously, check the instantaneous delivery that instrument shows, up to the stability of flow that shows, horse back off switch operation valve, close this moment of back immediate record t2 that puts in place, and record weigher variable W1, the tested surface low amount corresponding in the time period (t2-t1) is Q12; S3: repeat the action of S2, the moment of start-stop this time is respectively t3 and t4, and record standard device variable W2, and pairing tested surface low amount is Q34; S4: in the time period (t4-t3)-(t2-t1), media flow is constant, this is the constant current time period, the tested surface low amount of constant current time period correspondence is Q34-Q12, used time Wei Pang=(t4-t3)-(t2-t1), relatively the variable (W2-W1) of standard and the variable (Q34-Q12) of tested table under the time period (t4-t3)-t2-t1) are realized the demarcation to tested table.
The technical solution adopted for the present invention to solve the technical problems is: open operation valve and closed control valve all will be according to identical principle, to guarantee consistance at every turn.
The technical solution adopted for the present invention to solve the technical problems is: the standard variable W=W2-W1 of constant current time period correspondence, and used time Wei Pang=(t4-t3)-(t2-t1).
The technical solution adopted for the present invention to solve the technical problems is: described S2 step begins to take a step forward and may further comprise the steps: S11: make liquid source and course inflow-rate of water turbine meter, the switching control pilot standard-sized sheet, adjust flow control valve, make stability of flow to the flow of required demarcation.
Compared to prior art, the calibration method of flowmeter basis of employing of the present invention flows through the flow of flowmeter and the variable of standard comes proving flowmeter, it does not need commutator just can realize flow meter calibration, it is different from the method for long-play with the influence of rising of elimination flow and decline that adopt, need not the standard of wide range, its standard range is equal to the range that adopts the commutator mode.
Description of drawings
Fig. 1 is the caliberating device structural representation of the calibration method of flowmeter of employing of the present invention.
Fig. 2 is the principle schematic of flow calibration of the calibration method of flowmeter of employing of the present invention.
Embodiment
Following content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
As Fig. 1 and shown in Figure 2, the calibration method of flowmeter of employing of the present invention calibration system comprise tested flowmeter, stable liquid source, flow control valve, switching control pilot, standard, controller and pipeline.
Wherein flow control valve is the valve that the flow size is had fine regulating action.
Switching control pilot has two kinds of duties: open or close, can use signal controlling, this signal can be that the gas signal can be an electric signal also, but is not limited to this.
Standard can be desired electronic scales of meter proof rules or standard measuring device etc. as the measurement instrument of standard.
The course of work of system:
A. make liquid source and course inflow-rate of water turbine meter, the switching control pilot standard-sized sheet is adjusted flow control valve, makes stability of flow to the flow of required demarcation.Following process keeps control valve position motionless.
B. off switch operation valve, standard is ready, the accumulation value of recording flowmeter.
C. open switching control pilot, controller writes down current time t1 simultaneously, checks the instantaneous delivery that instrument shows, up to the stability of flow that shows, the off switch operation valve is closed this moment of back immediate record t2 that puts in place at once, and record standard device variable W1.
D. repeat the c action in step, the moment of start-stop this time is respectively t3 and t4, and the time that the time of current operation is greater than the requirement of t2-t1+ rules gets final product, and record standard device variable W2.
E. calculated flow rate is as follows: flow through flowmeter flow Qs=Q34-Q12 with current constant mode, this is tested surface low value, standard variable W=W2-W1, claim and flowmeter equivalent units amount according to density, temperature conversion, this is the standard scale variable, repeat a plurality of flow points and repeatedly calibrating (by rules), calculate by vertification regulation and can examine and determine (demarcation) flowmeter.
F. flow through the used time Wei Pang of Q34-Q12 flow=(t4-t3)-(t2-t1), then the instantaneous delivery of flowmeter: the fn=W/ Pang.
T1 is to the process of closing from valve open to the flow of t2, fluid is just closed after reaching regime flow, the flow of this process is the trapezoidal Q12 of flow, be this process (uphill process flow q1+ descended range of flow q2), flow from t3 to t4 fluid flows amount meter is the trapezoidal Q34 of flow, it has comprised fluid uphill process flow q1 and the range of flow q2 that descended, t3 to the flow of t4 trapezoidal (flow is trapezoidal be meant comprised flow from zero to regime flow again to zero flow, its instantaneous delivery and time shaft constitute a trapezoidal curve, it is trapezoidal that the flow of this similar trapezoidal area is called flow) the Q34 flow that deducts uphill process and decline process is exactly the flow Qs of stability of flow section, so just calculated regime flow Qs from t1 ' to t2 ', variable with this flow Qs and standard compares, just can calculate the error of flowmeter, repeat this process, just can realize calibrating flowmeter.
In the above-mentioned steps, open operation valve and closed control valve all will be according to identical principle, to guarantee consistance (repeatability) at every turn.
The essence of this method is with two trapezoidal flows of being stablized (constant) flow section that subtract each other of flow.Obtain the time of stable section simultaneously.
This method has been eliminated flow rise and the descend uncertainty of the flow metering that causes with flow trapezoidal method of subtracting each other.
The calibration method of flowmeter basis of employing of the present invention flows through the flow of flowmeter and the variable of standard comes proving flowmeter, it does not need commutator just can realize flow meter calibration, it is different from the method for long-play with the influence of rising of elimination flow and decline that adopt, need not the standard of wide range, its standard range is equal to the range that adopts the commutator mode.
Claims (2)
1. calibration method of flowmeter, it may further comprise the steps: S1: a calibration system is provided, and this system comprises the stable liquid source that links to each other successively by pipeline, tested flowmeter, flow control valve, switching control pilot and weigher; S2: open switching control pilot, controller writes down current time t1 simultaneously, check the instantaneous delivery that tested flowmeter shows, up to the stability of flow that shows, horse back off switch operation valve, close this moment of back immediate record t2 that puts in place, and record weigher variable W1, the tested flowmeter flow corresponding in the time period (t2-t1) is Q12; S3: repeat the action of S2, the moment of start-stop this time is respectively t3 and t4, and record weigher variable W2, and pairing tested flowmeter flow is Q34; S4: in the time period (t4-t3)-(t2-t1), media flow is constant, this is the constant current time period, the tested flowmeter flow of constant current time period correspondence is Q34-Q12, the used time is Δ t=(t4-t3)-(t2-t1), compare the variable (W2-W1) of weigher under the time period (t4-t3)-(t2-t1) and the variable (Q34-Q12) of tested flowmeter, realization is to the demarcation of tested flowmeter, open switching control pilot and off switch operation valve all will be according to identical principle, to guarantee consistance at every turn.
2. calibration method of flowmeter according to claim 1, it is characterized in that: described S2 step begins to take a step forward and may further comprise the steps: S11: make the flow of liquid in the liquid source cross tested flowmeter, the switching control pilot standard-sized sheet, adjust flow control valve, make stability of flow to the flow of required demarcation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103027039A CN101571417B (en) | 2009-05-27 | 2009-05-27 | Calibration method of flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103027039A CN101571417B (en) | 2009-05-27 | 2009-05-27 | Calibration method of flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101571417A CN101571417A (en) | 2009-11-04 |
| CN101571417B true CN101571417B (en) | 2011-01-19 |
Family
ID=41230832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103027039A Expired - Fee Related CN101571417B (en) | 2009-05-27 | 2009-05-27 | Calibration method of flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101571417B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509844A (en) * | 2015-11-23 | 2016-04-20 | 华南理工大学 | Open type commutator calibration method for general liquid flow calibrating apparatus |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183284B (en) * | 2011-04-14 | 2012-06-27 | 张广忠 | Liquid flow standard calibration device |
| CN102680058B (en) * | 2012-05-18 | 2014-04-09 | 上海市计量测试技术研究院 | Movable liquid flux standard device adopting mass method |
| CN103234606B (en) * | 2013-04-19 | 2016-01-20 | 睿能太宇（沈阳）能源技术有限公司 | A kind of flow verification system and calibration method thereof |
| CN103278220B (en) * | 2013-06-05 | 2015-09-30 | 中国计量学院 | A kind of method and device thereof diaphragm gas meter fundamental error being carried out to rapid verification |
| CN105004407B (en) * | 2015-04-30 | 2018-03-20 | 安徽江淮汽车集团股份有限公司 | A kind of Instantaneous Fuel Consumption Monitor calibration system and its scaling method |
| JP6557550B2 (en) * | 2015-08-21 | 2019-08-07 | アズビル株式会社 | Method and apparatus for testing liquid flowmeter |
| CN115468634A (en) * | 2022-11-02 | 2022-12-13 | 江苏水科尚禹能源技术研究院有限公司 | Turbine flowmeter calibration detection method and device |
-
2009
- 2009-05-27 CN CN2009103027039A patent/CN101571417B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509844A (en) * | 2015-11-23 | 2016-04-20 | 华南理工大学 | Open type commutator calibration method for general liquid flow calibrating apparatus |
| CN105509844B (en) * | 2015-11-23 | 2018-09-28 | 华南理工大学 | A kind of universal liquid flowrate calibrating device open commutator calibration method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101571417A (en) | 2009-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101571417B (en) | Calibration method of flowmeter | |
| CN106679770B (en) | Mass calibration system and method for mass flowmeter | |
| CN103175582B (en) | Fluid metering method and apparatus | |
| CN207317905U (en) | Flow Meter Calibration Device | |
| CN204964196U (en) | Experimental testing arrangement of liquid engine nozzle liquid stream | |
| CN110608788A (en) | A viscous liquid flow automatic detection system and method | |
| CN105157793A (en) | Inspection method and inspection system of flow sensor | |
| CN105651361B (en) | Automatic pressure regulating, detecting and calibrating device and method for ultrasonic water meter | |
| CN102967348A (en) | Full-flow-point rapid detection device for water meter | |
| CN107340038A (en) | Mass flowmenter automatic Calibration and measuring and testing device system and detection method | |
| CN104964729B (en) | A kind of calibrating installation of fluid metering instrument | |
| CN203785749U (en) | Liquid flow device adopting dynamic quality method | |
| CN202289890U (en) | Gas concentration proportioning device based on mass flow | |
| CN206223265U (en) | The quality demarcation system of mass flowmenter | |
| CN211696618U (en) | Calibration device for variable water head water flow standard device | |
| CN108955839B (en) | Automatic flow calibrating device for electronic soap film | |
| BR112012026229B1 (en) | production method and device for producing a setpoint signal, supply method and system for providing a setpoint signal, and, turbomachinery | |
| CN101430216B (en) | Mass flow sensor and control system and realize the method that mass rate controls | |
| CN208805264U (en) | Electronic soap film flow automatic verification device | |
| CN201081742Y (en) | Flow integrating instrument | |
| CN201149498Y (en) | Intelligent liquid crystal display flux integrating instrument with compensation | |
| CN203259135U (en) | System for calibrating thickness of water film of road state detection sensor | |
| CN106444931A (en) | A white spirit alcoholic strength on-line monitoring method and a monitoring device | |
| CN204788587U (en) | Transient state oil consumption appearance calibration system | |
| CN105004407A (en) | Transient oil consumption instrument calibration system and calibration method thereof |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20180527 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |