CN207798220U - The check device of flowmeter calibration system - Google Patents
The check device of flowmeter calibration system Download PDFInfo
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- CN207798220U CN207798220U CN201820255256.0U CN201820255256U CN207798220U CN 207798220 U CN207798220 U CN 207798220U CN 201820255256 U CN201820255256 U CN 201820255256U CN 207798220 U CN207798220 U CN 207798220U
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Abstract
The utility model discloses a kind of check devices of flowmeter calibration system, are detected flowmeter and are mounted on pipeline, check standard device includes proving flowmeter and signal acquisition module, and being installed in series on pipeline has tested flowmeter, proving flowmeter and air source.The utility model verifies the metering performance for being detected flowmeter by check standard device, using High-precision standard flowmeter as check standard, precision is high, stability is good, meet the requirement of internal check standard, realize the real time monitoring to the stability of flowmeter, and automatic decision is detected whether flowmeter performance deviates, and effectively avoids tested flowmeter that measurement error occurs between demarcating twice, improves the data analysis accuracy that terminal uses system.
Description
Technical field
The utility model is related to flow meter calibrating fields, especially a kind of to be carried out to the gas flowmeter used online
The check device of precision alignment system.
Background technology
It needs that gas mass flow gauge is installed in automobile engine nacelle, for measuring the air capacity in sucking engine, and
Flow signal is fed back into automotive control system, by automobile engine fuel oil electric injection system come accurately control fuel injection amount and
Injection time, it is ensured that completely burned after oil gas is mixed with the air of sucking.Engine under various operating conditions in order to can obtain
Obtain the gaseous mixture of best fuel concentration, it is necessary to accurate to measure per the air capacity for sucking engine in a flash, as electric injection system meter
The Main Basiss of distributive value are calculated and control, therefore accurate measure of gas mass flow gauge weighs the efficient operation of engine very much
It wants.Equally, in test engine performance, the accurate measurement of engine intake airflow is the significant terms of engine bench test
Mesh, measurement result directly affect the bulking properties such as dynamic property, economy, oil consumption, the exhaust emissions index for judging automobile engine
Can, so the calibration of the gas mass flow meter measurement performance of automobile becomes an important job.
In prolonged test, due to the use of frequent, the meters such as error, repeatability, linear, stability of mass flowmenter
It measures performance to be possible to generate deviation, thus effective monitoring and the appearance of convection current flowmeter measurement result must be carried out to its metering performance
Deviation correct in time, to ensure the accurate and reliable of measurement data.The universal method used in industry at present is periodically by flow
After meter disassembles, send to third party metrological service and demarcate, calibration certificate is provided by third party metrological service, flowmeter makes
The flow signal data that flowmeter exports are modified further according to the information of calibration certificate with side.But this fixed cycle mark
It is insufficient to there are several points in fixed method：First, the metering performance of flowmeter can not be monitored in real time, if flowmeter is demarcating it twice
Between metering performance occur deviate, measurement data and real traffic that flowmeter exports will be caused error occur, influenced to engine
The accurate test and judgement of performance, and can not find out the engine batch of fault time and wrong measurement data；Second, even if root
According to the information for the calibration certificate that third party provides, what flowmeter or debugging functions for not zero offset capability were defined
Flowmeter also can not automatically be modified the metering performance of flowmeter, and it is non-that work is corrected when terminal system being caused to use data
It is often cumbersome, especially for the flow point not being calibrated, it more cannot achieve data correction；Third, when flowmeter is pacified again
After dress, due to may be impacted to the precision of flowmeter in disassembly process, after the completion of flow meter calibrating is reinstalled,
The revised data of flowmeter can not effectively be verified, the accuracy of flowmeter measurement data still has problem.
Utility model content
The utility model can not monitor flowmeter in real time for existing gas flowmeter calibration method between demarcating twice
Metering performance, lead to not find the offset of flowmeter in time and influence the accuracy of engine performance measuring, and metering
The problems such as can not being verified after intricate operation, calibration, can not be corrected or be corrected to data, design a set of flowmeter calibration system,
The effective monitoring to flowmeter metering performance may be implemented and flowmeter test data is corrected in time, ensure measurement data
It is accurate and reliable.
Technical solution used by the utility model is as follows：
A kind of check device of flowmeter calibration system is detected flowmeter and is mounted on pipeline, and check standard device includes
Proving flowmeter and signal acquisition module, being installed in series on pipeline has tested flowmeter, proving flowmeter and air source.
As a further improvement of the above technical scheme：
The proving flowmeter and tested flowmeter connection signal acquisition module.
The check standard device connection air source and host computer.
The air source includes valve and/or wind turbine；The check standard device further includes frequency converter and PLC, and the PLC connects
Valve is connect, PLC connects wind turbine by frequency converter.
It is also equipped with pneumatic meter-clamping apparatus on the pipeline, is used for the tested flowmeter of fixing pipe road.
Further include second-order correction device, second-order correction device exports after being modified to the detected value for being detected flowmeter.
The second-order correction device is equipped with data correction module and checklist signaling interface, and the tested flowmeter passes through
Checklist signaling interface connects second-order correction device.
The second-order correction device is also equipped with standard scale signaling interface, revise signal output interface and spare interface, mark
Quasi- flowmeter connects second-order correction device by standard scale signaling interface.
The second-order correction device is also equipped with touch screen and wireless communication module.
Further include that standard is traced to the source device and reference signal generator, standard traces to the source device for proving flowmeter, standard
Flowmeter or second-order correction device are traced to the source, and reference signal generator traces back to the signal processing of second-order correction device
Source.
The beneficial effects of the utility model are as follows：
The check device of the flowmeter calibration system of the utility model is by check standard device to the meter of tested flowmeter
Amount performance is verified, and using High-precision standard flowmeter as check standard, precision is high, stability is good, meets internal verify
The real time monitoring to the stability of flowmeter is realized in the requirement of standard, and automatic decision is detected whether flowmeter performance occurs partially
From effectively avoiding tested flowmeter that measurement error occurs between demarcating twice, it is accurate using the data analysis of system to improve terminal
True property.
The secondary calibration device of the flowmeter calibration system of the utility model deviates, for having generated close to error pole
The flowmeter for limiting or having situations such as deviation trend is demarcated using the standard of greater degree device of tracing to the source, and calibration is completed
Nominal data is inputted into second-order correction device afterwards, second-order correction device can be modified data, and makeover process is simple, and
Capability for correcting is strong, and the extremely bad flowmeter of the overproof serious and linearity of error can also be corrected to the precision model needed for client
Within enclosing.It corrects and implements once to verify again after completing, the accuracy of the metering performance of revised flowmeter can be verified, had
Effect ensures that revised data on flows is accurate and reliable.
Meanwhile the utility model traces to the source device and reference signal generator to proving flowmeter and second-order correction using standard
Device carries out integration and traces to the source calibration, effectively avoids the measurement error of proving flowmeter and the signal of second-order correction device itself
It handles error and causes data correction that deviation occurs.
Description of the drawings
Fig. 1 is whole system schematics of the utility model.
Fig. 2 is the structural schematic diagram of the utility model.
Fig. 3 is the structural schematic diagram of the second-order correction device of the utility model.
Fig. 4 is the interface diagram of the second-order correction device of the utility model.
In figure：1, it is detected flowmeter；2, check standard device；3, second-order correction device；4, engine testing system；5, on
Position machine；6, air source；7, standard is traced to the source device；8, reference signal generator；9, pipeline；10, pneumatic meter-clamping apparatus；11, normal flow
Meter；12, valve；13, wind turbine；14, frequency converter；15、PLC；16, signal acquisition module；17, touch screen；18, radio communication mold
Block；19, data correction module；20, checklist signaling interface；21, standard scale signaling interface；22, revise signal output interface；
23, spare interface.
Specific implementation mode
Below in conjunction with the accompanying drawings, illustrate specific embodiment of the present utility model.
As shown in Figure 1, the connection of check standard device 2 of the utility model flowmeter calibration system is detected flowmeter 1, air source
6 and host computer 5, host computer 5 data processing software and database software are installed, for handle data and analyze be detected flow
The performance of meter 1.As shown in Fig. 2, the check standard device 2 of the utility model includes proving flowmeter 11, frequency converter 14, PLC15
And signal acquisition module 16, when check standard device is installed, is installed successively on pipeline 9 and be detected flowmeter 1, pneumatic meter-clamping apparatus
10, proving flowmeter 11, valve 12 and wind turbine 13, wherein valve 12 and wind turbine 13 collectively constitute air source 6, and pneumatic meter-clamping apparatus 10 can
The tested flowmeter 1 of different model and size to be fixed on pipeline 9, this system is made to meet to Multiple Type flow meter calibrating
Demand, proving flowmeter 11 is detachably arranged on pipeline 9.Tested flowmeter 1 and proving flowmeter 11 pass through data line
Connection signal acquisition module 16, flow signal are transferred to host computer 5 by signal acquisition module 16.PLC15 connecting valves 12, and
Wind turbine 13 is connected by frequency converter 14, by the switch angle of control valve 12 and the rotating speed of wind turbine 13, is adjusted in pipeline 9
Gas flow size, and then realize the measurement data of the proving flowmeter 11 and tested flowmeter 1 under acquisition different flow.
It traces to the source device 7 as shown in Figure 1, the flowmeter calibration system of the utility model further includes second-order correction device 3, standard
With reference signal generator 8, standard device 7 of tracing to the source can trace to the source to check standard device 2 and second-order correction device 3, standard
Signal generator 8 traces to the source to the signal processing of second-order correction device 3.Second-order correction device 3 is separately connected by data line
Tested flowmeter 1, check standard device 2 and engine testing system 4.As shown in figure 3, the second-order correction device of the utility model
3 are equipped with touch screen 17, wireless communication module 18 and data correcting module 19, and data correction module 19 passes through built-in algorithm pair
The output data of tested flowmeter 1 is modified, and data correction ability is strong, extremely bad for the overproof serious and linearity of error
Flowmeter can also correct to the accuracy rating needed for client.As shown in figure 4, second-order correction device 3 be also equipped with it is tested
Table signaling interface 20, standard scale signaling interface 21, revise signal output interface 22 and spare interface 23 are detected flowmeter 1 and mark
Quasi- flowmeter 11 connects second-order correction device 3, engine by checklist signaling interface 20 and standard scale signaling interface 21 respectively
Test system 4 connects second-order correction device 3 by revise signal output interface 22, and spare interface 23 is for connecting other signals
Source.Inside second-order correction device 3 can also installation data memory module, the historical data for storing tested flowmeter 1 is convenient
Client tracking analyzes the performance of flowmeter.The second-order correction device 3 of the utility model is using electronic lead sealing, physics lead sealing and sets
Web-privilege password Web triple protection function is set, maloperation or the artificial amendment data for distorting second-order correction device 3 is avoided, improves secondary
The stability and reliability of 3 data correction of correcting device.
Wireless communication module 18 inside the second-order correction device 3 of the utility model has remote transmission function, therefore this
Utility model can by way of wirelessly or non-wirelessly collecting work platform position flow meter data.Meanwhile by radio communication
Module 18 may be implemented remote maintenance functions, the person of being conveniently operated or correcting mechanism remote maintenance system or carry out data analysis,
And embedded software is remotely changed and upgraded according to the needs of client, maintenance process facilitates fast.Moreover, the utility model is secondary
Correcting device 3 has several input channels, and has spare interface 23, and therefore, the utility model not only can be with marked gas quality
Flowmeter, and input flow rate, temperature, pressure etc. can be selected each according to the output signal difference of different type gas flowmeter
A parameter, satisfaction demarcate different types of flowmeter.
When utility model works, completed to the data acquisition of tested flowmeter 1, property by following verification and amendment step
It can analysis and data correction.
The first step verifies the measurement data for being detected flowmeter 1：It is calibrated according to the range of tested flowmeter 1 or needs
Flow measurement range chooses different flux scale fixed points, some flow value is set on host computer 5, by comparing setting value
With the measuring signal of proving flowmeter 11, feedback signal to check standard device 2 PLC15, adjustment valve 12 switch angle and
The rotating speed that wind turbine 13 is adjusted by frequency converter 14, makes the measured value of the gas flow and proving flowmeter 11 in pipeline 9 reach
Setting value after signal stabilization, is detected the measurement data of flowmeter 1 and proving flowmeter 11 by signal acquisition module 16 simultaneously
It is transferred to host computer 5.Then, the gas flow for setting different calibration points successively on host computer 5 acquires quilt under each calibration point
The measured value of flowmeter 1 and proving flowmeter 11 is examined, all data transfers are to host computer 5.
During verification, flow is carried out with the mode that 12 aperture of control valve is combined by using 13 rotating speed of wind turbine is adjusted
Control so that the change process of gas flow is very fast and highly stable in pipeline 9, and test period is greatly saved, to
Save experimentation cost.It is of course also possible to which wind turbine 13 or valve 12 is used alone for adjusting the flow in pipeline.
Second step analyzes the measurement performance for being detected flowmeter 1：After data check is completed, at the data inside host computer 5
It manages software and passes through the difference of the measurement data of tested flowmeter 1 and proving flowmeter 11 under the different calibration points of comparison, automatic decision
Whether the metering performances such as the error of tested flowmeter 1, repeatability, linear exceed critical field, and it is upper to verify data deposit
Database software in machine 5 as the historical data of 1 metering performance of tested flowmeter, while utilizing the history number of all previous verification
According to the metering performance tendency chart a for being detected flowmeter 1 is drawn, to being detected the stability implementing monitoring of flowmeter 1.If tested flow
The measurement performance of meter 1 is met the requirements, then can be continuing with；If it find that generated deviation, close to the limit of error or have partially
Situations such as from trend, then need using greater degree standard trace to the source device 7 carry out next step calibration and correct work.This practicality
It is novel that the metering performance for being detected flowmeter 1 is verified by check standard device 2, the high-precision in check standard device 2
Proving flowmeter 11 is used as check standard, and precision is high, stability is good, meets the requirement of internal check standard, may be implemented simultaneously
To the real time monitoring of flowmeter performance, avoids tested flowmeter 1 that metering occurs between the calibration twice of existing fixed cycle and miss
Difference, and then influence the data analysis that terminal uses system.
Third walks, calibration and amendment：Certainly, terminal can also be confirmed using client by other methods is detected flowmeter 1
Aberrations in property occurs, or the flowmeter performance analysis of above two step need not be carried out, and directly to being detected flowmeter 1 into rower
Fixed and amendment.If the metering performance appearance of tested flowmeter 1 is overproof or client needs to calibrate when being detected flowmeter 1, lead to
The standard of mistake trace to the source device 7 implement calibration.Tested flowmeter 1 and standard device 7 of tracing to the source are connected in same gas circuit, test one group
The tested flowmeter 1 and standard of different flow calibration point are traced to the source the measurement data of device 7, obtain tested flowmeter 1 and standard is traced back
Difference in flow of the source device 7 in different calibration points.This group of difference in flow will be demarcated as nominal data, operating personnel by touch screen 17
Data input second-order correction device 3, and the data correction module 19 of second-order correction device 3 is according to built-in algorithm to being detected flowmeter
1 measurement data automatic implementation amendment, revised data are exported by the revise signal output interface 22 of second-order correction device 3
To engine testing system 4 or host computer 5.
4th step verifies correction result：It corrects after completing, traces to the source in standard and carry out second on device 7 and demarcate, it will be by
The signal output connection second-order correction device 3 of flowmeter 1 is examined, second-order correction device 3 carries out the measurement data for being detected flowmeter 1
It corrects and output modifier, compares correction value and standard is traced to the source the standard value of device 7, whether verification correction result meets the requirements,
It completes to demarcate if meeting the requirements, calibration point is reselected if being unsatisfactory for requiring or increases calibration point, re-start the
The calibration and amendment of three steps, until meeting the requirements.
After the tested calibration of flowmeter 1 is completed, the correction value that second-order correction device 3 exports is shown as flowmeter 1 is detected
Flow value feeds back to host computer 5.Verification is re-started using check standard device 2 according to the first step and the method for second step, it will
The measured value of the calibrated correction value of 4th step and proving flowmeter 11 is stored in database, draws the metering performance trend of correction value
Scheme b.If user is equipped with second-order correction device 3, it is detected the stability of flowmeter 1 by metering performance tendency chart b monitoring, two
The correction value that secondary correcting device 3 exports inputs engine testing system 4, judges that flow uses for engine testing system 4, this is repaiied
Positive value measures the signal of flow as tested flowmeter 1；If user is not equipped with second-order correction device 3, become by metering performance
The a monitoring of gesture figure is detected the stability of flowmeter 1, and the flow signal of tested flowmeter 1 is transferred to engine testing system 4.
5th step traces to the source to check standard device 2 and second-order correction device 3：It is periodically right using standard device 7 of tracing to the source
The proving flowmeter 11 of second-order correction device 3 and check standard device 2 is traced to the source, and with reference signal generator 8 to two
The signal processing precision of secondary correcting device 3 is traced to the source, and the measurement error of proving flowmeter 11 itself and secondary is effectively avoided
The signal processing error of correcting device 3 itself causes to introduce systematic error during data correction, and it is modified to improve measurement data
Accuracy.3 precision of second-order correction device reachable ± 0.02% by calibration of tracing to the source, the uncertainty introduced to DATA REASONING can
To ignore.
The utility model is all automatically performed data by automation control software systems and receives in verification and calibration process
Collection and amendment, make system automation degree greatly improve, and the data processing software of 5 inside installation of host computer and database are soft
Part can automatically record experiment process data, generate test card and analysis data, and automatically record the data verified every time, paint
Metering performance tendency chart processed realizes the automatic monitoring to every flowmeter, improves working efficiency.The utility model can not only answer
In engine testing system, any test system using gas flowmeter can also be applied to.
Above description is the explanation to the utility model, is not the restriction to utility model, without prejudice to the utility model
In the case of spirit, the utility model can make any type of modification.
Claims (10)
1. a kind of check device of flowmeter calibration system is detected flowmeter（1）Mounted on pipeline（9）On, it is characterised in that：Core
Look into standard set-up（2）Including proving flowmeter（11）And signal acquisition module（16）, in pipeline（9）On be installed in series and have tested stream
Gauge（1）, proving flowmeter（11）And air source（6）.
2. the check device of flowmeter calibration system described in accordance with the claim 1, it is characterised in that：The proving flowmeter
（11）With tested flowmeter（1）Connection signal acquisition module（16）.
3. the check device of flowmeter calibration system described in accordance with the claim 1, it is characterised in that：The check standard device
（2）Connect air source（6）And host computer（5）.
4. the check device of flowmeter calibration system described in accordance with the claim 1, it is characterised in that：The air source（6）Including
Valve（12）And/or wind turbine（13）；The check standard device（2）It further include frequency converter（14）And PLC（15）, the PLC
（15）Connecting valve（12）, PLC（15）Pass through frequency converter（14）Connect wind turbine（13）.
5. the check device of flowmeter calibration system described in accordance with the claim 1, it is characterised in that：The pipeline（9）It is upper to go back
Pneumatic meter-clamping apparatus is installed（10）, for fixing pipeline（9）On tested flowmeter（1）.
6. the check device of flowmeter calibration system described in accordance with the claim 1, it is characterised in that：It further include second-order correction dress
It sets（3）, second-order correction device（3）To being detected flowmeter（1）Detected value be modified after export.
7. the check device of flowmeter calibration system according to claim 6, it is characterised in that：The second-order correction device
（3）Data correction module is installed（19）With checklist signaling interface（20）, the tested flowmeter（1）Pass through checklist signal
Interface（20）Connect second-order correction device（3）.
8. the check device of flowmeter calibration system according to claim 6, it is characterised in that：The second-order correction device
（3）It is also equipped with standard scale signaling interface（21）, revise signal output interface（22）And spare interface（23）, proving flowmeter
（11）Pass through standard scale signaling interface（21）Connect second-order correction device（3）.
9. the check device of flowmeter calibration system according to claim 6, it is characterised in that：The second-order correction device
（3）It is also equipped with touch screen（17）And wireless communication module（18）.
10. the check device of flowmeter calibration system according to claim 6, it is characterised in that：Further include that standard is traced to the source
Device（7）And reference signal generator（8）, standard traces to the source device（7）For to proving flowmeter（11）, proving flowmeter（11）
Or second-order correction device（3）It traces to the source, reference signal generator（8）To second-order correction device（3）Signal processing carry out
It traces to the source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820255256.0U CN207798220U (en) | 2018-02-13 | 2018-02-13 | The check device of flowmeter calibration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820255256.0U CN207798220U (en) | 2018-02-13 | 2018-02-13 | The check device of flowmeter calibration system |
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| Publication Number | Publication Date |
|---|---|
| CN207798220U true CN207798220U (en) | 2018-08-31 |
Family
ID=63276261
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820255256.0U Active CN207798220U (en) | 2018-02-13 | 2018-02-13 | The check device of flowmeter calibration system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195447A (en) * | 2018-02-13 | 2018-06-22 | 无锡慧联流体技术有限公司 | flowmeter calibration system and calibration method |
| CN112649077A (en) * | 2020-12-30 | 2021-04-13 | 金卡智能集团股份有限公司 | Automatic calibration method, device and equipment for flow point and storage medium |
| CN117740121A (en) * | 2024-02-20 | 2024-03-22 | 成都睿宝电子科技有限公司 | Automatic calibration device and calibration method for flowmeter |
-
2018
- 2018-02-13 CN CN201820255256.0U patent/CN207798220U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195447A (en) * | 2018-02-13 | 2018-06-22 | 无锡慧联流体技术有限公司 | flowmeter calibration system and calibration method |
| CN112649077A (en) * | 2020-12-30 | 2021-04-13 | 金卡智能集团股份有限公司 | Automatic calibration method, device and equipment for flow point and storage medium |
| CN117740121A (en) * | 2024-02-20 | 2024-03-22 | 成都睿宝电子科技有限公司 | Automatic calibration device and calibration method for flowmeter |
| CN117740121B (en) * | 2024-02-20 | 2024-06-04 | 成都睿宝电子科技有限公司 | Automatic calibration device and calibration method for flowmeter |
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| TR01 | Transfer of patent right |
Effective date of registration: 20200304 Address after: 214000, No. 8 Xin Dong Road, Ting Ting, Xishan District, Jiangsu, Wuxi Co-patentee after: Wuxi Research Institute of Nanjing University of Aeronautics & Astronautics Patentee after: Wuxi measuring and Testing Institute Address before: 214187 Hui Chang Road, Huishan District, Wuxi, Jiangsu Province, No. 28 Co-patentee before: Wuxi Research Institute of Nanjing University of Aeronautics & Astronautics Patentee before: Wuxi Hui Lian Fluid Technology Co., Ltd. Co-patentee before: Wuxi measuring and Testing Institute |
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