CN108731755A - A kind of high precision wide range gas flow surveying instrument - Google Patents
A kind of high precision wide range gas flow surveying instrument Download PDFInfo
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- CN108731755A CN108731755A CN201710277598.2A CN201710277598A CN108731755A CN 108731755 A CN108731755 A CN 108731755A CN 201710277598 A CN201710277598 A CN 201710277598A CN 108731755 A CN108731755 A CN 108731755A
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- branch
- measurement
- flowmeter
- gas flow
- wide range
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F7/00—Volume-flow measuring devices with two or more measuring ranges; Compound meters
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of high precision wide range gas flow surveying instruments, the high precision wide range gas flow surveying instrument includes at least two measurement branches, each to measure branch shorted on one end to connect an interface for connecting air source to be measured, every measurement branch road swims over to downstream from above and is equipped with corresponding switch valve and flowmeter successively.The invention also includes Measurement and Control System, the Measurement and Control System connects each switch valve by control circuit control and connects each flowmeter by sampling circuit sampling.The present invention uses a plurality of measurement branch, and the quantity for measuring branch can be increased as needed, it can realize that the when of measuring gas flow automatically selects measurement branch by the processing of Measurement and Control System, the degree of automation is higher, it solves the problems, such as to cause measurement result inaccurate because of dismounting, flow rate test precision is improved, measuring device measuring range in high accuracy has been expanded.
Description
Technical field
The invention belongs to gas flow measurement fields, and in particular to a kind of high precision wide range gas flow surveying instrument.
Background technology
Different types of gas can be all used in many fields at present, in use to the accurate of gas flow
Measurement is particularly important.Such as commercial car braking system mostly uses gas braking, needs vehicle-mounted air source to carry compressed air to be
Braking provides brake force.And commercial car itself is there are vehicle type is more, the big spy of technical parameter difference between vehicle and vehicle
Point, therefore vehicle-mounted air supply system is directed to the capacity significant difference of different types of vehicle configuration, and air source gas production is tested
Experiment test device need very wide measuring range in high accuracy.
Existing measurement method is laboratory carries out air supply system capacity detection using single flowmeter, but due to gas
Flowmeter precise measurement range is relatively narrow, often lead to small gas production air source or big gas production air source detection data fall flowmeter most
Except good measurement accuracy section, cause measurement error larger, cannot accurately carry out flow measurement.In order to accurately measure, can adopt
With the flowmeter of different accuracy range, the flowmeter of different accuracy range is selected for different flows, but this method needs
Flowmeter is frequently dismounted, causes measurement gas circuit to be susceptible to leakage, and experiment time is long, the degree of automation is low, examination
It is poor to test consistency, human error is larger, eventually leads to measurement result inaccuracy.
Invention content
It is existing in the prior art for solving the present invention provides a kind of high precision wide range gas flow surveying instrument
Because dismounting flowmeter leads to the technical problem of measurement result inaccuracy.
The technical scheme adopted by the invention to solve the technical problem is that：
A kind of high precision wide range gas flow surveying instrument：Include the controller with operational capability, controller passes through
Sampling circuit sampling connection flowmeter, acquires the measurement data of flowmeter and carries out analyzing processing, the controller passes through control
Circuit controls connecting valve valve, and controller being opened and turning off according to the analysis and processing result controlling switch valve to measurement data.
Further, described device includes at least two measurement branches, and each branch shorted on one end that measures is to connect a use
In the interface for connecting air source to be measured, every measurement branch road swims over to downstream from above and is equipped with corresponding switch valve and flowmeter successively,
The switch valve measures the conducting and disconnection of branch where being used to control, the precision interval of each flowmeter for measuring branch is each
It differs.
Further, the switch valve is solenoid valve.
Further, the precision interval of each flowmeter is engaging one another continuously distributed.
Further, further include a flow bigness scale branch, the flow bigness scale branch one end and each measurement branch
Shorted end connects, which swims over to downstream from above and be equipped with bigness scale switch valve and bigness scale flowmeter successively.
Advantageous effect using the present invention is：The present invention realizes the processing to measurement data by controller, being capable of basis
Handling result controlling switch valve is opened and shut off, and is measured branch to achieve the purpose that automatically select, is improved measurement result
Accuracy, high degree of automation.
The present invention uses a plurality of measurement branch, and can increase the quantity for measuring branch as needed, and every measures branch
The switch valve that road is equipped with the flowmeter in different accuracy section and control place measures branch conducting and disconnects, is opened by controlling
It closes valve corresponding flowmeter access system can be realized or cut out system, avoids cumbersome disassembling section, solve because tearing open
Dress leads to the problem of measurement result inaccuracy.
A bigness scale branch can also be increased, the bigness scale flowmeter in the bigness scale branch is the work for playing " stepping "
With --- then the effect for dividing range of flow corresponds to the measurement branch conducting of range of flow, you can complete to measure.This side
Formula can avoid the access times to certain measurement branch more, and in addition the access times of several measurement branches are few, make each measurement
The flowmeter service life of branch is balanced.
Description of the drawings
Fig. 1 is the fundamental diagram of the high precision wide range gas flow surveying instrument of the present invention；
Fig. 2 is the system construction drawing of the embodiment of the present invention 1；
Fig. 3 is the system construction drawing of the embodiment of the present invention 2.
Specific implementation mode
The present invention is described further below in conjunction with the accompanying drawings.
The present invention provides a kind of high precision wide range gas flow surveying instruments, as shown in Figure 1, the gas flow measurement
Device includes flow measurement control system, flow range switching system and Flow Measuring System, is tested air source by testing gas circuit
It links together with flow range switching system, flow range switching system is connected to one by switching gas circuit and Flow Measuring System
It rises.Flow measurement control system is linked together by control circuit and flow range switching system, switches system by flow range
System executes the switching action order of flow measurement control system.
Flow measurement control system is bound up by sampling circuit and Flow Measuring System, passes through Flow Measuring System
Flow measurement information is acquired, the information that Flow Measuring System measures is handled by flow measurement control system, is controlled
The action of flow range switching system and it is finally completed measurement.
Embodiment 1
As shown in Fig. 2, the gas that the high precision wide range gas flow surveying instrument of the present embodiment measures comes from tested gas
Source air compressor machine A, flow measurement control system E are the controller for having operational capability, measuring range switching system include V1, V2,
Tri- solenoid valves of V3, Flow Measuring System are made of tri- flowmeters of B, C, D, described solenoid valve V1, V2, V3 respectively with B, C, D
Three flowmeters, which correspond to constitute, measures branch, and the conducting and disconnection of branch are measured where the solenoid valve control.
The flowmeter is 0- according to high-precision section gradient, continuous arrangement, such as flowmeter B ranges described in the present embodiment
600L/min, high-acruracy survey section are 200L/min-300L/min；The flowmeter C ranges are 0-300L/min, high-precision
Surveying range is 100L/min-200L/min；The flowmeter D ranges are 0-100L/min, and high-acruracy survey section is 0L/
min-100L/min。
Specific work process is as follows：
The judgement link of flow range is carried out when measurement first.The solenoid valve V1 is opened at this time, and solenoid valve V2 and V3 are closed
It closes, the gas that the high precision wide range gas flow surveying instrument acquisition air source A generates passes through flow range switching system
V1 solenoid valves are transferred to Flow Measuring System, are measured by flowmeter B, and measured value is transferred to flow by signal line and surveys
Amount control system, flow measurement control system carry out processing judgement, if measured value is in the high-precision section of flowmeter B, then
Flow measurement control system judgement flow range judgement link terminates, and the measured value is the exact value measured.Such as
Fruit measured value is not or not the high-precision section of flowmeter B, then flow measurement control system sends out control signal, controls flow range
Switching system closes solenoid valve V1, opens solenoid valve V2, so that tested gas is measured by flowmeter C, measured value passes through letter
Number circuit is transferred to flow measurement control system, and flow measurement control system carries out processing judgement, as measured value is in flow
The high-precision section of C is counted, then flow measurement control system judgement flow range judgement link terminates, and the measured value is to survey
The exact value measured.If measured value is not or not the high-precision section of flowmeter C, flow measurement control system sends out control
Signal, control flow range switching system close solenoid valve V2, open solenoid valve V3, and tested gas is made to be surveyed by flowmeter D
Amount.
Above-described embodiment is to measure branch gradually from large range measuring Zhi Luxiang small-ranges according to flow range switching system
The mode of switching of successively decreasing measures, and as another embodiment of the invention, the high precision wide range gas stream measures
The gas that device acquisition air source generates is measured, can also be first transmitted in any one branch and measure, such as be transmitted to stream
Branch where gauge C, remaining branch realize disconnection by closing solenoid valve.If flowmeter C has measured value, by the measurement
Numerical value is transferred to flow measurement control system and is handled, and if measured value is in the high-precision section of flowmeter C, then flow is surveyed
Amount control system judgement flow range judgement link terminates, and the measured value is the exact value measured, if measured
Numerical value is not or not the high-precision section of flowmeter C, then flow measurement control system is by the height of measured value and remaining bypass flow meter
Precision interval is compared one by one, judges that the numerical value is in the high-precision section of which bypass flow meter, such as judging result
It is the high-precision section that the measured value is in flowmeter B, then opens solenoid valve V1, closes remaining solenoid valve, conducting flowmeter B
Place branch measures gas by the branch.If flowmeter C does not obtain measured value when measuring, illustrate gas flow
Range beyond flowmeter C, the solenoid valve V2 of flow measurement control system closing at this time, disconnects branch where flowmeter C, same to time control
Flow range switching system processed is opened arbitrary bigger range measurement branch and is measured, and repeats above-mentioned measuring process, until most
It completes to measure afterwards.
Embodiment 2
Further include a flow bigness scale branch in system, the flow is thick as shown in figure 3, being differed only in embodiment 1
It surveys branch one end to connect with each shorted end for measuring branch, which swims over to downstream from above and be equipped with successively slightly
Survey the bigness scale flowmeter F of solenoid valve V0 and a wide range.Front opening bigness scale solenoid valve is measured, remaining solenoid valve is closed, it is described
High precision wide range gas flow surveying instrument acquires the gas that air source generates, and the bigness scale branch is first transmitted to, by bigness scale
Flowmeter F carries out preliminary surveying, and measured value is transferred to flow measurement control system, flow measurement control system by sampling circuit
The measured value and all high-precision sections for measuring bypass flow meter are compared by system one by one, are judged high residing for measured value
Precision interval is then shut off bigness scale solenoid valve, opens the solenoid valve of high-precision interval measure branch residing for measured value, makes the survey
Branch conducting is measured, gas is measured, the numerical value measured is exact value.
Bigness scale flowmeter in the bigness scale branch plays the role of " stepping " --- the effect of range of flow is divided, so
The measurement branch of corresponding range of flow is connected according to range residing for measurement result for controller afterwards, you can completes to measure.This side
Formula can avoid the access times to certain measurement branch more, and in addition the access times of several measurement branches are few, make each measurement
The flowmeter service life of branch is balanced.
Claims (5)
1. a kind of high precision wide range gas flow surveying instrument, it is characterised in that：Include the controller with operational capability, institute
Flowmeter of the controller by sampling circuit sampling connection for measuring gas flow is stated, controller acquires flowmeter to gas to be measured
The measurement data of body simultaneously carries out analyzing processing, and the controller controls connecting valve valve by control circuit, and controller is according to right
The analysis and processing result controlling switch valve of measurement data being opened and turning off.
2. high precision wide range gas flow surveying instrument according to claim 1, it is characterised in that：The switch valve and
The flowmeter constitutes at least two measurement branches, and every measurement branch road swims over to downstream from above and sets gradually corresponding switch
Valve and flowmeter, each to measure branch shorted on one end to connect an interface for connecting air source to be measured, the switch valve is used for
The conducting and disconnection of branch are measured where control, the precision interval of each flowmeter for measuring branch is different.
3. high precision wide range gas flow surveying instrument according to claim 1 or 2, it is characterised in that：The switch
Valve is solenoid valve.
4. high precision wide range gas flow surveying instrument according to claim 1 or 2, it is characterised in that：Each stream
The precision interval of gauge is engaging one another continuously distributed.
5. high precision wide range gas flow surveying instrument according to claim 1 or 2, it is characterised in that：Further include one
A flow bigness scale branch, the flow bigness scale branch one end are connect with each shorted end for measuring branch, the flow bigness scale branch
On swum over to from above downstream successively be equipped with bigness scale switch valve and bigness scale flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710277598.2A CN108731755A (en) | 2017-04-25 | 2017-04-25 | A kind of high precision wide range gas flow surveying instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710277598.2A CN108731755A (en) | 2017-04-25 | 2017-04-25 | A kind of high precision wide range gas flow surveying instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108731755A true CN108731755A (en) | 2018-11-02 |
Family
ID=63934785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710277598.2A Withdrawn CN108731755A (en) | 2017-04-25 | 2017-04-25 | A kind of high precision wide range gas flow surveying instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN108731755A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113597540A (en) * | 2019-03-18 | 2021-11-02 | Avl 李斯特有限责任公司 | Measuring system for measuring mass flow, density, temperature and/or flow velocity |
| CN118130727A (en) * | 2024-05-06 | 2024-06-04 | 中国原子能科学研究院 | Measurement of CO2Purity system and method |
| CN118223864A (en) * | 2024-05-22 | 2024-06-21 | 中煤科工集团沈阳研究院有限公司 | Automatic multistage drilling flow attenuation coefficient tester and use method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202109938U (en) * | 2011-05-31 | 2012-01-11 | 上海科洋科技发展有限公司 | Wide range flow measuring device |
| CN103868559A (en) * | 2014-03-28 | 2014-06-18 | 中冶南方工程技术有限公司 | Parallel installation and segmental measurement flow measurement method with large measurement range ratio and device thereof |
-
2017
- 2017-04-25 CN CN201710277598.2A patent/CN108731755A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202109938U (en) * | 2011-05-31 | 2012-01-11 | 上海科洋科技发展有限公司 | Wide range flow measuring device |
| CN103868559A (en) * | 2014-03-28 | 2014-06-18 | 中冶南方工程技术有限公司 | Parallel installation and segmental measurement flow measurement method with large measurement range ratio and device thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113597540A (en) * | 2019-03-18 | 2021-11-02 | Avl 李斯特有限责任公司 | Measuring system for measuring mass flow, density, temperature and/or flow velocity |
| CN118130727A (en) * | 2024-05-06 | 2024-06-04 | 中国原子能科学研究院 | Measurement of CO2Purity system and method |
| CN118130727B (en) * | 2024-05-06 | 2024-09-06 | 中国原子能科学研究院 | Measurement of CO2Purity system and method |
| CN118223864A (en) * | 2024-05-22 | 2024-06-21 | 中煤科工集团沈阳研究院有限公司 | Automatic multistage drilling flow attenuation coefficient tester and use method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 6, Yutong Road, Guancheng Hui District, Zhengzhou, Henan 450061 Applicant after: Yutong Bus Co.,Ltd. Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Applicant before: ZHENGZHOU YUTONG BUS Co.,Ltd. |
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181102 |