CN106908121B - Water flow Detection of Stability method and detection system in a kind of flow apparatus - Google Patents
Water flow Detection of Stability method and detection system in a kind of flow apparatus Download PDFInfo
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- CN106908121B CN106908121B CN201710035834.XA CN201710035834A CN106908121B CN 106908121 B CN106908121 B CN 106908121B CN 201710035834 A CN201710035834 A CN 201710035834A CN 106908121 B CN106908121 B CN 106908121B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 195
- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 230000000087 stabilizing Effects 0.000 claims abstract description 24
- 238000005303 weighing Methods 0.000 claims description 28
- 230000001105 regulatory Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 238000003745 diagnosis Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000005070 sampling Methods 0.000 description 5
- 229910004682 ON-OFF Inorganic materials 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 238000001595 flow curve Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000001702 transmitter Effects 0.000 description 2
- 210000001513 Elbow Anatomy 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 238000004166 bioassay Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/14—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a weighing apparatus
Abstract
The invention discloses water flow Detection of Stability method and detection system in a kind of flow apparatus, method flows through the water flow of running flow apparatus by obtaining；The stability of flow value of present flow rate device is determined according to the value of water flow；If learning that stability of flow value is greater than the set value through judgement, stability of flow linearity curve is obtained according to the value of water flow, obtains the motor stabilizing linearity curve of the pump motor run in present flow rate device；According to stability of flow linearity curve and motor stabilizing linearity curve, the equipment for causing water flow unstable is determined in present flow rate device.System includes water flow acquiring unit, stability of flow value determination unit, stability curve determination unit and the equipment determination unit for causing water flow unstable.The present invention can know unstable defect existing for the water flow in flow apparatus in time and accurately, and the equipment for causing the unstable defect is accurately known according to unstable defect, and then realize the timely maintenance of the flow apparatus unstable to water flow.
Description
Technical field
The present invention relates to water flow detection technique fields, and in particular to water flow Detection of Stability side in a kind of flow apparatus
Method and detection system.
Background technique
Discharge stability is an important technical indicator in flow apparatus, it influence flow instrument coefficient calibration with
Repeatability.Since there are many factor for influencing discharge stability, therefore the equipment for quickly judging that stability is bad in flow apparatus is non-
It is often important.The discharge stability of flow apparatus mainly with water pump water supply system, underwater bubble, pipe-line system structure, pipeline processing
The factors such as technique, instrument installation, valve, Signal sampling and processing are related.
(1) water pump water supply system
It is bad to will lead to discharge stability for water pump blade dither and motor speed change in water pump water supply system, are filling
Set in pipe-line system installation pressure stabilizing getter container, smooth dither, while the bubble in water is reduced to discharge stability
Influence.
Pump motor rotation speed change is mainly influenced by factors such as mains frequency ripple, water pump load variations, in control system
It is middle that invariablenes turning speed is realized using pump motor speed feedback.
(2) pipe-line system structure: when design pipe-line system, the local choked flow piece such as elbow, valve is reduced, while using flow field
Design of Simulation method realizes collecting pipe structural dimension optimization, guarantees device discharge stability.
(3) pipeline processing technique: guarantee the flatness of flange and pipeline straight pipe interface.
(4) instrument is installed: guaranteeing concentricity and angle when instrument is installed, gasket installation can not be projected into pipeline.
(5) valve: spool positioning is bad to cause flow to increase or fluctuate.
(6) it signal acquisition and processing system: is protected using independent ground wire, Anti-interference Design scheme and precision pulse method of counting
Demonstrate,prove the authenticity of data acquisition.
In the instability of flow factor of the above flow apparatus, because pipe-line system structure, pipeline processing technique and installation are drawn
The discharge stability risen can control in design and construction, and exclusive method is used during the installation and debugging of device
It can determine unstable factor.However the equipment in flow apparatus, such as multiple valves, water pump, instrument, occur in use
Problem directly affects discharge stability, therefore it is very heavy to identify which equipment affects the discharge stability of flow apparatus rapidly
It wants.
The discharge stability judgment method of current flux device is to carry out flow by data acquisition and data processing system
Calculate, discharge stability calculate, if discharge stability beyond setting numerical value, ask professional technician to Solve on site this
Problem, but such method exists because flow apparatus discharge stability difference is found not in time or professional technician goes field assay to make
At detection not in time and inaccuracy technological deficiency.
Summary of the invention
For the defects in the prior art, the present invention provides water flow Detection of Stability method and inspection in a kind of flow apparatus
Examining system can know unstable defect existing for the water flow in flow apparatus in time and accurately, and can be according to shakiness
Determine defect and accurately know the equipment for causing the unstable defect, and then realizes the timely of the flow apparatus unstable to water flow
Maintenance.
In order to solve the above technical problems, the present invention the following technical schemes are provided:
On the one hand, the present invention provides a kind of water flow Detection of Stability methods in flow apparatus, which comprises
Obtain the water flow for flowing through running flow apparatus；
The stability of flow value of present flow rate device is determined according to the value of the water flow；
If the stability of flow value not setting value in setting numberical range is learnt through judgement, according to the water flow
Value obtains stability of flow linearity curve, and obtains the motor stabilizing linearity curve of the pump motor run in present flow rate device；
And according to the stability of flow linearity curve and motor stabilizing linearity curve, determination causes in present flow rate device
The unstable equipment of water flow.
It is further, described to obtain the water flow for flowing through running flow apparatus, comprising:
In flow apparatus operation, the pulse reading of the standard scale in the flow apparatus is periodically acquired；
And the instrument coefficient according to the standard scale, each pulse reading that will acquire, which is converted into, flows through operation
In flow apparatus water flow value.
Further, the stability of flow value of present flow rate device is determined according to the value of the water flow, comprising:
According to the value of the water flow, the flow average value of present flow rate device is obtained；
And the stability of flow value of present flow rate device is determined according to the flow average value.
Further, if described learn the stability of flow value not in setting numberical range through judgement, according to
Water flow value obtains stability of flow linearity curve, and the stability for obtaining the pump motor run in present flow rate device is bent
Line, comprising:
If the stability of flow value through judging to learn in present flow rate device is more than setting value, according to the value of the water flow
Draw stability of flow linearity curve；
In currently running flow apparatus, the tachometer value of running pump motor is periodically acquired；
And the tachometer value according to the pump motor, draw the motor stabilizing linearity curve of the pump motor.
Further, it according to the stability of flow linearity curve and motor stabilizing linearity curve, is determined in present flow rate device
Cause the equipment that water flow is unstable, comprising:
According to the stability of flow linearity curve and motor stabilizing linearity curve, the rotation speed change trend of the pump motor
With the fluctuating change trend of water flow；
If the rotation speed change trend of the pump motor is identical as the fluctuating change trend of water flow, it is determined that cause current
The unstable equipment of water flow is water pump, shaft joint or the encoder in present flow rate device.
Further, it according to the stability of flow linearity curve and motor stabilizing linearity curve, is determined in present flow rate device
Cause the equipment that water flow is unstable, further includes:
Judge the type of the fluctuating change trend of presently described stability of flow linearity curve, wherein the fluctuating change trend
Type include: up and down and fluctuation；
If the type of fluctuating change trend is to rise, it is determined that the equipment for causing current water flow unstable is present flow rate
The switch valve on Trunk Line in device；
If the type of fluctuating change trend is decline, it is determined that the equipment for causing current water flow unstable is present flow rate
By-passing valve in device；
It, will be according to the standard scale and weighing system point in present flow rate device if the type of fluctuating change trend is fluctuation
The stability of flow linearity curve not obtained is compared, and the equipment for causing water flow unstable is determined according to comparison result.
Further, described will be according to the standard scale and the flow that obtains respectively of flow weighing system in present flow rate device
Stability curve is compared, before further include:
In flow apparatus operation, the weight readings of the water in the flow apparatus are periodically acquired；
And the time of the weighing system is flowed into according to water, each weight readings that will acquire, which are converted into, to be flowed through
The water flow value of running flow apparatus.
Further, described will be according to the standard scale and the flow that obtains respectively of flow weighing device in present flow rate device
Stability curve is compared, and the equipment for causing water flow unstable is determined according to comparison result, comprising:
Judgement learns that the fluctuating change of the stability of flow linearity curve obtained respectively according to the standard scale and weighing system becomes
Whether gesture is identical；
If so, determining that the equipment for causing current water flow unstable is the regulating valve in present flow rate device；
Otherwise, it is determined that Current standards table failure.
Further, it according to the stability of flow linearity curve and motor stabilizing linearity curve, is determined in present flow rate device
Cause the equipment that water flow is unstable, later further include:
The equipment for causing water flow unstable in determining present flow rate device is marked；
And the equipment for causing water flow unstable according to the label lookup, and to the equipment carry out maintenance or
Replacement operation.
On the other hand, the present invention also provides water flow Detection of Stability system, the detection systems in a kind of flow apparatus
System includes:
Water flow acquiring unit, for obtaining the water flow for flowing through running flow apparatus；
Stability of flow value determination unit, for determining the stability of flow of present flow rate device according to the value of the water flow
Value；
Stability curve determination unit, for through judgement learn that the stability of flow value is greater than the set value when, according to institute
The value for stating water flow obtains stability of flow linearity curve, and obtains the stability of the pump motor run in present flow rate device
Curve；
Cause the equipment determination unit that water flow is unstable, for according to the stability of flow linearity curve and stability
Curve determines the equipment for causing water flow unstable in present flow rate device.
As shown from the above technical solution, water flow Detection of Stability method and inspection in a kind of flow apparatus of the present invention
Examining system, method flow through the water flow of running flow apparatus by obtaining；Determine that present flow rate fills according to the value of water flow
The stability of flow value set；If learning that stability of flow value is greater than the set value through judgement, stability of flow is obtained according to the value of water flow
Linearity curve obtains the motor stabilizing linearity curve of the pump motor run in present flow rate device；According to stability of flow linearity curve and
Motor stabilizing linearity curve determines the equipment for causing water flow unstable in present flow rate device.System includes that water flow obtains
Unit, stability of flow value determination unit, stability curve determination unit and the equipment determination unit for causing water flow unstable.This
Invention can know unstable defect existing for the water flow in flow apparatus in time and accurately, and quasi- according to unstable defect
Really know the equipment for causing the unstable defect, and then realizes the timely maintenance of the flow apparatus unstable to water flow.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it is therefore apparent that the accompanying drawings in the following description is of the invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is a kind of process of specific embodiment of water flow Detection of Stability method in a kind of flow apparatus of the invention
Schematic diagram；
Fig. 2 is a kind of flow diagram of specific embodiment of step 100 in detection method of the invention；
Fig. 3 is a kind of flow diagram of specific embodiment of step 200 in detection method of the invention；
Fig. 4 is a kind of flow diagram of specific embodiment of step 300 in detection method of the invention；
Fig. 5 is a kind of flow diagram of specific embodiment of step 400 in detection method of the invention；
Fig. 6 is a kind of flow diagram of specific embodiment of step 40A and 40B in detection method of the invention；
Fig. 7 is a kind of flow diagram of specific embodiment of step 406 in detection method of the invention；
Fig. 8 is a kind of flow diagram of specific embodiment of step 501 and step 502 in detection method of the invention；
Fig. 9 is the water flow standard apparatus system composition figure in application example of the present invention；
Figure 10 is the flow standard device electrical systematic drawing in application example of the present invention；
Figure 11 is the water system control principle drawing in application example of the present invention；
Figure 12 is the automatic diagnostic flow chart of flow apparatus discharge stability expert system in application example of the present invention；
Figure 13 is a kind of knot of specific embodiment of water flow Detection of Stability system in a kind of flow apparatus of the invention
Structure schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The embodiment of the present invention one provides the specific embodiment party of a kind of water flow Detection of Stability method in flow apparatus
Formula.Referring to Fig. 1, which specifically includes following content:
Step 100: obtaining the water flow for flowing through running flow apparatus.
In this step, according in running flow apparatus water flow weighing device reading or standard scale reading,
In the acquisition of a period periodically and record flows through the water flow of flow apparatus.
Step 200: the stability of flow value of present flow rate device is determined according to the value of the water flow.
In this step, flow is transferred to calibrating flow point, after waiting stability of flow, acquires standard scale umber of pulse, sampling
Time is 1 second, calculates standard scale flow value q=kf, and wherein k is flowmeter instrument coefficient, and f is standard scale output frequency, draws stream
Measure curve.10 flow values are continuously surveyed, one minute every time, respectively obtain q1、q2……q10, discharge stability is based on formula 1 and formula 2
It calculates:
Flow average value:
Discharge stability:
Step 300: if learning that the stability of flow value is greater than the set value through judgement, being obtained according to the value of the water flow
Stability of flow linearity curve, and obtain the motor speed stability curve of the pump motor run in present flow rate device.
In this step, compare the stability of flow value E being calculatedsWith preset value, if stability of flow value EsMore than default
Value, then assert that the water flow in present flow rate device is unstable, and then according to the stability of flow linearity curve and stability
Curve determines the equipment for causing water flow unstable in present flow rate device, otherwise, confirms the water flow in present flow rate device
It measures more stable.
Step 400: according to the stability of flow linearity curve and motor stabilizing linearity curve, determination is drawn in present flow rate device
Play the unstable equipment of water flow.
In this step, according to the stability of flow linearity curve and motor stabilizing linearity curve, the pump motor
The fluctuating change trend of rotation speed change trend and water flow；If the rotation speed change trend of the pump motor and the fluctuation of water flow
Variation tendency is identical, it is determined that the equipment for causing current water flow unstable be present flow rate device in water pump, shaft joint or
Encoder.
As can be seen from the above description, the embodiment of the present invention can know that the water flow in flow apparatus is deposited in time and accurately
Unstable defect, and can accurately know the equipment for causing the unstable defect according to unstable defect, and then realize
The timely maintenance of the flow apparatus unstable to water flow.
The embodiment of the present invention two provides the specific embodiment of step 100 in above-mentioned detection method.Referring to fig. 2, should
Step 100 specifically includes following content:
Step 101: in flow apparatus operation, the pulse for periodically acquiring the standard scale in the flow apparatus is read
Number.
Step 102: according to the instrument coefficient of the standard scale, each pulse reading that will acquire, which is converted into, flows through fortune
The value of the water flow of flow apparatus in row.
As can be seen from the above description, the embodiment of the present invention realizes obtaining to the water flow for flowing through running flow apparatus
It takes, provides accurate data basis for subsequent detecting step.
The embodiment of the present invention three provides the specific embodiment of step 200 in above-mentioned detection method.It, should referring to Fig. 3
Step 200 specifically includes following content:
Step 201: according to the value of the water flow, calculating the flow average value of present flow rate device；
Step 202: the stability of flow value of present flow rate device is determined according to the flow average value.
As can be seen from the above description, the embodiment of the present invention can be accurate according to the value of the water flow and quickly calculates
To the stability of flow value of present flow rate device, and then the stable case of water flow in present flow rate device can be quickly obtained.
The embodiment of the present invention four provides the specific embodiment of step 300 in above-mentioned detection method.Referring to fig. 4, should
Step 300 specifically includes following content:
Step 301: if the stability of flow value through judging to learn in present flow rate device is more than setting value, according to the water
The value of flow draws stability of flow linearity curve.
Step 302: in currently running flow apparatus, periodically acquiring the tachometer value of running pump motor.
Step 303: according to the tachometer value of the pump motor, drawing the motor stabilizing linearity curve of the pump motor.
As can be seen from the above description, the embodiment of the present invention can know that the water flow in flow apparatus is deposited in time and accurately
Unstable defect.
The embodiment of the present invention five provides the specific embodiment of step 400 in above-mentioned detection method.It, should referring to Fig. 5
Step 400 specifically includes following content:
Step 401: according to the stability of flow linearity curve and motor stabilizing linearity curve, the revolving speed of the pump motor
The fluctuating change trend of variation tendency and water flow.
Step 402: if the rotation speed change trend of the pump motor is identical as the fluctuating change trend of water flow, it is determined that
The equipment for causing current water flow unstable is water pump, shaft joint or the encoder in current water system.
Step 403: judging the type of the fluctuating change trend of presently described stability of flow linearity curve, wherein the fluctuation
The type of variation tendency includes: up and down and fluctuation, if the type of fluctuating change trend enters step 404 to rise；
If the type of fluctuating change trend is decline, 405 are entered step；If the type of fluctuating change trend is fluctuation, enter step
Rapid 406.
Step 404: determining the equipment for causing current water flow unstable for opening on the Trunk Line in present flow rate device
Close valve.
Step 405: determining that the equipment for causing current water flow unstable is the by-passing valve in present flow rate device.
Step 406: by according in present flow rate device standard scale and the discharge stability that obtains respectively of weighing system it is bent
Line is compared, and the equipment for causing water flow unstable is determined according to comparison result.
Cause this unstable scarce as can be seen from the above description, the embodiment of the present invention can accurately be known according to unstable defect
Sunken equipment, and then realize the timely maintenance of the flow apparatus unstable to water flow.
The embodiment of the present invention six provides the specific reality of step 40A and 40B in above-mentioned detection method before step 406
Apply mode.Following content is specifically included referring to Fig. 6, step 40A and 40B:
Step 40A: it in flow apparatus operation, periodically acquires in the flow apparatus and flows into weighing system
Claim the weight readings of water container water.
Step 40B: the time that claims water container, each weight readings that will acquire are flowed into the weighing system according to water
It is converted into the value for flowing through the water flow of running flow apparatus.
As can be seen from the above description, the embodiment provides a kind of specific realities for obtaining water flow according to weighing system
Mode is applied, ensure that the accuracy that water flow obtains.
The embodiment of the present invention seven provides the specific embodiment of step 406 in above-mentioned detection method.It, should referring to Fig. 7
Step 406 specifically includes following content:
Step 406-a: judge the fluctuating change for the stability of flow linearity curve that the standard scale and weighing system obtain respectively
Whether trend is identical；If so, entering step 406-b；Otherwise, 406-c is entered step.
406-b: determine that the equipment for causing current water flow unstable is the regulating valve in present flow rate device.
406-c: determine that there are failures for Current standards table.
As can be seen from the above description, the embodiment of the present invention can will according in present flow rate device standard scale and weighing be
The stability of flow linearity curve obtained respectively of uniting efficiently and accurately is compared, and is accurately obtained causing water flow according to comparison result
Measure unstable equipment.
The embodiment of the present invention eight provides the specific implementation of the above-mentioned detection method for further including step 501 and step 502
Mode.Referring to Fig. 8, the step 501 and step 502 specifically include following content:
Step 501: the equipment for causing water flow unstable in determining present flow rate device is marked.
Step 502: the equipment for causing water flow unstable according to the label lookup, and the equipment is safeguarded
Or replacement operation.
As can be seen from the above description, the embodiment of the present invention enables to operator can by the way that equipment is marked
Fast and accurately realize the maintenance or replacement to equipment.
For further instruction this programme, the present invention also provides a kind of water flow Detection of Stability methods in flow apparatus
Application example, the detection method specifically include following content:
Fig. 9 is water flow standard apparatus system composition figure, its working principle is that: industrial personal computer provides calibrating flow value, passes through
PLC program calculation, operation result are sent to frequency converter by 485 communication lines, the operation of Frequency Converter Control pump motor, water pump from
Pool water-pumping, water are cooled down appearance by manual switch valve, filter, bellows, water pump, bellows, check-valves, safety valve, pressure stabilizing
Device, pneumatic on-off valve, checklist, pneumatic on-off valve, pneumatic on-off valve, standard scale, electric control valve, pneumatic on-off valve, weighing
System flows back to pond, and Fig. 9 weighing system has two sets, makes a set of operation therein, every set weighing system by jettron Vavle switching
System is made of weighing entrance switch valve, commutator, title water container, weighing outlet switch valve, electronic scale.Water circulation a period of time,
After waiting stability of flow, the flow value of standard scale is calculated by data Collection & Processing System, is calculated with Bessel Formula
The discharge stability of flow apparatus.
2 electrical system conceptual designs
Water flow standard apparatus electrical system mainly includes water management system, data acquisition process system as shown in Figure 10
System, weighing control system.
(1) water system controlling plan design
Water management system in Figure 10 is by industrial personal computer, PLC, valve, pressure transmitter, frequency converter, pump motor, coding
Device composition.When designing water management system, uses flow feedback, pressure feedback and speed feedback and realize stability of flow, on
Position machine MCGS software programming, schematic diagram are shown in Figure 11, realize that process is as follows:
The corresponding valve selection pipeline to be run is opened in industrial personal computer main interface, gives the flow value and pressure of test
Value, PLC feed back flow value, given pressure value, pressure transmitter feedback pressure force value, meter according to given stream magnitude, proving flowmeter
It calculates deviation and is automatically converted to frequency values by PID arithmetic, by 485 communications, automatic adjustment frequency converter frequency control water pump electricity
Machine operation, while valve aperture is automatically adjusted, pump motor tach signal is converted to tachometer value, works as stream by encoder output
Magnitude and deviation from the index value are 1%, adjust ring into pressure, when pressure feedback value and deviation from the index value are 0.5%, into turning
Fast closed-loop control system.
(2) discharge stability signal acquiring and processing system designs
Discharge stability signal acquiring and processing system mainly completes the acquisition and calculating of data on flows, the signal in Figure 10
Acquisition system is made of industrial personal computer, PCI1780 board, pulse distribution pinboard, standard scale.Pulse distribution pinboard has isolation
Feedback flow control is participated in into PLC all the way with the signal of one-to-two function, the output of pulse distribution pinboard, another way signal is into work
Control machine realizes that discharge stability calculates and the mark of flowmeter examines work.
Discharge stability calculates: flow is transferred to calibrating flow point, after waiting stability of flow, acquires standard scale umber of pulse,
Sampling time is 1 second, calculates standard scale flow value q=kf, and wherein k is flowmeter instrument coefficient, and f is standard scale output frequency,
Draw flow curve.10 flow values are continuously surveyed, one minute every time, respectively obtain q1、q2……q10, discharge stability is by 1 He of formula
Formula 2 calculates.
Flow average value:
Discharge stability:
(3) weighing control system designs
Weighing control system realizes the flow measurement of weight method, the weighing control system in Figure 10 device electrical schematic diagram by
Industrial personal computer, PLC, electronic scale, PCI-1612 communication card, PCI-1750, optoelectronic switch, PCI-1780, stepper motor, commutator,
Claim the composition such as water container, valve.Weighing system switch valve is controlled by PLC, and industrial personal computer controls stepper motor operation, stepper motor
Commutator is driven to realize that water switches in and out title water container, optoelectronic switch, which records water and flows into, claims water container time t, and electronic scale weighs
The weight G for claiming water in water container is flowed into, then is with the flow value that weight method measures
3 discharge stabilities test expert system automatically
Prolonged a large amount of discharge stability experiments are carried out on mostly set flow apparatus, discovery discharge stability is bad
Three kinds of tracing patterns: up and down, fluctuation, they mainly with equipment (switch valve, regulating valve, water pump system) phase on device
It closes, therefore proposition indicates flow value with flow curve figure, according to field device stability commissioning experience, flow is realized in software programming
The automatic diagnosis of stability, and prompt whether relevant device works normally.
Many of flow apparatus structure valve, installation site is different, and the flow for flowing through standard scale is also different, by experiment
It was found that: the leakage current amount of valve can cause the raising and lowering of pipeline flow, and the valve flow leakage circulated on main pipeline will lead to
Flow rises, and the leakage of bypath valve flow will cause flow reduction；Regulation valve core positions the bad fluctuation that can cause flow；Water
Up and down, the fluctuation of revolution speed can cause discharge stability to change, and the raising and lowering of pump rotary speed can be negative anti-by revolving speed
It presents control system and realizes automatic stable, the fluctuation of pump rotary speed is realized by pid regulator parameters, if fluctuation is more than that system permits
Perhaps range, expert diagnostic system are alarmed and are prompted: please search water pump and its connection equipment (water pump, shaft joint, encoder).
Figure 12 is the automatic diagnostic flow chart of flow apparatus discharge stability expert system, and discharge stability diagnosis was realized
Journey: closing all gas source switch of flow apparatus, when atmospheric pressure expression is to 0.5Mpa, closes all power switches, opens all
The valve of pipeline adjusts frequency converter frequency, runs half an hour in the middle large-capacity point of device.Selection needs the pipeline run, gives
Constant flow point and pressure value, system are automatically adjusted to given value, stable operation 10min；
Discharge stability in selection device test runs menu, runs program into discharge stability, acquires standard scale
Umber of pulse is converted into flow value, and the sampling time is 1 second；
Draw stability of flow linearity curve；
It selects stability to run menu, runs stability program, the sampling time 0.25 second, draw motor stabilizing
Linearity curve；
Discharge stability is calculated with formula 2, if stability in normal range (NR), shows that discharge stability is normal, exits diagnosis
System；
If discharge stability is exceeded, and pump motor rotation speed change is identical as flowed fluctuation, then is that water pump system is asked
It inscribes (water pump, shaft joint, encoder)；
If changes in flow rate is ascendant trend, needs to change the switch valve on Trunk Line and make marks；
If changes in flow rate is downward trend, opens bypass valve test and mark；
If standard scale flowed fluctuation is identical as weighing changes in flow rate, replaces regulating valve and mark；Otherwise refitting or again
It changes standard scale and marks.
As can be seen from the above description, the embodiment of the present invention discharge stability status display is intuitive；Quick diagnosis and solution are flowed
Measure discharge stability problem existing for apparatus system；The efficiency for improving meter calibration, reduces the production cost of instrument；It can be timely
And accurately know unstable defect existing for the water flow in flow apparatus, and can accurately know according to unstable defect and make
At the equipment of the unstable defect, and then realize the timely maintenance of the flow apparatus unstable to water flow；Even if being non-special
Industry technical staff can also reach quick diagnosis and solve existing for flow apparatus in a short time according to the prompt of expert system
Stability problem purpose saves the Artificial Diagnosis time, improves meter calibration efficiency, reduces the production cost of instrument.
The embodiment of the present invention nine provides water flow in a kind of flow apparatus for can be realized above-mentioned detection method and stablizes
The specific embodiment of property detection system.Referring to Figure 13, which specifically includes following content:
Water flow acquiring unit 10, for obtaining the water flow for flowing through running flow apparatus.
Stability of flow value determination unit 20, for determining the stability of flow of present flow rate device according to the value of the water flow
Value.
Stability curve determination unit 30, for through judgement learn the stability of flow value be more than setting value when, according to
The value of the water flow obtains stability of flow linearity curve, and obtains the motor speed of the pump motor run in present flow rate device
Stability curve.
Cause the equipment determination unit 40 that water flow is unstable, for according to the stability of flow linearity curve and motor speed
Stability curve determines the equipment for causing water flow unstable in present flow rate device.
As can be seen from the above description, the embodiment of the present invention can quickly judge the influence of flow apparatus discharge stability because
Element solves the problems, such as discharge stability existing for flow apparatus in time, improves the productivity and stated accuracy of instrument, i.e., in time and quasi-
Unstable defect existing for the true water flow known in flow apparatus, and can accurately be known according to unstable defect and cause this
The equipment of unstable defect, and then realize the timely maintenance of the flow apparatus unstable to water flow.
The above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these are modified or replace
It changes, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (8)
1. a kind of water flow Detection of Stability method in flow apparatus, which is characterized in that the described method includes:
Obtain the water flow for flowing through running flow apparatus；
The stability of flow value of present flow rate device is determined according to the value of the water flow；
If learning that the stability of flow value not in setting numberical range, obtains flow according to the value of the water flow through judgement
Stability curve, and obtain the motor stabilizing linearity curve of the pump motor run in present flow rate device；
And according to the stability of flow linearity curve and motor stabilizing linearity curve, determination causes water flow in present flow rate device
Measure unstable equipment；
The value according to the water flow determines the stability of flow value of present flow rate device, comprising:
According to the value of the water flow, the flow average value of present flow rate device is obtained；
And the stability of flow value of present flow rate device is determined according to the flow average value；
It is described according to the stability of flow linearity curve and motor stabilizing linearity curve, determination causes water flow in present flow rate device
Unstable equipment, comprising:
According to the stability of flow linearity curve and motor stabilizing linearity curve, the rotation speed change trend and water of the pump motor
The fluctuating change trend of flow；
If the rotation speed change trend of the pump motor is identical as the fluctuating change trend of water flow, it is determined that cause current water flow
Measuring unstable equipment is water pump, shaft joint or the encoder in present flow rate device.
2. the method according to claim 1, wherein described obtain the water flow for flowing through running flow apparatus
Amount, comprising:
In flow apparatus operation, the pulse reading of the standard scale in the flow apparatus is periodically acquired；
And the instrument coefficient according to the standard scale, each pulse reading that will acquire be converted into flow through it is running
The value of the water flow of flow apparatus.
3. the method according to claim 1, wherein if described learn that the stability of flow value is not being set through judgement
Determine in numberical range, then obtain stability of flow linearity curve according to that magnitude of the water flow, and obtains and run in present flow rate device
The motor stabilizing linearity curve of pump motor, comprising:
If the stability of flow value through judging to learn in present flow rate device is more than setting value, drawn according to the value of the water flow
Stability of flow linearity curve；
In currently running flow apparatus, the tachometer value of running pump motor is periodically acquired；
And the tachometer value according to the pump motor, draw the motor stabilizing linearity curve of the pump motor.
4. the method according to claim 1, wherein bent according to the stability of flow linearity curve and stability
Line determines the equipment for causing water flow unstable in present flow rate device, further includes:
Judge the type of the fluctuating change trend of presently described stability of flow linearity curve, wherein the class of the fluctuating change trend
Type includes: up and down and fluctuation；
If the type of fluctuating change trend is to rise, it is determined that the equipment for causing current water flow unstable is present flow rate device
In Trunk Line on switch valve；
If the type of fluctuating change trend is decline, it is determined that the equipment for causing current water flow unstable is present flow rate device
In by-passing valve；
If the type of fluctuating change trend be fluctuation, by according in present flow rate device standard scale and weighing system obtain respectively
The stability of flow linearity curve taken is compared, and the equipment for causing water flow unstable is determined according to comparison result.
5. according to the method described in claim 4, it is characterized in that, described will be according to the standard scale and stream in present flow rate device
The stability of flow linearity curve that amount weighing system obtains respectively is compared, before further include:
In flow apparatus operation, the weight readings of the water in the flow apparatus are periodically acquired；
And the time of the weighing system is flowed into according to water, each weight readings that will acquire, which are converted into, flows through operation
In flow apparatus water flow value.
6. according to the method described in claim 4, it is characterized in that, described will be according to the standard scale and stream in present flow rate device
The stability of flow linearity curve that amount weighing device obtains respectively is compared, and causes water flow unstable according to comparison result determination
Equipment, comprising:
Judgement learns that the fluctuating change trend of the stability of flow linearity curve obtained respectively according to the standard scale and weighing system is
It is no identical；
If so, determining that the equipment for causing current water flow unstable is the regulating valve in present flow rate device；
Otherwise, it is determined that Current standards table failure.
7. the method according to claim 1, wherein bent according to the stability of flow linearity curve and stability
Line determines the equipment for causing water flow unstable, later in present flow rate device further include:
The equipment for causing water flow unstable in determining present flow rate device is marked；
And the equipment for causing water flow unstable according to the label lookup, and the equipment is maintained or replaced
Operation.
8. water flow Detection of Stability system in a kind of flow apparatus, which is characterized in that the detection system includes:
Water flow acquiring unit, for obtaining the water flow for flowing through running flow apparatus；
Stability of flow value determination unit, for determining the stability of flow value of present flow rate device according to the value of the water flow；
Stability curve determination unit, for through judgement learn that the stability of flow value is greater than the set value when, according to the water
The value of flow obtains stability of flow linearity curve, and the stability for obtaining the pump motor run in present flow rate device is bent
Line；
Cause the equipment determination unit that water flow is unstable, for bent according to the stability of flow linearity curve and stability
Line determines the equipment for causing water flow unstable in present flow rate device；
The stability of flow value determination unit obtains the flow of present flow rate device specifically for the value according to the water flow
Average value；And the stability of flow value of present flow rate device is determined according to the flow average value；
The equipment determination unit for causing water flow unstable is specifically used for steady according to the stability of flow linearity curve and motor
Qualitative curve, the rotation speed change trend of the pump motor and the fluctuating change trend of water flow；If the pump motor
Rotation speed change trend it is identical as the fluctuating change trend of water flow, it is determined that the equipment for causing current water flow unstable be work as
Water pump, shaft joint or encoder in preceding flow apparatus.
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| JP6943683B2 (en) * | 2017-08-25 | 2021-10-06 | アズビル株式会社 | Controller and deterioration position detection method |
| CN108627220B (en) * | 2018-02-07 | 2019-10-15 | 中国计量大学 | A kind of stable-pressure device and its current stabilization method in water flow standard apparatus |
| CN110057427A (en) * | 2019-03-04 | 2019-07-26 | 天津大学 | A kind of calibrating flow point of apparatus for calibrating water meter is switched fast steady flow system |
| CN110068383A (en) * | 2019-03-04 | 2019-07-30 | 天津大学 | A kind of water meter calibration method being switched fast steady flow system based on calibrating flow point |
| CN111307253B (en) * | 2019-10-14 | 2021-09-21 | 北京远东仪表有限公司 | Intelligent detection and control system and method for flow device commutator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005114583A (en) * | 2003-10-08 | 2005-04-28 | Toshiba Corp | Conduit-refreshing plan support arrangement and system therefor |
| CN201347868Y (en) * | 2009-02-05 | 2009-11-18 | 重庆贻科科技有限公司 | Industry cycle water energy-saving control system |
| CN102359807A (en) * | 2011-08-08 | 2012-02-22 | 天津大学 | Control scheme for flow stability of liquid flow device |
| CN103088872A (en) * | 2013-02-01 | 2013-05-08 | 天津大学 | Water supplying system for flow device |
| CN203452119U (en) * | 2013-08-07 | 2014-02-26 | 天津大学 | Wide-flow-range water supply system for flow device |
-
2017
- 2017-01-17 CN CN201710035834.XA patent/CN106908121B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005114583A (en) * | 2003-10-08 | 2005-04-28 | Toshiba Corp | Conduit-refreshing plan support arrangement and system therefor |
| CN201347868Y (en) * | 2009-02-05 | 2009-11-18 | 重庆贻科科技有限公司 | Industry cycle water energy-saving control system |
| CN102359807A (en) * | 2011-08-08 | 2012-02-22 | 天津大学 | Control scheme for flow stability of liquid flow device |
| CN103088872A (en) * | 2013-02-01 | 2013-05-08 | 天津大学 | Water supplying system for flow device |
| CN203452119U (en) * | 2013-08-07 | 2014-02-26 | 天津大学 | Wide-flow-range water supply system for flow device |
Non-Patent Citations (1)
| Title |
|---|
| 水流量标准装置不确定度和流量稳定性研究;李峥;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20111215;全文 |
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