CN104267747B - A kind of flow detector and numerical modeling method thereof - Google Patents
A kind of flow detector and numerical modeling method thereof Download PDFInfo
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- CN104267747B CN104267747B CN201410477618.7A CN201410477618A CN104267747B CN 104267747 B CN104267747 B CN 104267747B CN 201410477618 A CN201410477618 A CN 201410477618A CN 104267747 B CN104267747 B CN 104267747B
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Abstract
The present invention relates to a kind of flow detector and flow detection numerical modeling method, for controlling the gas flow in pipeline.Flow detector comprises measurement pipeline, valve control module, flow detection module and processing module, processing module can be by the data that flow detection module is measured to build up the numerical model of discharge characteristic matched curve, and controlled the signal opening degree with control valve structure by processing module back coupling one, with the flow being precisely controlled further in pipeline.
Description
Technical field
The present invention relates to the gas flow be applicable to airflow line control, with construction numerical model and the control signal opening degree with control valve device is feedback, with the flow detector of flow being accurately controlled in airflow line and numerical modeling method thereof by metric data.
Background technology
Fluid in tubing can be because of pipe assembly (valve, bend pipe, manifold, reducer pipe, filter ... etc.) impact have crushing situation produce, allow the flow velocity in pipeline and the distribution of flow unstable, but there is no the instrument and equipment that can directly measure flow at present, after being only capable of utilizing flow monitor to measure, inference is learnt again, but use the difference of environment make the analog result of laboratory or derivation formula and cannot directly overlap for scene, the flow-control in tubing is allowed to be constantly in out the control in loop environmentally, cannot effectively promote it and control precision.
Furthermore, pipeline fluid, when via valve mechanism, can make valve rear end fluid produce turbulent phenomenon in various degree because of the opening angle difference of valve mechanism, reduce signal degree of accuracy to increase error in measurement.
Described in before taking a broad view of, being event, the inventor of the present invention concentrates on studies, thinks and designs a kind of flow detector and numerical modeling method thereof through pains for many years, is improved with the disappearance for prior art, and then the enforcement in enhancement industry utilizes.
Summary of the invention
The technical problem to be solved is to provide the flowing gas state of a kind of measurement reality, is back in processing module build up a numerical model by measurement signal, again according to the traffic demand of settings to send corresponding controls signal to adjust the opening degree of valve mechanism, and the numerical model of construction is utilized to carry out feedbacking according to actual monitoring signal and control flow detector and the numerical modeling method thereof of the traffic demand to provide stable flow and satisfied setting.
The technical scheme is that a kind of flow detector, including measuring pipeline, valve control module, flow detection module and processing module；
Described measurement pipeline is arranged at airflow line side；
Described valve control module is arranged in described measurement pipeline, and described valve control module comprises a valve mechanism and a valve actuation unit, and described valve control module is for by controlling described valve actuation unit to adjust the opening degree of valve mechanism；
Described flow detection module, comprises multiple detector unit, and multiple detector units are respectively arranged at the both sides of described measurement pipeline, and send the multiple detection signals collected to processing module；
Described processing module, receive multiple described detection signal and build discharge characteristic matched curve according to multiple detection signals, and judge according to this discharge characteristic matched curve, generate and control signal, and control signal is sent to described valve control module, to control the opening degree of described valve mechanism, and then adjust the gas circulation of described measurement pipeline.
The invention has the beneficial effects as follows: 1, numerical modeling: the measurement signal that the present invention utilizes actual amount to measure meets the corresponding numerical model of each environment to build up, and the model parameter of revised theory derivation further is to promote precision；
The most immediately feedback: the discharge characteristic matched curve that available numerical model builds up, control signal to valve control module with the opening degree of control valve door to send, and then the gas circulation in adjustment amount test tube road.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described measurement pipeline also comprises an adapter, the caliber differing from described airflow line for measuring the caliber of pipeline of described adapter.
Further, described valve mechanism also comprises a face coat, and described face coat is for increasing the corrosion resistance of described valve mechanism.
Further, the rectification module for reducing turbulent flow phenomenon is also included.
Further, described discharge characteristic matched curve specially utilizes data fitting algorithms that detection signal is carried out computing matching.
Further, described data fitting algorithms comprises least square method, conjugate gradient method or regression analysis.
Further, the plurality of detection signal comprises wind speed, blast, pathogenic wind-warm or a combination thereof.
Further, the present invention also provides for a kind of flow detection numerical modeling method based on above-mentioned purpose, and it comprises the steps of
Step 1: multiple detector units are respectively arranged at the both sides of a measurement pipeline；
Step 2: utilize valve actuation unit sequentially to adjust the opening degree of valve mechanism；
Step 3: utilize the plurality of detector unit to measure the flow measured in pipeline respectively, obtain multiple detection signal；
Step 4: multiple detection signals are back to processing module, and apply data fitting algorithms with construction discharge characteristic matched curve；
Step 5: carry out judging and send control signal according to described discharge characteristic matched curve and control the opening degree of described valve mechanism, and then adjust the gas circulation of described measurement pipeline.
Further, data fitting algorithms includes least square method, conjugate gradient method or regression analysis.
Further, the plurality of detection signal comprises wind speed, blast, pathogenic wind-warm or a combination thereof.
Accompanying drawing explanation
Fig. 1 is inventive flow structure of the detecting device figure；
Fig. 2 is that inventive flow detects device embodiment 1 structure chart；
Fig. 3 is the flow chart of steps of inventive flow detection numerical modeling method.
In accompanying drawing, the list of parts representated by each label is as follows:
S flow detector, 5 airflow lines, 10 measure pipeline, 11 adapteres, 20 valve control modules, 21 valve mechanisms, 211 face coats, 22 valve actuation unit, 30 flow detection modules, 31 detector units, 315 detection signals, 40 processing modules, 42 data fitting algorithms, 44 discharge characteristic matched curves, 405 control signal, 50 rectification modules, S1～S5 steps flow chart.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, example is served only for explaining the present invention, is not intended to limit the scope of the present invention.
As it is shown in figure 1, be inventive flow structure of the detecting device figure；Fig. 2 is that inventive flow detects device embodiment 1 structure chart；Fig. 3 is the flow chart of steps of inventive flow detection numerical modeling method.
Embodiment 1
Can be known by Fig. 1 and Fig. 2, flow detector S system is used in the gas flow controlling to be carried in airflow line 5, by this flow detector S with the flow in adjustment airflow line 5 further, is beneficial to follow-up utilization.Flow detector S comprises measurement pipeline 10, valve control module 20, flow detection module 30 and processing module 40.Measuring pipeline 10 is the side being assemblied in airflow line 5, when airflow line 5 and the caliber measuring pipeline 10 are different, can set up an adapter 11 so that assembling.
Valve control module 20 is to be configured in measurement pipeline 10, and valve control module 20 comprises valve mechanism 21 and valve actuation unit 22, and valve control module 20 can be by controlling valve brake unit 22 to adjust the opening degree of valve mechanism 21.In enforcement, valve mechanism 21 can be common butterfly valve or other valve class, suitable valve mechanism 21 is selected under the demand of caliber and intensity, more can be according to the difference using environment, outer surface in valve mechanism 21 is coated with last layer face coat 211, this face coat 211 is the corrosion resistance increasing valve mechanism 21, to avoid the corrosive gas direct destructive valve door 21 in airflow line 5, and causes structural deterioration or failure of apparatus.
Flow detection module 30 can comprise multiple detector unit 31, and multiple detector units 31 are the both sides being respectively arranged at and measuring pipeline 10 and transmit corresponding multiple detection signals 315.Detector unit 31 can be plug-in type flow detector, ultrasound flow detector, differential flow detector etc., and the detection signal 315 measured then comprises wind speed, blast, pathogenic wind-warm or a combination thereof.In enforcement, when detect signal 315 measure the variations in temperature in air-flow exceed setting threshold value time, valve control module 20 then sends emergency response signal to close valve mechanism 21, and sends alerting and carry out processing and accident eliminating with prompting operator.
When the part detector unit 31 in multiple detector units 31 is arranged in the front end of valve control module 20, system is to measure the flow field signal in pipeline 10, and related signal now is because of not yet the most stable by turbulent flow phenomena impair.And the part detector unit 31 of remaining is when being arranged at the rear end of valve control module 20, then can be disturbed by the turbulent flow factor such as phenomenon and boundary current effect, make the signal instability measured, propose following several solutions for solving this problem present invention.
The first, the multiple detector units 31 being configured at the rear end of valve control module 20 can utilize the configuration of compartment, circulating type or a combination thereof arrange, by diverse location detection signal 315 be modified analyze, and then reduce detection signal 315 error in measurement value.
The second, the turbulent flow phenomenon that a rectification module 50 causes because valve mechanism 21 deflection stops with the fluid reduced in measurement pipeline 10 in pipe can be set up in the rear end of valve control module 20, and then promote the accuracy detecting signal 315.
3rd, the opening degree of valve mechanism 21 is slowly adjusted by valve actuation unit 22, to avoid causing detection signal 315 unstable because circulation area changes rapidly.
Processing module 40 is to be received being configured at the multiple detection signals 315 measuring pipeline 10 both sides, and by data fitting algorithms 42 such as least square method, conjugate gradient method or regression analyses to build up the numerical model of discharge characteristic matched curve 44, when user sets a predetermined amount of flow, flow detector S then utilizes discharge characteristic matched curve 44 to send out corresponding control signal 405 to valve control module 20, with the opening degree of control valve door 21, and then the gas circulation in adjustment amount test tube road 10.And available detection signal 315 feedback and revised the opening degree of valve mechanism 21, to provide stable flow and to meet the traffic demand of setting, to reach the purpose of back coupling control.
Further illustrate, user can be prior to several flow field models that are common or that derived of construction in processing module 40, select the numerical model of suitably coupling again according to practice situation, utilize the multiple detection signals 315 received to revise the discharge characteristic matched curve 44 of numerical model.
If built-in numerical model cannot actual match with operation environment, the most first control valve actuating unit 22 and sequentially adjust the opening degree of valve mechanism 21 according to measurement resolution, recycling flow detection module 30 is to capture the valve mechanism 21 corresponding a plurality of detection signals 315 under different opening degrees, and is back in processing module 40 utilize data fitting algorithms 42 to build up corresponding discharge characteristic matched curve 44.
After the numerical model construction of discharge characteristic matched curve 44 or correction complete, user then can input required traffic demand in processing module 40, traffic demand is then brought in discharge characteristic matched curve 44 model and is carried out computing by processing module 40, the required opening degree of valve mechanism 21 is tried to achieve with computing, and send corresponding control signal 405 to valve control module 20 with the opening degree of control valve structure 21, and the multiple detection signals 315 measured after recycling adjustment are to feedback the opening degree revising valve mechanism 21.
Referring to the 3rd figure, it is the flow chart of steps of the flow detection numerical modeling method for the present invention.In step S1, multiple detector units 31 being configured at the both sides measuring pipeline 10, plurality of detector unit 31 is can be properly configured in the relative position measuring pipeline 10 according to actual environment and demand.In step S2, valve actuation unit 22 is utilized sequentially to adjust the opening degree of valve mechanism 21.In step S3, multiple detector unit 31 is utilized to measure corresponding multiple detection signals 315, wherein can be by the start speed of control valve actuating unit 22, with the further metric data amount increasing detection signal 315.
In step S4, multiple detection signals 315 are back to processing module 40, and apply data fitting algorithms 42 with construction discharge characteristic matched curve 44, wherein discharge characteristic matched curve 44 can be by data fitting algorithms 42 such as least square method, conjugate gradient method or regression analyses to build up corresponding numerical model.Then, in step S5, according to discharge characteristic matched curve 44 to send the opening degree controlling signal 405 control valve door 21, and then the gas circulation in adjustment amount test tube road 10, wherein available detection signal 315 is feedback and is revised the opening degree of valve mechanism 21, to provide stable flow and the traffic demand of satisfied setting.
The embodiment of the above is only the technological thought for the explanation present invention and feature, its purpose will appreciate that the content of the present invention and implements according to this making the person skilled in the art, when can not with the scope of the claims of the restriction present invention, the most generally the equalization change made according to disclosed spirit or modification, must contain in the scope of the claims of the present invention.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. a flow detector, it is characterised in that: include measuring pipeline, valve control module, flow detection module and processing module；
Described measurement pipeline is arranged at airflow line side；
Described valve control module is arranged in described measurement pipeline, and described valve control module comprises a valve mechanism and a valve actuation unit, and described valve control module is for by controlling described valve actuation unit to adjust the opening degree of valve mechanism；
Described flow detection module, comprises multiple detector unit, and multiple detector units are respectively arranged at the both sides of described measurement pipeline, and send the multiple detection signals collected to processing module；
Described processing module, receive multiple described detection signal and build discharge characteristic matched curve according to multiple detection signals, and judge according to this discharge characteristic matched curve, generate and control signal, and control signal is sent to described valve control module, to control the opening degree of described valve mechanism, and then adjust the gas circulation of described measurement pipeline.
Flow detector the most according to claim 1, it is characterised in that: described measurement pipeline also comprises an adapter, the caliber differing from described airflow line for measuring the caliber of pipeline of described adapter.
Flow detector the most according to claim 1, it is characterised in that: described valve mechanism also comprises a face coat, and described face coat is for increasing the corrosion resistance of described valve mechanism.
Flow detector the most according to claim 1, it is characterised in that: also include the rectification module for reducing turbulent flow phenomenon.
Flow detector the most according to claim 1, it is characterised in that: described discharge characteristic matched curve specially utilizes data fitting algorithms that detection signal is carried out computing matching.
Flow detector the most according to claim 5, it is characterised in that: described data fitting algorithms comprises least square method, conjugate gradient method or regression analysis.
Flow detector the most according to claim 1, it is characterised in that: the plurality of detection signal comprises wind speed, blast, pathogenic wind-warm or a combination thereof.
8. a flow detection numerical modeling method, it is characterised in that it comprises the steps of
Step 1: multiple detector units are respectively arranged at the both sides of a measurement pipeline；
Step 2: utilize valve actuation unit sequentially to adjust the opening degree of valve mechanism；
Step 3: utilize the plurality of detector unit to measure the flow measured in pipeline respectively, obtain multiple detection signal；
Step 4: multiple detection signals are back to processing module, and apply data fitting algorithms with construction discharge characteristic matched curve；
Step 5: carry out judging and send control signal according to described discharge characteristic matched curve and control the opening degree of described valve mechanism, and then adjust the gas circulation of described measurement pipeline.
Flow detection numerical modeling method the most according to claim 8, it is characterised in that: data fitting algorithms includes least square method, conjugate gradient method or regression analysis.
Flow detection numerical modeling method the most according to claim 8, it is characterised in that: the plurality of detection signal comprises wind speed, blast, pathogenic wind-warm or a combination thereof.
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| CN105136273B (en) * | 2015-05-20 | 2018-06-08 | 武汉理工大学 | Pipeline vibration based on feedback and Fibre Optical Sensor monitors automatically and control device |
| CN116755477B (en) * | 2023-08-16 | 2023-11-03 | 西安倍得新数据科技有限公司 | Automatic flow control and regulation method and system for fluid channel |
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| WO2011135826A1 (en) * | 2010-04-27 | 2011-11-03 | Hitachi Metals, Ltd. | Method and system of on-tool and on-site mfc optimization providing consistent response |
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| JP5195527B2 (en) * | 2009-03-03 | 2013-05-08 | 株式会社明電舎 | Flow control device and process device |
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| CN101799691A (en) * | 2009-02-11 | 2010-08-11 | 深圳市常工电子计算机有限公司 | Water flow measurement sensory control assembly |
| JP5195527B2 (en) * | 2009-03-03 | 2013-05-08 | 株式会社明電舎 | Flow control device and process device |
| WO2011135826A1 (en) * | 2010-04-27 | 2011-11-03 | Hitachi Metals, Ltd. | Method and system of on-tool and on-site mfc optimization providing consistent response |
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