CN107990952A - The processing method and flow instrument of flow instrument instantaneous delivery - Google Patents

The processing method and flow instrument of flow instrument instantaneous delivery Download PDF

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Publication number
CN107990952A
CN107990952A CN201711219145.0A CN201711219145A CN107990952A CN 107990952 A CN107990952 A CN 107990952A CN 201711219145 A CN201711219145 A CN 201711219145A CN 107990952 A CN107990952 A CN 107990952A
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instantaneous delivery
flow
flow instrument
setting
processing
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CN107990952B (en
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柯涛
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CHONGQING SMART WATER METER GROUP Co Ltd
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CHONGQING SMART WATER METER GROUP Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus

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Abstract

The invention discloses a kind of processing method and flow instrument of flow instrument instantaneous delivery, flow instrument includes being used for the processor for gathering the flow sensor of instantaneous delivery and being electrically connected with flow sensor, and processor is programmed to perform corresponding judgment processing steps.The present invention can realize that when regime flow flows through flow instrument the instantaneous delivery of flow instrument output shows sufficiently stable, when fast-changing flow flows through flow instrument, the instantaneous delivery response quickly of flow instrument output.

Description

The processing method and flow instrument of flow instrument instantaneous delivery
Technical field
The invention belongs to flow instrument field, and in particular to a kind of processing method and flow instrument of flow instrument instantaneous delivery Table.
Background technology
Instantaneous delivery refers to the Fluid Volume that closed conduct or open channel effective cross-section are flowed through in the unit interval, is the one of flow instrument A important technology index.All there is fluctuation range regulation in general flow instrument standard to this amount, and some flow instruments are from stream The substandard requirement of instantaneous delivery of quantity sensor output, so as to just need to handle these instantaneous deliveries.
At present, the method for existing flow instrument processing instantaneous delivery is to seek the average value of multiple spot（Such as Siemens Company The flow instrument of production）, carry out smooth instantaneous delivery, to reach a metastable value.The method averaged by multiple spot A metastable value can be obtained, but if conceivable value is more stable, the points averaged are more, but work as and flow through When the flow of instrument changes in itself, instrument instantaneous delivery then shows change slowly, does not catch up with the change of real traffic, instrument The instantaneous delivery response speed of final output is too slow, or even the valve occurred on pipeline is closed for a long time, and the wink shown in instrument The awkward scene that Shi Liuliang is still not zero for a long time.Therefore, a point averaged generally is determined by the method for compromise Number modes neither too much or too little seek the average value of instantaneous delivery, and using the average value as the instantaneous delivery exported after handling, Or the points averaged can be set, allow client using instrument instrument transient response be will it is fast or will it is steady in optionally its One, you can't have both at the same time.
The content of the invention
The object of the present invention is to provide a kind of processing method and flow instrument of flow instrument instantaneous delivery, to realize steady When constant flow flows through flow instrument, the instantaneous delivery of flow instrument output shows sufficiently stable, in fast-changing traffic flow During through flow instrument, the instantaneous delivery response quickly of flow instrument output.
The processing method of flow instrument instantaneous delivery of the present invention, including：
The processor of flow instrument obtains original instantaneous delivery Qin, original instantaneous delivery number n, and make the following judgment processing：
If n=1, make the average instantaneous delivery AV after first processing1=Qi1, export the instantaneous delivery after first processing Qo1= AV1；
If n>1, then as original instantaneous delivery QinUndulate quantity △ An-1More than setting reference fluctuation amount △ B when（Work as △ An-1>During △ B）, or as original instantaneous delivery QinUndulate quantity △ An-1Less than or equal to the reference fluctuation amount △ B of setting, and Continuously become larger/diminish original instantaneous delivery points cn-1More than or equal to setting consecutive variations benchmark count CB when（Work as △ An-1≤ △ B and cn-1During >=CB）, make the average instantaneous delivery AV after n-th of processingn=Qin, export instantaneous after n-th of processing Flow Qon=AVn, as original instantaneous delivery QinUndulate quantity △ An-1Less than or equal to the reference fluctuation amount △ B of setting, and continuously Become larger/diminish original instantaneous delivery points cn-1Less than setting consecutive variations benchmark count CB when（I.e. as △ An-1≤ △ B and cn-1<During CB）If n is less than or equal to the benchmark points NB of setting（That is n≤NB）, then the average instantaneous stream after n-th of processing is made Measure AVn=(Qi1+ Qi2+…+Qin)/n, exports the instantaneous delivery Qo after n-th of processingn=AVnIf n is more than the datum mark of setting Number NB（That is n>NB）, then the average instantaneous delivery AV after n-th of processing is maden=(Qin-NB+…+Qin-1+Qin)/NB, exports n-th Instantaneous delivery Qo after processingn= AVn；
Wherein, the consecutive variations benchmark points CB of the setting meets：3≤CB<NB；The original instantaneous delivery QinFluctuation Measure △ An-1= (Qin-AVn-1)/AVn-1；The original instantaneous delivery points c that continuously becomes larger/diminishn-1Value mode be：
If n=2, work as Qi2>Qi1Or Qi2<Qi1When, c1=1, work as Qi2=Qi1When, c1=0；
If n>2, then work as Qin>Qin-1And Qin-1>Qin-2When, or work as Qin<Qin-1And Qin-1<Qin-2When, cn-1=cn-2+ 1, Work as Qin>Qin-1And Qin-1<Qin-2When, or work as Qin<Qin-1And Qin-1 >Qin-2When, or work as Qin=Qin-1When, cn-1=0, when Qin>Qin-1And Qin-1=Qin-2When, or work as Qin<Qin-1And Qin-1=Qin-2When, cn-1=1。
Flow instrument of the present invention, including for gather instantaneous delivery flow sensor and with flow sensor electricity The processor of connection, the processor are programmed to perform following steps：
Obtain original instantaneous delivery Qin, original instantaneous delivery number n；
If n=1, make the average instantaneous delivery AV after first processing1=Qi1, export the instantaneous delivery after first processing Qo1= AV1；
If n>1, then as original instantaneous delivery QinUndulate quantity △ An-1More than setting reference fluctuation amount △ B when, or work as Original instantaneous delivery QinUndulate quantity △ An-1Less than or equal to the reference fluctuation amount △ B of setting, and it is original continuously to become larger/diminish Instantaneous delivery points cn-1More than or equal to setting consecutive variations benchmark count CB when, make the average instantaneous stream after n-th of processing Measure AVn=Qin, export the instantaneous delivery Qo after n-th of processingn=AVn, as original instantaneous delivery QinUndulate quantity △ An-1Be less than or Equal to the reference fluctuation amount △ B of setting, and the original instantaneous delivery points c that continuously becomes larger/diminishn-1Less than the consecutive variations of setting During benchmark points CB, if n is less than or equal to the benchmark points NB of setting, make the average instantaneous delivery AV after n-th of processingn= (Qi1+ Qi2+…+Qin)/n, exports the instantaneous delivery Qo after n-th of processingn=AVnIf n is more than the benchmark points NB of setting, Make the average instantaneous delivery AV after n-th of processingn=(Qin-NB+…+Qin-1+Qin)/NB, exports the instantaneous stream after n-th of processing Measure Qon= AVn；
Wherein, the consecutive variations benchmark points CB of the setting meets：3≤CB<NB；The original instantaneous delivery QinFluctuation Measure △ An-1= (Qin-AVn-1)/AVn-1；The original instantaneous delivery points c that continuously becomes larger/diminishn-1Value mode be：
If n=2, work as Qi2>Qi1Or Qi2<Qi1When, c1=1, work as Qi2=Qi1When, c1=0；
If n>2, then work as Qin>Qin-1And Qin-1>Qin-2When, or work as Qin<Qin-1And Qin-1<Qin-2When, cn-1=cn-2+ 1, Work as Qin>Qin-1And Qin-1<Qin-2When, or work as Qin<Qin-1And Qin-1 >Qin-2When, or work as Qin=Qin-1When, cn-1=0, when Qin>Qin-1And Qin-1=Qin-2When, or work as Qin<Qin-1And Qin-1=Qin-2When, cn-1=1。
Reference fluctuation amount △ B of the setting, the value of the benchmark points NB of setting obtain as follows：
The first step, to the initial flow a produced instrument lead to a stable flow, and record should in a period of time The initial instantaneous delivery of initial flow instrument；
Second step, the variable quantity △ b for calculating these initial instantaneous deliveries in this period；
3rd step, ask different numbers continuous initial instantaneous delivery average value, obtain more cell means, then calculate every group The undulate quantity of average value, if the undulate quantity of certain cell mean can reach the instantaneous delivery stability criterion of such a flow instrument, Using the number y of the corresponding initial instantaneous delivery of this cell mean as with reference to the re that counts；
4th step, carry out the first step to the processing of the 3rd step to the branched initial flow instrument produced, and obtains multiple changes Measure △ b and multiple with reference to points re, the reference fluctuation amount using the maximum in multiple variable quantity △ b as such a flow instrument, Multiple maximums with reference in the re that counts are counted as the benchmark of such a flow instrument；
The reference fluctuation amount that 4th step obtains, be cured in the processor of initial flow instrument by the 5th step, forms the base of setting Quasi wave momentum △ B；The benchmark points that 4th step obtains are cured in the processor of initial flow instrument, form the benchmark of setting Points N B.
Wherein, the variable quantity △ b in the second step=（Qmax-Qmin)/Qavg；Wherein, QmaxRepresent what is recorded in the first step Initial instantaneous delivery Q1、Q2、Q3、…、QmIn maximum, QminRepresent the initial instantaneous delivery Q recorded in the first step1、Q2、 Q3、…、QmIn minimum value, Qavg=（Q1+Q2+Q3+…+Qm)/m（That is QavgRepresent the initial instantaneous delivery recorded in the first step Q1、Q2、Q3、…、QmAverage value）.
Undulate quantity △ d=(D of certain cell mean in 3rd stepmax- Dmin)/ Davg；Wherein, DmaxRepresent the group Average value D1、D2、…、DxIn maximum, DminRepresent cell mean D1、D2、…、DxIn minimum value, Davg=(D1+D2+… +Dx)/x（That is DavgRepresent cell mean D1、D2、…、DxAverage value）, D1=（Q1+Q2+Q3+…+Qy)/y, D2=（Q2 +Q3 +…+Qy+1)/y ..., Dx=（Qx+ Qx+1+…+Qx+y-1)/y, x+y≤m+1.
The original instantaneous delivery QinIt can be the instantaneous delivery that the flow sensor of flow instrument directly exports, also may be used Exported and through calibrated instantaneous delivery with the flow sensor for being flow instrument.
Realized using above-mentioned flow instrument and above-mentioned processing method when regime flow flows through flow instrument, flow instrument The instantaneous delivery of table output shows sufficiently stable, when fast-changing flow flows through flow instrument, flow instrument output Instantaneous delivery response quickly, so as to be conducive to improve the speed of automatic control process.
Brief description of the drawings
Fig. 1 is the process chart of the flow instrument instantaneous delivery of the present invention.
Fig. 2 is the structure diagram of the flow instrument of the present invention.
Fig. 3 is that the valve in small flow conduit quickly beats flow instrument and existing stream after opening/closing in the present embodiment Measure the comparison diagram of the instantaneous delivery of instrument output.
Fig. 4 is that the valve on big flow pipeline quickly beats flow instrument and existing stream after opening/closing in the present embodiment Measure the comparison diagram of the instantaneous delivery of instrument output.
Embodiment
Elaborate below in conjunction with the accompanying drawings to the present invention.
As shown in Figure 1 and Figure 2, flow instrument includes being used for the flow sensor and and flow sensor for gathering instantaneous delivery The processor of electrical connection.
The reference fluctuation amount △ B of setting and the benchmark of setting in processor as judgment threshold count NB by walking as follows It is rapid to obtain：
The first step, to the initial flow a produced instrument lead to a stable flow, and record should in a period of time The initial instantaneous delivery Q of initial flow instrument1、Q2、Q3、…、Qm。
Second step, by formula △ b=（Qmax-Qmin)/QavgCalculate the change of these initial instantaneous deliveries in this period Measure △ b；Wherein, QmaxRepresent initial instantaneous delivery Q1、Q2、Q3、…、QmIn maximum, QminRepresent initial instantaneous delivery Q1、 Q2、Q3、…、QmIn minimum value, Qavg=（Q1+Q2+Q3+…+Qm)/m（That is QavgRepresent initial instantaneous delivery Q1、Q2、Q3、…、Qm Average value）.
3rd step, ask different numbers continuous initial instantaneous delivery average value, obtain more cell means, then pass through Formula △ d=(Dmax- Dmin)/ DavgThe undulate quantity per cell mean is calculated, if the undulate quantity of certain cell mean can reach this The instantaneous delivery stability criterion of kind flow instrument, then by the number y of the corresponding initial instantaneous delivery of this cell mean as reference Count re；Wherein, DmaxRepresent cell mean D1、D2、…、DxIn maximum, DminRepresent cell mean D1、D2、…、Dx In minimum value, Davg=(D1+D2+…+Dx)/x（That is DavgRepresent cell mean D1、D2、…、DxAverage value）, D1=（Q1+Q2 +Q3+…+Qy)/y, D2=（Q2 +Q3+…+Qy+1)/y ..., Dx=（Qx+ Qx+1+…+Qx+y-1)/y, x+y≤m+1.For example record Initial instantaneous delivery has 149（That is Q1、Q2、Q3、…、Q149）, every time in initial instantaneous delivery Q1、Q2、Q3、…、Q149In take 80 A continuous initial instantaneous delivery is averaged, after carrying out 70 times, available the first cell mean being made of 70 average values； Every time in initial instantaneous delivery Q1、Q2、Q3、…、Q149In take 90 continuous initial instantaneous deliveries to average, carry out 60 times Afterwards, it can obtain the second cell mean being made of 60 average values；Every time in initial instantaneous delivery Q1、Q2、Q3、…、Q149In take 100 continuous initial instantaneous deliveries are averaged, and after carrying out 50 times, available the 3rd group be made of 50 average values is averaged Value；Every time in initial instantaneous delivery Q1、Q2、Q3、…、Q149In take 110 continuous initial instantaneous deliveries to average, carry out 40 After secondary, available the 4th cell mean being made of 40 average values；Every time in initial instantaneous delivery Q1、Q2、Q3、…、Q149In 120 continuous initial instantaneous deliveries are taken to average, after carrying out 30 times, available the 5th group be made of 30 average values is put down Average；Then five cell means can be obtained altogether, if the undulate quantity of the 4th cell mean can reach such a flow instrument Instantaneous delivery stability criterion, then using 110 as with reference to the re that counts.
4th step, carry out the first step to the processing of the 3rd step to the branched initial flow instrument produced, and obtains multiple Variable quantity △ b and multiple with reference to points re, the benchmark fluctuation using the maximum in multiple variable quantity △ b as such a flow instrument Amount, multiple maximums with reference in the re that counts are counted as the benchmark of such a flow instrument.
The reference fluctuation amount that 4th step obtains, be cured in the processor of initial flow instrument by the 5th step, forms setting Reference fluctuation amount △ B；The benchmark points that 4th step obtains are cured in the processor of initial flow instrument, form setting Benchmark points NB.
As shown in Figure 1, cure the processor for thering is reference fluctuation amount, benchmark points and consecutive variations benchmark to count to flow instrument The method that table instantaneous delivery is handled includes：
The first step, processor obtain original instantaneous delivery Qin, original instantaneous delivery number n, and judge whether n is more than 1, if It is（That is n>1）, then the 3rd step is performed, otherwise（That is n=1）Perform second step；
Second step, processor make the average instantaneous delivery AV after first processing1=Qi1, export the instantaneous stream after first processing Measure Qo1= AV1, it is then back to the execution first step；
3rd step, processor judge whether n is more than 2, if（That is n>2）, then the 5th step is performed, otherwise（That is n=2）Perform the Four steps；
4th step, processor judge Qi2Whether Qi is equal to1, if（That is Qi2=Qi1）, then the original wink that continuously becomes larger/diminish is made Shi Liuliang points c1=0, otherwise（That is Qi2>Qi1Or Qi2<Qi1）Make the original instantaneous delivery points c that continuously becomes larger/diminish1=1, then Perform the 6th step；
5th step, processor judge QinWith Qin-1、Qin-1With Qin-2Between relation, if Qin>Qin-1And Qin-1>Qin-2, Then make the original instantaneous delivery points c that continuously becomes larger/diminishn-1=cn-2+ 1, if Qin<Qin-1And Qin-1<Qin-2, then make continuously to become Greatly/diminish original instantaneous delivery points cn-1=cn-2+ 1, if Qin>Qin-1And Qin-1<Qin-2, then the original that continuously becomes larger/diminish is made Beginning instantaneous delivery points cn-1=0, if Qin<Qin-1And Qin-1 >Qin-2, then the original instantaneous delivery point that continuously becomes larger/diminish is made Number cn-1=0, if Qin=Qin-1, then the original instantaneous delivery points c that continuously becomes larger/diminish is maden-1=0, otherwise（That is Qin>Qin-1And Qin-1=Qin-2Or Qin<Qin-1And Qin-1=Qin-2）, make the original instantaneous delivery points c that continuously becomes larger/diminishn-1=1, then hold The 6th step of row；
6th step, processor judge original instantaneous delivery QinUndulate quantity △ An-1Whether the reference fluctuation amount △ B of setting is more than, If（That is △ An-1>△B）, then the 7th step is performed, otherwise（That is △ An-1≤△B）Perform the 8th step；
7th step, processor make the average instantaneous delivery AV after n-th of processingn=Qin, export the instantaneous delivery after n-th of processing Qon=AVn, it is then back to the execution first step；
8th step, processor judge the original instantaneous delivery points c that continuously becomes larger/diminishn-1Whether the continuous of setting is greater than or equal to Change benchmark points CB（The value of CB meets：3≤CB<NB）, if（That is cn-1≥CB）, then return and perform the 7th step, otherwise （That is cn-1<CB）Perform the 9th step；
9th step, processor judge whether n is more than the benchmark points NB of setting, if（That is n>NB）, then the 11st step is performed, Otherwise（That is n≤NB）Perform the tenth step；
Tenth step, processor make the average instantaneous delivery AV after n-th of processingn=(Qi1+ Qi2+…+Qin)/n, exports n-th Instantaneous delivery Qo after processingn=AVn, it is then back to the execution first step；
11st step, processor make the average instantaneous delivery AV after n-th of processingn=(Qin-NB+…+Qin-1+Qin)/NB, output Instantaneous delivery Qo after n-th of processingn= AVn, it is then back to the execution first step.
Above-mentioned original instantaneous delivery QinIt can be the instantaneous delivery that the flow sensor of flow instrument directly exports, also may be used Be flow instrument flow sensor output and through calibrated instantaneous delivery.
Flow instrument in the present embodiment and existing flow instrument are installed in small flow conduit, then quickly beaten Valve on the small flow line of opening/closing, comparison diagram as shown in Figure 3 can be obtained by carrying out test, from 3 it can be seen from the figure thats, soon The flow instrument 1s times after speed opening valve in the present embodiment have just reacted the true instantaneous delivery in small flow conduit, and straight Connect needs about 20s to can be only achieved the true instantaneous delivery in small flow conduit using the existing flow instrument of multi-point average, soon It is 0 that the flow instrument 1s times after speed closing valve in the present embodiment, which have just reacted instantaneous delivery, and valve is turned off, and is directly adopted With the existing flow instrument of multi-point average, instantaneous time flow is just 0 after valve is turned off about 20s.
Flow instrument in the present embodiment and existing flow instrument are installed on big flow pipeline, then quickly beaten Valve on opening/closing big flow pipeline, comparison diagram as shown in Figure 4 can be obtained by carrying out test, from 4 it can be seen from the figure thats, soon The flow instrument 3s times after speed opening valve in the present embodiment have just reached maximum stream flow, since water is larger（It is close 118m3/h）, pressure feedback system lags in water system, and the water confessed has reduced, and water supply and water outlet are just reached after 13s Equilibrium state（I.e. close to 110m3/h）, water is exported, and directly reacted completely using the existing flow instrument of multi-point average The valve opening details under this big flow is not gone out（I.e. by 118m3/ h drops to 110m3/h）；At twice during rapid-closure damper, this reality The corresponding instantaneous delivery of valve opening can quickly be reached by applying the flow instrument in example, and directly using the existing of multi-point average Flow instrument has the hysteresis of about 20s.
In the stability of instantaneous delivery, flow instrument and existing flow instrument in the present embodiment are all shown very Small undulate quantity.Therefore, the flow instrument in the present embodiment can not only show the undulate quantity of very little in stability of flow, flow Amount can also show good quick response when quickly changing, and be conducive to improve the speed of automatic control process.

Claims (10)

  1. A kind of 1. processing method of flow instrument instantaneous delivery, it is characterised in that including：
    The processor of flow instrument obtains original instantaneous delivery Qin, original instantaneous delivery number n, and make the following judgment processing：
    If n=1, make the average instantaneous delivery AV after first processing1=Qi1, export the instantaneous delivery after first processing Qo1= AV1；
    If n>1, then as original instantaneous delivery QinUndulate quantity △ An-1More than setting reference fluctuation amount △ B when, or when original Beginning instantaneous delivery QinUndulate quantity △ An-1Less than or equal to the reference fluctuation amount △ B of setting, and continuously become larger/diminish original wink Shi Liuliang points cn-1More than or equal to setting consecutive variations benchmark count CB when, make the average instantaneous delivery after n-th of processing AVn=Qin, export the instantaneous delivery Qo after n-th of processingn=AVn, as original instantaneous delivery QinUndulate quantity △ An-1It is less than or waits In the reference fluctuation amount △ B of setting, and the original instantaneous delivery points c that continuously becomes larger/diminishn-1Less than the consecutive variations base of setting When counting CB on schedule, if n is less than or equal to the benchmark points NB of setting, make the average instantaneous delivery AV after n-th of processingn=(Qi1 + Qi2+…+Qin)/n, exports the instantaneous delivery Qo after n-th of processingn=AVnIf n is more than the benchmark points NB of setting, make Average instantaneous delivery AV after n-th of processingn=(Qin-NB+…+Qin-1+Qin)/NB, exports the instantaneous delivery after n-th of processing Qon= AVn；
    Wherein, the consecutive variations benchmark points CB of the setting meets：3≤CB<NB；The original instantaneous delivery QinUndulate quantity △An-1= (Qin-AVn-1)/AVn-1；The original instantaneous delivery points c that continuously becomes larger/diminishn-1Value mode be：
    If n=2, work as Qi2>Qi1Or Qi2<Qi1When, c1=1, work as Qi2=Qi1When, c1=0；
    If n>2, then work as Qin>Qin-1And Qin-1>Qin-2When, or work as Qin<Qin-1And Qin-1<Qin-2When, cn-1=cn-2+ 1, when Qin>Qin-1And Qin-1<Qin-2When, or work as Qin<Qin-1And Qin-1 >Qin-2When, or work as Qin=Qin-1When, cn-1=0, when Qin>Qin-1And Qin-1=Qin-2When, or work as Qin<Qin-1And Qin-1=Qin-2When, cn-1=1。
  2. 2. the processing method of flow instrument instantaneous delivery according to claim 1, it is characterised in that：
    Reference fluctuation amount △ B of the setting, the value of the benchmark points NB of setting obtain as follows：
    The first step, to the initial flow a produced instrument lead to a stable flow, and record should in a period of time The initial instantaneous delivery of initial flow instrument；
    Second step, the variable quantity △ b for calculating these initial instantaneous deliveries in this period；
    3rd step, ask different numbers continuous initial instantaneous delivery average value, obtain more cell means, then calculate every group The undulate quantity of average value, if the undulate quantity of certain cell mean can reach the instantaneous delivery stability criterion of such a flow instrument, Using the number y of the corresponding initial instantaneous delivery of this cell mean as with reference to the re that counts；
    4th step, carry out the first step to the processing of the 3rd step to the branched initial flow instrument produced, and obtains multiple changes Measure △ b and multiple with reference to points re, the reference fluctuation amount using the maximum in multiple variable quantity △ b as such a flow instrument, Multiple maximums with reference in the re that counts are counted as the benchmark of such a flow instrument；
    The reference fluctuation amount that 4th step obtains, be cured in the processor of initial flow instrument by the 5th step, forms the base of setting Quasi wave momentum △ B；The benchmark points that 4th step obtains are cured in the processor of initial flow instrument, form the benchmark of setting Points N B.
  3. 3. the processing method of flow instrument instantaneous delivery according to claim 1 or 2, it is characterised in that：
    Variable quantity △ b in the second step=（Qmax-Qmin)/Qavg；Wherein, QmaxRepresent to record in the first step initial instantaneous Flow Q1、Q2、Q3、…、QmIn maximum, QminRepresent the initial instantaneous delivery Q recorded in the first step1、Q2、Q3、…、QmIn Minimum value, Qavg=（Q1+Q2+Q3+…+Qm)/m；
    Undulate quantity △ d=(D of certain cell mean in 3rd stepmax- Dmin)/ Davg；Wherein, DmaxRepresent that the group is averaged Value D1、D2、…、DxIn maximum, DminRepresent cell mean D1、D2、…、DxIn minimum value, Davg=(D1+D2+…+ Dx)/x, D1=（Q1+Q2+Q3+…+Qy)/y, D2=（Q2 +Q3+…+Qy+1)/y ..., Dx=（Qx+ Qx+1+…+Qx+y-1)/y, x+y≤ m+1。
  4. 4. the processing method of flow instrument instantaneous delivery according to any one of claims 1 to 3, it is characterised in that：The original Beginning instantaneous delivery QinThe instantaneous delivery directly exported for the flow sensor of flow instrument.
  5. 5. the processing method of flow instrument instantaneous delivery according to any one of claims 1 to 3, it is characterised in that：The original Beginning instantaneous delivery QinExported and through calibrated instantaneous delivery for the flow sensor of flow instrument.
  6. 6. a kind of flow instrument, including the processing for gathering the flow sensor of instantaneous delivery and being electrically connected with flow sensor Device, it is characterised in that the processor is programmed to perform following steps：
    Obtain original instantaneous delivery Qin, original instantaneous delivery number n；
    If n=1, make the average instantaneous delivery AV after first processing1=Qi1, export the instantaneous delivery after first processing Qo1= AV1；
    If n>1, then as original instantaneous delivery QinUndulate quantity △ An-1More than setting reference fluctuation amount △ B when, or when original Beginning instantaneous delivery QinUndulate quantity △ An-1Less than or equal to the reference fluctuation amount △ B of setting, and continuously become larger/diminish original wink Shi Liuliang points cn-1More than or equal to setting consecutive variations benchmark count CB when, make the average instantaneous delivery after n-th of processing AVn=Qin, export the instantaneous delivery Qo after n-th of processingn=AVn, as original instantaneous delivery QinUndulate quantity △ An-1It is less than or waits In the reference fluctuation amount △ B of setting, and the original instantaneous delivery points c that continuously becomes larger/diminishn-1Less than the consecutive variations base of setting When counting CB on schedule, if n is less than or equal to the benchmark points NB of setting, make the average instantaneous delivery AV after n-th of processingn=(Qi1 + Qi2+…+Qin)/n, exports the instantaneous delivery Qo after n-th of processingn=AVnIf n is more than the benchmark points NB of setting, make Average instantaneous delivery AV after n-th of processingn=(Qin-NB+…+Qin-1+Qin)/NB, exports the instantaneous delivery after n-th of processing Qon= AVn；
    Wherein, the consecutive variations benchmark points CB of the setting meets：3≤CB<NB；The original instantaneous delivery QinUndulate quantity △An-1= (Qin-AVn-1)/AVn-1；The original instantaneous delivery points c that continuously becomes larger/diminishn-1Value mode be：
    If n=2, work as Qi2>Qi1Or Qi2<Qi1When, c1=1, work as Qi2=Qi1When, c1=0；
    If n>2, then work as Qin>Qin-1And Qin-1>Qin-2When, or work as Qin<Qin-1And Qin-1<Qin-2When, cn-1=cn-2+ 1, when Qin>Qin-1And Qin-1<Qin-2When, or work as Qin<Qin-1And Qin-1 >Qin-2When, or work as Qin=Qin-1When, cn-1=0, when Qin>Qin-1And Qin-1=Qin-2When, or work as Qin<Qin-1And Qin-1=Qin-2When, cn-1=1。
  7. 7. flow instrument according to claim 6, it is characterised in that：
    Reference fluctuation amount △ B of the setting, the value of the benchmark points NB of setting obtain as follows：
    The first step, to the initial flow a produced instrument lead to a stable flow, and record should in a period of time The initial instantaneous delivery of initial flow instrument；
    Second step, the variable quantity △ b for calculating these initial instantaneous deliveries in this period；
    3rd step, ask different numbers continuous initial instantaneous delivery average value, obtain more cell means, then calculate every group The undulate quantity of average value, if the undulate quantity of certain cell mean can reach the instantaneous delivery stability criterion of such a flow instrument, Using the number y of the corresponding initial instantaneous delivery of this cell mean as with reference to the re that counts；
    4th step, carry out the first step to the processing of the 3rd step to the branched initial flow instrument produced, and obtains multiple changes Measure △ b and multiple with reference to points re, the reference fluctuation amount using the maximum in multiple variable quantity △ b as such a flow instrument, Multiple maximums with reference in the re that counts are counted as the benchmark of such a flow instrument；
    The reference fluctuation amount that 4th step obtains, be cured in the processor of initial flow instrument by the 5th step, forms the base of setting Quasi wave momentum △ B；The benchmark points that 4th step obtains are cured in the processor of initial flow instrument, form the benchmark of setting Points N B.
  8. 8. flow instrument according to claim 7, it is characterised in that：
    Variable quantity △ b in the second step=（Qmax-Qmin)/Qavg；Wherein, QmaxRepresent to record in the first step initial instantaneous Flow Q1、Q2、Q3、…、QmIn maximum, QminRepresent the initial instantaneous delivery Q recorded in the first step1、Q2、Q3、…、QmIn Minimum value, Qavg=（Q1+Q2+Q3+…+Qm)/m；
    Undulate quantity △ d=(D of certain cell mean in 3rd stepmax- Dmin)/ Davg；Wherein, DmaxRepresent that the group is averaged Value D1、D2、…、DxIn maximum, DminRepresent cell mean D1、D2、…、DxIn minimum value, Davg=(D1+D2+…+ Dx)/x, D1=（Q1+Q2+Q3+…+Qy)/y, D2=（Q2 +Q3+…+Qy+1)/y ..., Dx=（Qx+ Qx+1+…+Qx+y-1)/y, x+y≤ m+1。
  9. 9. according to any flow instrument of claim 6 to 8, it is characterised in that：The original instantaneous delivery QinFor flow The instantaneous delivery that sensor directly exports.
  10. 10. according to any flow instrument of claim 6 to 8, it is characterised in that：The original instantaneous delivery QinFor flow Sensor exports and through calibrated instantaneous delivery.
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