CN109752057A - A kind of pump capacity indirect measurement method, apparatus and system - Google Patents
A kind of pump capacity indirect measurement method, apparatus and system Download PDFInfo
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- CN109752057A CN109752057A CN201910104163.7A CN201910104163A CN109752057A CN 109752057 A CN109752057 A CN 109752057A CN 201910104163 A CN201910104163 A CN 201910104163A CN 109752057 A CN109752057 A CN 109752057A
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Abstract
The invention discloses a kind of pump capacity indirect measurement method, apparatus and system, actual water level value is obtained, and the actual water level value and standard water place value are obtained into water-head Δ h as difference；Obtain the actual power value P and power-handling capability P of water pump0；Flow fitting function is called, and by the water-head Δ h, the actual power value P of water pump, power-handling capability P0It brings the actual flow that the flow fitting function calculates water outlet pump into, completes the indirect measurement of pump capacity.The present invention realizes more fully and effectively real-time dynamic monitoring, and can remotely adjust the parameter of flow fitting function, guarantees the accuracy of measurement process, calculates efficiently, precision is reliable, helps to monitor water pump information more accurately.
Description
Technical field
The invention belongs to data acquisition and monitoring technical fields, and in particular to a kind of pump capacity indirect measurement method, dress
It sets and system, more is related to a kind of irrigation pump flow indirect measurement method compensated based on actual power and water-head, dress
It sets and system.
Background technique
Pumping plant is component part important in hydraulic engineering, plays important angle in the daily production and life of people
Color carries the important tasks such as water transfer, water supply, irrigation, waterlogging prevention.In the area that Chinese large-sized pumping plant is more concentrated, tentatively
It forms based on large pumping station, the Engineering System of water transfer, water supply, irrigation, water drainage supplemented by small pumping station.Most area is also
The primary stage changed in traditional manual mode to automation mode.
With the fast development of computer technology, measuring technique, the communication technology, China comes into effect pumping plant information chemical industry
Journey achieves certain achievement by the development of longer term；But with the increase year by year of pumping plant quantity, to substantial amounts
There is also many defects for the supervision of pumping plant.In the prior art, acquisition mode is mostly set using dedicated flowmeter or metering
The standby acquisition for carrying out information, usual equipment volume is huge and higher cost, also rests on operating states of the units to the supervision of pumping plant
Monitoring, fully and effectively real-time dynamic monitoring cannot be carried out to pumping plant information.
Currently used flow measurement method has: traditional current-metre measurement method, electromagnetic flowmeter hydrometry, ultrasonic flow measurement
Method, orifice flowmeter hydrometry, turbine flowmeter hydrometry etc..
Traditional current-metre measurement method: the part mean flow perpendicular to the cross-section of river by measuring several areas
Speed acquires partial discharge multiplied by part discharge area, then calculates its algebraical sum and obtain section flow, and flow measurement precision is not high.
Ultrasonic Flowmeter method: it is more demanding to detected fluid, it is only available for clean liquids and gases flow, essence
Spend it is not high, stability is poor, and vulnerable to the influence of pipeline, pipeline produces bigger effect the precision of flowmeter, when to instrument into
The external calibration of row needs actual homogeneity fluid, and use occasion is limited, and is carried out using traditional current-metre measurement method than surveying
The precision of calibration, measurement is not high.
Electromagnetic flowmeter hydrometry: it is higher to environmental requirement, pipeline rust, attachment can flow measurement precision to instrument generate
Larger impact is carrying out actual rate timing, is replacing mean velocity in section using local location flow velocity, the precision of measurement is not high.
Orifice flowmeter hydrometry: when carrying out coefficient calibration, influence factor is numerous and intricate, and precision is difficult to mention
Height, discharge coefficient is related with Reynolds number, and measurement range degree is narrow；When orifice plate is worn, calibration coefficient will fail, and it is difficult that precision is used for a long time
To guarantee.
Turbine flowmeter hydrometry: experiencing fluid mean flow rate by mutliblade rotor, to derive outflow or total
Amount, but calibration characteristics, cannot be kept for a long time, sensor is needed replacing when being calibrated again, and cannot be by simply modifying
Calibration parameter, realization are calibrated again.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes a kind of pump capacity indirect measurement method, apparatus and system, realize more complete
Face, effectively real-time dynamic monitoring, and the parameter of flow fitting function can be remotely adjusted, guarantee the accuracy of measurement process, calculates
Efficiently, precision is reliable, helps to monitor water pump information more accurately.
It realizes above-mentioned technical purpose, reaches above-mentioned technical effect, the invention is realized by the following technical scheme:
In a first aspect, the present invention provides a kind of pump capacity indirect measurement methods, comprising:
(1) actual water level value is obtained, and the actual water level value and standard water place value are obtained into water-head Δ h as difference；
(2) the actual power value P and power-handling capability P of water pump are obtained0；
(3) flow fitting function is called, and by the water-head Δ h, the actual power value P of water pump, power-handling capability P0
It brings the actual flow that the flow fitting function calculates water outlet pump into, completes the indirect measurement of pump capacity.
Preferably, the flow fitting function specifically:
Wherein, Q indicates that the actual flow for the water pump being calculated, f indicate the functional relation of fitting, Q0Indicate ideal situation
The flow of lower water pump, k1、k2、k3、k4Indicate that fitting coefficient, a and b indicate range ability coefficient.
Preferably, the pump capacity indirect measurement method further include:
The actual flow for calculating water outlet pump is sent to remote monitoring terminal.
When judging to need the more fitting coefficient of new flow fitting function and range ability coefficient, then long-range prison is received
It surveys terminal and carries out corresponding update operation.
Preferably, the fitting coefficient k1、k2、k3、k4It is in the data for obtaining several groups different difference power and water-head
Afterwards, carry out what Multiple Non Linear Regression was fitted；The difference power by water pump actual power value P and power-handling capability P0Make
Difference obtains.
Preferably, range ability the coefficient a and b are based on corresponding range model in Multiple Non Linear Regression fit procedure
It encloses.
Preferably, the a=0.8, b=1.2.
Preferably, the pump capacity indirect measurement method further include:
After judging that power down occurs in remote monitoring terminal, then stop measuring；
When judging that remote monitoring terminal is in power supply state, then constantly circulation carries out step (1)-(3).
Second aspect, the present invention provides a kind of pump capacity indirect measurement systems, comprising:
First computing module makees poor obtain for obtaining actual water level value, and by the actual water level value and standard water place value
To water-head Δ h；
Module is obtained, for obtaining the actual power value P and power-handling capability P of water pump0；
Second computing module, for calling flow fitting function, and by the actual power value of the water-head Δ h, water pump
P, power-handling capability P0It brings the actual flow that the flow fitting function calculates water outlet pump into, completes the indirect survey of pump capacity
Amount.
Preferably, the flow fitting function specifically:
Wherein, Q indicates that the actual flow for the water pump being calculated, f indicate the functional relation of fitting, Q0Indicate ideal situation
The flow of lower water pump, k1、k2、k3、k4Indicate that fitting coefficient, a and b indicate range ability coefficient.
The third aspect, the present invention provides a kind of pump capacity indirect measurement systems, comprising:
Processor is adapted for carrying out each instruction；And
Equipment is stored, is suitable for storing a plurality of instruction, described instruction is suitable for being loaded by processor and being executed in first aspect and appoint
Step described in one.
Compared with prior art, beneficial effects of the present invention:
The present invention proposes a kind of pump capacity indirect measurement method, apparatus and system, will may in actual use process
The pumping level error and water pump actual power error that will appear are taken into account, and obtain the specific value of deviation by measurement, and
The flow fitting function being fitted is substituted into, so that operation result is more nearly actual pump capacity value, realization is more comprehensive, has
Effect ground real-time dynamic monitoring
The present invention is also configured to remotely adjust the parameter of flow fitting function, guarantees the accuracy of measurement process, meter
It calculates efficiently, precision is reliable, helps to monitor water pump information more accurately.
Detailed description of the invention
Fig. 1 is the flow diagram of the pump capacity indirect measurement method of an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
Embodiment 1
As shown in Figure 1, the embodiment of the invention provides a kind of pump capacity indirect measurement methods, comprising the following steps:
(1) according to practical situations, judge whether the fitting coefficient for needing to carry out flow fitting function and range model
Enclose coefficient update；Specifically:
When judging to need the more fitting coefficient of new flow fitting function and range ability coefficient, then long-range prison is received
It surveys terminal and carries out corresponding update operation, is i.e. then long-range adjusting parameter in Fig. 1 carries out subsequent step again；
When judging not needing the more fitting coefficient of new flow fitting function and range ability coefficient, then directly carry out
Subsequent step；
(2) actual water level value is obtained, and the actual water level value and standard water place value are obtained into water-head Δ h as difference；?
In the preferred embodiment of the embodiment of the present invention, the actual water level value is collected by water level sensor；
(3) the actual power value P and power-handling capability P of water pump are obtained0；Wherein, the actual power value P of the water pump is straight
Connect what measurement obtained；
(4) flow fitting function is called, and by the water-head Δ h, the actual power value P of water pump, power-handling capability P0
It brings the actual flow that the flow fitting function calculates water outlet pump into, completes the indirect measurement of pump capacity.
In a kind of specific embodiment of the embodiment of the present invention, the flow fitting function specifically:
Wherein, Q indicates that the actual flow for the water pump being calculated, f indicate the functional relation of fitting, Q0Indicate ideal situation
The flow of lower water pump, k1、k2、k3、k4Indicate that fitting coefficient, a and b indicate range ability coefficient；The fitting coefficient k1、k2、k3、
k4It is to carry out what Multiple Non Linear Regression was fitted after the data for obtaining several groups different difference power and water-head；Institute
Difference power is stated by the actual power value P and power-handling capability P of water pump0Make difference to obtain；Range ability the coefficient a and b are to be based on
Corresponding range ability obtains in Multiple Non Linear Regression fit procedure；In the preferred embodiment of the embodiment of the present invention,
The a=0.8, b=1.2；Fitting coefficient k1、k2、k3、k4And after range ability coefficient a and b can be corrected according to circumstances
Carry out the update of artificial remote parameter；
The meaning that the flow fitting function indicates are as follows:
When measuring terminals real-time monitor actual power 0W≤P < 0.05KW of water pump, then it represents that power at this time is smaller,
Usually curent change caused by the interference signal in pump working environment causes the fluctuation of power, and water pump does not have in off-mode
There is flow output, the actual flow Q of water pump is subjected to return-to-zero, i.e. Q=0 × P+0 × Δ h in flow fitting function；
As water pump actual power 0.05KW≤P < aP of measuring terminals real-time monitoring0, rapid increase is presented in power at this time
Trend, it is zooming straight that the performance number by being fitted this section can be found that an approximation is presented in the time series of actual power
Line relationship, water pump at this moment is in the state of idle running, although power rise is quickly, but also exports without flow,
The actual flow Q of water pump is also subjected to return-to-zero, i.e. Q=0 × P+0 × Δ h in flow fitting function；
As the water pump actual power aP of measuring terminals real-time monitoring0≤P≤bP0, power at this time is in aP0To bP0Between wave
Dynamic, the reality output flow of water pump is as the fluctuation of power and water-head is also in Q at this time0Fluctuation nearby, passes through nonlinear multivariable
The actual flow expression formula that fitting fitting obtains is Q=Q0+k1×(P-P0)+k2×Δh+k3×(P-P0) × Δ h, is denoted as function
One, at this moment pump working is in normal operating condition, while obtaining matched range ability to get the value of parameter a and b is arrived；
As the water pump actual power P > bP of measuring terminals real-time monitoring0, water pump at this time is in abnormal condition, water pump
Failure may be caused because of short circuit or stall, at this time the flow of the reality output of water pump and rated output flow Q0Between deposit
In certain multiple proportion；That is Q=k4×Q0, it is denoted as function two；
(5) actual flow for calculating water outlet pump is sent to remote monitoring terminal；
(6) judge the power supply situation of remote monitoring terminal, and make corresponding operation, specifically:
After judging that power down occurs in remote monitoring terminal, then stop measuring；
When judging that remote monitoring terminal is in power supply state, then constantly circulation carries out step (2)-(5).
In the specific implementation, the pump capacity indirect measurement method in the embodiment of the present invention is to be placed in measuring terminals in advance
, the flow fitting function is also to be placed in measuring terminals in advance.
Embodiment 2
Based on inventive concept same as Example 1, the embodiment of the invention provides a kind of pump capacities to measure dress indirectly
It sets, comprising:
First computing module makees poor obtain for obtaining actual water level value, and by the actual water level value and standard water place value
To water-head Δ h；
Module is obtained, for obtaining the actual power value P and power-handling capability P of water pump0；
Second computing module, for calling flow fitting function, and by the actual power value of the water-head Δ h, water pump
P, power-handling capability P0It brings the actual flow that the flow fitting function calculates water outlet pump into, completes the indirect survey of pump capacity
Amount.
Preferably, the flow fitting function specifically:
Wherein, Q indicates that the actual flow for the water pump being calculated, f indicate the functional relation of fitting, Q0Indicate ideal situation
The flow of lower water pump, k1、k2、k3、k4Indicate that fitting coefficient, a and b indicate range ability coefficient.
Further, the pump capacity indirect measurement system further includes sending module, for that will calculate the reality of water outlet pump
Border flow is sent to remote monitoring terminal.
Further, the pump capacity indirect measurement system further includes first judgment module, judges to need for working as
When the more fitting coefficient of new flow fitting function and range ability coefficient, then receives remote monitoring terminal and updated accordingly
Operation.
Further, the pump capacity indirect measurement system further includes the second judgment module, is remotely monitored for judging
The power supply situation of terminal, and corresponding operation is made, specifically:
After judging that power down occurs in remote monitoring terminal, then stop measuring；
When judging that remote monitoring terminal is in power supply state, then continuous the first computing module of recursive call, obtain module
With the second computing module, the actual flow of water outlet pump is calculated.
Rest part is same as Example 1.
Embodiment 3
Based on inventive concept same as Example 1, is measured indirectly the embodiment of the invention provides a kind of pump capacity and be
System, comprising:
Processor is adapted for carrying out each instruction；And
Equipment is stored, is suitable for storing a plurality of instruction, described instruction is suitable for being loaded by processor and being executed any in embodiment 1
Step described in.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The embodiment of the present invention is described in conjunction with attached drawing above, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (10)
1. a kind of pump capacity indirect measurement method characterized by comprising
(1) actual water level value is obtained, and the actual water level value and standard water place value are obtained into water-head Δ h as difference；
(2) the actual power value P and power-handling capability P of water pump are obtained0；
(3) flow fitting function is called, and by the water-head Δ h, the actual power value P of water pump, power-handling capability P0Bring institute into
The actual flow that flow fitting function calculates water outlet pump is stated, the indirect measurement of pump capacity is completed.
2. a kind of pump capacity indirect measurement method according to claim 1, which is characterized in that the flow fitting function
Specifically:
Wherein, Q indicates that the actual flow for the water pump being calculated, f indicate the functional relation of fitting, Q0Indicate that ideal situation is lauched
The flow of pump, k1、k2、k3、k4Indicate that fitting coefficient, a and b indicate range ability coefficient.
3. a kind of pump capacity indirect measurement method according to claim 1 or 2, which is characterized in that the pump capacity
Indirect measurement method further include:
The actual flow for calculating water outlet pump is sent to remote monitoring terminal；
When judging to need the more fitting coefficient of new flow fitting function and range ability coefficient, then long-range monitoring is received eventually
End carries out corresponding update and operates.
4. a kind of pump capacity indirect measurement method according to claim 2, it is characterised in that: the fitting coefficient k1、
k2、k3、k4It is to carry out Multiple Non Linear Regression after the data for obtaining several groups different difference power and water-head and be fitted to obtain
's；The difference power by water pump actual power value P and power-handling capability P0Make difference to obtain.
5. a kind of pump capacity indirect measurement method according to claim 4, it is characterised in that: the range ability coefficient
A and b is obtained based on range ability corresponding in Multiple Non Linear Regression fit procedure.
6. a kind of pump capacity indirect measurement method according to claim 5, it is characterised in that: the a=0.8, b=
1.2。
7. a kind of pump capacity indirect measurement method according to claim 3, it is characterised in that: the pump capacity is indirect
Measurement method further include:
After judging that power down occurs in remote monitoring terminal, then stop measuring；
When judging that remote monitoring terminal is in power supply state, then constantly circulation carries out step (1)-(3).
8. a kind of pump capacity indirect measurement system characterized by comprising
First computing module obtains water as difference for obtaining actual water level value, and by the actual water level value and standard water place value
Potential difference Δ h；
Module is obtained, for obtaining the actual power value P and power-handling capability P of water pump0；
Second computing module, for calling flow fitting function, and by the water-head Δ h, actual power value P, the volume of water pump
Determine performance number P0It brings the actual flow that the flow fitting function calculates water outlet pump into, completes the indirect measurement of pump capacity.
9. a kind of pump capacity indirect measurement system according to claim 8, which is characterized in that the flow fitting function
Specifically:
Wherein, Q indicates that the actual flow for the water pump being calculated, f indicate the functional relation of fitting, Q0Indicate that ideal situation is lauched
The flow of pump, k1、k2、k3、k4Indicate that fitting coefficient, a and b indicate range ability coefficient.
10. a kind of pump capacity indirect measurement systems characterized by comprising
Processor is adapted for carrying out each instruction；And
Equipment is stored, is suitable for storing a plurality of instruction, described instruction is suitable for by processor load and perform claim requires to appoint in 1~7
Step described in one.
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| CN110345055A (en) * | 2019-07-03 | 2019-10-18 | 东莞市水利勘测设计院有限公司 | A kind of drainage pumping stations water drainage amount information monitoring method and system |
| CN113741562A (en) * | 2021-08-31 | 2021-12-03 | 广州多钛克机械科技有限公司 | Waterlogging drainage robot monitoring method and waterlogging drainage robot |
| CN115327888A (en) * | 2022-08-22 | 2022-11-11 | 宁波奥克斯电气股份有限公司 | PID algorithm of circulating water pump flow, direct-current circulating water pump and air energy heat pump |
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Application publication date: 20190514 |