CN111337111A - Calibration device and method for variable water head water flow standard device - Google Patents

Calibration device and method for variable water head water flow standard device Download PDF

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Publication number
CN111337111A
CN111337111A CN202010250259.7A CN202010250259A CN111337111A CN 111337111 A CN111337111 A CN 111337111A CN 202010250259 A CN202010250259 A CN 202010250259A CN 111337111 A CN111337111 A CN 111337111A
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water
standard
flow
flowmeter
volume
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朱碧玉
张进明
刘夷平
李雪菁
陈超
姚新红
李海洋
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Shanghai Institute of Measurement and Testing Technology
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Shanghai Institute of Measurement and Testing Technology
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Priority to CN202010250259.7A priority Critical patent/CN111337111A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • G01F25/13Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a reference counter
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • G01F25/14Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a weighing apparatus

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Flow Control (AREA)

Abstract

The invention belongs to the technical field of flow calibration, and discloses a calibration device for a variable water head water flow standard device, which comprises a pressure stabilizing water tower, the pressure stabilizing water tower is connected with a standard flowmeter, a water pump, a water quantity weigher and a water tank through a water direction adjusting module, the water direction adjusting module, the standard flowmeter, the water quantity weigher and the calibrated variable head water flow standard device are all connected with the processor, the processor controls liquid water in a pressure stabilizing water tower, a standard flowmeter, a water pump, a water quantity weigher and a water tank through a water direction adjusting module, and the flow direction between the corrected variable head water flow standard devices, firstly completing the calculation of the instrument coefficient or the flow correction value of the standard flowmeter, and then completing the volume calculation of each volume section of the volume section water tower in the corrected variable head water flow standard devices, thereby realizing the automatic calibration of the corrected variable head water flow standard devices. A calibration method for the variable head water flow rate calibration device is also disclosed.

Description

Calibration device and method for variable water head water flow standard device
Technical Field
The invention belongs to the technical field of flow calibration, and particularly relates to a calibration device and method for a variable water head water flow standard device.
Background
At present, the large-diameter liquid flow meter undertakes flow measurement tasks of enterprise production water, urban domestic water, sewage discharge and the like. According to the current national verification regulation, a static volumetric method or a static mass method is generally used for verifying the liquid flowmeter, a water flow standard device based on the methods needs a stable pressure source and is generally realized by using a high-level water tower or a pressure stabilizing container, in order to keep constant pressure in the verification process, the high-level water tower must keep an overflow state of continuous water supply, the energy consumption is high, the device efficiency is low, so that a plurality of domestic and foreign enterprises manufacture a dynamic volumetric method water flow standard device based on a variable head principle, a volumetric section water tower is adopted, a plurality of liquid level meters are arranged on the water tower, and the volume between every two liquid level meters is a standard volumetric section. When the variable head water flow standard device works, the flow also drops along with the drop of the water level in the water tower, the flow is basically kept constant by continuously increasing the opening degree of the flow regulating valve, the variable head water flow standard device has obvious advantages in the aspects of reducing energy consumption and effectively utilizing water resources, the metering of the device is a key technology for ensuring the accuracy of the variable head water flow standard device, and no device or method capable of comprehensively metering the variable head water flow standard device exists at present.
Disclosure of Invention
The invention provides a calibration device and a calibration method for a variable head water flow standard device, which make up for the domestic blank of calibration of the variable head water flow standard device and provide a measurement technical guarantee for the quantity value tracing of products such as a large-caliber liquid flowmeter.
The invention can be realized by the following technical scheme:
a calibrating device for a variable head water flow standard device comprises a pressure stabilizing water tower, wherein the pressure stabilizing water tower is connected with a standard flowmeter, a water pump, a water quantity weigher and a water tank through a water direction adjusting module, the water direction adjusting module, the standard flowmeter, the water quantity weigher and the calibrated variable head water flow standard device are all connected with the processor, the processor controls liquid water in a pressure stabilizing water tower, a standard flowmeter, a water pump, a water quantity weigher and a water tank through a water direction adjusting module, and the flow direction between the corrected variable head water flow standard devices, firstly completing the calculation of the instrument coefficient or the flow correction value of the standard flowmeter, and then completing the volume calculation of each volume section of the volume section water tower in the corrected variable head water flow standard devices, thereby realizing the automatic calibration of the corrected variable head water flow standard devices.
Furthermore, the processor controls the flow direction of the liquid water among the pressure stabilizing water tower, the standard flowmeter, the water pump, the water quantity weighing device and the water tank through the water direction adjusting module, and then controls the flow direction of the liquid water among the standard flowmeter, the water tank and the corrected water head water flow rate standard device.
Further, water includes flow control valve to adjusting module, flow control valve loops through standard flowmeter, first solenoid valve and steady voltage water tower intercommunication, through second solenoid valve and pond intercommunication, through commutator and water yield weigher, pond intercommunication, the water yield weigher passes through third solenoid valve and pond intercommunication, the pond passes through water pump, fourth solenoid valve and steady voltage water tower intercommunication, standard flowmeter passes through the fifth solenoid valve and is linked together by school variable head water flow standard device.
Further, by school variable head water flow standard device including the volume section water tower, each level gauge on the volume section water tower all links to each other with the treater, and it also communicates with first pond through seventh solenoid valve, first water pump through sixth solenoid valve with first pond intercommunication, through fifth solenoid valve and standard flowmeter intercommunication.
Further, the water volume weigher comprises an electronic scale, and a container for containing water is arranged on the electronic scale.
The calibration method for the calibration device for the variable head water flow standard device comprises the steps of controlling the water direction adjusting module to close communication with the calibrated variable head water flow standard device, completing calculation of instrument coefficients of the standard flowmeter, then opening communication with the calibrated variable head water flow standard device, and completing calculation of the volume of each volume section of a water tower in the volume section of the calibrated variable head water flow standard device, so that calibration of the calibrated variable head water flow standard device is realized.
Further, the step of completing the meter coefficient calculation of the standard flowmeter comprises the following steps:
step one, closing a fifth electromagnetic valve and a second electromagnetic valve, shifting a commutator to a position of a flowing water tank, opening a fourth electromagnetic valve and a water pump, and injecting water into the pressure-stabilizing water tower until an overflow pipe overflows;
step two, opening a third electromagnetic valve, and discharging water in the container into a water tank until the reading of the electronic scale is zero;
opening a first electromagnetic valve, and enabling the flow passing through the standard flowmeter to reach a set value by adjusting a flow regulating valve;
step four, closing the third electromagnetic valve, shifting the commutator to the position of the water quantity weigher, starting to count the pulse number of the standard flowmeter, stopping counting the pulses of the standard flowmeter after a preset time, simultaneously shifting the commutator to the position of the flow direction water tank, and reading the indication value m of the electronic scale and the accumulated pulse value N of the standard flowmeter;
calculating the volume V of the corresponding water according to the indicating value m of the electronic scale, and then calculating the meter coefficient K of the standard flowmeter measured at this time by using the following equation;
K=N/V
and step six, repeating the step two to the step five to obtain a plurality of groups of instrument coefficients K, and calculating the average value Km of the instrument coefficients K.
Further, the volume calculation of each volume section of the volume section water tower in the calibrated variable water head water flow standard device comprises the following steps:
step I, closing the first electromagnetic valve, the fourth electromagnetic valve and the water pump to stop the pressure stabilizing water tower;
step II, closing the sixth electromagnetic valve, opening the seventh electromagnetic valve and the first water pump, injecting water into the volume section water tower until the water level exceeds a first liquid level meter on the volume section water tower, and closing the first water pump;
step III, opening a fifth electromagnetic valve and a second electromagnetic valve, and adjusting a flow regulating valve to enable the flow passing through the standard flowmeter to reach the set value;
and IV, counting the number of pulses of the standard flowmeter when the water level of the water tower in the volume section is lowered to a first liquid level, recording the accumulated pulse number N1 of the standard flowmeter corresponding to the time from the first liquid level meter to the second liquid level meter when the water level is lowered to a second liquid level, recording the accumulated pulse number N2 of the standard flowmeter corresponding to the time from the second liquid level meter to the third liquid level meter when the water level is lowered to a third liquid level, recording the accumulated pulse number N3 of the standard flowmeter corresponding to the time from the third liquid level meter to the fourth liquid level meter when the water level is lowered to a fourth liquid level, and so on to obtain the accumulated pulse number Nm of each volume section corresponding to the standard flowmeter.
And step V, calculating the volume Vm of each volume segment by using the equation Vm as Nm/Km.
And VI, repeating the steps II to V to obtain a plurality of groups of volume values, calculating corresponding average values of the volume values to obtain the volume of each volume section of the volume section water tower, and setting the volume of each volume section to a variable water head water flow rate standard device for calibrating the calibrated flowmeter.
The beneficial technical effects of the invention are as follows:
the flow direction of liquid water among the pressure stabilizing water tower, the standard flowmeter, the water pump, the water quantity weigher, the water pool and the corrected variable water head water flow standard device is controlled through the water direction adjusting module, the calculation of the instrument coefficient of the standard flowmeter is completed firstly, and then the volume calculation of each volume section of the water tower in the volume section in the corrected variable water head water flow standard device is completed, so that the automatic calibration of the corrected variable water head water flow standard device is realized, the metering accuracy of the variable water head water flow standard device is improved, the metering technical guarantee is provided for the quantity tracing of products such as a large-caliber liquid flowmeter, the energy is effectively developed and utilized for the society, and the effective implementation of energy conservation and emission reduction targets of industrial enterprises has important influence.
Drawings
FIG. 1 is a schematic view of the structural connection of the calibration device of the present invention;
the system comprises a pressure stabilizing water tower, a standard flowmeter, a water pump, a 4-water tank, a volume section water tower, a flow regulating valve, a commutator, a first water tank, a first water pump, an electronic scale, a container and a flat-plate device, wherein the pressure stabilizing water tower is 1, the standard flowmeter is 2, the water pump is 3, the water tank is 4, the volume section water tower is 5, the flow regulating valve is 6, the commutator is 7.
Detailed Description
The following detailed description of the preferred embodiments will be made with reference to the accompanying drawings.
Compared with the existing liquid flow standard device adopting a static mass method and a dynamic volume method based on a variable head principle, the dynamic volume method based water flow standard device based on the variable head principle has obvious advantages in the aspects of reducing energy consumption and effectively utilizing water resources, is particularly suitable for calibrating large-caliber flow meters, and more flow meter manufacturers adopt the mode, so that the calibration of the standard device becomes more and more urgent The flow direction among the standard flowmeter 2, the water pump 3, the water quantity weigher, the water pool 4 and the corrected water head water flow standard device is firstly calculated on the instrument coefficient or the flow correction value of the standard flowmeter 2, and then the volume calculation of each volume section of the volume section water tower 5 in the corrected water head water flow standard device is completed, so that the automatic calibration of the corrected water head water flow standard device is realized.
Specifically, the processor controls the flow direction of liquid water among the pressure stabilizing water tower 1, the standard flowmeter 2, the water pump 3, the water quantity weigher and the water tank 4 through the water direction adjusting module, and then controls the flow direction of the liquid water among the standard flowmeter 2, the water tank 4 and the corrected water head water flow rate standard device.
This water includes flow control valve 6 to adjusting module, this flow control valve 6 loops through standard flowmeter 2, first solenoid valve and steady voltage water tower 1 intercommunication, through second solenoid valve and 4 intercommunications in pond, through commutator 7 and water yield weigher, 4 intercommunications in pond, this water yield weigher passes through third solenoid valve and 4 intercommunications in pond, this pond 4 passes through water pump 3, fourth solenoid valve and steady voltage water tower 1 intercommunication, this standard flowmeter 2 passes through the fifth solenoid valve and is linked together by school variable water head water flow standard device. This by school variable head water flow standard device includes volume section water tower 5, and each level gauge on this volume section water tower 5 all links to each other with the treater, and it also communicates with first pond 8 through seventh solenoid valve, first water pump 9 through sixth solenoid valve and first pond 8 intercommunication, communicates with standard flowmeter 2 through fifth solenoid valve.
Wherein, the pressure-stabilizing water tower 1 comprises a high-level water tower or a pressure-stabilizing container, which is used for providing a stable pressure source and keeping a constant flow in the pipeline without time variation; each electromagnetic valve can be a valve with different principles such as a butterfly valve, a ball valve and the like and is used for controlling the opening or closing of each pipeline in the whole calibration device, and the flow regulating valve 6 is used for regulating the instantaneous flow passing through the standard flowmeter 2; the standard flowmeter 2 is used as a transmission standard, and an electromagnetic flowmeter with the repeatability superior to 0.02 percent is generally selected; the water quantity weigher comprises an electronic scale 10, wherein a container 11 for containing water is arranged on the electronic scale 10, the container 11 is used for containing the water flowing through a standard flowmeter 2, and the water is weighed by an electronic scale 9 so as to calculate the volume of the corresponding water; the water tank is used for storing water to realize water circulation, the water pump 3 pumps the water into the pressure stabilizing water tower, and the water in the container or the pipeline can be discharged into the water tank.
The processor can be realized by a flat-plate device 12 and is used for monitoring the calibrating device of the whole variable head water flow standard device, and the calibrating device comprises a control valve opening, a control water pump 3, a control standard flowmeter 2, a control commutator 7, a display electronic scale 9, a water volume converted by the display electronic scale, a display standard flowmeter 2 pulse coefficient, a storage calibrating data and the like.
The invention also provides a calibration method for the calibration device for the variable head water flow standard device, which is based on the calibration method, and the calibration method comprises the steps of closing the communication between the calibration device and the variable head water flow standard device by controlling the water direction adjusting module, completing the calculation of the instrument coefficient of the standard flowmeter, then opening the communication between the calibration device and the variable head water flow standard device, and completing the volume calculation of each volume section of the volume section water tower in the variable head water flow standard device, thereby realizing the calibration of the variable head water flow standard device.
The method for completing the calculation of the meter coefficient of the standard flowmeter comprises the following steps:
step one, closing a fifth electromagnetic valve and a second electromagnetic valve, shifting a commutator to a position of a flowing water tank, opening a fourth electromagnetic valve and a water pump, and injecting water into the pressure-stabilizing water tower until an overflow pipe overflows;
step two, opening a third electromagnetic valve, and discharging water in the container into a water tank until the reading of the electronic scale is zero;
opening a first electromagnetic valve, and adjusting a flow regulating valve to enable the flow passing through the standard flowmeter to reach a set value, wherein a flow point with the best repeatability of the standard flowmeter is generally used, such as 50% of a full range;
step four, closing the third electromagnetic valve, shifting the commutator to the position of the water quantity weighing device, starting to count the pulse number of the standard flowmeter, stopping counting the pulses of the standard flowmeter after a preset time such as 60 seconds, simultaneously shifting the commutator to the position of the flow direction water tank, and reading the indication value m of the electronic scale and the pulse accumulated value N of the standard flowmeter;
calculating the volume V of the corresponding water according to the indicating value m of the electronic scale, and then calculating the meter coefficient K of the standard flowmeter measured at this time by using the following equation;
K=N/V
and step six, repeating the step two to the step five to obtain a plurality of groups of instrument coefficients K, such as six groups, and calculating the average value Km of the instrument coefficients.
If the standard flowmeter does not use the meter coefficient, the standard flowmeter is started to count the flow value, and the flow value is measured throughAfter a preset time such as 60 seconds, stopping the accumulative calculation of the flow value, simultaneously switching the commutator to the position of a flow direction pool, reading the value of the electronic scale, namely the mass m of the water, obtaining the volume V of the water after the correction of the water temperature, the density of the water and the air buoyancy, simultaneously reading the flow accumulative value Vc of a standard flowmeter, calculating the flow corrected value sigma of a standard table measured at this time by using the equation sigma V/Vc, and similarly, repeating the process for a plurality of times, and calculating the average value sigma of the flow corrected value sigmam
The volume calculation of each volume section of the volume section water tower in the calibrated variable water head water flow standard device comprises the following steps:
step I, closing the first electromagnetic valve, the fourth electromagnetic valve and the water pump to stop the pressure stabilizing water tower;
step II, closing the sixth electromagnetic valve, opening the seventh electromagnetic valve and the first water pump, injecting water into the volume section water tower until the water level exceeds a first liquid level meter on the volume section water tower, and closing the first water pump;
step III, opening a fifth electromagnetic valve and a second electromagnetic valve, and adjusting a flow regulating valve to enable the flow passing through the standard flowmeter to reach the set value;
and IV, counting the number of pulses of the standard flowmeter when the water level of the water tower in the volume section is lowered to a first liquid level, recording the accumulated pulse number N1 of the standard flowmeter corresponding to the time from the first liquid level meter to the second liquid level meter when the water level is lowered to a second liquid level, recording the accumulated pulse number N2 of the standard flowmeter corresponding to the time from the second liquid level meter to the third liquid level meter when the water level is lowered to a third liquid level, recording the accumulated pulse number N3 of the standard flowmeter corresponding to the time from the third liquid level meter to the fourth liquid level meter when the water level is lowered to a fourth liquid level, and so on to obtain the accumulated pulse number Nm of each volume section corresponding to the standard flowmeter.
And step V, calculating the volume Vm of each volume segment by using the equation Vm as Nm/Km.
Similarly, if the standard flowmeter does not use the meter coefficient, the flow rate integrated values Vc1 and Vc2 … Vcm … are recorded in step IV, and the volume of each volume segment in step VVm=Vcm*σm
And VI, repeating the steps II to V to obtain a plurality of groups of volume values, calculating corresponding average values of the volume values to obtain the volume of each volume section of the volume section water tower, and setting the volume of each volume section to a variable water head water flow rate standard device for calibrating the calibrated flowmeter.
During the entire calibration process, some uncertainty components are introduced, such as tower thermal expansion coefficient, liquid temperature, electronic scales, volume calibration repeatability, commutators, dynamic effects of individual level gauges, standard flow meter repeatability, etc. These uncertainties are analyzed and combined to obtain the extended uncertainty of a variable head water flow rate standard device, such as 0.06% (k ═ 2), which can be used to calibrate a 0.2-stage large-caliber liquid flow meter.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is therefore defined by the appended claims.

Claims (8)

1. A calibrating device for a variable head water flow standard device is characterized in that: the device comprises a pressure stabilizing water tower, wherein the pressure stabilizing water tower is communicated with a standard flowmeter, a water pump, a water quantity weigher and a water tank through a water direction adjusting module, the standard flowmeter, the water quantity weigher and a corrected water head water flow standard device are all connected with a processor, the processor controls the flow direction of liquid water among the pressure stabilizing water tower, the standard flowmeter, the water pump, the water quantity weigher and the water tank and among the corrected water head water flow standard devices through the water direction adjusting module, firstly completes calculation of an instrument coefficient or a flow correction value of the standard flowmeter, and then completes calculation of the volume of each volume section of the water tower in the corrected water head water flow standard device, so that the corrected water head water flow standard device is calibrated.
2. The calibration device for a variable head water flow rate standard device according to claim 1, wherein: the processor controls the flow direction of liquid water among the pressure stabilizing water tower, the standard flowmeter, the water pump, the water quantity weigher and the water tank through the water direction adjusting module, and then controls the flow direction of the liquid water among the standard flowmeter, the water tank and the corrected water head water flow standard device.
3. The calibration device for a variable head water flow rate standard device according to claim 2, wherein: the water is to adjusting module includes flow control valve, flow control valve loops through standard flowmeter, first solenoid valve and steady voltage water tower intercommunication, through second solenoid valve and pond intercommunication, through commutator and water yield weighing device, pond intercommunication, the water yield weighing device passes through third solenoid valve and pond intercommunication, the pond passes through water pump, fourth solenoid valve and steady voltage water tower intercommunication, the standard flowmeter passes through the fifth solenoid valve and is linked together by school variable head water flow standard device.
4. The calibration device for a variable head water flow rate standard device according to claim 3, wherein: the calibrated variable water head water flow standard device comprises a volume section water tower, wherein each liquid level meter on the volume section water tower is connected with a processor, is communicated with a first water tank through a sixth electromagnetic valve, is also communicated with the first water tank through a seventh electromagnetic valve and a first water pump, and is communicated with a standard flow meter through a fifth electromagnetic valve.
5. The calibration device for a variable head water flow rate standard device according to claim 1, wherein: the water quantity weighing device comprises an electronic scale, and a container for containing water is arranged on the electronic scale.
6. A calibration method for a calibration device for a variable head water flow rate standard device according to claim 1, characterized in that: the communication between the standard device and the corrected variable head water flow standard device is closed by controlling the water direction adjusting module, the calculation of the instrument coefficient of the standard flowmeter is completed firstly, then the communication between the standard device and the corrected variable head water flow standard device is opened, the volume calculation of each volume section of the volume section water tower in the corrected variable head water flow standard device is completed, and therefore the correction of the corrected variable head water flow standard device is achieved.
7. The calibration method for a variable head water flow rate calibration device according to claim 6, wherein the step of performing the meter coefficient calculation for the standard flowmeter comprises the steps of:
step one, closing a fifth electromagnetic valve and a second electromagnetic valve, shifting a commutator to a position of a flowing water tank, opening a fourth electromagnetic valve and a water pump, and injecting water into the pressure-stabilizing water tower until an overflow pipe overflows;
step two, opening a third electromagnetic valve, and discharging water in the container into a water tank until the reading of the electronic scale is zero;
opening a first electromagnetic valve, and enabling the flow passing through the standard flowmeter to reach a set value by adjusting a flow regulating valve;
step four, closing the third electromagnetic valve, shifting the commutator to the position of the water quantity weigher, starting to count the pulse number of the standard flowmeter, stopping counting the pulses of the standard flowmeter after a preset time, simultaneously shifting the commutator to the position of the flow direction water tank, and reading the indication value m of the electronic scale and the accumulated pulse value N of the standard flowmeter;
calculating the volume V of the corresponding water according to the indicating value m of the electronic scale, and then calculating the meter coefficient K of the standard flowmeter measured at this time by using the following equation;
K=N/V
and step six, repeating the step two to the step five to obtain a plurality of groups of instrument coefficients K, and calculating the average value Km of the instrument coefficients K.
8. The method of calibrating a variable head water flow rate standard device of claim 7, wherein the step of performing volumetric calculations on each volumetric section of the water tower in the calibrated variable head water flow rate standard device comprises the steps of:
step I, closing the first electromagnetic valve, the fourth electromagnetic valve and the water pump to stop the pressure stabilizing water tower;
step II, closing the sixth electromagnetic valve, opening the seventh electromagnetic valve and the first water pump, injecting water into the volume section water tower until the water level exceeds a first liquid level meter on the volume section water tower, and closing the first water pump;
step III, opening a fifth electromagnetic valve and a second electromagnetic valve, and adjusting a flow regulating valve to enable the flow passing through the standard flowmeter to reach the set value;
and IV, counting the number of pulses of the standard flowmeter when the water level of the water tower in the volume section is lowered to a first liquid level, recording the accumulated pulse number N1 of the standard flowmeter corresponding to the time from the first liquid level meter to the second liquid level meter when the water level is lowered to a second liquid level, recording the accumulated pulse number N2 of the standard flowmeter corresponding to the time from the second liquid level meter to the third liquid level meter when the water level is lowered to a third liquid level, recording the accumulated pulse number N3 of the standard flowmeter corresponding to the time from the third liquid level meter to the fourth liquid level meter when the water level is lowered to a fourth liquid level, and so on to obtain the accumulated pulse number Nm of each volume section corresponding to the standard flowmeter.
And step V, calculating the volume Vm of each volume segment by using the equation Vm as Nm/Km.
And VI, repeating the steps II to V to obtain a plurality of groups of volume values, calculating corresponding average values of the volume values to obtain the volume of each volume section of the volume section water tower, and setting the volume of each volume section to a variable water head water flow rate standard device for calibrating the calibrated flowmeter.
CN202010250259.7A 2020-04-01 2020-04-01 Calibration device and method for variable water head water flow standard device Pending CN111337111A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112212949A (en) * 2020-09-21 2021-01-12 广州能源检测研究院 Mechanical water meter calibration method and device based on laser sensor
CN114942059A (en) * 2022-04-09 2022-08-26 深圳天溯计量检测股份有限公司 On-line flowmeter calibration method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112212949A (en) * 2020-09-21 2021-01-12 广州能源检测研究院 Mechanical water meter calibration method and device based on laser sensor
CN112212949B (en) * 2020-09-21 2023-11-10 广州能源检测研究院 Mechanical water meter verification method and device based on laser sensor
CN114942059A (en) * 2022-04-09 2022-08-26 深圳天溯计量检测股份有限公司 On-line flowmeter calibration method
CN114942059B (en) * 2022-04-09 2022-11-25 深圳天溯计量检测股份有限公司 On-line flowmeter calibration method

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