CN110095169A - A kind of ultrasonic water meter calibration equipment and method of calibration - Google Patents
A kind of ultrasonic water meter calibration equipment and method of calibration Download PDFInfo
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- CN110095169A CN110095169A CN201910320963.2A CN201910320963A CN110095169A CN 110095169 A CN110095169 A CN 110095169A CN 201910320963 A CN201910320963 A CN 201910320963A CN 110095169 A CN110095169 A CN 110095169A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/17—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using calibrated reservoirs
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Abstract
The invention discloses a kind of ultrasonic water meter calibration equipment and method of calibration, the system is a loop system being made of water storage constant pressure water supply system, automatically controlled water supply valve, water pump composite stage body, flowmeter, automatically controlled throttle valve, normal volume container and automatically controlled Draw off valve.Checking flow point needed for the present invention uses flow meter calibration water meter to be verified, and then generate the corresponding table of checking flow point and automatically controlled throttle valve opening, while realizing accurate control checking flow, by the data communication channel of the intelligent flows instrument such as ultrasonic water meter, the automatic detection and correction of instrument is rapidly completed.
Description
Technical field
The invention belongs to intelligent flow instrument accuracy calibration technology fields, and in particular to a kind of ultrasonic water meter verification dress
It sets and the design of method of calibration.
Background technique
Currently, the flow accuracy checking device of ultrasonic water meter generallys use each school of manually or automatically throttle valve adjustment
Uninterrupted a little is tested, compares measuring volume or measuring matter for instrument to be verified with normal volume container or standard quality container
Amount, calculates the flow measurement accuracy of instrument to be verified.Wherein, manual throttle valve is widely used in non intelligent because cheap reliable
In the verification of type water meter, but its adjustment process is slow and cannot achieve automatic change checkpoint.Automatic throttle generallys use closed loop
Feedback regulation flow is easy to generate flowed fluctuation because of environmental disturbances.In addition there are the fixed point adjustings using multiple independent flow passages
Valve is opened and closed by switching each independent flow passage, changes checkpoint, but device complex and expensive, and after replacing instrument to be verified, is needed
Air in each independent flow passage is discharged, operating process is cumbersome.Also, the calibration equipment of existing ultrasonic water meter is logical
Checkpoint flow is often only given, the accuracy of measuring of instrument to be verified cannot be directly given, can not be automatically performed to be verified
The correction of instrument.
Summary of the invention
The purpose of the present invention is to solve existing ultrasonic water meter calibration equipments cannot take into account verification accuracy and verification
The problem of speed, proposes a kind of ultrasonic water meter calibration equipment and method of calibration, in the premise for guaranteeing checking procedure accuracy
Under, verification speed is improved, person works' efficiency is improved.
The technical solution of the present invention is as follows: a kind of ultrasonic water meter calibration equipment, including water storage constant pressure water supply system, automatically controlled confession
Penstock, water pump composite stage body, flowmeter, automatically controlled throttle valve, normal volume container and automatically controlled Draw off valve；Water storage constant pressure supplies
The water outlet of water system is connect by water supply line with the water inlet of normal volume container, and electricity is sequentially installed on water supply line
Control water supply valve, water meter to be verified, flowmeter and automatically controlled throttle valve, water meter to be verified are mounted on water pump composite stage body, are stored up
The water inlet of water constant pressure water supply system is connect by blow-off line with the water outlet of normal volume container, and is installed on blow-off line
There is automatically controlled Draw off valve.
Further, water level alarm is provided in normal volume container.
Further, ultrasonic water meter calibration equipment further includes computer control system, the data of computer control system
Acquisition port connect with flowmeter and water level alarm respectively, the control output end of computer control system mouthful respectively with it is automatically controlled
Throttle valve, automatically controlled water supply valve and the connection of automatically controlled Draw off valve, the bidirectional data communication interface difference of computer control system
It is connect with each water meter to be verified.
The present invention also provides a kind of ultrasonic water meter calibration methods, comprising the following steps:
S1, flow calibration is carried out to ultrasonic water meter calibration equipment, obtains checking flow point and automatically controlled throttle valve opening
Corresponding table.
S2, automatically controlled water supply valve and automatically controlled Draw off valve are opened by computer control system, and according to corresponding table tune
Economize on electricity control throttle valve opening is discharged on water supply line and water supply line in each equipment runner to the common flow of water meter to be verified
Air.
S3, flow meter data is acquired by computer control system, and finely tunes the flow of water meter to be verified to setting range,
Record fine tuning ratio.
S4, automatically controlled water supply valve is closed by computer control system, after normal volume vessel empty, closes automatically controlled put
Penstock records the original volumetric data of water meter to be verified.
S5, according to corresponding table and the flow of the automatically controlled throttle valve opening of proportion adjustment to checking flow point is finely tuned.
S6, automatically controlled water supply valve is opened by computer control system, when the water level alarm in normal volume container produces
After raw alarm signal, automatically controlled water supply valve is closed.
S7, it is no longer changed when the water of normal volume container, and after data of water meter to be verified is no longer changed, beats
Open automatically controlled Draw off valve.
S8, after normal volume vessel empty, close automatically controlled Draw off valve, record the checkpoint volume number of water meter to be verified
According to.
S9, the relative error that water meter to be verified is calculated according to original volumetric data and checkpoint volume data.
S10, error correction is carried out to the water meter to be verified that relative error is more than error threshold by computer control system.
S11, the checkpoint volume data for verifying this repeat step S5 as the original volumetric data verified next time
~S10, until completing the verification to each checking flow point of each water meter to be verified.
Further, step S1 specifically:
By water pump composite to be verified on water pump composite stage body, measurement obtains the reality of each checking flow point of water meter to be verified
Border flow, and the corresponding automatically controlled throttle valve opening of each checking flow point is recorded, it generates checking flow point and is opened with automatically controlled throttle valve
The correspondence table of degree when replacing the specification of water meter to be verified every time, re-measures and generates checking flow point and automatically controlled throttle valve
The correspondence table of aperture.
Further, in step S9 the relative error of water meter to be verified calculation formula are as follows:
Wherein δnIndicate the relative error of n-th of water meter to be verified, Vn1Indicate the checkpoint volume of n-th of water meter to be verified
Data, Vn0Indicating the original volumetric data of n-th of water meter to be verified, V indicates the actual volume of normal volume container, n=1,
2 ..., N, N are water meter sum to be verified.
Further, step S10 specifically:
Correction is sent by the water meter to be verified that two-way relative error is more than error threshold using computer control system to refer to
It enables, the microcontroller inside water meter to be verified makes response after receiving correction instruction, modifies internal correction table, and according to repairing
Correction table after changing is corrected the data of checking flow point, using linear interpolation correction method in two checking flow points
Between measurement result be corrected.
The beneficial effects of the present invention are:
(1) present invention is using checking flow point needed for flow meter calibration water meter to be verified, so generate checking flow point with
The correspondence table of automatically controlled throttle valve opening, while realizing accurate control checking flow, by intelligence flows such as ultrasonic water meters
The automatic detection and correction of instrument is rapidly completed in the data communication channel for measuring instrument.
(2) present invention by computer control system in calibration equipment remaining equipment carry out data acquisition, control and
Two-way communication realizes the intelligence verification to ultrasonic water flow-meter accuracy, effectively increases verification speed and accuracy.
(3) water level alarm is arranged in normal volume container in the present invention, when the water arrival in normal volume container is set
It alarms when definite value, and automatically controls the switch of automatically controlled Draw off valve by alarm signal, be not necessarily to artificial judgment criteria volume
Water in container effectively increases verification speed and accuracy.
(4) calibration equipment provided by the invention forms a closed-loop system, and the water in normal volume container eventually returns
It flows into water storage constant pressure water supply system to be recycled, has saved water resource.
Detailed description of the invention
Fig. 1 show a kind of ultrasonic water meter calibration equipment structural block diagram of the offer of the embodiment of the present invention one.
Fig. 2 show a kind of ultrasonic water meter calibration equipment control block diagram of the offer of the embodiment of the present invention one.
Fig. 3 show a kind of ultrasonic water meter calibration method flow chart provided by Embodiment 2 of the present invention.
Specific embodiment
Carry out detailed description of the present invention illustrative embodiments with reference to the drawings.It should be appreciated that shown in attached drawing and
The embodiment of description is only exemplary, it is intended that is illustrated the principle and spirit of the invention, and is not limited model of the invention
It encloses.
Embodiment one:
The embodiment of the invention provides a kind of ultrasonic water meter calibration equipments, as shown in Figure 1, including water storage constant pressure water supply system
System, automatically controlled water supply valve, water pump composite stage body, flowmeter, automatically controlled throttle valve, normal volume container and automatically controlled Draw off valve.
The water outlet of water storage constant pressure water supply system is connect by water supply line with the water inlet of normal volume container, and on water supply line according to
Secondary to be equipped with automatically controlled water supply valve, water meter to be verified, flowmeter and automatically controlled throttle valve, water meter to be verified is mounted on water pump composite
On stage body, the water inlet of water storage constant pressure water supply system is connect by blow-off line with the water outlet of normal volume container, and is discharged water
Automatically controlled Draw off valve is installed on pipeline.Water storage constant pressure water supply system, automatically controlled water supply valve, water pump composite stage body, flowmeter, electricity
Control throttle valve, normal volume container and automatically controlled Draw off valve collectively form an annular closed-loop system.
Wherein, water level alarm is provided in normal volume container.
In the embodiment of the present invention, as shown in Figure 1,4 water meters to be verified can be installed on water pump composite stage body simultaneously.
As shown in Fig. 2, ultrasonic water meter calibration equipment further includes computer control system, the data of computer control system
Acquisition port connect with flowmeter and water level alarm respectively, the control output end of computer control system mouthful respectively with it is automatically controlled
Throttle valve, automatically controlled water supply valve and the connection of automatically controlled Draw off valve, the bidirectional data communication interface difference of computer control system
It is connect with each water meter to be verified.
Embodiment two:
The embodiment of the invention provides a kind of ultrasonic water meter calibration methods, as shown in figure 3, include the following steps S1~
S11:
S1, flow calibration is carried out to ultrasonic water meter calibration equipment, obtains checking flow point and automatically controlled throttle valve opening
Corresponding table.
By water pump composite to be verified on water pump composite stage body, measurement obtains the reality of each checking flow point of water meter to be verified
Border flow, and the corresponding automatically controlled throttle valve opening of each checking flow point is recorded, it generates checking flow point and is opened with automatically controlled throttle valve
The correspondence table of degree.When replacing the specification of water meter to be verified every time, need to re-measure and generate checking flow point and automatically controlled section
Flow the correspondence table of valve opening.
S2, automatically controlled water supply valve and automatically controlled Draw off valve are opened by computer control system, and according to corresponding table tune
Economize on electricity control throttle valve opening is discharged on water supply line and water supply line in each equipment runner to the common flow of water meter to be verified
Air.
S3, flow meter data is acquired by computer control system, and finely tunes the flow of water meter to be verified to setting range,
Record fine tuning ratio.
S4, automatically controlled water supply valve is closed by computer control system, after normal volume vessel empty, closes automatically controlled put
Penstock records the original volumetric data of water meter to be verified.
S5, according to corresponding table and the flow of the automatically controlled throttle valve opening of proportion adjustment to checking flow point is finely tuned.
S6, automatically controlled water supply valve is opened by computer control system, when the water level alarm in normal volume container produces
After raw alarm signal, automatically controlled water supply valve is closed.
S7, it is no longer changed when the water of normal volume container, and after data of water meter to be verified is no longer changed, beats
Open automatically controlled Draw off valve.
S8, after normal volume vessel empty, close automatically controlled Draw off valve, record the checkpoint volume number of water meter to be verified
According to.
S9, the relative error that water meter to be verified is calculated according to original volumetric data and checkpoint volume data are calculated
Formula are as follows:
Wherein δnIndicate the relative error of n-th of water meter to be verified, Vn1Indicate the checkpoint volume of n-th of water meter to be verified
Data, Vn0Indicating the original volumetric data of n-th of water meter to be verified, V indicates the actual volume of normal volume container, n=1,
2 ..., N, N are water meter sum to be verified.
S10, error correction is carried out to the water meter to be verified that relative error is more than error threshold by computer control system.
In the embodiment of the present invention, relative error δnThere is sign, the upper limit of absolute value is error threshold, by be verified
The limits of error as defined in water meter class of accuracy and internal control reduction ratio determine, such as 2 grades of water meters are often limited to the error of flow point
2%, internal control reduction ratio takes 0.6, then the error threshold of the flow point is 1.2%.
Correction is sent by the water meter to be verified that two-way relative error is more than error threshold using computer control system to refer to
It enables, the microcontroller inside water meter to be verified makes response after receiving correction instruction, modifies internal correction table, and according to repairing
Correction table after changing is corrected the data of checking flow point, using linear interpolation correction method in two checking flow points
Between measurement result be corrected.
S11, the checkpoint volume data for verifying this repeat step S5 as the original volumetric data verified next time
~S10, until completing the verification to each checking flow point of each water meter to be verified.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from the other each of essence of the invention
The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.
Claims (7)
1. a kind of ultrasonic water meter calibration equipment, which is characterized in that including water storage constant pressure water supply system, automatically controlled water supply valve, water
Table installs stage body, flowmeter, automatically controlled throttle valve, normal volume container and automatically controlled Draw off valve；Water storage constant pressure water supply system
The water outlet of system is connect by water supply line with the water inlet of normal volume container, and is sequentially installed with electricity on the water supply line
Control water supply valve, water meter to be verified, flowmeter and automatically controlled throttle valve, the water meter to be verified are mounted on water pump composite stage body
On, the water inlet of the water storage constant pressure water supply system is connect by blow-off line with the water outlet of normal volume container, and described
Automatically controlled Draw off valve is installed on blow-off line.
2. ultrasonic water meter calibration equipment according to claim 1, which is characterized in that be arranged in the normal volume container
There is water level alarm.
3. ultrasonic water meter calibration equipment according to claim 2, which is characterized in that it further include computer control system,
The data collection terminal mouth of the computer control system is connect with flowmeter and water level alarm respectively, the computer control
The control output end mouthful of system is connect with automatically controlled throttle valve, automatically controlled water supply valve and automatically controlled Draw off valve respectively, the calculating
The bidirectional data communication interface of machine control system is connect with each water meter to be verified respectively.
4. a kind of ultrasonic water meter calibration method, which comprises the following steps:
S1, flow calibration is carried out to ultrasonic water meter calibration equipment, it is corresponding with automatically controlled throttle valve opening obtains checking flow point
Table；
S2, automatically controlled water supply valve and automatically controlled Draw off valve are opened by computer control system, and adjust electricity according to corresponding table
The common flow of throttle valve opening to water meter to be verified is controlled, the sky on water supply line and water supply line in each equipment runner is discharged
Gas；
S3, flow meter data is acquired by computer control system, and the flow for finely tuning water meter to be verified is recorded to setting range
Fine tuning ratio；
S4, automatically controlled water supply valve is closed by computer control system, after normal volume vessel empty, closes automatically controlled discharging valve
Door, records the original volumetric data of water meter to be verified；
S5, according to corresponding table and the flow of the automatically controlled throttle valve opening of proportion adjustment to checking flow point is finely tuned；
S6, automatically controlled water supply valve is opened by computer control system, when the water level alarm in normal volume container generates report
After alert signal, automatically controlled water supply valve is closed；
S7, it is no longer changed when the water of normal volume container, and after data of water meter to be verified is no longer changed, opens electricity
Control Draw off valve；
S8, after normal volume vessel empty, close automatically controlled Draw off valve, record the checkpoint volume data of water meter to be verified；
S9, the relative error that water meter to be verified is calculated according to original volumetric data and checkpoint volume data；
S10, error correction is carried out to the water meter to be verified that relative error is more than error threshold by computer control system；
S11, using this verification checkpoint volume data be used as the original volumetric data verified next time, repeatedly step S5~
S10, until completing the verification to each checking flow point of each water meter to be verified.
5. ultrasonic water meter calibration method according to claim 4, which is characterized in that the step S1 specifically:
By water pump composite to be verified on water pump composite stage body, measurement obtains the practical stream of each checking flow point of water meter to be verified
Amount, and the corresponding automatically controlled throttle valve opening of each checking flow point is recorded, generate checking flow point and automatically controlled throttle valve opening
Corresponding table, when replacing the specification of water meter to be verified every time, re-measures and generates checking flow point and automatically controlled throttle valve opening
Correspondence table.
6. ultrasonic water meter calibration method according to claim 4, which is characterized in that water meter to be verified in the step S9
Relative error calculation formula are as follows:
Wherein δnIndicate the relative error of n-th of water meter to be verified, Vn1Indicate the checkpoint volume number of n-th of water meter to be verified
According to Vn0Indicating the original volumetric data of n-th of water meter to be verified, V indicates the actual volume of normal volume container, n=1,
2 ..., N, N are water meter sum to be verified.
7. according to right ultrasonic water meter calibration method according to claim 4, which is characterized in that the step S10 tool
Body are as follows:
Correction instruction is sent by the water meter to be verified that two-way relative error is more than error threshold using computer control system, to
Microcontroller inside verification water meter makes response after receiving correction instruction, modifies internal correction table, and according to modification after
Correction table the data of checking flow point are corrected, using linear interpolation correction method between two checking flow points
Measurement result be corrected.
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| CN201910320963.2A CN110095169A (en) | 2019-04-21 | 2019-04-21 | A kind of ultrasonic water meter calibration equipment and method of calibration |
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Cited By (2)
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| CN112179458A (en) * | 2020-09-30 | 2021-01-05 | 湖南常德牌水表制造有限公司 | Full-automatic error correction calibrating device of electronic water meter |
| CN113049068A (en) * | 2021-03-15 | 2021-06-29 | 珠海旺远信息技术有限公司 | Calibration system and calibration method of ultrasonic metering device |
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| CN113049068A (en) * | 2021-03-15 | 2021-06-29 | 珠海旺远信息技术有限公司 | Calibration system and calibration method of ultrasonic metering device |
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Application publication date: 20190806 |