CN1301398C - Equal water quantity correcting and regulating method of telemetering water meter accuracy - Google Patents
Equal water quantity correcting and regulating method of telemetering water meter accuracy Download PDFInfo
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- CN1301398C CN1301398C CNB2005100417260A CN200510041726A CN1301398C CN 1301398 C CN1301398 C CN 1301398C CN B2005100417260 A CNB2005100417260 A CN B2005100417260A CN 200510041726 A CN200510041726 A CN 200510041726A CN 1301398 C CN1301398 C CN 1301398C
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Abstract
The present invention relates to an equal water quantity correcting and regulating method for telemetering water meter accuracy. In order to overcome the defect of low flow measuring accuracy existing in the prior art, the present invention divides the full flow quantity range of a telemetering water meter into a plurality of different flow quantities to be corrected, namely a plurality of flow quality operating conditions, and the and makes the number of turns implemented by blade wheels of the telemetering water meter for measuring and collecting the flow quantity operating conditions equal; the meter to be corrected and a standard meter makes synchronous measurement for all the flow quantity operating conditions, the flow measurement errors of the telemetering water meter are determined by f<k>=Qk<0>-beta/t<k> phi, and the accumulated quantity of water of users is determined by Z=*t<j> (beta/t<j> phi+f<j>). The present invention does not need to change the structure of the telemetering water meter, and can largely enhance the flow quantity measuring accuracy of the existing telemetering water meter by the correction of measured flow quantity and the compensation adjustment of accuracy, so that the accuracy of flow quantity measuring errors can be controlled within 0.5 percent.
Description
(1) technical field under:
The present invention relates to the instrument and meter fields of measurement, be a kind of remote transmitting water meter precision etc. water yield correcting and regulating method.
(2) background technology
Present widely used remote transmitting water meter is the mechanical type water meter, it comprises kinds such as rotary wind type, spiral type, and the sensor of measuring the water yield is wing impeller, is installed in the survey hydroecium of remote transmitting water meter and directly contacts with realization the measurement by water flow of pipeline with the pipeline current.The principle that wing impeller is measured the water yield is to utilize ducted flow dynamic, impacts wing impeller rotation, and method is by experiment known the coefficient of flow (commentaries on classics/m of wing impeller
3), promptly wing impeller rotating cycle with the relation by volumetric flow rate.At present, remote transmitting water meter nearly all is on the basis of existing mechanical type water meter, install the sensor of gathering wing impeller rotation information additional, as tongue tube sensor, hall effect sensor, inductance element, electrode sensor etc., realize that single-chip microcomputer is gathered out and be sent to the wing impeller rotation information of water meter to be handled and control, realize that collection, record, preservation and the information of water meter being measured the water yield transmit at a distance.
If water yield letter of water meter collection opens, time be t, then just can determine to flow through the water yield Z of water meter by the coefficient of flow of the wing impeller of water meter
In the formula, is the coefficient of flow (commentaries on classics/m of wing impeller
3), β
kRevolution for wing impeller in k t of water meter.
Existing remote transmitting water meter determines to flow through the water yield of water meter according to above-mentioned principle and formula (1).Though remote transmitting water meter can greatly alleviate the workload that artificial meter reading is chargeed, and has very high reliability.Yet the measuring accuracy of existing remote transmitting water meter is: promptly the flow measurement error from minimum flow to the flow of demarcating is 5% in the low discharge zone, is 2% from boundary flow to the flow measurement error of crossing current-carrying capacity promptly in middle and high flow region.This shows that the precision that existing remote transmitting water meter is measured the water yield is not high, can't reach desired 0.5% with interior measure of water error precision, this also is the existing deficiency of present remote transmitting water meter.Because remote transmitting water meter is built-in with the single-chip microcomputer of data processing, this provides potential engineering feasibility for improving the measuring accuracy of remote transmitting water meter.
Application number is that 02123596 patent of invention discloses a kind of " the measurement modification method of heat quantity flow and temperature ", in the method, for mechanical type heat quantity flow measuring accuracy is improved, proposed the flowmeter in each mechanical type calorimeter is demarcated, implement dynamically whole the correction, promptly treating that the flowmeter of school calorimeter and normal stream scale contrast at different characteristic flow point, calibrated coefficient of flow
#As the foundation of calculated flow rate,, calculate flow Z by flowmeter by the following formula of similar formula (1)
Z＝β/
# (2)
The advantage that this method has can be reduced calorimeter components and parts cost, improve mechanical type heat quantity flow measuring accuracy.But, invent the disclosed technical scheme from this, can't learn coefficient of flow
#Be how to obtain, and how use.
(3) summary of the invention
For overcoming the existing not high deficiency of the existing measure of water precision of remote transmitting water meter, the present invention proposes a kind of remote transmitting water meter precision etc. water yield correcting and regulating method.
The present invention is that the water yield is measured the basis with the coefficient of flow of remote transmitting water meter, with the standard of normal stream scale as correction telemetering water meter flow measuring error, synchronous flow experiments of measuring by with meter to be corrected and standard scale contrast obtains the error function that telemetering water meter flow is measured.Concrete grammar is: the flow gamut of remote transmitting water meter is divided into several different school flows for the treatment of, be several different flow operating modes, when carrying out correcting measuring, each flow operating mode all adopts the wing impeller of identical remote transmitting water meter school to transfer sample revolution β, writes down under each flow operating mode the wing impeller of remote transmitting water meter and finishes rotation β and change used time t
kWater yield school such as be and transfer sample.Meter to be corrected and standard scale carry out synchro measure to each flow operating mode, and pass through
Determine the flow measurement error of remote transmitting water meter.
In the formula, f
kBe remote transmitting water meter measuring error under the k flow operating mode in the flow gamut, Q
k 0Be the volumetric flow rate of normal stream scale under k flow operating mode, β is that the wing impeller of remote transmitting water meter school is transferred the sample revolution and each flow operating mode is all equated t
kBe the remote transmitting water meter time that wing impeller is finished the β revolution under k flow operating mode, is the coefficient of flow (commentaries on classics/m of remote transmitting water meter
3).
In the experiment of the correcting measuring of each flow operating mode,,, gather pairing time t because all finish after the rotation school transfers sample revolution β and change at the wing impeller of identical remote transmitting water meter although the flow of each flow operating mode is inequality
kEach flow operating mode is at t
kThe water yield by remote transmitting water meter in time equates.Obviously, different flow operating modes, its t
kBe different.
Corresponding different volumetric flow rates
Different f is just arranged
kBe worth corresponding, i.e. f
kBe
Function.This shows that the exact value of remote transmitting water meter volume flow measurement should be
After water yield method such as using the flow accuracy school of remote transmitting water meter is transferred, by
Determine user's accumulated water volume.In the formula, Z is that the user is at the inferior measure of water acquisition time of remote transmitting water meter experience m
After accumulated water volume, t
jBe the time that remote transmitting water meter wing impeller under j flow operating mode is finished rotation β revolution, f
jBe the measuring error of remote transmitting water meter under j flow operating mode, and at the f that is drawn
kInterpolation is chosen in the discrete function.
The remote transmitting water meter precision that the present invention proposes etc. water yield correcting and regulating method, overcome the not high deficiency of the existing flow measurement precision of existing remote transmitting water meter.Adopt remote transmitting water meter precision of the present invention etc. water yield correcting and regulating method, do not need to change the structure of remote transmitting water meter, only by correction and accuracy compensation adjustment to institute's measurement of discharge, the flow measurement precision of existing remote transmitting water meter is increased substantially, the flow measurement error precision is controlled within 0.5%.
(4) embodiment:
Embodiment one
Present embodiment is to utilize existing remote transmitting water meter check and corrective system, the normal stream scale is the series relationship on single tube road with treating the school remote transmitting water meter in check and corrective system, use the remote transmitting water meter precision etc. water yield correcting and regulating method, be that 15mm, flow gamut are 2m to nominal bore
3The telemetering water meter flow measuring accuracy of/h is carried out the school and is transferred.
Knownly treat that the coefficient of flow of the wing impeller of school remote transmitting water meter is 28000 commentaries on classics/m
3, the flow gamut for the treatment of the school remote transmitting water meter being divided into 40 treating school flow operating mode, these flow operating modes are Q
k 0, k=1,2,3 ..., 40, Q wherein
1 0Be the flow operating mode of minimum value, its value is 0.007m
3/ h, Q
40 0Be the flow operating mode of greatest measure, its value is 2m
3/ h.The school of the wing impeller of remote transmitting water meter is transferred sample revolution β and is defined as 50 commentaries on classics.Water tank and pipeline are full of water, electric control valve cut out, just can carry out correction experiment then the telemetering water meter flow measuring error by computer control.In proofreading and correct experimentation, computing machine is implemented the control to electric control valve always, by the aperture of by-pass valve control, and with the control of realization to discharge, and to normal stream scale and the flow data collector for the treatment of the school remote transmitting water meter.When the computing machine affirmation treated that school flow operating mode is treated in the flow operating mode arrival of school remote transmitting water meter, the computer control electric control valve made its valve opening be fixed up, and write down the time t that the wing impeller of remote transmitting water meter is finished the β revolution then under this operating mode
k, by
Determine the flow measurement error under this flow operating mode.In the formula, f
kBe remote transmitting water meter measuring error under the k flow operating mode in the flow gamut, Q
k 0Be the volumetric flow rate of normal stream scale under k flow operating mode, β is that the wing impeller of remote transmitting water meter school is transferred the sample revolution and each flow operating mode is all equated t
kBe the remote transmitting water meter time that wing impeller is finished the β revolution under k flow operating mode, is the coefficient of flow (commentaries on classics/m of remote transmitting water meter
3).
After finishing k the correction experiment under the flow operating mode, computing machine has just write down the flow measurement error f under this flow operating mode
k, computing machine is controlled the aperture variation that electric control valve makes its valve more then, enters into next flow operating mode.When the correction experiment of having finished whole flow operating modes, whole correction experiment also just comes to an end.At this moment, computing machine has been noted the flow measurement error of each flow operating mode.Proofread and correct and compensate according to these flow errors, treat that the flow measurement precision of school remote transmitting water meter just can increase substantially.After water yield method such as using the flow accuracy school of remote transmitting water meter is transferred, by
Determine user's accumulated water volume.In the formula, Z is that the user is at the inferior measure of water acquisition time of remote transmitting water meter experience m
After accumulated water volume, t
jBe the time that remote transmitting water meter wing impeller under j flow operating mode is finished rotation β revolution, f
jBe the measuring error of remote transmitting water meter under j flow operating mode, and at the f that is drawn
kInterpolation is chosen in the discrete function.
Embodiment two
Present embodiment is to utilize existing remote transmitting water meter check and corrective system, the normal stream scale is the series relationship on single tube road with treating the school remote transmitting water meter in check and corrective system, use the remote transmitting water meter precision etc. water yield correcting and regulating method, be that 20mm, flow gamut are 3m to nominal bore
3The telemetering water meter flow measuring accuracy of/h is carried out the school and is transferred.
Knownly treat that the coefficient of flow of the wing impeller of school remote transmitting water meter is 31000 commentaries on classics/m
3, the flow gamut for the treatment of the school remote transmitting water meter being divided into 55 treating school flow operating mode, these flow operating modes are Q
k 0, k=1,2,3 ..., 55, Q wherein
1 0Be the flow operating mode of minimum value, its value is 0.008m
3/ h, Q
55 0Be the flow operating mode of greatest measure, its value is 3m
3/ h.The school of the wing impeller of remote transmitting water meter is transferred sample revolution β and is defined as 54 commentaries on classics.Water tank and pipeline are full of water, electric control valve cut out, just can carry out correction experiment then the telemetering water meter flow measuring error by computer control.In proofreading and correct experimentation, computing machine is implemented the control to electric control valve always, by the aperture of by-pass valve control, and with the control of realization to discharge, and to normal stream scale and the flow data collector for the treatment of the school remote transmitting water meter.When the computing machine affirmation treated that school flow operating mode is treated in the flow operating mode arrival of school remote transmitting water meter, the computer control electric control valve made its valve opening be fixed up, and write down the time t that the wing impeller of remote transmitting water meter is finished the β revolution then under this operating mode
k, by
Determine the flow measurement error under this flow operating mode.In the formula, f
kBe remote transmitting water meter measuring error under the k flow operating mode in the flow gamut, Q
k 0Be the volumetric flow rate of normal stream scale under k flow operating mode, β is that the wing impeller of remote transmitting water meter school is transferred the sample revolution and each flow operating mode is all equated t
kBe the remote transmitting water meter time that wing impeller is finished the β revolution under k flow operating mode, is the coefficient of flow (commentaries on classics/m of remote transmitting water meter
3).
After finishing k the correction experiment under the flow operating mode, computing machine has just write down the flow measurement error f under this flow operating mode
k, computing machine is controlled the aperture variation that electric control valve makes its valve more then, enters into next flow operating mode.When the correction experiment of having finished whole flow operating modes, whole correction experiment also just comes to an end.At this moment, computing machine has been noted the flow measurement error of each flow operating mode.Proofread and correct and compensate according to these flow errors, treat that the flow measurement precision of school remote transmitting water meter just can increase substantially.After water yield method such as using the flow accuracy school of remote transmitting water meter is transferred, by
Determine user's accumulated water volume.In the formula, Z is that the user is at the inferior measure of water acquisition time of remote transmitting water meter experience m
After accumulated water volume, t
jBe the time that remote transmitting water meter wing impeller under j flow operating mode is finished rotation β revolution, f
jBe the measuring error of remote transmitting water meter under j flow operating mode, and at the f that is drawn
kInterpolation is chosen in the discrete function.
Embodiment three
Present embodiment is to utilize existing remote transmitting water meter check and corrective system, the normal stream scale is the series relationship on single tube road with treating the school remote transmitting water meter in check and corrective system, use the remote transmitting water meter precision etc. water yield correcting and regulating method, be that 25mm, flow gamut are 4m to nominal bore
3The telemetering water meter flow measuring accuracy of/h is carried out the school and is transferred.
Knownly treat that the coefficient of flow of the wing impeller of school remote transmitting water meter is 32000 commentaries on classics/m
3, the flow gamut for the treatment of the school remote transmitting water meter being divided into 66 treating school flow operating mode, these flow operating modes are Q
k 0, k=1,2,3 ..., 66, Q wherein
1 0Be the flow operating mode of minimum value, its value is 0.01m
3/ h, Q
66 0Be the flow operating mode of greatest measure, its value is 4m
3/ h.The school of the wing impeller of remote transmitting water meter is transferred sample revolution β and is defined as 62 commentaries on classics.Water tank and pipeline are full of water, electric control valve cut out, just can carry out correction experiment then the telemetering water meter flow measuring error by computer control.In proofreading and correct experimentation, computing machine is implemented the control to electric control valve always, by the aperture of by-pass valve control, and with the control of realization to discharge, and to normal stream scale and the flow data collector for the treatment of the school remote transmitting water meter.When the computing machine affirmation treated that school flow operating mode is treated in the flow operating mode arrival of school remote transmitting water meter, the computer control electric control valve made its valve opening be fixed up, and write down the time t that the wing impeller of remote transmitting water meter is finished the β revolution then under this operating mode
k, by
Determine the flow measurement error under this flow operating mode.In the formula, f
kBe remote transmitting water meter measuring error under the k flow operating mode in the flow gamut, Q
k 0Be the volumetric flow rate of normal stream scale under k flow operating mode, β is that the wing impeller of remote transmitting water meter school is transferred the sample revolution and each flow operating mode is all equated t
kBe the remote transmitting water meter time that wing impeller is finished the β revolution under k flow operating mode, is the coefficient of flow (commentaries on classics/m of remote transmitting water meter
3).
After finishing k the correction experiment under the flow operating mode, computing machine has just write down the flow measurement error f under this flow operating mode
k, computing machine is controlled the aperture variation that electric control valve makes its valve more then, enters into next flow operating mode.When the correction experiment of having finished whole flow operating modes, whole correction experiment also just comes to an end.At this moment, computing machine has been noted the flow measurement error of each flow operating mode.Proofread and correct and compensate according to these flow errors, treat that the flow measurement precision of school remote transmitting water meter just can increase substantially.After water yield method such as using the flow accuracy school of remote transmitting water meter is transferred, by
Determine user's accumulated water volume.In the formula, Z is that the user is at the inferior measure of water acquisition time of remote transmitting water meter experience m
After accumulated water volume, t
jBe the time that remote transmitting water meter wing impeller under j flow operating mode is finished rotation β revolution, f
jBe the measuring error of remote transmitting water meter under j flow operating mode, and at the f that is drawn
kInterpolation is chosen in the discrete function.
Claims (2)
- A remote transmitting water meter precision etc. water yield correcting and regulating method, coefficient of flow with remote transmitting water meter is that the water yield is measured the basis, with the standard of normal stream scale as correction telemetering water meter flow measuring error, it is characterized in that: the flow gamut of remote transmitting water meter is divided into several different school flow operating modes for the treatment of, when carrying out correcting measuring, each flow operating mode all adopts the wing impeller of identical remote transmitting water meter school to transfer sample revolution β, writes down under each flow operating mode the wing impeller rotation of water meter β and changes used time t k, make meter to be corrected and standard scale carry out synchro measure, and pass through each flow operating modeDetermine the flow measurement error of remote transmitting water meter;
In the formula, f kBe remote transmitting water meter measuring error under the k flow operating mode in the flow gamut, Q k 0Be the volumetric flow rate of normal stream scale under k flow operating mode, β is that the wing impeller of remote transmitting water meter school is transferred the sample revolution and each flow operating mode is all equated t kBe the remote transmitting water meter time that wing impeller is finished the β revolution under k flow operating mode, is the coefficient of flow commentaries on classics/m of remote transmitting water meter 2 - 2. remote transmitting water meter precision as claimed in claim 1 etc. water yield correcting and regulating method, it is characterized in that: byDetermine user's accumulated water volume;
In the formula, Z is that the user is at the inferior measure of water acquisition time of remote transmitting water meter experience m
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100417260A CN1301398C (en) | 2005-02-25 | 2005-02-25 | Equal water quantity correcting and regulating method of telemetering water meter accuracy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100417260A CN1301398C (en) | 2005-02-25 | 2005-02-25 | Equal water quantity correcting and regulating method of telemetering water meter accuracy |
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| CN1301398C true CN1301398C (en) | 2007-02-21 |
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| CNB2005100417260A Expired - Fee Related CN1301398C (en) | 2005-02-25 | 2005-02-25 | Equal water quantity correcting and regulating method of telemetering water meter accuracy |
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| CN102538914B (en) * | 2011-12-26 | 2014-12-17 | 宁波水表股份有限公司 | Electronic water meter with correction function |
| CN103852114A (en) * | 2013-04-24 | 2014-06-11 | 洛阳神佳窑业有限公司 | Flowmeter capable of being calibrated on line |
| CN107818395B (en) * | 2017-09-05 | 2022-04-22 | 天津市电力科技发展有限公司 | Electric energy meter error iterative calculation method based on measurement uncertainty |
| CN107657083A (en) * | 2017-09-05 | 2018-02-02 | 天津市电力科技发展有限公司 | A kind of intellectual water meter is in Line synthesis error calibration method |
| CN110319900B (en) * | 2019-04-26 | 2021-09-07 | 珠海格力电器股份有限公司 | Method and device for determining water consumption of washing machine, storage medium and washing machine |
| CN111998918B (en) * | 2019-05-27 | 2023-04-25 | 深圳电蚂蚁数据技术有限公司 | Error correction method, error correction device and flow sensing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85205330U (en) * | 1985-12-09 | 1987-01-14 | 武汉市自动化研究所 | Plug-type ultrasonic flowmeter |
| CN1235671A (en) * | 1996-09-02 | 1999-11-17 | 萨尔茨科滕加油设备股份有限公司 | Method and device for measuring volumetric flow of fluid |
| JP2002303544A (en) * | 2001-04-06 | 2002-10-18 | Tokyo Gas Co Ltd | Method of calculating initial value of pulse constant of fluidic gas meter, and fluidic gas meter |
| JP2003028680A (en) * | 2001-07-11 | 2003-01-29 | Tokyo Gas Co Ltd | Flow rate measurement method and apparatus, and gas meter |
| CN1465965A (en) * | 2002-07-05 | 2004-01-07 | 北京鸿豪兴达仪表有限公司 | Heat quantity flow and temp. metering correcting method |
-
2005
- 2005-02-25 CN CNB2005100417260A patent/CN1301398C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85205330U (en) * | 1985-12-09 | 1987-01-14 | 武汉市自动化研究所 | Plug-type ultrasonic flowmeter |
| CN1235671A (en) * | 1996-09-02 | 1999-11-17 | 萨尔茨科滕加油设备股份有限公司 | Method and device for measuring volumetric flow of fluid |
| JP2002303544A (en) * | 2001-04-06 | 2002-10-18 | Tokyo Gas Co Ltd | Method of calculating initial value of pulse constant of fluidic gas meter, and fluidic gas meter |
| JP2003028680A (en) * | 2001-07-11 | 2003-01-29 | Tokyo Gas Co Ltd | Flow rate measurement method and apparatus, and gas meter |
| CN1465965A (en) * | 2002-07-05 | 2004-01-07 | 北京鸿豪兴达仪表有限公司 | Heat quantity flow and temp. metering correcting method |
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