CN114485863A - Flow error correction method, system, computer and medium for ultrasonic water meter - Google Patents
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Abstract
The invention discloses a flow error correction method of an ultrasonic water meter, which comprises the following steps: dividing the measuring range of the ultrasonic water meter into a plurality of preset measuring range intervals; respectively constructing an initial ratio coefficient calculation model according to each preset range interval; testing the ultrasonic water meter to obtain test data, inputting the test data into the comparison coefficient calculation model, and further obtaining a final comparison coefficient calculation model; calculating the line average flow velocity of the ultrasonic water meter according to a preset line average flow velocity model of the ultrasonic water meter; and constructing an ultrasonic surface average flow velocity model according to the final comparison coefficient calculation model, and inputting the linear average flow velocity into a preset ultrasonic surface average flow velocity model to obtain the surface average flow velocity of the ultrasonic water meter. The invention also discloses a flow error correction system of the ultrasonic water meter, computer equipment and a readable storage medium. By adopting the invention, the error problem of the existing ultrasonic water meter can be solved, and the measurement precision of the ultrasonic water meter is improved.
Description
Technical Field
The invention relates to the field of temperature measurement, in particular to a flow error correction method, a flow error correction system, a flow error correction computer and a flow error correction medium for an ultrasonic water meter.
Background
In recent years, in order to advocate the concept of saving water resources and control the artificial waste of water resources, the state usually installs a tap water meter on the water inlet pipeline of each household, an ultrasonic water meter is a novel water meter which further calculates the flow of water by detecting the time difference generated by the change of the speed when an ultrasonic sound beam propagates in water in a forward and reverse flow manner and analyzing and processing the time difference to obtain the flow rate of the water, and the novel water meter has excellent small-flow detection capability, can solve the problems of a plurality of traditional water meters, is more suitable for the gradient charging of water charges, is more suitable for the saving and reasonable utilization of water resources, and has wide market and application prospects.
In the full flow range of the ultrasonic water meter, the corresponding relation between the linear average flow velocity and the surface average flow velocity cannot be subjected to fitting calibration by adopting a linear equation, so that errors are caused, and the measurement precision of the ultrasonic water meter is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a flow error correction method, a flow error correction system, a flow error correction computer and a flow error correction medium for an ultrasonic water meter, which can solve the error problem of the existing ultrasonic water meter and improve the measurement precision of the ultrasonic water meter.
In order to solve the technical problem, the invention provides a flow error correction method of an ultrasonic water meter, which comprises the following steps: dividing the measuring range of the ultrasonic water meter into a plurality of preset measuring range intervals; respectively constructing an initial ratio coefficient calculation model according to each preset range interval; testing the ultrasonic water meter to obtain test data, inputting the test data into the comparison coefficient calculation model, and further obtaining a final comparison coefficient calculation model to correct the flow error of the ultrasonic water meter; calculating the line average flow velocity of the ultrasonic water meter according to a preset line average flow velocity model of the ultrasonic water meter; constructing an ultrasonic surface average flow velocity model according to the final comparison coefficient calculation model, and inputting the linear average flow velocity into a preset ultrasonic surface average flow velocity model to obtain the surface average flow velocity of the ultrasonic water meter;
and calculating the flow of the ultrasonic water meter according to the surface average flow velocity of the ultrasonic water meter.
Preferably, the column coefficient calculation model is: k is aQ + b, wherein k is a proportionality coefficient, Q is the flow of the ultrasonic water meter, a is a first proportionality parameter, and b is a second proportionality parameter.
Preferably, the ultrasonic water meter line average flow velocity model is:
wherein, VlThe linear average flow speed of the ultrasonic water meter is shown, h is the distance between a sensor and a reflecting surface of the ultrasonic water meter, L is the distance between the two reflecting surfaces of the ultrasonic water meter, Delta tau is the time difference between the forward flow and the reverse flow of the ultrasonic wave, and tau is the average time of the forward flow and the reverse flow of the ultrasonic wave.
Preferably, the ultrasonic surface average flow velocity model is: vs＝k*VlWherein V islIs the line average flow velocity, V, of the ultrasonic water metersAnd k is a proportionality coefficient, and is the surface average flow velocity of the ultrasonic water meter.
Preferably, the range of the ultrasonic water meter is divided into a plurality of preset range intervals, wherein the number range of the preset range intervals is 2-10.
Preferably, the number of the preset range intervals is 5.
The invention also provides a flow error correction system of the ultrasonic water meter, which is used for realizing the flow error correction method of any ultrasonic water meter, and comprises the following steps: the range division module is used for dividing the range of the ultrasonic water meter into a plurality of preset range intervals; the comparison coefficient calculation model building module is used for building an initial comparison coefficient calculation model according to each preset range interval; the comparison coefficient calculation module is used for testing the ultrasonic water meter to obtain test data, inputting the test data into the comparison coefficient calculation model, and further obtaining a final comparison coefficient calculation model so as to correct the flow error of the ultrasonic water meter; the linear average flow velocity calculation module is used for calculating the linear average flow velocity of the ultrasonic water meter according to a preset linear average flow velocity model of the ultrasonic water meter; the surface average flow velocity calculation module is used for constructing an ultrasonic surface average flow velocity model according to the final comparison coefficient calculation model and inputting the linear average flow velocity into a preset ultrasonic surface average flow velocity model so as to obtain the surface average flow velocity of the ultrasonic water meter; and the flow calculation module is used for calculating the flow of the ultrasonic water meter according to the surface average flow velocity of the ultrasonic water meter.
Preferably, the column coefficient calculation model is: k is aQ + b, wherein k is a proportionality coefficient, Q is the flow of the ultrasonic water meter, a is a first proportionality parameter, and b is a second proportionality parameter;
the ultrasonic water meter line average flow velocity model is as follows:
wherein, VlThe linear average flow speed of the ultrasonic water meter is shown, h is the distance between a sensor and a reflecting surface of the ultrasonic water meter, L is the distance between the two reflecting surfaces of the ultrasonic water meter, delta tau is the time difference between ultrasonic downstream and ultrasonic upstream, and tau is the average time of the ultrasonic downstream and ultrasonic upstream;
the ultrasonic surface average flow velocity model is as follows: vs＝k*VlWherein V islIs the line average flow velocity, V, of the ultrasonic water metersAnd k is a proportionality coefficient, wherein k is the surface average flow velocity of the ultrasonic water meter.
The invention also provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the above methods when executing the computer program.
The invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the above-described methods.
The beneficial effects of the implementation of the invention are as follows:
the invention provides a flow error correction method, a flow error correction system, a computer device and a readable storage medium of an ultrasonic water meter, the measuring range of the ultrasonic water meter is divided into a plurality of preset measuring range intervals, and an initial ratio coefficient calculation model is respectively constructed according to each preset measuring range interval, further testing the ultrasonic water meter to obtain test data, inputting the test data into the comparison coefficient calculation model, further obtaining a final comparison coefficient calculation model, calculating the linear average flow velocity of the ultrasonic water meter according to a preset linear average flow velocity model of the ultrasonic water meter, constructing an ultrasonic wave surface average flow velocity model according to the final comparison coefficient calculation model, inputting the linear average flow velocity into a preset ultrasonic wave surface average flow velocity model, and finally, calculating the flow of the ultrasonic water meter according to the surface average flow velocity of the ultrasonic water meter. By adopting the invention, the error problem of the existing ultrasonic water meter can be solved, and the measurement precision of the ultrasonic water meter is improved.
Drawings
Fig. 1 is a flow chart of a flow error correction method of an ultrasonic water meter according to the present invention;
FIG. 2 is a schematic view of a flow error correction system for an ultrasonic water meter according to the present invention;
FIG. 3 is a schematic view of the measuring principle of the ultrasonic water meter provided by the present invention;
fig. 4 is a graph of k values provided by the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the invention is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the invention.
As shown in fig. 1, the present invention provides a method for correcting a flow error of an ultrasonic water meter, including:
s101, dividing the range of the ultrasonic water meter into a plurality of preset range intervals;
s102, respectively constructing an initial ratio coefficient calculation model according to each preset range interval;
s103, testing the ultrasonic water meter to obtain test data, inputting the test data into the comparison coefficient calculation model to further obtain a final comparison coefficient calculation model, and correcting the flow error of the ultrasonic water meter;
s104, calculating the line average flow speed of the ultrasonic water meter according to a preset line average flow speed model of the ultrasonic water meter;
s105, constructing an ultrasonic surface average flow velocity model according to the final comparison coefficient calculation model, and inputting the linear average flow velocity into a preset ultrasonic surface average flow velocity model to obtain the surface average flow velocity of the ultrasonic water meter;
and S106, calculating the flow of the ultrasonic water meter according to the surface average flow velocity of the ultrasonic water meter.
It should be noted that, in the full flow rate range of the ultrasonic water meter, the corresponding relationship between the linear average flow rate and the surface average flow rate cannot be calibrated by fitting a linear equation, and the method provides a method for correcting the sectional flow rate measurement on the basis of tests and researches, so that the measurement accuracy is obviously improved.
The method comprises the steps of dividing the range of the ultrasonic water meter into a plurality of preset range intervals, respectively constructing an initial comparison coefficient calculation model according to each preset range interval, further testing the ultrasonic water meter to obtain test data, inputting the test data into the comparison coefficient calculation model to further obtain a final comparison coefficient calculation model, calculating the linear average flow velocity of the ultrasonic water meter according to the preset linear average flow velocity model of the ultrasonic water meter, constructing an ultrasonic surface average flow velocity model according to the final comparison coefficient calculation model, inputting the linear average flow velocity into the preset ultrasonic surface average flow velocity model to obtain the surface average flow velocity of the ultrasonic water meter, and finally calculating the flow of the ultrasonic water meter according to the surface average flow velocity of the ultrasonic water meter. By adopting the invention, the error problem of the existing ultrasonic water meter can be solved, and the measurement precision of the ultrasonic water meter is improved.
Preferably, the ultrasonic water meter line average flow velocity model is:
wherein, VlThe linear average flow velocity of the ultrasonic water meter is obtained, h is the distance between a sensor and a reflecting surface of the ultrasonic water meter, L is the distance between the two reflecting surfaces of the ultrasonic water meter, delta tau is the time difference between ultrasonic downstream and ultrasonic upstream, and tau is the average time of the ultrasonic downstream and ultrasonic upstream.
It should be noted that, in this embodiment, as shown in fig. 3, the method described herein is provided on the basis of measuring the linear flow velocity of the ultrasonic water meter by using the time difference method principle, and in the calculation formula of the average flow velocity Vl of the ultrasonic water meter, the influence of the ultrasonic propagation velocity C0 is eliminated.
Preferably, the ultrasonic surface average flow velocity model is: vs＝k*VlWherein V islIs the line average flow velocity, V, of the ultrasonic water metersAnd k is a proportionality coefficient, wherein k is the surface average flow velocity of the ultrasonic water meter. Further, preferably, the column coefficient calculation model is: k is aQ + b, wherein k is a proportionality coefficient, Q is the flow of the ultrasonic water meter, a is a first proportionality parameter, and b is a second proportionality parameter.
In this embodiment, the surface average flow velocity V is used for the ultrasonic flow measurementsThe surface average flow velocity and the linear average flow velocity have the following relationship Vs＝k*VlThe k values in different flow speed ranges are different, the k coefficients are in different flow intervals, the rough curve is shown in fig. 4, the k values in the large flow intervals are stable, the curve can be fitted into a straight line, the k values in the small flow intervals are steep, the curve cannot be simply fitted, and the curve needs to be divided into a plurality of sections.
Preferably, the range of the ultrasonic water meter is divided into a plurality of preset range intervals, wherein the number of the preset range intervals ranges from 2 to 10. Preferably, the number of the preset range intervals is 5.
In this example, experimental tests were performed: the full range is divided into 5 intervals. (0, Q1], (Q1, Q2], (Q2, Q01], (Q01, Q3], (Q3, Q4.) each segment of myopia k-values are fitted to the equation of a straight line y-Ax + B.
And testing the water meter prototype on calibration equipment to obtain a large amount of experimental data, determining the values of the parameter A and the parameter B in each section of linear equation according to the experimental data, and prefabricating the parameter A and the parameter B of each section of linear equation obtained through the experiment in a water meter program. Because the linear equation parameters are prefabricated, the error of each ultrasonic water meter when leaving the factory is not greatly different from the error of the standard meter of the calibration equipment. However, since the hardware and circuit of each ultrasonic water meter are different, there will be some error from the standard meter. Therefore, each ultrasonic water meter needs to be calibrated when leaving the factory, and the values of the parameter A and the parameter B in each section of linear equation are corrected, so that the error of each water meter meets the standard.
As shown in fig. 2, the present invention further provides a flow error correction system 100 for an ultrasonic water meter, which is used to implement any one of the flow error correction methods for an ultrasonic water meter, and includes: the measuring range dividing module 1 is used for dividing the measuring range of the ultrasonic water meter into a plurality of preset measuring range intervals; the comparison coefficient calculation model building module 2 is used for building an initial comparison coefficient calculation model according to each preset range interval; the comparison coefficient calculation module 3 is used for testing the ultrasonic water meter to obtain test data, inputting the test data into the comparison coefficient calculation model and further obtaining a final comparison coefficient calculation model; the linear average flow velocity calculation module 4 is used for calculating the linear average flow velocity of the ultrasonic water meter according to a preset linear average flow velocity model of the ultrasonic water meter; the surface average flow velocity calculation module 5 is used for constructing an ultrasonic surface average flow velocity model according to the final comparison coefficient calculation model and inputting the linear average flow velocity into a preset ultrasonic surface average flow velocity model to obtain the surface average flow velocity of the ultrasonic water meter; and the flow calculation module 6 is used for calculating the flow of the ultrasonic water meter according to the surface average flow velocity of the ultrasonic water meter.
It should be noted that, in the full flow velocity range of the ultrasonic water meter, the corresponding relationship between the linear average flow velocity and the surface average flow velocity cannot be fitted and calibrated by using a linear equation, and the method provides a method for correcting the sectional flow measurement on the basis of tests and researches, so that the measurement accuracy is obviously improved.
According to the invention, the range of the ultrasonic water meter is divided into a plurality of preset range intervals by the range dividing module 1; establishing an initial ratio coefficient calculation model according to each preset range interval through the ratio coefficient calculation model establishing module 2; testing the ultrasonic water meter through the comparison coefficient calculation module 3 to obtain test data, inputting the test data into the comparison coefficient calculation model, and further obtaining a final comparison coefficient calculation model to correct the flow error of the ultrasonic water meter; calculating the line average flow velocity of the ultrasonic water meter according to a preset line average flow velocity model of the ultrasonic water meter through the line average flow velocity calculation module 4; constructing an ultrasonic surface average flow velocity model according to the final comparison coefficient calculation model through the surface average flow velocity calculation module 5, and inputting the linear average flow velocity into a preset ultrasonic surface average flow velocity model to obtain the surface average flow velocity of the ultrasonic water meter; and calculating the flow of the ultrasonic water meter according to the surface average flow velocity of the ultrasonic water meter by the flow calculation module 6. By adopting the invention, the error problem of the existing ultrasonic water meter can be solved, and the measurement precision of the ultrasonic water meter is improved.
Preferably, the column coefficient calculation model is: k is aQ + b, wherein k is a proportionality coefficient, Q is the flow of the ultrasonic water meter, a is a first proportionality parameter, and b is a second proportionality parameter;
the ultrasonic water meter line average flow velocity model is as follows:
wherein, VlThe linear average flow speed of the ultrasonic water meter is shown, h is the distance between a sensor and a reflecting surface of the ultrasonic water meter, L is the distance between the two reflecting surfaces of the ultrasonic water meter, delta tau is the time difference between ultrasonic downstream and ultrasonic upstream, and tau is the average time of the ultrasonic downstream and ultrasonic upstream;
as shown in fig. 3, the method described herein is based on the measurement of the line flow rate of the ultrasonic water meter by using the time difference method, and the influence of the ultrasonic propagation speed C0 is eliminated in the calculation formula of the average flow rate Vl of the ultrasonic water meter.
The ultrasonic surface average flow velocity model is as follows: vs＝k*VlWherein V islIs the line average flow velocity, V, of the ultrasonic water metersAnd k is a proportionality coefficient, wherein k is the surface average flow velocity of the ultrasonic water meter.
The ultrasonic flow measurement adopts the surface average flow velocity VsThe surface average flow velocity and the linear average flow velocity have the following relationship Vs＝k*VlThe k values in different flow speed ranges are different, the k coefficients are in different flow intervals, the rough curve is shown in fig. 4, the k values in the large flow intervals are stable, the curve can be fitted into a straight line, the k values in the small flow intervals are steep, the curve cannot be simply fitted, and the curve needs to be divided into a plurality of sections.
In this example, experimental tests were performed: the full range is divided into 5 intervals. (0, Q1], (Q1, Q2], (Q2, Q01], (Q01, Q3], (Q3, Q4.) each segment of myopia k-values are fitted to the equation of a straight line y-Ax + B.
And testing the water meter prototype on calibration equipment to obtain a large amount of experimental data, determining the values of the parameter A and the parameter B in each section of linear equation according to the experimental data, and prefabricating the parameter A and the parameter B of each section of linear equation obtained through the experiment in a water meter program. Because the linear equation parameters are prefabricated, the error of each ultrasonic water meter when leaving the factory is not greatly different from the error of the standard meter of the calibration equipment. However, since the hardware and circuit of each ultrasonic water meter are different, there will be some error from the standard meter. Therefore, each ultrasonic water meter needs to be calibrated when leaving the factory, and the values of the parameter A and the parameter B in each section of linear equation are corrected, so that the error of each water meter meets the standard.
The invention also provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the above methods when executing the computer program.
The invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the above-described methods.
In summary, the present invention specifically describes:
(1) the method is provided on the basis of measuring the linear flow velocity of the ultrasonic water meter by adopting the time difference method principle, as shown in figure 3, the average flow velocity V of the ultrasonic water meter islThe influence of the ultrasonic wave propagation speed C0 is eliminated in the calculation formula (2), and the final formula is as follows:
wherein, VlThe linear average flow speed of the ultrasonic water meter is shown, h is the distance between a sensor and a reflecting surface of the ultrasonic water meter, L is the distance between the two reflecting surfaces of the ultrasonic water meter, Delta tau is the time difference between the forward flow and the reverse flow of the ultrasonic wave, and tau is the average time of the forward flow and the reverse flow of the ultrasonic wave.
(2) The ultrasonic flow measurement adopts the surface average flow velocity VsThe surface average flow velocity and the linear average flow velocity have the following relationship Vs＝k*VlThe k values in different flow speed ranges are different, the k coefficients are in different flow intervals, the rough curve is shown in fig. 4, the k values in the large flow intervals are stable, the curve can be fitted into a straight line, the k values in the small flow intervals are steep, the curve cannot be simply fitted, and the curve needs to be divided into a plurality of sections.
(3) Through experimental tests: the full range is divided into 5 intervals. (0, Q1], (Q1, Q2], (Q2, Q01], (Q01, Q3], (Q3, Q4.) each segment of myopia k-values are fitted to the equation of a straight line y-Ax + B.
(4) The water meter prototype is tested on calibration equipment, a large amount of experimental data are obtained, the values of the parameter A and the parameter B in each section of linear equation are determined according to the experimental data, and the parameter A and the parameter B of each section of linear equation obtained through experiments are prefabricated in a water meter program. Because the linear equation parameters are prefabricated, the error of each ultrasonic water meter when leaving the factory is not greatly different from the error of the standard meter of the calibration equipment. However, since the hardware and circuit of each ultrasonic water meter are different, there will be some error from the standard meter. Therefore, each ultrasonic water meter needs to be calibrated when leaving the factory, and the values of the parameter A and the parameter B in each section of linear equation are corrected, so that the error of each water meter meets the standard.
(5) The method is different from some calibration methods in the industry in that the flow calibration segmentation points are different and the segmentation interval number is different. The number of the sectional points and the sectional intervals of the method can further submit the measurement precision of the ultrasonic water meter in the full range. In the full flow range of the ultrasonic water meter, the corresponding relation between the linear average flow velocity and the surface average flow velocity cannot be subjected to fitting calibration by adopting a linear equation. The error correction method comprises the following steps: according to a curve equation between the full-range linear average flow velocity and the surface average flow velocity measured by experiments, the full-range of the flow velocity is divided into 5 regions which can be fitted by straight lines, and each region is corrected by adopting a fitted straight line equation, so that errors of all flow points can meet the error requirement. Experiments prove that the method can meet the error standard of the water meter.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A flow error correction method of an ultrasonic water meter is characterized by comprising the following steps:
dividing the measuring range of the ultrasonic water meter into a plurality of preset measuring range intervals;
respectively constructing an initial ratio coefficient calculation model according to each preset range interval;
testing the ultrasonic water meter to obtain test data, inputting the test data into the comparison coefficient calculation model, and further obtaining a final comparison coefficient calculation model to correct the flow error of the ultrasonic water meter;
calculating the line average flow velocity of the ultrasonic water meter according to a preset line average flow velocity model of the ultrasonic water meter;
constructing an ultrasonic surface average flow velocity model according to the final comparison coefficient calculation model, and inputting the linear average flow velocity into a preset ultrasonic surface average flow velocity model to obtain the surface average flow velocity of the ultrasonic water meter;
and calculating the flow of the ultrasonic water meter according to the surface average flow velocity of the ultrasonic water meter.
2. The flow error correction method for an ultrasonic water meter as set forth in claim 1, wherein said coefficient of ratio calculation model is: k is equal to aQ + b,
and k is a proportionality coefficient, Q is the flow of the ultrasonic water meter, a is a first proportionality parameter, and b is a second proportionality parameter.
3. The method for correcting flow error of an ultrasonic water meter according to claim 1, wherein the mean flow velocity model of the ultrasonic water meter line is:
wherein, VlThe linear average flow speed of the ultrasonic water meter is shown, h is the distance between a sensor and a reflecting surface of the ultrasonic water meter, L is the distance between the two reflecting surfaces of the ultrasonic water meter, Delta tau is the time difference between the forward flow and the reverse flow of the ultrasonic wave, and tau is the average time of the forward flow and the reverse flow of the ultrasonic wave.
4. The method of calibrating flow error in an ultrasonic water meter as set forth in claim 1, wherein said ultrasonic surface average flow velocity model is: vs＝k*Vl
Wherein, VlIs the line average flow velocity, V, of the ultrasonic water metersAnd k is a proportionality coefficient, wherein k is the surface average flow velocity of the ultrasonic water meter.
5. The method of calibrating flow rate errors in an ultrasonic water meter as set forth in claim 1, wherein the range of the ultrasonic water meter is divided into a plurality of preset range sections, and wherein the number of the preset range sections is in the range of 2 to 10.
6. The flow error correction method of an ultrasonic water meter as set forth in claim 5, wherein the number of said preset range intervals is 5.
7. A flow error correction system of an ultrasonic water meter, which is used for realizing the flow error correction method of the ultrasonic water meter according to any one of claims 1 to 6, and comprises the following steps:
the range division module is used for dividing the range of the ultrasonic water meter into a plurality of preset range intervals;
the comparison coefficient calculation model building module is used for building an initial comparison coefficient calculation model according to each preset range interval;
the comparison coefficient calculation module is used for testing the ultrasonic water meter to obtain test data, inputting the test data into the comparison coefficient calculation model, and further obtaining a final comparison coefficient calculation model so as to correct the flow error of the ultrasonic water meter;
the linear average flow velocity calculation module is used for calculating the linear average flow velocity of the ultrasonic water meter according to a preset linear average flow velocity model of the ultrasonic water meter;
the surface average flow velocity calculation module is used for constructing an ultrasonic surface average flow velocity model according to the final comparison coefficient calculation model and inputting the linear average flow velocity into a preset ultrasonic surface average flow velocity model so as to obtain the surface average flow velocity of the ultrasonic water meter;
and the flow calculation module is used for calculating the flow of the ultrasonic water meter according to the surface average flow velocity of the ultrasonic water meter.
8. The flow error correction system for an ultrasonic water meter as set forth in claim 7,
the calculation model of the column ratio coefficient is as follows: k is defined as aQ + b,
wherein k is a proportionality coefficient, Q is the flow of the ultrasonic water meter, a is a first proportionality parameter, and b is a second proportionality parameter;
the ultrasonic water meter line average flow velocity model is as follows:
wherein, VlThe linear average flow speed of the ultrasonic water meter is shown, h is the distance between a sensor and a reflecting surface of the ultrasonic water meter, L is the distance between the two reflecting surfaces of the ultrasonic water meter, delta tau is the time difference between ultrasonic downstream and ultrasonic upstream, and tau is the average time of the ultrasonic downstream and ultrasonic upstream;
the ultrasonic surface average flow velocity model is as follows: vs＝k*Vl
Wherein, VlIs the line average flow velocity, V, of the ultrasonic water metersAnd k is a proportionality coefficient, wherein k is the surface average flow velocity of the ultrasonic water meter.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method of any of claims 1 to 6 are implemented when the computer program is executed by the processor.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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| CN116147741A (en) * | 2023-01-12 | 2023-05-23 | 宁夏隆基宁光仪表股份有限公司 | NB-IoT based ultrasonic water meter flow calibration method and system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538913A (en) * | 2011-12-26 | 2012-07-04 | 宁波水表股份有限公司 | Correction method of flow measurement properties of single-track ultrasonic water meter |
| JP2013024646A (en) * | 2011-07-19 | 2013-02-04 | Hitachi-Ge Nuclear Energy Ltd | Ultrasonic flow meter and flow measurement method using the same |
| JP2013178127A (en) * | 2012-02-28 | 2013-09-09 | Azbil Corp | Ultrasonic flow meter and ultrasonic calorimeter |
| CN103913202A (en) * | 2014-04-14 | 2014-07-09 | 姜跃炜 | Ultrasonic water meter interception coefficient processing method |
| US20140371594A1 (en) * | 2011-10-19 | 2014-12-18 | Verasonics, Inc. | Estimation and display for vector doppler imaging using plane wave transmissions |
| CN105222839A (en) * | 2015-08-21 | 2016-01-06 | 宁波市鹏盛科技发展有限公司 | The Nonlinearity Correction Method of ultrasonic flow meter instrument coefficient |
| CN113514117A (en) * | 2021-06-09 | 2021-10-19 | 宁波水表(集团)股份有限公司 | Design method of ultrasonic water meter flow channel |
| CN113607245A (en) * | 2021-07-09 | 2021-11-05 | 浙江工业大学 | Self-adaptive flow compensation method for ultrasonic water meter |
-
2021
- 2021-12-24 CN CN202111601455.5A patent/CN114485863A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013024646A (en) * | 2011-07-19 | 2013-02-04 | Hitachi-Ge Nuclear Energy Ltd | Ultrasonic flow meter and flow measurement method using the same |
| US20140371594A1 (en) * | 2011-10-19 | 2014-12-18 | Verasonics, Inc. | Estimation and display for vector doppler imaging using plane wave transmissions |
| CN102538913A (en) * | 2011-12-26 | 2012-07-04 | 宁波水表股份有限公司 | Correction method of flow measurement properties of single-track ultrasonic water meter |
| JP2013178127A (en) * | 2012-02-28 | 2013-09-09 | Azbil Corp | Ultrasonic flow meter and ultrasonic calorimeter |
| CN103913202A (en) * | 2014-04-14 | 2014-07-09 | 姜跃炜 | Ultrasonic water meter interception coefficient processing method |
| CN105222839A (en) * | 2015-08-21 | 2016-01-06 | 宁波市鹏盛科技发展有限公司 | The Nonlinearity Correction Method of ultrasonic flow meter instrument coefficient |
| CN113514117A (en) * | 2021-06-09 | 2021-10-19 | 宁波水表(集团)股份有限公司 | Design method of ultrasonic water meter flow channel |
| CN113607245A (en) * | 2021-07-09 | 2021-11-05 | 浙江工业大学 | Self-adaptive flow compensation method for ultrasonic water meter |
Non-Patent Citations (1)
| Title |
|---|
| 蒋仁娇: "建筑技术", 冷却水系统变流量运行的控制与分析, vol. 46, no. 2, 15 February 2015 (2015-02-15), pages 167 - 169 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116147741A (en) * | 2023-01-12 | 2023-05-23 | 宁夏隆基宁光仪表股份有限公司 | NB-IoT based ultrasonic water meter flow calibration method and system |
| CN116147741B (en) * | 2023-01-12 | 2024-05-31 | 宁夏隆基宁光仪表股份有限公司 | NB-IoT based ultrasonic water meter flow calibration method and system |
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