CN113008337A - Method and system for reducing measurement error caused by scaling of flow channel of ultrasonic water meter - Google Patents
Method and system for reducing measurement error caused by scaling of flow channel of ultrasonic water meter Download PDFInfo
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- CN113008337A CN113008337A CN202110238437.9A CN202110238437A CN113008337A CN 113008337 A CN113008337 A CN 113008337A CN 202110238437 A CN202110238437 A CN 202110238437A CN 113008337 A CN113008337 A CN 113008337A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000005259 measurement Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012216 screening Methods 0.000 claims abstract description 37
- 238000004458 analytical method Methods 0.000 claims description 8
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
Abstract
The invention discloses a method for reducing measurement errors caused by scaling of an ultrasonic water meter flow passage, which comprises the following steps: acquiring data of ultrasonic data in a set period; analyzing and screening to determine unqualified ultrasonic data; judging whether the unqualified ultrasonic data reaches a set standard or not; if the judgment result is yes, the ultrasonic control value is adjusted, and if the judgment result is not yes, the next measurement period is started. The invention can effectively reduce the measurement error caused by the scaling of the water meter and improve the measurement precision of the water meter.
Description
Technical Field
The invention relates to the technical field of ultrasonic water meters, in particular to a method and a system for reducing measurement errors caused by scaling of a flow channel of an ultrasonic water meter.
Background
The pipeline of different quality of water all can the scale deposit through long-time use, and the scale deposit can arouse metering error to the mechanical table, and to the supersound water gauge, because ultrasonic wave in the use, can have the deposit and the scale deposit of impurity around the sensor, influence the performance of sensor, the energy that the sensor sent also can slowly decrement, and the signal of telecommunication that the sensor received simultaneously also can constantly weaken. This process, while slow and long-lasting, will result in measurement accuracy and precision for ultrasonic water meters over the years. The pipeline scaling can not be avoided, and many technicians assume that some hydrophilic or hydrophobic chemicals are used for reducing the scaling degree of the pipeline scaling, but the use of chemicals in drinking water has too large limitation and can not be adopted finally.
Disclosure of Invention
The invention provides a method and a system for reducing measurement errors caused by scaling of a flow passage of an ultrasonic water meter, which can effectively reduce the measurement errors caused by scaling of the water meter and improve the measurement precision of the water meter.
In order to solve the technical problem, the invention provides a method for reducing measurement errors caused by scaling of a flow passage of an ultrasonic water meter, which comprises the following steps:
acquiring data of ultrasonic data in a set period;
analyzing and screening to determine unqualified ultrasonic data;
judging whether the unqualified ultrasonic data reaches a set standard or not;
if the judgment result is yes, the ultrasonic control value is adjusted, and if the judgment result is not yes, the next measurement period is started.
As a preferred aspect of the above technical solution, the unqualified ultrasonic data is ultrasonic data whose pulse width ratio does not reach the set range, and the analyzing and screening to determine the unqualified ultrasonic data specifically includes: analyzing whether the pulse width ratio of the acquired ultrasonic data reaches a set range or not, and screening out the ultrasonic data which does not reach the set range.
As a preferable aspect of the above technical solution, before the analyzing and screening to determine the unqualified ultrasonic data, the method further includes: acquiring an ultrasonic output curve based on acquired ultrasonic data, determining an initial threshold datum line based on an initial threshold of ultrasonic output, and analyzing whether a pulse width ratio of the acquired ultrasonic data reaches a set range specifically comprises: and analyzing whether the ratio of the pulse width of each sine period of the ultrasonic output curve between the pulse width of the initial threshold datum line and the pulse width of the ultrasonic output curve at the zero position is in a set range.
Preferably, in the above technical solution, the setting range is 50% to 90%, and the analyzing whether a ratio of a pulse width of the ultrasonic output curve per sinusoidal period between an initial threshold reference line and a pulse width at a zero point position is in the setting range specifically includes: whether the ratio of the pulse width of each sine period of the ultrasonic output curve between the initial threshold datum line and the zero point position is 50% -90% or not is analyzed, and the step of screening out the ultrasonic data which do not reach the set range specifically comprises the following steps: screening out the number of sine cycles of which the ratio of the pulse width of each sine cycle of the ultrasonic output curve at the initial threshold datum line to the pulse width at the zero position is not 50-90%.
As a preferable aspect of the above technical solution, the judging whether the unqualified ultrasonic data reaches the set etalon body includes: and judging whether the number of the sine cycles which are not between 50 and 90 percent is higher than the set times, if the number of the sine cycles which are not between 50 and 90 percent is higher than the set times, judging the result to be yes, and if the number of the sine cycles which are not between 50 and 90 percent is lower than the set times, judging the result to be no.
Preferably, in the above technical solution, the initial threshold of the ultrasonic wave is 0 to 36, and if the determination result is yes, adjusting the ultrasonic wave control value specifically includes: and if so, adjusting the initial threshold value of the ultrasonic output within the range of 0-36.
In another aspect, the present invention provides a system for reducing measurement errors caused by scaling in a flow channel of an ultrasonic water meter, including:
the data acquisition unit is used for acquiring data of the ultrasonic data in a set period;
the analysis screening unit is used for analyzing and screening to determine unqualified ultrasonic data;
the judging unit is used for judging whether the unqualified ultrasonic data reaches a set standard;
and the control unit is used for controlling and adjusting the ultrasonic control value if the judgment result is yes, and controlling and starting the next measurement period if the judgment result is not yes.
Preferably, the unqualified ultrasonic data is ultrasonic data with a pulse width ratio which does not reach a set range, and accordingly, the analysis and screening unit is specifically configured to analyze whether the pulse width ratio of the acquired ultrasonic data reaches the set range, and screen out the ultrasonic data which does not reach the set range.
As a preferred aspect of the foregoing technical solution, the system further includes a calculating unit, the calculating unit is configured to obtain an ultrasonic output curve based on the acquired ultrasonic data, and determine an initial threshold reference line based on an initial threshold of the ultrasonic output, and accordingly, the analyzing and screening unit is specifically configured to analyze whether a ratio between a pulse width of each sinusoidal cycle of the ultrasonic output curve at the initial threshold reference line and a pulse width at the zero point position is within a set range.
Preferably, in the above technical solution, the setting range is 50% to 90%, and the analyzing and screening unit is further specifically configured to analyze whether a ratio between a pulse width of each sinusoidal cycle of the ultrasonic output curve at the initial threshold reference line and a pulse width at the zero point position is 50% to 90%, and screen the number of sinusoidal cycles in which the ratio between the pulse width of each sinusoidal cycle of the ultrasonic output curve at the initial threshold reference line and the pulse width at the zero point position is not 50% to 90%.
The invention provides a method for reducing measurement errors caused by scaling of a flow passage of an ultrasonic water meter, which reduces the measurement errors by controlling the output of ultrasonic waves based on the measurement characteristics of the ultrasonic water meter, and particularly, collects ultrasonic data of the water meter within a certain period, analyzes the collected ultrasonic data, screens out unqualified ultrasonic data, judges whether the unqualified ultrasonic data reaches a set standard or not, adjusts an ultrasonic control value to control the ultrasonic data output by the ultrasonic waves if the unqualified ultrasonic data reaches the set standard, starts the next measurement period if the unqualified ultrasonic data does not reach the set standard, influences the ultrasonic waves sent by an ultrasonic transducer of the ultrasonic water meter under the condition of scaling of the ultrasonic water meter so as to influence the measurement accuracy of the ultrasonic water meter, and collects the ultrasonic data, and the influence of the scaling condition on the ultrasonic output of the transducer is determined by screening unqualified ultrasonic data, and then when the unqualified ultrasonic data reaches the set standard, the ultrasonic output of the transducer is adjusted to enable the ultrasonic output of the transducer to reach the set standard, so that the influence of scaling on the ultrasonic water meter is reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for reducing measurement errors caused by scaling of a flow passage of an ultrasonic water meter according to the present invention;
FIG. 2 is a schematic diagram of a system for reducing measurement errors caused by scaling in a flow channel of an ultrasonic water meter according to the present invention;
FIG. 3 shows a schematic of an ultrasonic output curve in the present invention;
FIG. 4 is a schematic diagram showing an ultrasonic output curve and an initial threshold baseline in accordance with the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a method for reducing measurement errors caused by scaling of a flow channel of an ultrasonic water meter, including:
step 100: acquiring data of ultrasonic data in a set period;
step 200: analyzing and screening to determine unqualified ultrasonic data;
step 300: judging whether the unqualified ultrasonic data reaches a set standard or not;
step 400: if the judgment result is yes, the ultrasonic control value is adjusted, and if the judgment result is not yes, the next measurement period is started.
The embodiment provides a method for reducing measurement errors caused by scaling of a flow passage of an ultrasonic water meter, which reduces the measurement errors by controlling the output of ultrasonic waves based on the measurement characteristics of the ultrasonic water meter, and particularly, collects ultrasonic data of the water meter within a certain period, analyzes the collected ultrasonic data, screens out unqualified ultrasonic data, judges whether the unqualified ultrasonic data reaches a set standard, adjusts an ultrasonic control value to control the ultrasonic data output by the ultrasonic waves if the unqualified ultrasonic data reaches the set standard, starts the next measurement period if the unqualified ultrasonic data does not reach the set standard, influences the ultrasonic waves sent by an ultrasonic transducer of the ultrasonic water meter under the condition of scaling of the ultrasonic water meter so as to influence the measurement accuracy of the ultrasonic water meter, and collects the ultrasonic data, and the influence of the scaling condition on the ultrasonic output of the transducer is determined by screening unqualified ultrasonic data, and then when the unqualified ultrasonic data reaches the set standard, the ultrasonic output of the transducer is adjusted to enable the ultrasonic output of the transducer to reach the set standard, so that the influence of scaling on the ultrasonic water meter is reduced.
Specifically, the set period of this embodiment may be determined as needed, and the ultrasonic wave is emitted from the transducer on the ultrasonic water meter to measure the flow rate, in this embodiment, the sensor may be used to complete the acquisition of ultrasonic data, or of course, the sensor may be connected to the transducer through the control circuit to acquire data of the ultrasonic wave emitted from the transducer, and the acquired data may be the wave frequency, the wave wavelength, and the like, and may obtain the specific output condition of the output ultrasonic wave based on the acquired data.
The unqualified ultrasonic data in the embodiment is ultrasonic waves which are not in a normal state, the ultrasonic waves output by the transducer are ultrasonic waves in a normal state under the condition that the transducer is not scaled, and the ultrasonic waves output by the transducer are different from the ultrasonic waves in the normal state under the condition that the transducer is scaled, so that the process is to screen out the ultrasonic waves with abnormal output.
In this embodiment, it is also necessary to determine whether the unqualified ultrasonic data meets a set standard, which can improve the efficiency of data processing, and specifically, in a normal use state, an abnormal condition may occur in the output of the ultrasonic data.
In a further implementation manner of this embodiment, the failed ultrasonic data is ultrasonic data whose pulse width ratio does not reach the set range, and the analyzing and screening to determine the failed ultrasonic data specifically includes: analyzing whether the pulse width ratio of the acquired ultrasonic data reaches a set range or not, and screening out the ultrasonic data which does not reach the set range.
In the embodiment, the unqualified ultrasonic data is judged more simply and conveniently through the pulse width ratio of the ultrasonic waves, in addition, the number of data analysis and processing can be reduced, and the data processing efficiency is improved. Further, it may also allow more accurate analysis and screening of ultrasound data.
In a further possible implementation of this embodiment, prior to analyzing the screening to determine failing ultrasound data, the method further comprises: acquiring an ultrasonic output curve based on the acquired ultrasonic data, determining an initial threshold datum line based on an initial threshold of ultrasonic output, and analyzing whether a pulse width ratio of the acquired ultrasonic data reaches a set range specifically comprises: and analyzing whether the ratio of the pulse width of each sine period of the ultrasonic output curve at the initial threshold datum line to the pulse width at the zero position is in a set range.
In the embodiment, the ultrasonic output curve is obtained through the acquired ultrasonic data, the initial threshold datum line is determined according to the initial threshold, and whether the output ultrasonic data is in a normal state or not is determined by analyzing whether the ratio of the pulse width of each sinusoidal cycle of the ultrasonic output curve between the initial threshold datum line and the pulse width at the zero position is in a set range or not.
Referring to fig. 3 and 4, the ultrasonic data output from the transducer is substantially sinusoidal and has an initial threshold value when the ultrasonic data is output, the initial threshold value is located on a line parallel to the transverse coordinate as an initial threshold reference line, and is located below the initial threshold reference line as a zero line, and P is a pulse width at the initial threshold reference line for each sinusoidal cycle.
In a further implementation manner of this embodiment, the setting range is 50% to 90%, and the analyzing whether a ratio between a pulse width of each sinusoidal cycle of the ultrasonic output curve at the initial threshold reference line and a pulse width at the zero point position is in the setting range specifically includes: whether the ratio of the pulse width of each sine period of the ultrasonic output curve between the initial threshold datum line and the zero point position is 50% -90% or not is analyzed, and the step of screening out the ultrasonic data which do not reach the set range specifically comprises the following steps: screening out the number of sine cycles of which the ratio of the pulse width of each sine cycle of the ultrasonic output curve at the initial threshold datum line to the pulse width at the zero position is not 50-90%.
In a normal state, in an actual use process, the ratio of the pulse width of the ultrasonic wave output by the transducer in each sine period at the initial threshold datum line to the pulse width at the zero position is between 50% and 90%, and when the pulse width exceeds the range, the output ultrasonic wave data is the ultrasonic wave in an abnormal state.
The embodiment can accurately judge the ultrasonic waves which are abnormally output.
In a further implementation manner of this embodiment, the determining whether the unqualified ultrasonic data reaches the set etalon body includes: and judging whether the number of the sine cycles which are not between 50 and 90 percent is higher than the set times, if the number of the sine cycles which are not between 50 and 90 percent is higher than the set times, judging the result to be yes, and if the number of the sine cycles which are not between 50 and 90 percent is lower than the set times, judging the result to be no.
In the embodiment, the number of the sinusoidal cycles which are not 50% -90% is judged to determine whether the ultrasonic data reaches the set standard, so that the working efficiency can be improved, and the workload of data processing can be reduced.
In a further implementation manner of this embodiment, the initial threshold of the ultrasonic wave is 0 to 36, and if the determination result is yes, adjusting the ultrasonic wave control value specifically includes: and if so, adjusting the initial threshold value of the ultrasonic output within the range of 0-36.
In the embodiment, the initial threshold value output by the transducer is controlled and adjusted to enable the pulse width ratio of the ultrasonic waves output by the transducer to be 50% -90% of the number of sinusoidal cycles to reach the standard, so that the control is simple and convenient, and the adjustment can be effectively carried out to reduce the error of the ultrasonic water meter.
Particularly, each ultrasonic water meter can set up suitable initial threshold value so that it can realize high accuracy operation based on its self parameter, then realize adjusting ultrasonic wave pulse width ratio through initial threshold value in the adjustment period when the ultrasonic wave of abnormal output appears in the condition such as transducer scale deposit, control more simple and convenient to can realize adjusting fast effectively.
In addition, in the embodiment, it is determined whether the number of sinusoidal cycles that is not 50% to 90% is higher than the set number of times, and the set number of times may be manually adjusted as needed.
The working principle in the embodiment is that the ultrasonic water meter can accurately measure when the pulse width ratio of the transducer is controlled within the range of 50% -90% in a normal working state, so that abnormal conditions such as scaling of the ultrasonic water meter are judged by monitoring the pulse width ratio, and the pulse width ratio is adjusted by adjusting an initial threshold value.
Another aspect of an embodiment of the present invention provides a system for reducing measurement errors caused by scaling of a flow channel of an ultrasonic water meter, including:
the data acquisition unit is used for acquiring data of the ultrasonic data in a set period;
the analysis screening unit is used for analyzing and screening to determine unqualified ultrasonic data;
the judging unit is used for judging whether the unqualified ultrasonic data reaches a set standard;
and the control unit is used for controlling and adjusting the ultrasonic control value if the judgment result is yes, and controlling and starting the next measurement period if the judgment result is not yes.
In a further implementation manner of this embodiment, the unqualified ultrasonic data is ultrasonic data whose pulse width ratio does not reach the set range, and accordingly, the analysis and screening unit is specifically configured to analyze whether the pulse width ratio of the acquired ultrasonic data reaches the set range, and screen out the ultrasonic data that does not reach the set range.
In a further implementation manner of this embodiment, the system further includes a calculating unit, the calculating unit is configured to obtain an ultrasonic output curve based on the acquired ultrasonic data, and determine an initial threshold reference line based on an initial threshold of the ultrasonic output, and accordingly, the analyzing and screening unit is specifically configured to analyze whether a ratio between a pulse width of each sinusoidal cycle of the ultrasonic output curve at the initial threshold reference line and a pulse width at the zero point position is within a set range.
In a further implementation manner of this embodiment, the setting range is 50% to 90%, and the analyzing and screening unit is further specifically configured to analyze whether a ratio between a pulse width of each sinusoidal cycle of the ultrasonic output curve at the initial threshold reference line and a pulse width at the zero point position is 50% to 90%, and screen the number of sinusoidal cycles for which the ratio between the pulse width of each sinusoidal cycle of the ultrasonic output curve at the initial threshold reference line and the pulse width at the zero point position is not 50% to 90%.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A method for reducing measurement errors caused by scaling of a flow passage of an ultrasonic water meter is characterized by comprising the following steps:
acquiring data of ultrasonic data in a set period;
analyzing and screening to determine unqualified ultrasonic data;
judging whether the unqualified ultrasonic data reaches a set standard or not;
if the judgment result is yes, the ultrasonic control value is adjusted, and if the judgment result is not yes, the next measurement period is started.
2. The method of reducing measurement errors caused by scaling of a flow passage of an ultrasonic water meter according to claim 1, wherein the unqualified ultrasonic data is ultrasonic data having a pulse width ratio which does not reach a set range, and the analyzing and screening to determine the unqualified ultrasonic data specifically comprises: analyzing whether the pulse width ratio of the acquired ultrasonic data reaches a set range or not, and screening out the ultrasonic data which does not reach the set range.
3. The method of reducing measurement errors caused by scaling in an ultrasonic water meter channel as set forth in claim 2, wherein prior to said analyzing and screening to determine unacceptable ultrasonic data, said method further comprises: acquiring an ultrasonic output curve based on acquired ultrasonic data, determining an initial threshold datum line based on an initial threshold of ultrasonic output, and analyzing whether a pulse width ratio of the acquired ultrasonic data reaches a set range specifically comprises: and analyzing whether the ratio of the pulse width of each sine period of the ultrasonic output curve between the pulse width of the initial threshold datum line and the pulse width of the ultrasonic output curve at the zero position is in a set range.
4. The method of reducing measurement errors caused by scaling in a flow passage of an ultrasonic water meter as set forth in claim 3, wherein the set range is 50% -90%, and the analyzing whether the ratio of the pulse width of the ultrasonic output curve per sine period at the initial threshold reference line to the pulse width at the zero position is within the set range specifically comprises: whether the ratio of the pulse width of each sine period of the ultrasonic output curve between the initial threshold datum line and the zero point position is 50% -90% or not is analyzed, and the step of screening out the ultrasonic data which do not reach the set range specifically comprises the following steps: screening out the number of sine cycles of which the ratio of the pulse width of each sine cycle of the ultrasonic output curve at the initial threshold datum line to the pulse width at the zero position is not 50-90%.
5. The method of reducing measurement errors caused by scaling of a flow passage of an ultrasonic water meter according to claim 4, wherein the step of judging whether the unqualified ultrasonic data reaches a set etalon body comprises the steps of: and judging whether the number of the sine cycles which are not between 50 and 90 percent is higher than the set times, if the number of the sine cycles which are not between 50 and 90 percent is higher than the set times, judging the result to be yes, and if the number of the sine cycles which are not between 50 and 90 percent is lower than the set times, judging the result to be no.
6. The method for reducing the measurement error caused by the scaling of the flow passage of the ultrasonic water meter according to claim 5, wherein the initial threshold value of the ultrasonic wave is 0-36, and if the judgment result is yes, the adjusting the control value of the ultrasonic wave specifically comprises: and if so, adjusting the initial threshold value of the ultrasonic output within the range of 0-36.
7. A system for reducing measurement errors caused by scaling in a flow channel of an ultrasonic water meter, comprising:
the data acquisition unit is used for acquiring data of the ultrasonic data in a set period;
the analysis screening unit is used for analyzing and screening to determine unqualified ultrasonic data;
the judging unit is used for judging whether the unqualified ultrasonic data reaches a set standard;
and the control unit is used for controlling and adjusting the ultrasonic control value if the judgment result is yes, and controlling and starting the next measurement period if the judgment result is not yes.
8. The system for reducing the measurement error caused by the scaling of the flow passage of the ultrasonic water meter according to claim 7, wherein the unqualified ultrasonic data is ultrasonic data with a pulse width ratio which does not reach a set range, and accordingly, the analysis and screening unit is specifically configured to analyze whether the pulse width ratio of the acquired ultrasonic data reaches the set range, and screen out the ultrasonic data which does not reach the set range.
9. The system of reducing measurement errors caused by scale formation in a flow passage of an ultrasonic water meter as set forth in claim 8, further comprising a computing unit for obtaining an ultrasonic output curve based on the collected ultrasonic data and determining an initial threshold reference line based on an initial threshold of the ultrasonic output, and accordingly, the analyzing and screening unit is specifically configured to analyze whether a ratio of a pulse width of the ultrasonic output curve per one sinusoidal cycle at the initial threshold reference line to a pulse width at a zero point position is within a set range.
10. The system of claim 9, wherein the predetermined range is 50% to 90%, the analysis and screening unit is further configured to analyze whether a ratio of a pulse width of each sine cycle of the ultrasonic output curve at an initial threshold reference line to a pulse width at a zero point position is 50% to 90%, and screen out a number of sine cycles in which the ratio of the pulse width of each sine cycle of the ultrasonic output curve at the initial threshold reference line to the pulse width at the zero point position is not 50% to 90%.
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| CN108254045A (en) * | 2018-02-01 | 2018-07-06 | 中国计量大学 | A kind of simple ultrasonic water meter self-diagnosing method based on TDC-GP30 |
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2021
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|---|---|---|---|---|
| US20020050176A1 (en) * | 2000-09-15 | 2002-05-02 | Su Tyan Khak | Ultrasonic multi-channel flow measuring method |
| CN103344288A (en) * | 2013-06-25 | 2013-10-09 | 国家电网公司 | Time difference type ultrasonic flowmeter measuring method based on zero point analysis |
| CN106643938A (en) * | 2017-01-03 | 2017-05-10 | 无锡水表有限责任公司 | Self-cleaning judgment method of intelligent ultrasonic water meter |
| CN107490409A (en) * | 2017-08-09 | 2017-12-19 | 辽宁航宇星物联仪表科技有限公司 | A kind of family ultrasonic water meter mistake proofing ripple improved method |
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