CN114608682A - Calibration method of flowmeter - Google Patents
Calibration method of flowmeter Download PDFInfo
- Publication number
- CN114608682A CN114608682A CN202210446567.6A CN202210446567A CN114608682A CN 114608682 A CN114608682 A CN 114608682A CN 202210446567 A CN202210446567 A CN 202210446567A CN 114608682 A CN114608682 A CN 114608682A
- Authority
- CN
- China
- Prior art keywords
- flowmeter
- calibration
- flow meter
- curve
- calibrating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The invention relates to the technical field of instrument calibration, in particular to a calibration method of a flowmeter, which comprises the following steps: acquiring input signals of a flowmeter, wherein the input signals of the flowmeter comprise differential pressure, pressure and temperature signals; within the measuring range of the flowmeter, a calibration point is selected arbitrarily for the input signal of the flowmeter, and the actual error curve in the flowmeter is subjected to standardized correction according to an error correction function preset in the flowmeter to obtain a corrected actual error curve.
Description
Technical Field
The invention relates to the technical field of instrument calibration, in particular to a calibration method of a flowmeter.
Background
At present, in the process of using the flowmeter, the flowmeter needs to be calibrated at regular time, so as to ensure that the metering precision of the flowmeter is within an error range. The conventional flowmeter calibration mostly adopts a multipoint calibration method for calibration, and during multipoint calibration, a plurality of calibration points are selected in a sequence from small to large, and then calibration is performed according to the selected plurality of calibration points, so that the flowmeter calibration operation is completed. The multipoint calibration has the defects that a plurality of calibration points need to be selected for calibration, the calibration operation is complex, the flowmeter cannot be rapidly calibrated in actual production, and the use requirements cannot be met. Therefore, to overcome the above problems, we have devised a method of calibrating a flow meter.
Disclosure of Invention
The present invention is directed to a method for calibrating a flow meter, which solves the above-mentioned problems.
The embodiment of the invention is realized by the following technical scheme:
a method of calibrating a flow meter, comprising:
acquiring an input signal of a flowmeter, wherein the input signal of the flowmeter comprises a differential pressure signal, a pressure signal and a temperature signal;
within the measuring range of the flowmeter, a calibration point is selected arbitrarily for the input signal of the flowmeter, and the actual error curve in the flowmeter is subjected to standardized correction according to an error correction function preset in the flowmeter to obtain a corrected actual error curve.
Optionally, the corrected actual error curve is combined with a preset characteristic curve in the flowmeter to perform solution, so as to obtain a calibrated output signal.
Optionally, the calculation formula of the characteristic curve is as follows:
y＝f(x,t)
wherein x is the sensor output value, t is the temperature, and y is the corrected physical quantity value.
Optionally, the calculation formula of the error correction function is as follows:
e＝φ(y,x,x0,y0)
wherein x is0For calibration point sensor output value, y0Are calibration point values.
Optionally, a specific calculation formula of the measurement output value of the flow meter is as follows:
y'＝y+e
where y' is the true measured output value.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
the flowmeter calibration method and the flowmeter calibration device are reasonable in design and simple in structure, only one calibration point needs to be randomly selected by adopting the scheme of the invention, calibration can be carried out according to the selected calibration point, the characteristic function and the error correction function, the operation is simple, and the flowmeter can be quickly calibrated in actual production.
Drawings
FIG. 1 is a schematic flow chart of a method for calibrating a flow meter according to the present invention;
FIG. 2 is a schematic diagram of a characteristic curve provided by the present invention;
FIG. 3 is a schematic diagram of a baseline error curve provided by the present invention;
fig. 4 is a schematic diagram of an actual error curve provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
As shown in fig. 1, the present invention provides an embodiment of a method for calibrating a flow meter, including:
acquiring an input signal of a flowmeter, wherein the input signal of the flowmeter comprises a differential pressure signal, a pressure signal and a temperature signal;
within the measuring range of the flowmeter, a calibration point is selected arbitrarily for the input signal of the flowmeter, and the actual error curve in the flowmeter is subjected to standardized correction according to an error correction function preset in the flowmeter to obtain a corrected actual error curve.
And then solving by combining the corrected actual error curve and a preset characteristic curve in the flowmeter to obtain a calibrated output signal.
Specifically, when the flowmeter is actually used, an error curve is often deviated, so that the actual error curve is inconsistent with a standard error curve, therefore, the error curve is corrected through an error correction function, the actual error curve is reduced to the standard error curve, the reduced standard error curve and a characteristic curve are combined for solving, a measurement output value of the flowmeter is obtained, and the measurement accuracy of the flowmeter is controlled through calibration of the error curve.
Optionally, the characteristic curve is a basic linear relationship of the meter itself, and is stored in the meter, and the calculation formula of the characteristic curve is as follows:
y＝f(x,t)
wherein x is the sensor output value, t is the temperature, and y is the corrected physical quantity value.
Optionally, the error correction curve is used for calibration during use. Due to small errors caused by use environment, installation position change, dirt and the like, calibration and error correction are needed, calibration operation is to correct an error curve, and a calculation formula of the error correction curve is as follows:
e＝φ(y,x,x0,y0)
wherein x is0For calibration point sensor output value, y0Are calibration point values.
Alternatively, the correction operation is simply a change of x0And y0The value of (2) is not changed for the characteristic curve, but the whole error curve is adjusted, the effect of multipoint calibration can be achieved, and the specific calculation formula of the measurement output value of the flowmeter is as follows:
y'＝y+e
where y' is the true measured output value.
By taking the calibration of the differential pressure signal as an example in conjunction with fig. 2, fig. 3 and fig. 4, it can be seen that the actual error curve may be shifted after the meter is used for a period of time, and after the one-key calibration, the actual error curve is corrected to the standard error curve by calculating the error correction function, thereby completing the calibration of the flowmeter.
In the embodiment of the invention, only one calibration point needs to be randomly selected, calibration can be carried out according to the selected calibration point, the characteristic function and the error correction function, the operation is simple, and the rapid calibration of the flowmeter can be realized in actual production.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method of calibrating a flow meter, comprising:
acquiring an input signal of a flowmeter, wherein the input signal of the flowmeter comprises a differential pressure signal, a pressure signal and a temperature signal;
within the measuring range of the flowmeter, a calibration point is selected arbitrarily for the input signal of the flowmeter, and the actual error curve in the flowmeter is subjected to standardized correction according to an error correction function preset in the flowmeter to obtain a corrected actual error curve.
2. The method of calibrating a flow meter according to claim 1, wherein the corrected actual error curve is solved in combination with a characteristic curve preset in the flow meter to obtain a calibrated output signal.
3. The method of calibrating a flow meter according to claim 2, wherein the characteristic curve is calculated as follows:
y＝f(x,t)
wherein x is the sensor output value, t is the temperature, and y is the corrected physical quantity value.
4. The method of calibrating a flow meter according to claim 3, wherein the error correction function is calculated as follows:
e＝φ(y,x,x0,y0)
wherein x is0For calibration point sensor output value, y0Are calibration point values.
5. The method of calibrating a flow meter according to claim 4, wherein the specific calculation formula of the measured output value of the flow meter is as follows:
y'＝y+e
where y' is the true measured output value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210446567.6A CN114608682A (en) | 2022-04-26 | 2022-04-26 | Calibration method of flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210446567.6A CN114608682A (en) | 2022-04-26 | 2022-04-26 | Calibration method of flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114608682A true CN114608682A (en) | 2022-06-10 |
Family
ID=81870011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210446567.6A Pending CN114608682A (en) | 2022-04-26 | 2022-04-26 | Calibration method of flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114608682A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935388A (en) * | 2022-07-26 | 2022-08-23 | 成都千嘉科技股份有限公司 | Correction system and method for ultrasonic gas meter |
| CN117235511A (en) * | 2023-11-13 | 2023-12-15 | 北京市计量检测科学研究院 | Secondary instrument calibration method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050046429A1 (en) * | 2003-08-07 | 2005-03-03 | Robert Gruebler | Method of detecting a gas bubble in a liquid |
| DE102010030952A1 (en) * | 2010-07-05 | 2012-01-05 | Innovative Sensor Technology Ist Ag | Device for determining and monitoring e.g. volume flow rate of biological fluid, calculates correction value based on flow rate values determined using measured temperatures, and power required to maintain temperature of heating element |
| US20130340519A1 (en) * | 2012-06-22 | 2013-12-26 | Krohne Ag | Flow-rate measurement system |
| CN104390680A (en) * | 2014-12-22 | 2015-03-04 | 湖南威铭能源科技有限公司 | Flow error correction method for time difference type ultrasonic heat meter |
| CN104749544A (en) * | 2015-04-02 | 2015-07-01 | 北京航空航天大学 | Electromagnetic compatibility current probe transmission resistance temperature error correction method |
| CN111998919A (en) * | 2020-08-28 | 2020-11-27 | 金卡智能集团股份有限公司 | Gas meter calibration method and device |
-
2022
- 2022-04-26 CN CN202210446567.6A patent/CN114608682A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050046429A1 (en) * | 2003-08-07 | 2005-03-03 | Robert Gruebler | Method of detecting a gas bubble in a liquid |
| DE102010030952A1 (en) * | 2010-07-05 | 2012-01-05 | Innovative Sensor Technology Ist Ag | Device for determining and monitoring e.g. volume flow rate of biological fluid, calculates correction value based on flow rate values determined using measured temperatures, and power required to maintain temperature of heating element |
| US20130340519A1 (en) * | 2012-06-22 | 2013-12-26 | Krohne Ag | Flow-rate measurement system |
| CN104390680A (en) * | 2014-12-22 | 2015-03-04 | 湖南威铭能源科技有限公司 | Flow error correction method for time difference type ultrasonic heat meter |
| CN104749544A (en) * | 2015-04-02 | 2015-07-01 | 北京航空航天大学 | Electromagnetic compatibility current probe transmission resistance temperature error correction method |
| CN111998919A (en) * | 2020-08-28 | 2020-11-27 | 金卡智能集团股份有限公司 | Gas meter calibration method and device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935388A (en) * | 2022-07-26 | 2022-08-23 | 成都千嘉科技股份有限公司 | Correction system and method for ultrasonic gas meter |
| CN114935388B (en) * | 2022-07-26 | 2022-11-01 | 成都千嘉科技股份有限公司 | Correction method implemented by correction system based on ultrasonic gas meter |
| CN117235511A (en) * | 2023-11-13 | 2023-12-15 | 北京市计量检测科学研究院 | Secondary instrument calibration method |
| CN117235511B (en) * | 2023-11-13 | 2024-02-20 | 北京市计量检测科学研究院 | Secondary instrument calibration method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114608682A (en) | Calibration method of flowmeter | |
| US7979227B2 (en) | Calibration in a laboratory reference method | |
| US10359308B2 (en) | Flow meter and a method of calibration | |
| CN109990712B (en) | Online calibration method for width gauge | |
| CN103837300A (en) | Pressure sensor calibration method with temperature compensation function | |
| CN105698686A (en) | Device and method of detecting crack width measuring instrument indication value errors | |
| CN102879061B (en) | Water gauge error correction method based on fitted equation | |
| CN110906993B (en) | Flow meter metering temperature compensation method and ultrasonic flow meter | |
| CN105846920A (en) | Eight-item error calibration method for vector network analyzer and N+1 receiver structure | |
| CN104970776A (en) | Body temperature detection method and high-precision dynamic calibration electronic thermometer device | |
| CN115265724A (en) | Liquid level meter field calibration device and method for obtaining calibration result | |
| CN113447234A (en) | Wind tunnel electronic pressure scanning valve traceability device and traceability method thereof | |
| CN104142299A (en) | Pressure compensation method of infrared methane sensor | |
| CN115826070B (en) | Method for determining mining value position in white-sentry-type uranium ore to be detected by using core logger | |
| KR20090014711A (en) | Method of calibrating a pressure gauge and system for calibrating a pressure gauge using the same | |
| KR102055055B1 (en) | Electronic Flow Meter and The Measurement Error Correcting Methode | |
| CN115639335A (en) | Water quality monitoring data calibration method, system and computer readable storage medium | |
| CN105509844A (en) | Open type commutator calibration method for general liquid flow calibrating apparatus | |
| CN111380587B (en) | Method for compensating result error of measuring vertical tank capacity by adopting Monte Carlo method | |
| CN114485863A (en) | Flow error correction method, system, computer and medium for ultrasonic water meter | |
| CN114459573A (en) | Novel calibration model and calibration method of ultrasonic gas meter and ultrasonic gas meter | |
| CN111780835A (en) | Calibration method for high-efficiency liquid phase transfer liquid flowmeter | |
| CN104819703B (en) | A kind of angle of inclination parameter fitness method that fulcrum is sensed for inclination angle | |
| CN113848453B (en) | I/F circuit linearity calibration method and system | |
| CN116202596B (en) | Gamma empty pipe count real-time correction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |