CN109506745A - A kind of calibration method of Ultrasonic Wave Flowmeter analog output module - Google Patents
A kind of calibration method of Ultrasonic Wave Flowmeter analog output module Download PDFInfo
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- CN109506745A CN109506745A CN201811544081.6A CN201811544081A CN109506745A CN 109506745 A CN109506745 A CN 109506745A CN 201811544081 A CN201811544081 A CN 201811544081A CN 109506745 A CN109506745 A CN 109506745A
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- host computer
- ultrasonic wave
- wave flowmeter
- analog output
- module
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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
-
- 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
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of calibration methods of Ultrasonic Wave Flowmeter analog output module, it is characterized in that, including Ultrasonic Wave Flowmeter, serial communication cable, multimeter, host computer and the calibration software module in host computer, analog output functional module is equipped in the Ultrasonic Wave Flowmeter, the multimeter measurement accuracy is higher than the output accuracy of Ultrasonic Wave Flowmeter, and the host computer is connect by serial communication cable with Ultrasonic Wave Flowmeter.The component that the present invention need to only be able to satisfy application scenarios in hardware design using temperature drift can, and it is not high for the required precision of device, the hardware cost of electronic circuit can be thus substantially reduced, and also can satisfy the required precision of flowmeter completely by the output accuracy of signal after calibration.
Description
Technical field
The present invention relates to ultrasonic instrument field of instrumentation technology more particularly to a kind of Ultrasonic Wave Flowmeter analog quantity are defeated
The calibration method of module out.
Background technique
With raising of the people to environmental protection consciousness in recent years, natural gas obtains more next as a kind of cleaning high-grade energy
The development of more applications, Gas Industry is also getting faster.The main measuring instrument of Gas Industry is with Roots's table and turbine table
Based on, but these conventional instruments have high to metering requirements for gas quality, maintenance is frequent, maintenance cost is high, intelligence degree is low etc.
Disadvantage, these weakness can all restrict the fast development of Gas Industry.
Ultrasonic Wave Flowmeter has compared with differential-pressure instrumentation, positive displacement instrument and conventional speed formula instrument etc.
It is wide-range ratio, intelligence, easy to install, the advantages that low cost, high-precision, long service life, low-maintenance cost.It is answered extensively at present
For following field: 1) natural gas high pressure long-distance transport pipes and province, city-level point defeated station management through quantification；2) gas management through quantification；
3) natural gas coal-bed gas exploitation utilizes；4) liquefied natural gas and liquefied petroleum gas；5) large scale industry gas management through quantification；6) blast furnace
Coal gas and coke oven gas measurement；7) other energy-saving and emission-reduction gas emission measurements etc..
In natural gas and some industrial control fields, flowmeter is needed to provide 4-20mA current signal interface and corresponding two
Secondary instrument or control system (DCS, PLC etc.) are docked, read in control current signal on system or secondary meter into
Row conversion can know the flow value on flowmeter, realize the function of remotely monitoring, and therefore, analog signals export accurate
Degree will have a direct impact on the metric results of flowmeter.
There are two kinds of drawbacks for existing analogue quantity output circuit: if on the one hand in order to realize the accurate defeated of analog signals
Out, it generally can all take the electronic component of high-precision and temperature drift characteristic very little to be realized, cause circuit cost higher；It is another
If aspect designs circuit merely in order to reduce circuit cost, using the poor component of precision and temperature drift characteristic, then can damage
Lose the output accuracy of analog quantity.
Summary of the invention
The purpose of the present invention is to solve existing analogue quantity output circuit there are the problem of, providing one kind can drop significantly
The hardware cost of low electronic circuit, and the precision of flowmeter also can satisfy by the output accuracy of signal after calibration completely
It is required that Ultrasonic Wave Flowmeter analog output module calibration method.
To achieve the goals above, the present invention adopts the following technical scheme that, a kind of Ultrasonic Wave Flowmeter analog quantity is defeated
The calibration method of module out, which is characterized in that including Ultrasonic Wave Flowmeter, serial communication cable, multimeter, host computer and
Calibration software module in host computer, the Ultrasonic Wave Flowmeter is interior to be equipped with analog output functional module, institute
The multimeter measurement accuracy stated is higher than the output accuracy of Ultrasonic Wave Flowmeter, and the host computer passes through serial communication cable
It being connect with Ultrasonic Wave Flowmeter, the calibration method includes the following steps, 1) host computer calibration software module generation mould
Analog quantity exports theoretical value y1, and the analog output function mould of Ultrasonic Wave Flowmeter is sent to by serial communication cable
Block；2) analog output functional module exports corresponding analog signals according to theoretical value y1；3) multimeter measures gas ultrasound
The output signal x1 of wave flowmeter, and x1 is inputted host computer calibration software module；4) host computer calibration software module generates mould
Analog quantity exports theoretical value y2, is sent to analog output functional module again；5) analog output functional module is according to theoretical value
Y2 exports corresponding analog signals；6) the output signal x2 of multimeter measurement Ultrasonic Wave Flowmeter, and x2 is inputted
Position machine calibration software module；7) host computer calibration software module establishes equation group y1=kx1+b and y2=kx2+b, and finds out k, b
Value；8) k, b value are handed down to analog output functional module by host computer calibration software module；9) host computer calibration software module produces
Raw check value y3, is sent to analog output functional module；10) analog output functional module according to check value y3 and combine by
The calculated k of host computer, b value export analog signals；11) the output signal x3 of multimeter measurement Ultrasonic Wave Flowmeter,
And x3 is inputted host computer calibration software module；12) host computer calibration software module calculates trueness error, and is judged,
This calibration terminates if trueness error is able to satisfy the required precision of Ultrasonic Wave Flowmeter, if trueness error is unsatisfactory for
It is re-execute the steps 1) if required precision.
The major function of this programme calibration software module is to calculate once linear fitting parameter k, b and inspection flow meter calibrating
Analog output precision afterwards: (1) current value measured required for flowmeter output is controlled, and according to the collected electricity of multimeter
Flow valuve, establish equation group y1=kx1+b and y2=kx2+b (in equation group x1 and x2 be respectively used to calibration measured signal value, y1,
Y2 is theory signal value corresponding to x1, x2, and what is taken in this programme is the 25% signal value point and 75% of 0-20mA signal respectively
Signal value point) solution obtains the k and b in once linear fitting algorithm, and the k and b that solution obtains are sent to stream by serial ports
Meter；(2) verification data command is sent using the current value after flowmeter output calibration, and multimeter reads the measured value after calibration
Afterwards, output accuracy is calculated with software examine calibration result.
Analog output functional module in this programme Ultrasonic Wave Flowmeter is the calibration object in this programme, is led to
It crosses Serial Port Line and after host computer calibration software establishes connection, on the one hand corresponding electric current can be exported according to the order of calibration software
Value, the analog signals after once linear fitting algorithm y=kx+b output calibration is on the other hand combined after receiving calibration command
Value.
Preferably, the analog output functional module of the Ultrasonic Wave Flowmeter exports 4-20mA current analog
Amount.
Preferably, analog output theoretical value y1, y2 that the calibration software module generates is respectively that analog quantity is defeated
25%, the 75% of functional module output maximum value out.
The beneficial effect of this programme is: the component that need to be only able to satisfy application scenarios using temperature drift in hardware design can
With, and it is not high for the required precision of device, the hardware cost of electronic circuit can be thus substantially reduced, and pass through school
The output accuracy of signal also can satisfy the required precision of flowmeter completely after standard.
Detailed description of the invention
Fig. 1 is a kind of schematic illustration of the invention.
Fig. 2 is calibration method flowage structure figure of the invention.
Specific embodiment
The present invention is further explained with reference to the accompanying drawing:
As shown in Figure 1 and Figure 2, the calibration method of Ultrasonic Wave Flowmeter analog output module, which is characterized in that packet
Include Ultrasonic Wave Flowmeter, serial communication cable, multimeter, host computer and the calibration software module in host computer, institute
Analog output functional module is equipped in the Ultrasonic Wave Flowmeter stated, the multimeter measurement accuracy is higher than gas ultrasound
The output accuracy of wave flowmeter, the host computer are connect by serial communication cable with Ultrasonic Wave Flowmeter；
The analog output functional module of Ultrasonic Wave Flowmeter exports 4-20mA current-mode analog quantity；
Analog output theoretical value y1, y2 that the calibration software module generates is respectively analog output functional module
Export 25%, the 75% of maximum value.
Specific implementation process is: calibration method includes the following steps, 1) it is defeated to generate analog quantity for host computer calibration software module
Theoretical value y1 out, and it is sent to by serial communication cable the analog output functional module of Ultrasonic Wave Flowmeter；2) mould
Analog quantity output function module exports corresponding analog signals according to theoretical value y1；3) multimeter measures Ultrasonic Wave Flowmeter
Output signal x1, and x1 input host computer calibration software module；4) host computer calibration software module generates analog output
Theoretical value y2 is sent to analog output functional module again；5) analog output functional module is according to theoretical value y2 output phase
The analog signals answered；6) the output signal x2 of multimeter measurement Ultrasonic Wave Flowmeter, and x2 input host computer calibration
Software module；7) host computer calibration software module establishes equation group y1=kx1+b and y2=kx2+b, and finds out k, b value；8) on
For position machine calibration software module k, b value is handed down to analog output functional module；9) host computer calibration software module generates verification
Value y3 is sent to analog output functional module；10) analog output functional module according to check value y3 and is combined by host computer
Calculated k, b value export analog signals；11) the output signal x3 of multimeter measurement Ultrasonic Wave Flowmeter, and x3
Input host computer calibration software module；12) host computer calibration software module calculates trueness error, and is judged, if smart
Degree error is able to satisfy the required precision of Ultrasonic Wave Flowmeter, and then this calibration terminates, if trueness error is unsatisfactory for precision and wants
It is re-execute the steps 1) if asking.
Claims (3)
1. a kind of calibration method of Ultrasonic Wave Flowmeter analog output module, which is characterized in that including gas ultrasound wave
Flowmeter, serial communication cable, multimeter, host computer and the calibration software module in host computer, the gas ultrasound
Analog output functional module is equipped in wave flowmeter, the multimeter measurement accuracy is higher than the defeated of Ultrasonic Wave Flowmeter
Precision out, the host computer are connect by serial communication cable with Ultrasonic Wave Flowmeter, and the calibration method includes
Following steps, 1) host computer calibration software module generates analog output theoretical value y1, and is sent to by serial communication cable
The analog output functional module of Ultrasonic Wave Flowmeter；2) analog output functional module is answered according to theoretical value y1 output phase
Analog signals；3) the output signal x1 of multimeter measurement Ultrasonic Wave Flowmeter, and x1 input host computer calibration is soft
Part module；4) host computer calibration software module generates analog output theoretical value y2, is sent to analog output function mould again
Block；5) analog output functional module exports corresponding analog signals according to theoretical value y2；6) multimeter measures gas ultrasound
The output signal x2 of wave flowmeter, and x2 is inputted host computer calibration software module；7) host computer calibration software module foundation side
Journey group y1=kx1+b and y2=kx2+b, and k is found out, b value；8) k, b value are handed down to analog quantity by host computer calibration software module
Output function module；9) host computer calibration software module generates check value y3, is sent to analog output functional module；10) mould
Analog quantity output function module is according to check value y3 and combines by the calculated k of host computer, and b value exports analog signals；11) general-purpose
Table measures the output signal x3 of Ultrasonic Wave Flowmeter, and x3 is inputted host computer calibration software module；12) host computer is calibrated
Software module calculates trueness error, and is judged, if the precision that trueness error is able to satisfy Ultrasonic Wave Flowmeter is wanted
It asks, this calibration terminates, and re-execute the steps 1) if trueness error is unsatisfactory for required precision.
2. a kind of calibration method of Ultrasonic Wave Flowmeter analog output module according to claim 1, feature
It is, the analog output functional module of the Ultrasonic Wave Flowmeter exports 4-20mA current-mode analog quantity.
3. a kind of calibration method of Ultrasonic Wave Flowmeter analog output module according to claim 1, feature
It is, analog output theoretical value y1, y2 that the calibration software module generates is respectively that analog output functional module is defeated
25%, the 75% of maximum value out.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811544081.6A CN109506745A (en) | 2018-12-17 | 2018-12-17 | A kind of calibration method of Ultrasonic Wave Flowmeter analog output module |
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| CN201811544081.6A CN109506745A (en) | 2018-12-17 | 2018-12-17 | A kind of calibration method of Ultrasonic Wave Flowmeter analog output module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114942059A (en) * | 2022-04-09 | 2022-08-26 | 深圳天溯计量检测股份有限公司 | On-line flowmeter calibration method |
Citations (5)
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| CN102353918A (en) * | 2011-06-22 | 2012-02-15 | 德讯科技股份有限公司 | Automatic calibration system for current-voltage analog quantity collector |
| CN102997979A (en) * | 2012-12-27 | 2013-03-27 | 重庆川仪自动化股份有限公司 | Differential pressure flowmeter verification system |
| JP2014010789A (en) * | 2012-07-03 | 2014-01-20 | Mitsubishi Electric Corp | Automation device for calibration of manual operation unit |
| CN106680754A (en) * | 2017-01-16 | 2017-05-17 | 国网安徽省电力公司宣城供电公司 | Automatic calibration system and method of power source |
| CN108195447A (en) * | 2018-02-13 | 2018-06-22 | 无锡慧联流体技术有限公司 | flowmeter calibration system and calibration method |
-
2018
- 2018-12-17 CN CN201811544081.6A patent/CN109506745A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353918A (en) * | 2011-06-22 | 2012-02-15 | 德讯科技股份有限公司 | Automatic calibration system for current-voltage analog quantity collector |
| JP2014010789A (en) * | 2012-07-03 | 2014-01-20 | Mitsubishi Electric Corp | Automation device for calibration of manual operation unit |
| CN102997979A (en) * | 2012-12-27 | 2013-03-27 | 重庆川仪自动化股份有限公司 | Differential pressure flowmeter verification system |
| CN106680754A (en) * | 2017-01-16 | 2017-05-17 | 国网安徽省电力公司宣城供电公司 | Automatic calibration system and method of power source |
| CN108195447A (en) * | 2018-02-13 | 2018-06-22 | 无锡慧联流体技术有限公司 | flowmeter calibration system and calibration method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114942059A (en) * | 2022-04-09 | 2022-08-26 | 深圳天溯计量检测股份有限公司 | On-line flowmeter calibration method |
| CN114942059B (en) * | 2022-04-09 | 2022-11-25 | 深圳天溯计量检测股份有限公司 | On-line flowmeter calibration method |
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Application publication date: 20190322 |
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