CN104697616A - Industrial fuel gas quality measurement device and method based on LabVIEW - Google Patents
Industrial fuel gas quality measurement device and method based on LabVIEW Download PDFInfo
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- CN104697616A CN104697616A CN201510156135.1A CN201510156135A CN104697616A CN 104697616 A CN104697616 A CN 104697616A CN 201510156135 A CN201510156135 A CN 201510156135A CN 104697616 A CN104697616 A CN 104697616A
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Abstract
The invention discloses an industrial fuel gas quality measurement device based on LabVIEW. The industrial fuel gas quality measurement device based on LabVIEW comprises one or more measurement units, wherein the measurement units are installed on pipelines respectively. Each measurement unit comprises a pressure transmitter, a temperature transmitter and a vortex shedding flowmeter, wherein the pressure transmitter and the temperature transmitter are connected with a boss on the corresponding pipeline through threads respectively, the vortex shedding flowmeter is connected with the corresponding pipeline through a flange, the pressure transmitter, the temperature transmitter and the vortex shedding flowmeter transmit acquired data to a data acquisition card, the data acquisition card transmits the data to a converter so that data conversion can be conducted, and data converted by the converter are transmitted to an upper computer so as to be calculated, displayed and stored. The invention further provides an industrial fuel gas quality measurement method based on LabVIEW. According to the device and method, the quality of consumed liquid gas can be measured automatically and accurately.
Description
Technical field
The present invention relates to a kind of industrial fuel gas apparatus for measuring quality based on LabVIEW and method.
Background technology
The industrial combustion gas such as oxygen, propane that plant area uses is by Cemented filling extremely each workshop after being vaporized by liquid gas.Want to know for sure the quality of consumed liquid gas, can have two schemes.Liquid gas storage tank directly measured by one clock; Another kind is temperature pressure and the flow of measuring flowing gas in pipeline, quality when going out liquid state according to formula scales.The first solution technique requires very high, poor operability, not only needs to drop into the quality that a large amount of equipment just can draw consumption, waste of manpower, material resources, financial resources, and accuracy of measurement is poor.What first scheme adopted is indirect inspection, and the program adopts the pressure of gas in the measuring apparatus measuring channel on market, temperature and flow.But there is following problem in this indirect measurement method:
1, computing formula is inaccurate, and precision is not high
Consumption when really needing industrial combustion gas liquid for user, testing staff can only hand-writtenly by the gaseous state amount measured calculate, because prediction equation is inaccurate, so precision also reduces greatly;
2, need manual record, cost is high
Major part plant area adopts human at periodic intervals to record the mode of numerical value to preserve the consumption that papery data probably could know liquid gas, therefore needs to drop into artificial in a large number, waste of manpower, material resources, financial resources;
3, function singleness
Measuring apparatus on existing market usually can only be simple the collection realizing certain physical quantity and display, if desired check the measurement result of section sometime or require to report in table form, these measuring apparatus all cannot realize scene and check and automatic reporting functions.
Therefore, we are necessary a kind of new measurement mechanism of design and method, to reach the liquid gas quality that Measurement accuracy consumes.
Summary of the invention
The object of the present invention is to provide a kind of industrial fuel gas apparatus for measuring quality based on LabVIEW and method, this apparatus and method can automatically, the liquid gas quality that consumes of Measurement accuracy.
The present invention is achieved in that
Based on an industrial fuel gas mass measuring method of LabVIEW, comprise the steps:
Step one, on each root pipeline, make a call to 2 holes, each eyelet welding connects a boss, and the first boss is connected with pressure unit, and the second boss is connected with temperature transmitter; Vortex shedding flow meter is connected with pipeline by flange;
Step 2, pressure unit, temperature transmitter, vortex shedding flow meter are connected with data collecting card, data collecting card is connected with host computer by converter;
The pressure of the industrial fuel gas of collection, temperature, volume are passed to data collecting card by step 3, pressure unit, temperature transmitter, vortex shedding flow meter, these data are passed to converter and carry out data conversion by data collecting card, and the data after converter conversion pass to host computer and carry out data processing, data display, data storage;
In step 3, host computer carries out data processing, data show, the method for data storage is:
Step (one) take LabVIEW as platform, brings the pressure of the industrial fuel gas of pressure unit, temperature transmitter, vortex shedding flow meter collection, temperature, volume into draw industrial fuel gas in formula (1) gas consumption mass M,
In formula, M is the gas consumption quality of industrial fuel gas,
ρ is the density of industrial fuel gas,
P
1gas pressure intensity under-standard state,
V
1gas volume under-standard state,
T
1the thermodynamic temperature of gas under-standard state, unit is K,
P
tablegas pressure intensity under the actual conditions that-pressure unit is measured,
V
tablegas volume under the actual conditions that-flux of vortex street measures,
T
tablethe temperature of gas under the virtual condition that-temperature transmitter is measured, unit is DEG C;
Step (two), is presented on the display screen of host computer by the gas consumption mass M of industrial fuel gas;
Step (three), gas pressure intensity P under the actual conditions that the gas consumption mass M of industrial fuel gas, pressure unit are measured
table, gas volume V under the actual conditions that measure of flux of vortex street
table, the temperature T of gas under the virtual condition measured of temperature transmitter
tablecarry out data to store and generating report forms.
Further scheme is: the first boss adopts with pressure unit and is threaded, and the second boss adopts with temperature transmitter and is threaded.
The present invention also provides a kind of industrial fuel gas apparatus for measuring quality based on LabVIEW, and it comprises more than one measuring unit, and described measuring unit is installed on pipeline respectively; Described measuring unit comprises pressure unit, temperature transmitter, vortex shedding flow meter, and described pressure unit is connected with the boss on pipeline respectively by screw thread with temperature transmitter, and described vortex shedding flow meter is connected with pipeline by flange;
The data of collection are passed to data collecting card by described pressure unit, temperature transmitter, vortex shedding flow meter, data are passed to converter and carry out data conversion by data collecting card, pass to host computer carry out calculating, show, store through converter translated data.
Further scheme is: described measuring unit has 8.
Further scheme is: the hole on described boss and pipeline is welded to connect.
Further scheme is: described data collecting card is connected with converter by RS485 data line, and described converter is connected with host computer by RS485 data line or USB data line.
The present invention also provides a kind of industrial fuel gas apparatus for measuring quality based on LabVIEW, and it comprises:
Take LabVIEW as platform, the pressure of the industrial fuel gas of pressure unit, temperature transmitter, vortex shedding flow meter collection, temperature, volume are brought into the computing module of the gas consumption mass M drawing industrial fuel gas in formula (1);
In formula, M is the gas consumption quality of industrial fuel gas,
ρ is the density of industrial fuel gas,
P
1gas pressure intensity under-standard state,
V
1gas volume under-standard state,
T
1the thermodynamic temperature of gas under-standard state, unit is K,
P
tablegas pressure intensity under the actual conditions that-pressure unit is measured,
V
tablegas volume under the actual conditions that-flux of vortex street measures,
T
tablethe temperature of gas under the virtual condition that-temperature transmitter is measured, unit is DEG C;
The gas consumption mass M of industrial fuel gas is presented at display module on host computer display screen;
Gas pressure intensity P under the actual conditions that the gas consumption mass M of industrial fuel gas, pressure unit are measured
table, gas volume V under the actual conditions that measure of flux of vortex street
table, the temperature T of gas under the virtual condition measured of temperature transmitter
tablecarry out data to store and the memory module of generating report forms and report generation module.
The present invention mainly by the law of conservation of mass of liquid gas and gaseous atmospheres, by calculating the quality of gaseous state thus obtaining liquid quality.First, with numerical value such as the pressure of existing measurement mechanism measurement gas in pipeline, temperature, density.Then, develop a set of industrial fuel gas apparatus for measuring quality using LabVIEW as development platform, thus reach the use amount of Real-Time Monitoring each workshop gas, draw the consumption of industrial liquid gas, and according to user's request generating report forms.The present invention utilizes the collection of I/O interfacing equipment settling signal, measures and conditioning; The computing of the functional realiey signal data utilizing computing machine powerful, treatment and analysis; Utilize the Presentation Function of graphoscope, express Output rusults in a variety of forms.
The invention has the beneficial effects as follows:
The present invention utilizes temperature in pipeline, pressure and gas flow to carry out automatically converting consuming the quality of liquid gas, successfully solves computing formula indefinite, the problem that precision is not high;
The present invention can realize continuous monitoring to flowing gas in pipeline and display, and solving gas parameter needs manual record, the problem that cost increases;
User can generating report forms according to demand, and form can carry out chart display, measurement data is stored, so that later reference, reduces person works's intensity, decreases cost;
The present invention, by punching on pipeline, makes boss and hole be welded to connect, and boss and pressure unit, temperature transmitter is threaded connection, and not only measures accurately, and makes installation, convenient disassembly.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the industrial fuel gas apparatus for measuring quality that the present invention is based on LabVIEW;
Fig. 2 is the structural representation of the industrial fuel gas apparatus for measuring quality that the present invention is based on LabVIEW;
Fig. 3 is user interface.
Fig. 4 is the chart of report generation CMOS macro cell.
In figure: 1, pressure unit, 2, temperature transmitter, 3, vortex shedding flow meter, the 4, first boss, the 5, second boss, 6, flange, 7, pipeline, 8, data collecting card, 9, converter, 10, host computer.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
See Fig. 1, Fig. 2, a kind of industrial fuel gas apparatus for measuring quality based on LabVIEW, it comprises more than one measuring unit, and described measuring unit is installed in (a corresponding measuring unit of pipeline 7) on pipeline 7 respectively; Described measuring unit comprises pressure unit 1, temperature transmitter 2, vortex shedding flow meter 3, described pressure unit 1 is connected with the first boss 4 on pipeline 7 by screw thread, described temperature transmitter 2 is connected with the second boss 5 on pipeline 7 by screw thread, and described vortex shedding flow meter 3 is connected with pipeline 7 by flange 6;
The data of collection are passed to data collecting card 8 by described pressure unit 1, temperature transmitter 2, vortex shedding flow meter 3, data are passed to converter 9 by RS485 data line and carry out data conversion by data collecting card 8, pass to host computer 10 (PC) carry out calculating, show, store through converter 9 translated data by USB data line.
In order to ensure the accuracy measured: the hole on the first boss 4 and the second boss and pipeline 7 is welded to connect.
In order to the precision measured, the CH301 type temperature transmitter that Shang Run exact instrument company limited can be adopted to produce, WP-LU type vortex shedding flow meter and WIDE PLUS-8 pressure unit; The USB-7660 type data collecting card that data collecting card adopts Beijing Zhong Taiyanchuan Science and Technology Ltd. to produce.
In the preferred embodiment, 8 measuring units can be used to measure (namely adopting 24 sensors) 8 pipelines respectively, user inputs the density of tested gas in the user interface of host computer, just can automatically calculate the quality demonstrating consumed liquid gas.
The present invention also provides a kind of industrial fuel gas mass measuring method based on LabVIEW, comprises the steps:
Step one, on each root pipeline, make a call to 2 holes, each eyelet welding connects a boss, and the first boss is connected with pressure unit, and the second boss is connected with temperature transmitter; Vortex shedding flow meter is connected with pipeline by flange;
Step 2, pressure unit, temperature transmitter, vortex shedding flow meter are connected with data collecting card (first pressure unit, temperature transmitter, vortex shedding flow meter carry out wire jumper setting to data collecting card before being connected with data collecting card), data collecting card is connected with host computer by converter;
The pressure of the industrial fuel gas of collection, temperature, volume are passed to data collecting card by step 3, pressure unit, temperature transmitter, vortex shedding flow meter, these data are passed to converter and carry out data conversion by data collecting card, and the data after converter conversion pass to host computer and carry out data processing, data display, data storage;
In step 3, host computer carries out data processing, data show, the method for data storage is:
Step (one) take LabVIEW as platform, brings the pressure of the industrial fuel gas of pressure unit, temperature transmitter, vortex shedding flow meter collection, temperature, volume into draw industrial fuel gas in formula (1) gas consumption mass M,
In formula, the gas consumption quality of M-industrial fuel gas,
The density of ρ-industrial fuel gas,
P
1gas pressure intensity under-standard state,
V
1gas volume under-standard state,
T
1the thermodynamic temperature of gas under-standard state, unit is K,
P
tablegas pressure intensity under the actual conditions that-pressure unit is measured,
V
tablegas volume under the actual conditions that-flux of vortex street measures,
T
tablethe temperature of gas under the virtual condition that-temperature transmitter is measured, unit is DEG C;
Step (two), is presented on the display screen of host computer by the gas consumption mass M of industrial fuel gas;
Step (three), gas pressure intensity P under the actual conditions that the gas consumption mass M of industrial fuel gas, pressure unit are measured
table, gas volume V under the actual conditions that measure of flux of vortex street
table, the temperature T of gas under the virtual condition measured of temperature transmitter
tablecarry out data to store and generating report forms.
In order to mount and dismount conveniently, the first boss can be adopted with pressure unit and be threaded, the second boss adopts with temperature transmitter and is threaded.
This method is according to gas-liquid reduction formula, and the data operation utilizing LabVIEW to provide selects version, founding mathematical models, and is presented on the front panel (user interface) of host computer by scaling results, see Fig. 3 in real time.
Below, the derivation of gas-liquid reduction formula in the present invention is described in further detail:
Known by the Ideal-Gas Equation, PV=nRT
Wherein, P-ideal gas pressure,
V-ideal gas volume,
The amount of n-gaseous matter,
The thermodynamic temperature of T-ideal gas,
R-ideal gas constant.
Can obtain,
Wherein, P
1gas pressure intensity under-standard state,
V
1gas volume under-standard state,
T
1the thermodynamic temperature of gas under-standard state, unit is K,
P
tablegas pressure intensity under the actual conditions that-pressure unit is measured,
V
tablegas volume under the actual conditions that-flux of vortex street measures,
T
tablethe temperature of gas under the virtual condition that-temperature transmitter is measured, unit is DEG C.
Due to, T under standard state
1=273.5 (K), P
1=101325 (Pa), arrangement can obtain gas volume under standard state:
According to mass conservation principle, the gaseous mass under known standard state is equal with the gaseous mass under actual conditions.Density r due to industrial fuel gas under standard state can look into standard and obtain, so the computing formula that can obtain consumed liquid gas quality is
For industrial oxygen, the density r=1.4289 (kg/m of oxygen under known standard state
3), the consumption mass M of liquid oxygen can be obtained,
The present invention also provides a kind of industrial fuel gas apparatus for measuring quality based on LabVIEW, and it comprises:
Take LabVIEW as platform, the pressure of the industrial fuel gas of pressure unit, temperature transmitter, vortex shedding flow meter collection, temperature, volume are brought into the computing module of the gas consumption mass M drawing industrial fuel gas in formula (1);
In formula, the gas consumption quality of M-industrial fuel gas,
The density of ρ-industrial fuel gas,
P
1gas pressure intensity under-standard state,
V
1gas volume under-standard state,
T
1the thermodynamic temperature of gas under-standard state, unit is K,
P
tablegas pressure intensity under the actual conditions that-pressure unit is measured,
V
tablegas volume under the actual conditions that-flux of vortex street measures,
T
tablethe temperature of gas under the virtual condition that-temperature transmitter is measured, unit is DEG C;
The gas consumption mass M of industrial fuel gas is presented at display module on host computer display screen;
Gas pressure intensity P under the actual conditions that the gas consumption mass M of industrial fuel gas, pressure unit are measured
table, gas volume V under the actual conditions that measure of flux of vortex street
table, the temperature T of gas under the virtual condition measured of temperature transmitter
tablecarry out data to store and the memory module of generating report forms and report generation module, to facilitate user's unified management data.
First report generation module is report making template, with MS Office Software for Design statement form, then programmes in LabVIEW platform, according to user's request generating report forms, see Fig. 4.
LabVIEW platform in the present invention provides powerful VISA (virtual instrument software architecture) storehouse, VISA, as the bottom functional module of driver module intercommunication in LabVIEW, can connect the I/O equipment of various criterion.Under the sub-VI of serial communication of LabVIEW 2013 is present in " LabVIEW2013 examples instr smplsErL.llb " path, file is called " Basic Serial Write and Read.VI ".LabVIEW platform configuration serial ports initialization, sends and receives data, translates data formats and data processing and display.
The present invention both can ensure the accuracy measured, and can greatly reduce measurement cost again.
Claims (7)
1., based on an industrial fuel gas mass measuring method of LabVIEW, it is characterized in that described method comprises the steps:
Step one, on each root pipeline, make a call to 2 holes, each eyelet welding connects a boss, and the first boss is connected with pressure unit, and the second boss is connected with temperature transmitter; Vortex shedding flow meter is connected with pipeline by flange;
Step 2, pressure unit, temperature transmitter, vortex shedding flow meter are connected with data collecting card, data collecting card is connected with host computer by converter;
The pressure of the industrial fuel gas of collection, temperature, volume are passed to data collecting card by step 3, pressure unit, temperature transmitter, vortex shedding flow meter, these data are passed to converter and carry out data conversion by data collecting card, and the data after converter conversion pass to host computer and carry out data processing, data display, data storage;
In step 3, host computer carries out data processing, data show, the method for data storage is:
Step (one) take LabVIEW as platform, brings the pressure of the industrial fuel gas of pressure unit, temperature transmitter, vortex shedding flow meter collection, temperature, volume into draw industrial fuel gas in formula (1) gas consumption mass M,
In formula, M is the gas consumption quality of industrial fuel gas,
ρ is the density of industrial fuel gas,
P
1for gas pressure intensity under standard state,
V
1for gas volume under standard state,
T
1for the thermodynamic temperature of gas under standard state, unit is K,
P
tablefor gas pressure intensity under the actual conditions that pressure unit is measured,
V
tablefor gas volume under the actual conditions that flux of vortex street measures,
T
tablefor the temperature of gas under the virtual condition that temperature transmitter is measured, unit is DEG C;
Step (two), is presented on the display screen of host computer by the gas consumption mass M of industrial fuel gas;
Step (three), gas pressure intensity P under the actual conditions that the gas consumption mass M of industrial fuel gas, pressure unit are measured
table, gas volume V under the actual conditions that measure of flux of vortex street
table, the temperature T of gas under the virtual condition measured of temperature transmitter
tablecarry out data to store and generating report forms.
2., as claimed in claim 1 based on the industrial fuel gas mass measuring method of LabVIEW, it is characterized in that: the first boss adopts with pressure unit and is threaded, the second boss adopts with temperature transmitter and is threaded.
3. as described in as arbitrary in claim 1-2 based on the industrial fuel gas mass measuring method of LabVIEW the device that uses, it is characterized in that: it comprises more than one measuring unit, described measuring unit is installed on pipeline respectively; Described measuring unit comprises pressure unit, temperature transmitter, vortex shedding flow meter, it is characterized in that: described pressure unit is connected with the boss on pipeline respectively by screw thread with temperature transmitter, and described vortex shedding flow meter is connected with pipeline by flange;
The data of collection are passed to data collecting card by described pressure unit, temperature transmitter, vortex shedding flow meter, data are passed to converter and carry out data conversion by data collecting card, pass to host computer carry out calculating, show, store through converter translated data.
4. device as claimed in claim 3, is characterized in that: described measuring unit has 8.
5. device as claimed in claim 3, is characterized in that: the hole on described boss and pipeline is welded to connect.
6. device as claimed in claim 3, it is characterized in that: described data collecting card is connected with converter by RS485 data line, described converter is connected with host computer by RS485 data line or USB data line.
7., based on an industrial fuel gas apparatus for measuring quality of LabVIEW, it is characterized in that it comprises:
Take LabVIEW as platform, the pressure of the industrial fuel gas of pressure unit, temperature transmitter, vortex shedding flow meter collection, temperature, volume are brought into the computing module of the gas consumption mass M drawing industrial fuel gas in formula (1);
In formula, M is the gas consumption quality of industrial fuel gas,
ρ is the density of industrial fuel gas,
P
1for gas pressure intensity under standard state,
V
1for gas volume under standard state,
T
1for the thermodynamic temperature of gas under standard state, unit is K,
P
tablefor gas pressure intensity under the actual conditions that pressure unit is measured,
V
tablefor gas volume under the actual conditions that flux of vortex street measures,
T
tablefor the temperature of gas under the virtual condition that temperature transmitter is measured, unit is DEG C;
The gas consumption mass M of industrial fuel gas is presented at display module on host computer display screen;
Gas pressure intensity P under the actual conditions that the gas consumption mass M of industrial fuel gas, pressure unit are measured
table, gas volume V under the actual conditions that measure of flux of vortex street
table, the temperature T of gas under the virtual condition measured of temperature transmitter
tablecarry out data to store and the memory module of generating report forms and report generation module.
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|---|---|---|---|
| CN201510156135.1A CN104697616A (en) | 2015-04-03 | 2015-04-03 | Industrial fuel gas quality measurement device and method based on LabVIEW |
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ID=53344981
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| CN105890727A (en) * | 2016-04-22 | 2016-08-24 | 成都瑞途电子有限公司 | Weighing equipment |
| CN105890724A (en) * | 2016-04-22 | 2016-08-24 | 成都瑞途电子有限公司 | Material metering information acquisition apparatus |
| CN105928595A (en) * | 2016-04-22 | 2016-09-07 | 成都瑞途电子有限公司 | Weighing signal acquisition method |
| CN108896142A (en) * | 2018-05-08 | 2018-11-27 | 北京机科国创轻量化科学研究院有限公司 | weighing mechanism and weighing method |
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