CN1952624A - Self-calibration control system of water flow standard apparatus - Google Patents
Self-calibration control system of water flow standard apparatus Download PDFInfo
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- CN1952624A CN1952624A CN 200510047537 CN200510047537A CN1952624A CN 1952624 A CN1952624 A CN 1952624A CN 200510047537 CN200510047537 CN 200510047537 CN 200510047537 A CN200510047537 A CN 200510047537A CN 1952624 A CN1952624 A CN 1952624A
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Abstract
The invention provides an automatic verification control system of water flow standard apparatus. A computer is connected with a PLC which accomplishes the running of rating schedule, the acquisition of detecting data and the calculation of technical criterion, the computer obtains the data directly from the PLC with communication software and produces the monitoring displays with monitoring software, the embedded VBA of the monitoring software is combined with the monitoring software and the VisualBasic software to generate real time verification recordings, build background data base and inquire or print the real time verification recordings. The invention substitutes of the traditional verification mode of manual item-by-item filling and calculating, the lapse of artificial copy and calculation is diminished, but also the accuracy and authoritarian of detecting data is increased, the destination of simplicity of operation, advanced control, high accuracy detecting and low error ratio of the apparatus is reached.
Description
Technical field
The present invention relates to a kind of instrument calibration control system, especially a kind of self-calibration control system of water flow standard apparatus.
Background technology
Water flow standard apparatus is the standard set-up of tracer liquid flowmeter, mainly forms (as shown in Figure 3) by fluid circulation system, test pipeline, flow working stamndard (weighing container) experiment start and stop equipment and opertaing device etc.Its principle of work is: tested flowmeter is installed on the standard set-up, make flow of liquid through tested flowmeter and flow working stamndard (weighing container), tested flowmeter of synchronous operation and flow working stamndard (weighing container), the output stream value that compares both, thereby the accuracy of measuring and the repeatability of definite tested flowmeter.Calibration method mainly contains rest mass method and volumetric method, and wherein the rest mass method is the liquid quality in a period of time inner pressurd vessel of weighing under static state, thereby calculates flow.Requirement according to vertification regulation, the calibrating point of flowmeter is generally 25%, 40%, 60%, 80%, 100% 5 point of maximum flow, critical data in the calibrating: the one, gather the liquid quality in weighing a period of time inner pressurd vessel, the one, gather the flow of tested flowmeter, and carry out a large amount of numerous and diverse calculating and fill in the calibrating record according to detecting data.Control system in the past is old-fashioned relay, clinching, button, all operations all carries out on control box, the calibrating mode is unit control, manual unlocking stop valve during calibrating, regulate flow artificially behind certain value, manually read the indicating value of flowmeter, measure the height of water in the weighing container then, be converted into the volume unit flow, after a large amount of artificial calculating of vertification regulation process, the coefficient of calculating relative error, repeatability and the instrument of flowmeter, the outmoded backwardness of calibration method, detect a flowmeter, need multi agent cooperation just can finish.The more important thing is that data are inaccurate, the calibration accuracy of system is low because manually-operated, reading and calculating are easy to cause, be difficult to guarantee the precision of tested table, can't directly have influence on the quality and the economic benefit of enterprises of product for production provides the reliable technique data.
Summary of the invention
The object of the present invention is to provide a kind of self-calibration control system of water flow standard apparatus, make whole verification process, and in verification process, produce the calibrating record of real time data, the inquiry and the printing of also being convenient to examine and determine record simultaneously all by computer control.
The object of the present invention is achieved like this, and this self-calibration control system of water flow standard apparatus is mainly connected by a computing machine and a PLC.PLC finishes the operation of calibrating procedure, the collection that detects data, the calculating of technical indicator; Computing machine directly obtains data by bitcom from PLC, utilize monitoring software to make monitored picture, utilize the embedded VBA of monitoring software to combine, produce real-time calibrating record and set up background data base with monitoring software, VisualBasic software, and to examining and determine the inquiry and the printing of record.
Because said system configuration of the present invention, realize electrical control process, the collection that detects data, the calculating of technical indicator, the inquiry of calibrating record and the automatic control of printing by calibrating procedure, replaced the tradition calibrating mode of manually filling in item by item, calculating.So promptly to reduce the people be the error of copying, calculating, and improved the accuracy and the authority that detect data again, thereby realized simple to operately, and control is advanced, calibration accuracy height, the purpose that breakdown rate is low.
Description of drawings
Fig. 1 is a control system pie graph of the present invention;
Fig. 2 is a calibrating procedure process flow diagram of the present invention;
Fig. 3 is the water flow standard apparatus structural drawing.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, self-calibration control system of water flow standard apparatus of the present invention is mainly connected with AB-PLC by RS-232 interface by a computing machine.Utilize RSlogix500 software to make AB-PLC finish the operation of calibrating procedure, the collection that detects data, the calculating of technical indicator by programming; Computing machine directly obtains data by the RSlinx bitcom from PLC, utilize RSView32 monitoring software operation screen intuitively easy to make, technology picture, calibrating record picture, is convenient to operation and control.Developing instrument has adopted VisualBasic software, utilizes the embedded VBA of RSView32 software to combine with RSView32 software, produces real-time calibrating record and sets up background data base, convenient inquiry and printing to historical record.
As shown in Figure 2, calibrating procedure designs according to vertification regulation, can be divided into manually and automatic two kinds.Select PC manual, can realize single-set operation.Select PC automatic, the starting air compressor machine treats that the pressure of air compressor machine reaches 0.4MPa when above, by the calibrating line of choosing, the starting water pump is extracted into water on the water tower, when the liquid level of water tower reaches overflow situation, open stop valve by PLC control, the aperture of variable valve is adjusted to 90% o'clock of maximum flow, move 5 minutes, close variable valve and stop valve; Then the aperture of variable valve is adjusted to successively on 25%, 40%, 60%, 80%, 100% the calibrating point of maximum flow and examines and determine; Each calibrating point will be examined and determine three times, will gather the liquid quality in weighing a period of time inner pressurd vessel and the flow of tested flowmeter on each calibrating point.Then the data of gathering are carried out relevant calculating according to the requirement of vertification regulation, judge according to result of calculation whether flowmeter is qualified.After PLC sends the instruction that produces form, start the Event triggered function, when artificial input calibrating record number and Event triggered signal all possess, the VBA program is under the path of appointment, call the Excel form of the calibrating record of depositing in the background data base, the related data of quality weighing value, the flow of flowmeter, the relative error of indication, instrument coefficient, repeatability and the flowmeter of water in some flowmeters of every calibrating and the container is all write in the calibrating record dynamically, print the calibrating record and also will examine and determine recorded and stored in appointed positions.After all calibrating is finished, close variable valve and stop valve, finish the calibrating of flowmeter.
As shown in Figure 1, 2, because the demonstration of flowmeter is output as 4～20mA analog signals, so we select for use 16 8 tunnels analogy amount load module 1746-NI8 to gather the flow of flowmeter, obtain the real-time traffic of flowmeter.Be the flow accuracy of the flowmeter guaranteeing to collect, we drive valve and close the preceding flow of not gathering flowmeter in 10 seconds of valve at reversal valve, and adopt number one time every 1 second in the betweentimes, average then as the flow of flowmeter.
As shown in Figure 1, for guaranteeing calibration accuracy, the liquid quality of gathering in weighing a period of time inner pressurd vessel is to utilize 1747-SN module and the weighting display instrument that is connected on the container to realize.Method is to have designed a RS-232 interface on weighting display instrument, in weighting display instrument, configure interface, baud rate, be connected on the scan module of PLC by communication cable then, carrying out corresponding baud rate in scan module sets, scan module just is presented at the weighing value of weighting display instrument on its address like this, PLC reads the weighing value of weighting display instrument in the address of appointment, has finished the collection of the quality of water in the container.
Operating system of the present invention adopts Windows2000, and purpose is to be convenient to produce in monitoring software form.
System configuration of the present invention is as follows:
| Sequence number | Device name | Specification | Unit | Quantity |
| 1 | The PLC main frame | 1747-L542C | Cover | 1 |
| 2 | Load module | 1746-IB16 | Individual | 1 |
| 3 | Output module | 1746-OW16 | Individual | 1 |
| 4 | The analog quantity load module | 1746-NI8 | Individual | 2 |
| 5 | Analog output module | 1746-NO4I | Individual | 2 |
| 6 | Scan module | 1747-SN | Individual | 1 |
| 7 | Programming software | RSLogix500 | Cover | 1 |
| 8 | Monitoring software | RSView32 (containing Linx) | Cover | 1 |
System configuration of the present invention is not to be confined to concrete equipment as listed above, can adopt the miscellaneous equipment close with equipment performance as listed above to carry out system configuration yet.
Claims (6)
1. self-calibration control system of water flow standard apparatus, it is characterized in that connecting by a computing machine and a PLC, PLC finishes calibrating procedure operation, the collection that detects data, the calculating of technical indicator, computing machine directly obtains data by bitcom from PLC, utilize monitoring software to make monitored picture, utilize the embedded VBA of monitoring software to combine with monitoring software, VisualBasic software, produce real-time calibrating record and set up background data base, and to examining and determine the inquiry and the printing of record.
2. self-calibration control system of water flow standard apparatus according to claim 1, it is characterized in that described PLC is AB-PLC, connect with a computing machine by RS-232 interface, computing machine directly obtains data by the RSlinx bitcom from PLC, the monitoring software of computing machine adopts RSView32, and the PLC programming software is RSlogix500.
3. self-calibration control system of water flow standard apparatus according to claim 1 and 2 is characterized in that the detection data of gathering comprise the liquid quality in the container and the flow of flowmeter.
4. self-calibration control system of water flow standard apparatus according to claim 3, the acquisition method that it is characterized in that the liquid quality in the container is to have designed a RS-232 interface on weighting display instrument, in weighting display instrument, configure interface, baud rate, be connected on the scan module of PLC by communication cable then, carrying out corresponding baud rate in scan module sets, scan module just is presented at the weighing value of weighting display instrument on its address like this, and PLC reads the weighing value of weighting display instrument in the address of appointment.
5. self-calibration control system of water flow standard apparatus according to claim 3 is characterized in that the flow of flowmeter is gathered by selecting 16 analog quantity load module 1746-NI8 for use, obtains the real-time traffic of flowmeter.
6. self-calibration control system of water flow standard apparatus according to claim 1 and 2 is characterized in that monitored picture comprises operation screen, technology picture, calibrating record picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510047537 CN1952624A (en) | 2005-10-20 | 2005-10-20 | Self-calibration control system of water flow standard apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510047537 CN1952624A (en) | 2005-10-20 | 2005-10-20 | Self-calibration control system of water flow standard apparatus |
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| Publication Number | Publication Date |
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| CN1952624A true CN1952624A (en) | 2007-04-25 |
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| CN 200510047537 Pending CN1952624A (en) | 2005-10-20 | 2005-10-20 | Self-calibration control system of water flow standard apparatus |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294841B (en) * | 2008-04-10 | 2010-06-02 | 上海大学 | Automatic detecting device and method for measuring tank |
| CN103063276A (en) * | 2012-12-27 | 2013-04-24 | 重庆川仪自动化股份有限公司 | Electromagnetic flowmeter verification system |
| CN103743455A (en) * | 2013-12-31 | 2014-04-23 | 广西玉柴机器股份有限公司 | Mass flowmeter detecting device and detecting method |
| CN104154972A (en) * | 2014-08-01 | 2014-11-19 | 中国计量学院 | Flow calibration facility for ultrasonic water meters |
| CN106768207A (en) * | 2017-01-17 | 2017-05-31 | 北京远东仪表有限公司 | A kind of weighing system for water flow device |
| CN108254169A (en) * | 2017-12-28 | 2018-07-06 | 珠海昊星自动化系统有限公司 | A kind of venturi air-valve automated testing method and system |
-
2005
- 2005-10-20 CN CN 200510047537 patent/CN1952624A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294841B (en) * | 2008-04-10 | 2010-06-02 | 上海大学 | Automatic detecting device and method for measuring tank |
| CN103063276A (en) * | 2012-12-27 | 2013-04-24 | 重庆川仪自动化股份有限公司 | Electromagnetic flowmeter verification system |
| CN103743455A (en) * | 2013-12-31 | 2014-04-23 | 广西玉柴机器股份有限公司 | Mass flowmeter detecting device and detecting method |
| CN103743455B (en) * | 2013-12-31 | 2016-06-29 | 广西玉柴机器股份有限公司 | Calibrating apparatus of quality flowmeter and calibration method |
| CN104154972A (en) * | 2014-08-01 | 2014-11-19 | 中国计量学院 | Flow calibration facility for ultrasonic water meters |
| CN104154972B (en) * | 2014-08-01 | 2017-07-11 | 中国计量学院 | ultrasonic water meter flow standard device |
| CN106768207A (en) * | 2017-01-17 | 2017-05-31 | 北京远东仪表有限公司 | A kind of weighing system for water flow device |
| CN108254169A (en) * | 2017-12-28 | 2018-07-06 | 珠海昊星自动化系统有限公司 | A kind of venturi air-valve automated testing method and system |
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