CN1609918A - System integrated process control and communication experiment system - Google Patents
System integrated process control and communication experiment system Download PDFInfo
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- CN1609918A CN1609918A CN 200410084393 CN200410084393A CN1609918A CN 1609918 A CN1609918 A CN 1609918A CN 200410084393 CN200410084393 CN 200410084393 CN 200410084393 A CN200410084393 A CN 200410084393A CN 1609918 A CN1609918 A CN 1609918A
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Abstract
The present invention discloses system integrating process control and communication experiment system. It has one integrated object parameter system including three controlled objects of liquid level-flow rate process controller, temperature-flow rate process controller and pressure process controller, and four controlled parameters of liquid level, flow rate, temperature and pressure; and one integrated control mode system including four control modes of instrument control, PLC control, computer control and virtual instrument control. The four controlled parameter signals of three controlled objects are measured with different transducers, A/D converted and fed separately to different control systems, and through integration in the upper computer, the signals are fed to data communication module to realize lab LAN communication and data transmission and communication with any client side via network. The present invention may be expanded.
Description
Technical field
The present invention relates to a kind of system integration process control and communication experiment system, true experiment device technical field.
Background technology
This experimental system is a cover experimental system of specializing in for robotization specialty, electric information class specialty and computer utility.More than these specialties belong to Engineering specialties, the engineering application is stronger, when study Automatic Control Theory and process control course, must carry out the experiment and the engineering training of process control.But some problems below in education experiment, existing at present:
1. the current experiments device all is independent device one by one, and the complication system in contact and the actual engineering does not differ far away each other.
2. the control device of some experimental provisions is single, still is controlled to be the master with instrument, and very few to computer control and virtual instrument control application, the various control means can both realize that control does not also have at present.
3. generally only offer experiment for the process control course, and can not be with the experiment chiasmate of process control, the communication technology, Computer Control Technology and the multi-door course of network technology, therefore experiment is relatively simple.
4. the new technology application is less, comprises virtual instrument technique, communication and network technology and system integration technology etc.
Summary of the invention:
The objective of the invention is provides a kind of employing system integration technology, the integrated and communication system of Process Control System of communication and network technology in order to overcome the technical disadvantages in this curriculum experiment at present.
Technical scheme characteristics of the present invention are: it is formed in an image parameter integrated system by liquid level-discharge process control device, temperature-discharge process control device, three controlled devices of press process control device and liquid level, flow, temperature, four kinds of controlled parameter sets of pressure and develops into instrument control, PLC control, computer control, virtual instrument by single control mode and control four kinds of control modes and be integrated in a control mode integrated system; Four kinds of controlled parameters of liquid level, temperature, three controlled devices of pressure record signal by different transmitters and be sent to four kinds of mode control system respectively after the A/D conversions, after host computer is integrated, send into data communication module, realization lab lan communication, and realize data transmission and communicate by letter by network or public telephone network.
Three above-mentioned controlled devices are various control patterns such as one-tenth single order capable of being combined, second order, serial connection, ratio respectively.The actual parameter of controlling object is sent into data acquisition module by transmitters sense, the signal that records, the data processing modules such as Signal Separation that digital signal after the A/D conversion can send digital regulated instrument, PLC controller, computing machine or virtual instrument to carry out digital filtering, multiple input path respectively carry out data processing, signal after treatment carries out the control algolithm computing, output signal after the computing is after the D/A conversion, convert air pressure signal to through current to pneumatic converter and promote operated pneumatic valve, with controlled parameter adjustment to desired value.This signal is imported host computer through data exchange unit simultaneously.Carry out integrated processing after the host computer received signal, the integrated demonstration on display screen of integrated back signal; And signal sent into data communication module, utilize dedicated network or public telephone network and client to communicate; Integrated back signal is handled, required to send the change setting value, change pid parameter, change signals such as control mode, feed back to controller through data exchange unit again according to the operator.
Because the present invention has used system integration new technology, make control mode develop into instrument control, PLC control, computer control, four kinds of control mode integrated systems that control mode is integrated of virtual instrument control by single control mode; And the single control system of a table apparatus is integrated into liquid level-flow, temperature-flow, three kinds of process controllers of pressure, the image parameter integrated system of liquid level, flow, temperature, four kinds of controlled parameters of pressure.Each control system of disperseing is integrated into a big system.The present invention used the Networks and Communications technology utilize network or pay station line realized with the data transmission of any one client with communicate by letter, also can it be expanded to a plurality of terminals by network, enlarge utilization factor and effect that the experiment number improves experimental system.
Description of drawings
Fig. 1 is system integration process control and communication experiment system figure.
Embodiment
By shown in Figure 1, the present invention it by liquid level-discharge process control device, temperature-discharge process control device, three controlled devices of press process control device, liquid level, flow, four kinds of controlled parameter sets of temperature, pressure are formed in the image parameter integrated system of a system and develop into instrument control, PLC control, computer control, virtual instrument by single control mode and control the control mode integrated system that four kinds of control modes are integrated in a system.Three above-mentioned controlled devices are various control models such as one-tenth single order capable of being combined, second order, serial connection, ratio respectively.The actual parameter of controlling object is sent into data acquisition module by transmitters sense, the signal that records, the data processing modules such as Signal Separation that digital signal after the A/D conversion can send digital regulated instrument, PLC controller, computing machine or virtual instrument to carry out digital filtering, multiple input path respectively carry out data processing, signal after treatment carries out the control algolithm computing, output signal after the computing is after the D/A conversion, convert air pressure signal to through current to pneumatic converter and promote operated pneumatic valve, with controlled parameter adjustment to desired value.This signal is imported host computer through data exchange unit simultaneously.Carry out integrated processing after the host computer received signal, the integrated demonstration on display screen of integrated back signal; And signal sent into data communication module, utilize dedicated network or public telephone network and client to communicate; Integrated back signal is handled, required to send the change setting value, change pid parameter, change signals such as control mode, feed back to controller through data exchange unit again according to the operator.
This experimental system is further described, and it is made up of 9 parts, and it is composed as follows:
1. liquid level---volume control device comprises:
The upper and lower tank of liquid level, spinner-type flowmeter, diffused silicon pressure transmitter, pneumatic control valve, reduction valve, current to pneumatic converter, water circulating pump, electric voltage/frequency converter.
2. temperature---volume control device comprises:
Inside and outside sleeve formula water heater, spinner-type flowmeter, thermal resistance thermometer, pneumatic control valve, reduction valve, current to pneumatic converter, water circulating pump, temperature transmitter, electric voltage/frequency converter, controllable silicon electric power regulating circuit.
3. pressure control device comprises:
Large and small pressure vessel, diffused silicon pressure transmitter, air operated controller, reduction valve, current to pneumatic converter.
4. blind controller system comprises:
The single loop digital governer, serial connection digital governer, A/D, D/A converter.
5.PLC (Programmable Logic Controller) control system comprises:
The PLC controller, A/D, D/A module, analog quantity control module, communication module, order wire, computing machine, PLC Control Software.
6. computer control system comprises:
A/D, D/A module, computing machine, computer control software, computing machine configuration software.
7. the virtual instrument control system comprises:
Data acquisition module comprises data processing module, the control algolithm module that comprises conventional PID, integral separation PID algorithm and host computer communication module that multiple input path data separating, digital filtering are handled.
8. system integration master system comprises:
Industry control system, data exchange unit, configuration software, data processing software, each system's software for display, communication software, network control software.
9. data communication module comprises:
Communication interface, network control software.
The present invention can finish following experimentalists and technicians:
1. instrument is controlled experimentalists and technicians:
(1) single loop liquid level single order, second order instrument control experiment;
(2) single loop flow instrument control experiment;
(3) liquid level---liquid level tandem instrument control experiment;
(4) liquid level---flow tandem instrument control experiment;
(5) flow proportional blind controller system;
(6) single loop temperature single order, second order instrument control experiment;
(7) temperature---temperature serial connection instrument control experiment;
(8) temperature---flow serial connection instrument control experiment;
(9) single loop pressure single order, second order instrument control experiment;
(10) pressure---pressure serial connection instrument control experiment;
2.PLC control experimentalists and technicians:
(1) single loop liquid level single order, second order PLC control experiment;
(2) single loop flow PLC control experiment;
(3) liquid level---liquid level tandem PLC controls experiment;
(4) liquid level---flow tandem PLC controls experiment;
(5) flow proportional PLC control system;
(6) single loop temperature single order, second order PLC control experiment;
(7) temperature---temperature serial connection PLC control experiment;
(8) temperature---flow serial connection PLC control experiment;
(9) single loop pressure single order, second order PLC control experiment;
(10) pressure---pressure serial connection PLC control experiment;
3. Experiment of Computer Control Technology series:
(1) single loop liquid level single order, second order Experiment of Computer Control Technology;
(2) single loop flow computer control experiment;
(3) liquid level---liquid level tandem Experiment of Computer Control Technology;
(4) liquid level---flow tandem Experiment of Computer Control Technology;
(5) flow proportional computer control system;
(6) single loop temperature single order, second order Experiment of Computer Control Technology;
(7) temperature---temperature serial connection Experiment of Computer Control Technology;
(8) temperature---flow serial connection Experiment of Computer Control Technology;
(9) single loop pressure single order, second order Experiment of Computer Control Technology;
(10) pressure---pressure serial connection Experiment of Computer Control Technology;
4. virtual instrument is controlled experimentalists and technicians:
(1) single loop liquid level single order, second order virtual instrument control experiment;
(2) single loop flow virtual instrument control experiment;
(3) liquid level---liquid level tandem virtual instrument control experiment;
(4) liquid level---flow tandem virtual instrument control experiment;
(5) flow proportional virtual instrument control system;
(6) single loop temperature single order, second order virtual instrument control experiment;
(7) temperature---temperature serial connection virtual instrument control experiment;
(8) temperature---flow serial connection virtual instrument control experiment;
(9) single loop pressure single order, second order virtual instrument control experiment;
(10) pressure---pressure serial connection virtual instrument control experiment;
5. system integration experimentalists and technicians:
(1) system configuration experiment;
(2) system communication experiment;
(3) modification of antithetical phrase default value and pid parameter experiment;
6. communication experiment series:
(1) data communication of host computer and each control system experiment;
(2) utilize communicating by letter of public telephone network and client.
7. System Discrimination experimentalists and technicians:
The System Discrimination of (1) liquid level---flow system;
The System Discrimination of (2) temperature---flow system;
(3) System Discrimination of pressure system;
Characteristics of the present invention:
1. adopt system integration new technology that each device, various control mode are integrated in the system, realized the unified control and the management of integrated system.
2. the present invention carries out the mode that centralization and decentralization control combines, and both can realize the decentralised control of each device, variety of way, also can be by integrated system to each monitoring of control device experimental data and parameter setting.
3. adopt four kinds of control modes (instrument control, PLC control, computer control, virtual instrument control) that four controlled quentity controlled variables (liquid level, flow, temperature, pressure) have been realized process control, these four kinds of control modes and controlled quentity controlled variable are most representative control mode and the controlled quentity controlled variables of using at present in the commercial production, and the student can obtain comparatively comprehensively engineering training by experiment.
4. equipment such as the instrument of experimental provision employing, transmitter, operation valve are commercial unit, allow the student commercial unit be had the perceptual knowledge of a distinctness, and can allow the student that commercial unit is had more understanding by means such as instrument adjustment, cultivate the manipulative ability that the student uses commercial unit.
5. experimental provision adopts the panel dongle configuration, and the student has reached the teaching requirement of design mode experiment by the various systems of plug-in unit line one-tenth capable of being combined.Electrical appliance part installs organic glass back cover and electrical shock protection switch additional, guarantees the security of experiment.
Embodiment of the present invention
Embodiment of the present invention is controlled to be example with the liquid level single loop, accompanying drawings.What will control in the control of single loop liquid level is the liquid level of tank, and this height is set on the control interface of instrument, computing machine by the experimenter.The actual height of water level of liquid level tank records by transmitter, after being changed to the normalized current signal, send into the A/D converting unit and be converted to digital signal, this signal inputs to the integrated control system of being made up of four kinds of control modes (instrument control, PLC control, computer control, virtual instrument control), selects a kind of control mode to control as required by the experimenter.With the computer controlled example that is made as, after the digital signal input, computing machine will carry out data processing such as digital filtering, multi-channel signal separation, PID computing to this signal.Data after the processing are divided into two-way, the one tunnel as feedback signal after D/A conversion, input control valve makes variable valve open or cut out, the flow that makes water changes according to the operation result adjustment of computing machine, thereby allows the actual water level of tank reach experimenter's requirement.Another road of data after the processing enters system integration host computer (this is a big integrated system, or claims controlling object parameter integrated system) through data switching exchane.This host computer is the uniform data configuration of the different controlling object of three control device, and shows on system integration display.Host computer is also sent data into data communication module, and the client by public telephone network or private and Terminal Server Client communicates through client's application process.Simultaneously because data communication is two-way, thus host computer or client also can output signal changing the setting value of liquid level, or change controlled variable.
Claims (11)
1, a kind of system integration process control and communication experiment system,---discharge process control device, temperature---the discharge process control device that it is characterized in that it is by liquid level, three controlled devices of press process control device and liquid level, flow, temperature, four kinds of controlled parameter sets of pressure are formed in the image parameter integrated system of a system and develop into instrument control, PLC control, computer control, virtual instrument by single control mode and control the mode integrated system that four kinds of control modes are integrated in a system; Liquid level, temperature, three controlled devices of pressure, liquid level, flow, temperature, four kinds of controlled parameters of pressure are sent to four kinds of mode control system by the signal that different transmitters records respectively after the A/D conversion, after host computer is integrated, send into data communication module, realization lab lan communication, and realize data transmission and communicate by letter by network or public telephone network.
2, system integration process control according to claim 1 and communication experiment system, it is characterized in that, described three controlled devices are one-tenth single order capable of being combined respectively, second order, serial connection, various control models such as ratio, the actual parameter of controlling object passes through transmitters sense, the signal that records is sent into data acquisition module, digital signal after the A/D conversion can be sent digital regulated instrument respectively, the PLC controller, computing machine or virtual instrument carry out digital filtering, data processing modules such as the Signal Separation of multiple input path carry out data processing, signal after treatment carries out the control algolithm computing, output signal after the computing is after the D/A conversion, convert air pressure signal to through current to pneumatic converter and promote operated pneumatic valve, with controlled parameter adjustment to desired value, this signal is imported host computer through data exchange unit simultaneously, carry out integrated processing after the host computer received signal, integrated back signal. integrated demonstration and signal sent into data communication module on display screen, utilize dedicated network or public telephone network and client to communicate; Integrated back signal is handled, required to send the change setting value, change pid parameter, change the control mode signal, feed back to controller through data exchange unit again according to the operator.
3, system integration process control according to claim 1 and communication experiment system, it is characterized in that, described liquid level---volume control device comprises: the upper and lower tank of liquid level, spinner-type flowmeter, diffused silicon pressure transmitter, pneumatic control valve, reduction valve, current to pneumatic converter, water circulating pump, electric voltage/frequency converter.
4, system integration process control according to claim 1 and communication experiment system, it is characterized in that described temperature---volume control device comprises: inside and outside sleeve formula water heater, spinner-type flowmeter, thermal resistance thermometer, pneumatic control valve, reduction valve, current to pneumatic converter, water circulating pump, temperature transmitter, electric voltage/frequency converter, controllable silicon electric power regulating circuit.
5, system integration process control according to claim 1 and communication experiment system is characterized in that, described pressure control device comprises: large and small pressure vessel, diffused silicon pressure transmitter, air operated controller, reduction valve, current to pneumatic converter.
6, system integration process control according to claim 1 and communication experiment system is characterized in that, described blind controller system comprises: single loop digital governer, serial connection digital governer, A/D, D/A converter.
7, system integration process control according to claim 1 and communication experiment system is characterized in that, described PLC (Programmable Logic Controller) control system comprises: the PLC controller, A/D, D/A module, analog quantity control module, communication module, order wire, computing machine, PLC Control Software.
8, system integration process control according to claim 1 and communication experiment system is characterized in that, described computer control system comprises: A/D, D/A module, computing machine, computer control software, computing machine configuration software.
9, system integration process control according to claim 1 and communication experiment system, it is characterized in that, described virtual instrument control system comprises: data acquisition module comprises data processing module, the control algolithm module that comprises conventional PID, integral separation PID algorithm and host computer communication module that multiple input path data separating, digital filtering are handled.
10, system integration process control according to claim 1 and communication experiment system, it is characterized in that described system integration master system comprises: industry control system, data exchange unit, configuration software, data processing software, each system's software for display, communication software, network control software.
11, system integration process control according to claim 1 and communication experiment system is characterized in that, described data communication module comprises: communication interface, network control software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410084393 CN1260692C (en) | 2004-11-22 | 2004-11-22 | System integrated process control and communication experiment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410084393 CN1260692C (en) | 2004-11-22 | 2004-11-22 | System integrated process control and communication experiment system |
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| CN1609918A true CN1609918A (en) | 2005-04-27 |
| CN1260692C CN1260692C (en) | 2006-06-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102671491A (en) * | 2012-04-11 | 2012-09-19 | 陈勇 | High-pressure micron-sized atomizing dust suppression system |
| CN102982721A (en) * | 2012-12-13 | 2013-03-20 | 重庆大学 | Experiment teaching device capable of controlling temperature feedback of oven automatically |
| CN101297248B (en) * | 2005-10-27 | 2013-07-10 | Vega格里沙贝两合公司 | Database interface for field device |
| CN105139720A (en) * | 2015-09-06 | 2015-12-09 | 黄山学院 | Computer monitoring test apparatus with object-oriented feature |
| CN113658491A (en) * | 2021-05-21 | 2021-11-16 | 常州工学院 | Virtual process control experimental device |
-
2004
- 2004-11-22 CN CN 200410084393 patent/CN1260692C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101297248B (en) * | 2005-10-27 | 2013-07-10 | Vega格里沙贝两合公司 | Database interface for field device |
| CN102671491A (en) * | 2012-04-11 | 2012-09-19 | 陈勇 | High-pressure micron-sized atomizing dust suppression system |
| CN102982721A (en) * | 2012-12-13 | 2013-03-20 | 重庆大学 | Experiment teaching device capable of controlling temperature feedback of oven automatically |
| CN102982721B (en) * | 2012-12-13 | 2015-02-04 | 重庆大学 | Experiment teaching device capable of controlling temperature feedback of oven automatically |
| CN105139720A (en) * | 2015-09-06 | 2015-12-09 | 黄山学院 | Computer monitoring test apparatus with object-oriented feature |
| CN105139720B (en) * | 2015-09-06 | 2017-07-14 | 黄山学院 | The computer monitoring test device of Object Oriented Characteristic |
| CN113658491A (en) * | 2021-05-21 | 2021-11-16 | 常州工学院 | Virtual process control experimental device |
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| Publication number | Publication date |
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| CN1260692C (en) | 2006-06-21 |
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