CN1792459A - Physical chemistry experimental system based-on virtual instrument control tech. - Google Patents
Physical chemistry experimental system based-on virtual instrument control tech. Download PDFInfo
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- CN1792459A CN1792459A CN 200510016432 CN200510016432A CN1792459A CN 1792459 A CN1792459 A CN 1792459A CN 200510016432 CN200510016432 CN 200510016432 CN 200510016432 A CN200510016432 A CN 200510016432A CN 1792459 A CN1792459 A CN 1792459A
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Abstract
A physicochemical experiment system based on virtual instrument control technique is composed of a temp controller on the basis of semiconductor refrigerating technique, a signal processing unit connected via 485 bus to said temp controller, computer and software control system.
Description
(1) technical field:
The invention belongs to experiment and use automated control technology, particularly relate to the Physical Chemistry Experiment system that the technology that virtual instrument technique, semiconductor refrigerating, signal condition, data analysis etc. are used for the Physical Chemistry Experiment system is integrated into multiple analytical and testing instrument and finishes multiple College Physics chemical experiment.
(2) background technology:
The development and application of virtual instrument (Virtual Instruments VI) technology comes from the LabVIEW software of America NI (National Instruments) company design in 1986, it is a kind of integrated environment based on graphical development, debugging and working procedure, has realized the notion of VI.The measurement of computer strong calculation and processing data capability and instrument hardware, control ability are combined, not only dwindled the cost and the volume of hardware measurement and control instrument greatly, and realize demonstration, storage and analyzing and processing data.At present, external many universities and research institution have all attempted virtual instrument is applied in scientific experiment, Engineering Control and the experimental teaching.As seen virtual instrument technique is an extremely rising technology.In College Physics chemical experiment process,, need carry out multi pass acquisition, record, analysis, handle and derive the result parameters (temperature, pressure, flow, flow velocity, content, liquid level etc.) by various sensors.The measurement to its parameters generally all is to carry out the pointwise actual measurement with traditional instrument or comparatively advanced intelligence instrument in the Physical Chemistry Experiment process at present, gathering the multichannel data parameter corresponding FEEDBACK CONTROL in Xingqi of going forward side by side simultaneously as need is the comparison difficulty, particularly need to coordinate complicated observing and controlling, implementing with regard to traditional instrument obviously is the comparison difficulty, and can well, accurately finish this work based on virtual instrument technique.
In present Physical Chemistry Experiment process, each experiment all is with a relatively independent cover experimental provision, means of testing is also relatively backward, as temperature survey, adopt traditional glass-stem thermometer, or high-precision Beckman thermometer, need the student often to observe in the experimentation and write down its reading, particularly need fast and for a long time in the experiment that temperature data writes down in the experiment, influenced observation, thereby influenced experiment effect experimental phenomena itself.In addition, laboratory facilities also mostly are traditional means, and each experiment is general uses relatively independent laboratory apparatus, between the instrument without any data communication facility, student's hand-kept experimental data, mapping is carried out data analysis and is drawn experimental result then.Owing to be manual measurement record experimental data, make the precision of experimental data and reliability all can not guarantee, thereby influence experimental result.
(3) summary of the invention:
The objective of the invention is to design a kind of Physical Chemistry Experiment system based on the virtual instrument control technology, it is to utilize computer and the advanced technology aspect processing digital information thereof, and introduced the notion of virtual instrument, characteristics in conjunction with Physical Chemistry Experiment itself, to a series of Physical Chemistry Experiments, as chemical reaction, as the BZ oscillation experiment, the measurement of heat fusion experiment, Determination of Combustion Heat, heat of neutralization determination experiment, electromotive force-pH concerns experiment, freezing point reduces determination experiment, liquid surface tension detection, the thermostat characteristic test, determination of polarization curve, constant-current titration experiments etc. have realized monitoring in real time and accurately control to the signal acquisition process of multichannel all kinds analog quantity and to the various parameters in the experimentation.
Technical scheme of the present invention: a kind of Physical Chemistry Experiment system based on the virtual instrument control technology, it is characterized in that it is that temperature controller, signal conditioner and computer and software control system by the based semiconductor Refrigeration Technique constituted, be connected with signal conditioner with the computer software control system and the mode by 485 buses is connected temperature controller; Said signal conditioner is made of many signal ports and internal circuit, signal conditioner is connected with capture card in the computer by 68 core shielded cables, signal conditioner is connected with temperature controller by the core shielded cable, peristaltic pump is connected with the signal conditioner control port, and electronic balance is connected with serial ports of computers by 232 connecting lines; Said temperature controller is constituted by the circuit control section and by the cooling and warming part institute that the circuit control section is controlled.
Cooling and warming in the temperature controller of above-mentioned said based semiconductor Refrigeration Technique partly is by the copper thermostat, cooling jacket, semiconductor chilling plate, the cooling jacket intake-outlet, electrically heated rod, circulating pump, interior circulation valve, the outer circulation flowing water Valve, the outer circulation inlet valve, cooling water Inlet and outlet water valve constitutes, outside the both sides of copper thermostat semiconductor chilling plate is arranged, the inner bottom part of copper thermostat is equipped with electrically heated rod, the bottom delivery port of copper thermostat is connected with the water inlet of circulating pump according to pipeline, the top delivery port of copper thermostat is connected with the delivery port of circulating pump by interior circulation valve on the one hand according to parallel pipeline, be connected with the outer circulation inlet valve on the other hand, the delivery port of circulating pump is connected with the outer circulation flowing water Valve, the outside cooling jacket that also has for heat transmission of semiconductor chilling plate that the copper thermostat is outer, the cooling jacket intake-outlet is arranged on the cooling jacket, and the cooling jacket intake-outlet is installed cooling water respectively and is advanced, flowing water Valve.
Semiconductor chilling plate in the above-mentioned said temperature controller adopts double-deck overlaying structure form.
Overfall is left on the top of above-mentioned said copper thermostat.
The temperature relay with the effect of limit temperature is equipped with in above-mentioned said cooling jacket outside for heat transmission, and temperature relay is connected with the control end of semiconductor chilling plate power supply.
Above-mentioned said signal conditioner comprises the collecting temperature sensor that is connected with signal conditioner, ear electromagnetic sensor, pH value sensor, ion electrode, bearing sensor, micro-pressure sensor, miniature peristaltic pump, motor agitating device and temperature control equipment suddenly, wherein collecting temperature sensor, ear electromagnetic sensor, pH value sensor, bearing sensor, voltage, current measurement probe suddenly, said miniature peristaltic pump, motor agitating device and temperature controller are connected with the control output end of signal conditioner.
The internal circuit of above-mentioned said signal conditioner is made up of motherboard circuit and feature board circuit two parts, related motherboard circuit adopts five groups of independently stabilized switch modular circuits, the bus mode of employing signal parallel connection is respectively organized 48 needle interfaces, the interface circuit that adopts five groups of voltage hold circuits and be mated, expanded the quantity of D/A output interface, 5 road D/A are provided output, related motherboard circuit supplies 4 group of 9 needle interface early childhood, provides two-way peristaltic pump and two-way the extendible control 9 pin ports that have multichannel IO interface; Related feature board circuit comprises temperature measuring circuit, pH value measuring circuit, weighs-minute-pressure difference measurements circuit, potential difference meter measuring circuit, tension measuring circuit, current measurement circuit and tachometric survey circuit, and above-mentioned related measuring circuit is made up of constant-current source circuit, low-noise amplifier, low pass filter, reference voltage source; (impedance is greater than 10 for high input impedance amplifier
15More than the Ω), electronic switch forms with, voltage attenuation antihunt circuit amplifier, clamped circuit and voltage comparator circuit, the enlargement ratio of all these circuit is to be finished by the relay of being controlled from the IO communication port of computer acquisition card; Each amplifier output port of feature board is formed big electronic switch through CD4066 and is linked to each other with capture card A/D analog acquisition mouth, controls its break-make.
Above-mentionedly saidly be connected with signal conditioner and connect the virtual instrument software that matches with hardware that the computer of temperature controller and software control system comprise the computer hardware system that central processing unit, 256,000,000 internal memories, 80G hard disk and Geforce-4 display card by PC, P4-2.8G constitute and use the software of being programmed by the LabVIEW software that utilizes America NI company to constitute by 485 bus modes.
The above-mentioned said control interface that generates difference in functionality by signal conditioner by the control of the LabVIEW in computer and software control system software.
The course of work of the present invention and operation principle are: this experimental system is made up of three parts: 1. the temperature control equipment of based semiconductor Refrigeration Technique; 2. signal conditioner; 3. software is controlled in computer and Physical Chemistry Experiment.
As brand-new Physical Chemistry Experiment system, it is computer technology, software engineering, Refrigeration Technique, the Physical Chemistry Experiment technology, the product of multidisciplinary intersection such as automatic control technology, integrated microthermometer, the pH acidometer, potential difference meter, electronic balance, fluid density proportion instrument, the substance moisture content analyzer, surface tensiometer, potentiometric titrimeter, potentiostat, the conventional instrument in kinds of experiments chambers such as universal meter, these conventional instruments are being the same aspect the measurement data with traditional instrument, but all feature operations are to carry out by the soft control panel of computer screen, the data processing function of instrument is also finished by software, all like this instrumental functions are all defined by the programming personnel, can realize senior measuring instrument measurement data that possesses and the function of analyzing data fully, simultaneously, because these instruments all are in same application platform operation, so very strong interdependence is arranged, be easy to carry out the data communication between instrument, be highly susceptible to forming new apparatus measures and control system according to user's needs.Simultaneously, can carry out data easily and preserve owing to be the computer real-time record data, this be conventional instrument can not compare.
The hot side radiating mode that uses in the said chemical reactor thermostat is the mode of water-cooled.Heat-transfer fluid in the thermostat by open in its bottom and areole, form closed circuit by pipeline, thermostat circulating pump, play the effect of abundant mixing thermostat inner fluid, the temperature difference of thermostat inner fluid is reduced.
Semiconductor refrigeration system by the digital switch DC power supply in the temperature controller, according to the required condition of chemical reaction, sends instruction by intelligence instrument or computer, and control refrigeration work voltage is that direct current 0～14V is adjustable.Be higher than when setting 70 ℃ of protection temperature upper limits when the hot-face temperature of semiconductor refrigerating assembly simultaneously, hot protective relay is opened, and the digital DC power supply quits work, the protection cooling assembly.
As Physical Chemistry Experiment, can provide and measure required accurate temperature field directly to measurement result generation significant effects, for reaching the purpose of accurate temperature controlling, except that the electrical heating of accurately controlling, also need adopt corresponding low-temperature receiver to carry out adjustment, obtain being lower than the temperature field of room temperature+5 ℃.The cryochemistry reactor of using in present many scientific experiments generally mostly is to adopt cryosel to bathe and fluorinated refrigerant reaches the refrigeration purpose, and the former has the shortcoming that can not accurately control the temperature of reactor condition, and is very inconvenient in the operation; Though the latter the operation on and make moderate progress aspect the temperature control, aspect environmental protection, exist the slow shortcoming of fluorinated refrigerant problem of environment pollution caused and refrigerating speed.Semiconductor refrigerating technology is in recent years along with the continuous development of semiconductor technology with improve and a novel Refrigeration Technique growing up, it is fast rapidly to have refrigeration, noiselessness, pollution-free, can realize that real-time refrigeration is a green refrigeration technology, because the characteristics of semiconductor refrigerating technology own, obtaining precise dose control effect so be easy to realize PID control, is the direction of Refrigeration Technique development from now on.
Signal conditioner is the bridge between various sensors and computer acquisition system.Signal conditioner realizes mainly that various sensors present that the conditioning of the small-signal of coming is done and to the output control function of experimental system actuator, there are amplifying circuit, high-impedance amplifier, variable gain amplifier, low pass filter, electric function switch etc. in inside.Can realize the measurement of physical quantitys such as temperature, pressure, flow, current potential, electromotive force, pH value, electrical conductivity, weight.Its internal circuit structure is the bus structures mode that adopts based on test signal, can change each feature board easily according to user's request, realizes the collecting test function of various signals, is convenient to from now on popularization and function expansion.By the shielded cable that links to each other with computer the individual standard signal of orderliness is presented to computer, realized test signal orderliness function.
This experimental system can be finished multinomial College Physics chemical experiment and reduce determination experiment, liquid surface tension detection, thermostat characteristic test, determination of polarization curve, constant-current titration experiment etc. as: BZ oscillation experiment measurement of heat fusion experiment, Determination of Combustion Heat, heat of neutralization determination experiment, electromotive force-pH relation experiment, freezing point.On Physical Chemistry Experiment system soft operation interface, can finish the setting of temperature progress, definite experiment terminal point, record experimental data, analyzing and processing experimental data, deposit, printing, network data transmission etc.Can also implement various control methods as PID control, fuzzy control and PREDICTIVE CONTROL etc.
Superiority of the present invention is: 1, be multi-disciplinary intersections such as chemistry, machinery, control automatically, computer, base has become the observing and controlling of multiple Physical Chemistry Experiment and various parameters in one, improved the experiment condition of College Physics chemistry, experiments of measuring data accurately, favorable repeatability is avoided the human operational error; 2, this work system can be widely used in chemical industry, pharmacy, the scientific experiment of macromolecular material and fine chemistry industry industry and colleges and universities through suitable improvement; 3, this work system has been finished integrated and tester integrated of experimental project, make the integrated cost of experiment and testing equipment significantly reduce, really realized the notion of " laboratory is being carried ", for a new thinking has been opened up in the development of Physical Chemistry Experiment chamber from now on; 4, temperature controller of the present invention adopts the method for double-deck cooling piece stack, has increased the actual temperature difference of cold and hot surface effectively, has reduced the requirement to the temperature of hot side cooling water, makes the ability of refrigeration be improved; 5, because the existence of refrigeration system is arranged, can finish the measurement of the physical data of many low temperature, widened the test specification of Physical Chemistry Experiment, make low-temperature measurement at ordinary times become very convenient, the particularly application of Computer Control Technology, cooperate simultaneously various intelligent control algorithms can realize the dynamic temperature control precision less than 0.05 degree centigrade of static thermostatic control less than 0.02 degree centigrade, make the certainty of measurement of dynamic temperature effectively improve; 6, this work system also has the condition that low-temp reaction (30 ℃) are provided.
(4) description of drawings:
Accompanying drawing 1 is the overall structure schematic diagram of the related a kind of Physical Chemistry Experiment system based on the virtual instrument control technology of the present invention.
Wherein: 1. temperature controller 2. signal conditioners, 3. computers and software control system 4. stirring motors 5. electronic balances 6. peristaltic pumps 7,8 voltages, current measurement probe 9,10 electro-motive force measurements are popped one's head in, and 11.pH electrode 12. ion electrodes 13. Hall speed probes 14. are weighed and differential pressure pickup 15,16. temperature sensors 17. micro-pressure sensors 18 are that 4 core shielded cables 19 are that 485 connecting lines 20 are that 232 connecting lines 21 are 68 core shielded cables;
Accompanying drawing 2 is related a kind of based on refrigeration of the temperature controller in the Physical Chemistry Experiment system of virtual instrument control technology and heating system schematic diagram for the present invention.
Wherein: circulation valve 1-8. outer circulation flowing water Valve 1-9. outer circulation inlet valve 1-10,1-11. cooling water Inlet and outlet water valve 1-12 are the overfall on the top of copper thermostat 1-1 in the 1-1. copper thermostat 1-2 cooling jacket intake-outlet 1-3. semiconductor chilling plate 1-4. cooling jacket 1-5. electrically heated rod 1-6. circulating pump 1-7..
Fig. 3 is related a kind of based on the signal conditioner circuit module figure in the Physical Chemistry Experiment system of virtual instrument control technology for the present invention.
A kind of (wherein: 4-1 is a BZ vibration determination experiment to Fig. 4 based on the computer software surface chart in the Physical Chemistry Experiment system of virtual instrument control technology for the present invention is related, 4-2 is the surface tension test experiment, 4-3 is the electro-motive force measurement experiment, 4-4 is the measurement of heat fusion experiment, 4-5 is a program with the aid of pictures, and 4-6 is that temperature is set, and 4-7 is the Determination of Combustion Heat experiment, 4-8 is an acidometer, and 4-9 is that data transmit).
Fig. 5 is that (wherein: 5-1 is the high input impedance amplifying circuit to the related a kind of concrete element circuit figure based on the signal conditioner in the Physical Chemistry Experiment system of virtual instrument control technology of the present invention, 5-2 is a differential amplifier circuit, 5-3 is a reference voltage source, 5-4 is a function conversion circuit, 5-5 is a constant-current source circuit, 5-6 is a low pass filter, and 5-7 is a voltage hold circuit).
(5) specific embodiment:
Embodiment: a kind of Physical Chemistry Experiment system (seeing Fig. 1-5) based on the virtual instrument control technology, it is characterized in that it is made of with computer and software control system 3 temperature controller 1 of based semiconductor Refrigeration Technique, signal conditioner 2, be connected with signal conditioner 2 with computer software control system 3 and the mode by 485 buses 19 is connected temperature controller 1; Said signal conditioner 2 is that many signal ports and the internal circuit by 6-17 constituted, signal conditioner 2 is connected with capture card in the computer by 68 core shielded cables 20, signal conditioner 2 is connected with temperature controller by 4 core shielded cables, peristaltic pump 6 is connected with signal conditioner 2 control ports, and electronic balance 5 is by 232 connecting lines 20 (see figure 1) that is connected with serial ports of computers; Said temperature controller 1 is constituted by the circuit control section and by the cooling and warming part institute that the circuit control section is controlled.
Cooling and warming part (see figure 2) in the temperature controller 1 of above-mentioned said based semiconductor Refrigeration Technique is by copper thermostat 1-1, cooling jacket 1-4, semiconductor chilling plate 1-3, cooling jacket intake-outlet 1-2, electrically heated rod 1-5, circulating pump 1-6, interior circulation valve 1-7, outer circulation flowing water Valve 1-8, outer circulation inlet valve 1-9, cooling water Inlet and outlet water valve 1-10 and 1-11 constitute, outside the both sides of copper thermostat 1-1 semiconductor chilling plate 1-3 is arranged, the inner bottom part of copper thermostat 1-1 is equipped with electrically heated rod 1-5, the bottom delivery port of copper thermostat 1-1 is connected according to the water inlet of pipeline with circulating pump 1-6, the top delivery port of copper thermostat 1-1 is connected with the delivery port of circulating pump 1-6 by interior circulation valve 1-7 on the one hand according to parallel pipeline, be connected with outer circulation inlet valve 1-9 on the other hand, the delivery port of circulating pump 1-6 is connected with outer circulation flowing water Valve 1-8, the outside cooling jacket 1-4 that also has for heat transmission of semiconductor chilling plate 1-3 that copper thermostat 1-1 is outer, cooling jacket intake-outlet 1-2 is arranged on the cooling jacket 1-4, and cooling jacket intake-outlet 1-2 installs cooling water Inlet and outlet water valve 1-10 and 1-11 respectively.
Semiconductor chilling plate 1-3 in the above-mentioned said temperature controller 1 adopts double-deck overlaying structure form.
Overfall 1-12 is left on the top of above-mentioned said copper thermostat 1-1.
The temperature relay with the effect of limit temperature is equipped with in above-mentioned said cooling jacket 1-4 outside for heat transmission, and temperature relay is connected with the control end of semiconductor chilling plate 1-3 power supply.
Above-mentioned said signal conditioner 2 comprises the collecting temperature sensor 16 that is connected with signal conditioner 2, ear electromagnetic sensor 13, pH value sensor 11, ion electrode 12, bearing sensor 5, micro-pressure sensor 17, miniature peristaltic pump 6, motor agitating device 4 and temperature control equipment suddenly, wherein collecting temperature sensor 16, ear electromagnetic sensor 13, pH value sensor 11, bearing sensor 14, voltage, current measurement probe 7 and 8 suddenly, said miniature peristaltic pump 6, motor agitating device 4 and temperature controller 1 are connected with the control output end of signal conditioner 2.
The internal circuit of above-mentioned said signal conditioner 2 is made up of motherboard circuit and feature board circuit two parts, related motherboard circuit adopts five groups of independently stabilized switch modular circuits, adopt the bus mode of signal parallel to connect 5 group of 48 needle interface respectively, the interface circuit that adopts 5 groups of voltage hold circuits and be mated, expanded the quantity of D/A output interface, 5 road D/A are provided output, related motherboard circuit supplies 4 group of 9 needle interface early childhood, provides two-way peristaltic pump and two-way the extendible control 9 pin ports that have multichannel IO interface; Related feature board circuit comprises temperature measuring circuit, pH value measuring circuit, weighs-minute-pressure difference measurements circuit, potential difference meter measuring circuit, tension measuring circuit, current measurement circuit and tachometric survey circuit, and above-mentioned related measuring circuit is made up of constant-current source circuit, low-noise amplifier, low pass filter, reference voltage source; (impedance is greater than 10 for high input impedance amplifier
15More than the Ω), electronic switch forms with, voltage attenuation antihunt circuit amplifier, clamped circuit and voltage comparator circuit, the enlargement ratio of all these circuit is to be finished by the relay of being controlled from the IO communication port of computer acquisition card; Each amplifier output port of feature board is formed big electronic switch through CD4066 and is linked to each other with capture card A/D analog acquisition mouth, controls its break-make (seeing Fig. 3 and Fig. 5).
Above-mentionedly saidly be connected with signal conditioner 2 and connect the virtual instrument software that matches with hardware that the computer of temperature controller 1 and software control system 3 comprise the computer hardware system that central processing unit, 256,000,000 internal memories, 80G hard disk and Geforce-4 display card by PC, P4-2.8G constitute and use the software of being programmed by the LabVIEW software that utilizes America NI company to constitute by 485 bus modes.
The above-mentioned said control interface that generates difference in functionality by signal conditioner 2 by the control of the LabVIEW in computer and the software control system 3 software.
What the circuit part in the above-mentioned said Physical Chemistry Experiment system adopted is the combination of known element circuit, and the illustration of the known element circuit of part is provided among Fig. 5.
Claims (9)
1, a kind of Physical Chemistry Experiment system based on the virtual instrument control technology, it is characterized in that it is that temperature controller, signal conditioner and computer and software control system by the based semiconductor Refrigeration Technique constituted, be connected with signal conditioner with the computer software control system and the mode by 485 buses is connected temperature controller; Said signal conditioner is made of many signal ports and internal circuit, signal conditioner is connected with capture card in the computer by 68 core shielded cables, signal conditioner is connected with temperature controller by the core shielded cable, peristaltic pump is connected with the signal conditioner control port, and electronic balance is connected with serial ports of computers by 232 connecting lines; Said temperature controller is constituted by the circuit control section and by the cooling and warming part institute that the circuit control section is controlled.
2, according to the said a kind of Physical Chemistry Experiment system of claim 1 based on the virtual instrument control technology, it is characterized in that the cooling and warming in the temperature controller of said based semiconductor Refrigeration Technique partly is by the copper thermostat, cooling jacket, semiconductor chilling plate, the cooling jacket intake-outlet, electrically heated rod, circulating pump, interior circulation valve, the outer circulation flowing water Valve, the outer circulation inlet valve, cooling water Inlet and outlet water valve constitutes, outside the both sides of copper thermostat semiconductor chilling plate is arranged, the inner bottom part of copper thermostat is equipped with electrically heated rod, the bottom delivery port of copper thermostat is connected with the water inlet of circulating pump according to pipeline, the top delivery port of copper thermostat is connected with the delivery port of circulating pump by interior circulation valve on the one hand according to parallel pipeline, be connected with the outer circulation inlet valve on the other hand, the delivery port of circulating pump is connected with the outer circulation flowing water Valve, the outside cooling jacket that also has for heat transmission of semiconductor chilling plate that the copper thermostat is outer, the cooling jacket intake-outlet is arranged on the cooling jacket, and the cooling jacket intake-outlet is installed cooling water respectively and is advanced, flowing water Valve.
3, according to the said a kind of Physical Chemistry Experiment system of claim 2, it is characterized in that the semiconductor chilling plate in the said temperature controller adopts double-deck overlaying structure form based on the virtual instrument control technology.
4, according to the said a kind of Physical Chemistry Experiment system of claim 2, it is characterized in that overfall is left on the top of said copper thermostat based on the virtual instrument control technology.
5, according to the said a kind of Physical Chemistry Experiment system of claim 2 based on the virtual instrument control technology, the temperature relay with the effect of limit temperature is equipped with in the cooling jacket outside that it is characterized in that said confession heat transmission, and temperature relay is connected with the control end of semiconductor chilling plate power supply.
6, according to the said a kind of Physical Chemistry Experiment system of claim 1 based on the virtual instrument control technology, it is characterized in that said signal conditioner comprises the collecting temperature sensor that is connected with signal conditioner, ear electromagnetic sensor suddenly, pH value sensor, ion electrode, bearing sensor, micro-pressure sensor, miniature peristaltic pump, motor agitating device and temperature control equipment, collecting temperature sensor wherein, ear electromagnetic sensor suddenly, pH value sensor, bearing sensor, voltage, current measurement probe, said miniature peristaltic pump, motor agitating device and temperature controller are connected with the control output end of signal conditioner.
7, according to the said a kind of Physical Chemistry Experiment system of claim 1 based on the virtual instrument control technology, the internal circuit that it is characterized in that said signal conditioner is made up of motherboard circuit and feature board circuit two parts, related motherboard circuit adopts five groups of independently stabilized switch modular circuits, the bus mode of employing signal parallel connection is respectively organized 48 needle interfaces, the interface circuit that adopts five groups of voltage hold circuits and be mated, expanded the quantity of D/A output interface, 5 road D/A are provided output, related motherboard circuit supplies 4 group of 9 needle interface early childhood, provides two-way peristaltic pump and two-way the extendible control 9 pin ports that have multichannel IO interface; Related feature board circuit comprises temperature measuring circuit, pH value measuring circuit, weighs-minute-pressure difference measurements circuit, potential difference meter measuring circuit, tension measuring circuit, current measurement circuit and tachometric survey circuit, and above-mentioned related measuring circuit is made up of constant-current source circuit, low-noise amplifier, low pass filter, reference voltage source; High input impedance amplifier (impedance is greater than more than 1015 Ω), electronic switch are formed with, voltage attenuation antihunt circuit amplifier, clamped circuit and voltage comparator circuit, and the enlargement ratio of all these circuit is to be finished by the relay of being controlled from the IO communication port of computer acquisition card; Each amplifier output port of feature board is formed big electronic switch through CD4066 and is linked to each other with capture card A/D analog acquisition mouth, controls its break-make.
8,, it is characterized in that saidly being connected with signal conditioner and connecting the virtual instrument software that matches with hardware that the computer of temperature controller and software control system comprise the computer hardware system that central processing unit, 256,000,000 internal memories, 80G hard disk and Geforce-4 display card by PC, P4-2.8G constitute and use the software of being programmed by the LabVIEW software that utilizes America NI company to constitute by 485 bus modes according to the said a kind of Physical Chemistry Experiment system of claim 1 based on the virtual instrument control technology.
9,, it is characterized in that the said control interface that generates difference in functionality by signal conditioner by the control of the LabVIEW in computer and software control system software according to the said a kind of Physical Chemistry Experiment system of claim 1 based on the virtual instrument control technology.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777370A (en) * | 2012-01-11 | 2012-11-14 | 福州大学 | Realization method of LabVIEW-based high-pressure pump performance testing system |
| CN105487576A (en) * | 2016-01-04 | 2016-04-13 | 中国电子信息产业集团有限公司第六研究所 | Constant temperature oil tank device with temperature control system |
| CN109550476A (en) * | 2018-12-05 | 2019-04-02 | 济南大学 | A kind of double Zhi Zhineng test tube external members and its application |
| CN113506499A (en) * | 2021-07-08 | 2021-10-15 | 张明晓 | Chemical digital experiment system |
| CN117727226A (en) * | 2023-11-28 | 2024-03-19 | 泰山学院 | Integrated measurement method for heat of fusion experiment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2618665Y (en) * | 2003-04-16 | 2004-06-02 | 天津理工学院 | Chemical reactor based on virtual instrument control technology |
| CN2907888Y (en) * | 2005-11-25 | 2007-06-06 | 天津理工大学 | Physical chemistry experimental device based on virtual instrument control technology |
-
2005
- 2005-11-25 CN CNB2005100164322A patent/CN100515569C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777370A (en) * | 2012-01-11 | 2012-11-14 | 福州大学 | Realization method of LabVIEW-based high-pressure pump performance testing system |
| CN102777370B (en) * | 2012-01-11 | 2015-06-03 | 福州大学 | Realization method of LabVIEW-based high-pressure pump performance testing system |
| CN105487576A (en) * | 2016-01-04 | 2016-04-13 | 中国电子信息产业集团有限公司第六研究所 | Constant temperature oil tank device with temperature control system |
| CN109550476A (en) * | 2018-12-05 | 2019-04-02 | 济南大学 | A kind of double Zhi Zhineng test tube external members and its application |
| CN113506499A (en) * | 2021-07-08 | 2021-10-15 | 张明晓 | Chemical digital experiment system |
| CN117727226A (en) * | 2023-11-28 | 2024-03-19 | 泰山学院 | Integrated measurement method for heat of fusion experiment |
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| CN100515569C (en) | 2009-07-22 |
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