CN107992125A - A kind of control system and method for the thermogravimetric analysis experimental provision based on Labview - Google Patents
A kind of control system and method for the thermogravimetric analysis experimental provision based on Labview Download PDFInfo
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- CN107992125A CN107992125A CN201711459811.8A CN201711459811A CN107992125A CN 107992125 A CN107992125 A CN 107992125A CN 201711459811 A CN201711459811 A CN 201711459811A CN 107992125 A CN107992125 A CN 107992125A
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- Prior art keywords
- temperature
- thermobalance
- temperature controller
- heating furnace
- personal computer
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
Abstract
Present invention relates particularly to a kind of control system and method for the thermogravimetric analysis experimental provision based on Labview, including：Industrial personal computer, thermobalance, temperature controller and heating furnace, wherein, the control machines lead-out terminal of temperature controller is connected with the power of controlled silicon module being arranged in heating furnace；The thermocouple terminal of temperature controller is connected with the thermocouple being arranged in heating furnace；Thermobalance is connected with being arranged in heating furnace, including the crucible of sample；The industrial personal computer of Labview is run respectively with temperature controller, hot day flushconnection, for receiving temperature data, qualitative data, is shown in the control interface of industrial personal computer in the form of waveform chart, and in the parameter of control interface set temperature controller and thermobalance.Balance is controlled, temperature control, data are shown and the function such as data record has uniformly been integrated in host computer, simple to operate, and are avoided close to furnace operation, reduce security risk.
Description
Technical field
The invention belongs to the automatic control technology field of metallurgy industry, and in particular to a kind of thermogravimetric based on Labview point
Analyse the control system and method for experimental provision.
Background technology
Thermogravimetric analysis refers to one kind heat of the quality with temperature change relation that sample to be tested is measured under the conditions of temperature programmed control
Analytical technology, can be used for the heat endurance and component of research material.Thermogravimetric analysis can be applied to many aspects, such as：Survey
The heat endurance of the content and sample of inorganic matter or organic matter, the degradation mechanism and kinetics of research material in random sample product
Deng.Thermogravimetric analysis is quite varied in the application of polymeric material field, also has considerable application in metallurgy industry.
Thermogravimetric analysis experimental provision is mainly made of thermobalance, heating furnace and temperature programmed control system.Thermobalance be exclusively for
The instrument realized thermogravimetric e measurement technology and made, belongs to the precision instrument of particular/special requirement, usually with serial ports, can and host computer
Realize data communication.Heating furnace is usually by heating wire and power of controlled silicon module composition.Power of controlled silicon module receives program temperature
The control signal of control system, is adjusted the angle of flow of heating wire both end voltage, and voltage changes therewith, so as to adjust heating work(
Rate.Programmable temperature control system is according to technological requirement, it can be achieved that constant temperature, heating or the requirement in the stage of cooling.Usual thermogravimetric analysis is real
Experiment device only realizes quality and temperature signal is integrated in host computer, and the operation such as the clearing of thermobalance, debugging is still in balance
Control panel on be manually operated, program temperature control operated on temperature controller panel, so brought to operating personnel
Big inconvenience, while operate close to heating furnace, furnace high-temperature and heating furnace power supply bring certain safety to operating personnel
Hidden danger, therefore, is better achieved thermobalance control and program temperature control system integrating on host computer, real to thermogravimetric analysis
It is particularly important that for experiment device.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of control of the thermogravimetric analysis experimental provision based on Labview
System, balance is controlled, temperature control, data are shown and the function such as data record has uniformly been integrated in host computer, easy to operate
It is convenient, and avoid close to furnace operation, reduce security risk, excellent basis has been established for technique application.
To solve the above problems, the technical solution adopted by the present invention is：
A kind of control system of the thermogravimetric analysis experimental provision based on Labview, including：Industrial personal computer, thermobalance, temperature controller
And heating furnace, wherein,
The control machines lead-out terminal of the temperature controller and the power of controlled silicon module being arranged in the heating furnace connect
Connect；
The thermocouple terminal of the temperature controller is connected with the thermocouple being arranged in the heating furnace, for receiving the heat
The temperature data that galvanic couple measures；
The thermobalance is connected with being arranged in the heating furnace, including the crucible of sample, for quality of reception data；
Run Labview the industrial personal computer respectively with the temperature controller, hot day flushconnection, for receiving the temperature number
According to, qualitative data, shown in the control interface of the industrial personal computer in the form of waveform chart, and institute is set in the control interface
State the parameter of temperature controller and thermobalance.
Further, further include：The USB for providing serial network function turns RS485 converters, wherein,
The USB interface that the USB interface of the industrial personal computer turns RS485 converters with the USB is connected；
The RS485 serial ports that the RS485 serial ports of the temperature controller turns RS485 converters with the USB is connected.
Further, further include：The heating wire being arranged in the heating furnace, the power of controlled silicon module and heating wire
Connected with the power supply of 100~380VAC.
Further, the Labview includes：NI clients and VISA function libraries, the VISA function libraries include：VISA
Read function and VISA writes function.
Further, the RS232 serial ports of the industrial personal computer is connected with the RS232 serial ports of the thermobalance.
A kind of setting of control interface of the control system of the thermogravimetric analysis experimental provision based on Labview and display side
Method, including：
The quality signal and temperature signal that the industrial personal computer is received in graph form real-time display in the control interface,
The curve can be hidden, and the curve includes：Figure-of-merit curve, PV curves and SV curves；
The time interval of record data is set in the control interface, records data；The mode of the record data includes：Hand
Dynamic record and automatic record；
Multistage temperature control is carried out in the control interface, realize ladder constant temperature in heating furnace, heating, operation, pause and
Stop；
To the parameter reading and writing of the temperature controller in the control interface；
The thermobalance is controlled in the control interface, including：Switch, peeling, calibration and unit switching.
Further, further include：Shortcut, the first shortcut is shown for Password Input frame and hidden function；Second is quick
Key is shown for time shaft length input frame and hidden function, when input frame is shown, can set the length of time shaft；3rd is fast
Prompt key and the 4th shortcut be respectively time shaft when to subtract 0.5 small and plus 0.5 it is small when shortcut, in the feelings that time shaft output box is hidden
It is operable under condition.
Further, further include：Cryptoguard, recalls Password Input frame, input password changes protected parameter, described
Protected parameter is the period temperature in multistage temperature control, the write parameters of period and temperature controller；When input password is wrong
When missing either without input password or Password Input frame hidden state, corresponding parameter input frame is graying and in disabling mould
Formula, can not change the parameter.
Further, during the automatic record, manually recorded button disabling.
Further, the display interface is equipped with thermobalance stable state indicator light, when indicator light is green, represents
Thermobalance is weighed in stable state, when indicator light is red, is represented that thermobalance is weighed and is played pendulum.
The beneficial effects of the present invention are：Balance is controlled, temperature control, data are shown and the function such as data record is unified
Host computer has been integrated in, it is simple to operate, and avoid close to furnace operation, reduce security risk, be technique application
Excellent basis is established.
Brief description of the drawings
Fig. 1 is the system schematic of the present invention.
Fig. 2 is the control interface display schematic diagram of the present invention.
Embodiment
In order to make those skilled in the art more fully understand technical scheme, with reference to specific embodiment to this
Invention is described in further detail.It note that the embodiments described below is exemplary, be only used for explaining the present invention, and
It is not considered as limiting the invention.Particular technique or condition are not specified in embodiment, according to document institute in the art
The technology or condition of description are carried out according to product description.Reagents or instruments used without specified manufacturer, being can
With conventional products that are commercially available.
According to an aspect of the present invention, the present invention provides the system schematic that, Fig. 1 is the present invention, as shown in Figure 1,
Including：Industrial personal computer, thermobalance, temperature controller and heating furnace, wherein, the control machines lead-out terminal of the temperature controller
It is connected with the power of controlled silicon module being arranged in the heating furnace；The thermocouple terminal of the temperature controller is with being arranged at institute
State the thermocouple connection in heating furnace, the temperature data measured for receiving the thermocouple；The thermobalance is with being arranged at institute
The crucible connection that heating furnace is interior, includes sample is stated, for quality of reception data；Run Labview the industrial personal computer respectively with
The temperature controller, hot day flushconnection, for receiving the temperature data, qualitative data, in control circle of the industrial personal computer
Face is shown in the form of waveform chart, and sets the parameter of the temperature controller and thermobalance in the control interface.
Thus, the present invention controls balance, temperature control, data are shown and the function such as data record is uniformly integrated in
Host computer, it is simple to operate, and avoid close to furnace operation, reduce security risk, established very for technique application
Good basis.
According to a particular embodiment of the invention, present invention additionally comprises：The USB for providing serial network function turns RS485 conversions
Device, wherein, the USB interface that the USB interface of the industrial personal computer turns RS485 converters with the USB is connected；The temperature control
The RS485 serial ports that the RS485 serial ports of device turns RS485 converters with the USB is connected.
According to a particular embodiment of the invention, present invention additionally comprises：The heating wire being arranged in the heating furnace, it is described can
Silicon power module and heating wire is controlled to connect with the power supply of 100~380VAC.
According to a particular embodiment of the invention, the RS232 serial ports of the industrial personal computer and the RS232 serial ports of the thermobalance connect
Connect.
According to a particular embodiment of the invention, the Labview includes：NI clients and VISA function libraries, the VISA
Function library includes：VISA reads function and VISA writes function.Labview on industrial personal computer read by the VISA in VISA built-in functions and
VISA writes function and RS232 serial ports and is connected to USB and turns the USB interfaces of RS485 converters and communicated, the quality of reception and temperature letter
Number, it is shown in waveform chart and is recorded in industrial personal computer file, while by Labview client configuration picture programs to heat
Its gentle temperature controller is configured.
According to another aspect of the present invention, the present invention provides a kind of thermogravimetric analysis experimental provision based on Labview
The setting of the control interface of control system and display methods, Fig. 2 are the control interface display schematic diagram of the present invention, as shown in Fig. 2,
Including：
The quality signal and temperature signal that the industrial personal computer is received in graph form real-time display in the control interface,
The curve can be hidden, and the curve includes：Figure-of-merit curve, PV curves and SV curves；Curve real-time display function can be at the same time
Display quality curve, PV（Temperature）Curve and SV（Temperature setting）Curve, can also cancel hooking arbitrary curve, show needs
Curve.And the corresponding transverse axis of curve（Time shaft）It can adjust corresponding time segment length at any time according to technological requirement, such as 4 small
When or 4.3 it is small when etc..
The time interval of record data is set in the control interface, records data；The mode bag of the record data
Include：Manually recorded and automatic record；Data recording function can realize automatic record and manually recorded function.Record time interval
It can be set according to technological requirement, such as 10 seconds records are once.Automatic record data, according to the automatic record temperature of technological requirement
Bound carrys out trigger recording.For example, 500~1400 DEG C of record data are set, then when electric thermo-couple temperature is within 500~1400 DEG C
When, automatic trigger program records temperature and qualitative data.Manually recorded pattern can also be switched to, is recorded at any time by technological requirement
Data.The automatic record or manually recorded of triggering every time, program is all recorded in the data after triggering can be under E disk data files
With in the triggered time is named and establishes TDMS files.
Multistage temperature control is carried out in the control interface, realizes ladder constant temperature in heating furnace, heating, operation, temporarily
Stop and stop；Multistage temperature control function can realize ladder constant temperature, the control requirement of heating according to technological requirement.One is divided into
10 sections, can be according to the wherein preceding some sections of programs of technological requirement, such as first 7 sections, by setting time and temperature value to realize.It is more
Duan Wendu operations, pause and stopping function can realizing the operation, pause and stopping of multistage temperature program.Three models can appoint
Meaning switching, does not interfere with each other.
To the parameter reading and writing of the temperature controller in the control interface, such as pid parameter etc.；
The thermobalance is controlled in the control interface, including：Switch, peeling, calibration and mode setting（Unit switches）.
According to a particular embodiment of the invention, present invention additionally comprises shortcut, 4 shortcuts are set altogether：Shift+F8
Shown for Password Input frame and hidden function；Shift+F7 is shown for time shaft length input frame and hidden function, works as input frame
During display, the length of time shaft can be set；Shift+F5 and Shift+F6 is respectively that time shaft is when to subtract 0.5 small and plus 0.5 small
When shortcut（It can equally be operated in the case where time shaft output box is hidden）.
According to a particular embodiment of the invention, further include：Cryptoguard, when pressing Shift and F8 at the same time, it is defeated to recall password
Enter frame, input password changes protected parameter, and the protected parameter is the period temperature in multistage temperature control, period
With the write parameters of temperature controller；When inputting password mistake either no input password or Password Input frame hidden state,
Corresponding parameter input frame is graying and is in disabling pattern, can not change the parameter.
According to a particular embodiment of the invention, during the automatic record, manually recorded button disabling, specifically, preventing
For maloperation function under automatic logging mode, data record button is graying and is in disabling pattern, can not operate the button, only
Have and recorded by recording the temperature set in temperature bound automatically come trigger data；After trigger data records, data record
Button becomes green（It is grayish green）But button is thrown away disables pattern for grey, can not operate.When pressing automatic record button again, this is pressed
Button switches to manually recorded pattern, and is shown as manually recorded printed words, can record number by manual click data record button at any time
According to.
According to a particular embodiment of the invention, the display interface is equipped with thermobalance stable state indicator light, works as instruction
When lamp is green, represent that thermobalance is weighed in stable state, when indicator light is red, expression thermobalance is weighed in shakiness
Determine state.
Embodiment one
First, it is 9600bps that baud rate is set on temperature controller, 8 data bit, no parity check position, 1 stop position.USB
The USB ends for turning RS485 converters are connected on industrial personal computer, and RS485 ends are connected on the wire connection terminal of the RS485 of temperature controller.Temperature
The control machines lead-out terminal of degree controller is connected on the corresponding terminal of power of controlled silicon module of heating furnace.With 9 needle serial ports
Bundle of lines thermobalance is connected in the physical serial interface of industrial personal computer.
Then, communications parameter is configured.USB is installed in industrial personal computer and turns the driving of RS485 converters, and is selected in drive software
Select COM2（Virtual serial port）Mouthful turn serial ports corresponding to RS485 converters for USB, setting baud rate is 9600bps, 8 data
Position, no parity check position, 1 stop position, with the serial communication parameter on corresponding temperature controller.In industrial personal computer COM1（Physical serial interface）
Middle setting baud rate is 9600bps, and 8 data bit, no parity check position, 1 stop position, is joined with corresponding to the communication of thermobalance default serial port
Number.
Thermogravimetric analysis experimental provision configuration picture is write under Labview platforms again, establishes NI clients.According to industrial personal computer
With temperature controller and thermobalance serial port communicating protocol, with reference to VISA built-in functions, write and read parameter codes and write parameters code,
Read temperature value and thermobalance mass value in heating furnace.Data recording program is write according to technological requirement, temperature value and quality
Value is recorded in TDMS files.According to technological requirement, configuration picture is write.
Operation more than, that is, complete the hardware configuration and configuration picture journey of thermogravimetric analysis experimental provision control system
Sequence is write.So according to the requirement of technique, it is possible to realize that the data of thermogravimetric analysis experiment show and record and multistage temperature
The functions such as degree control.
The control system of thermogravimetric analysis experimental provision based on Labview of the invention in summary, balance is controlled, temperature
Degree control, data shows and the function such as data record has uniformly been integrated in host computer, simple to operate, and are avoided close to adding
Hot stove operates, and reduces security risk, and excellent basis has been established for technique application.
In the description of the present invention, it is to be understood that term " first ", " second " are only used for description purpose, and cannot
It is interpreted as indicating or implies relative importance or imply the quantity of the technical characteristic indicated by indicating.Thus, define " the
One ", one or more this feature can be expressed or be implicitly included to the feature of " second ".
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms is not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
Combined in an appropriate manner in a or multiple embodiments or example.In addition, without conflicting with each other, the skill of this area
Art personnel can be tied the different embodiments or example described in this specification and different embodiments or exemplary feature
Close and combine.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification, meanwhile, for those of ordinary skill in the art, the think of according to the application
Think, in specific embodiments and applications there will be changes.
Claims (10)
- A kind of 1. control system of the thermogravimetric analysis experimental provision based on Labview, it is characterised in that including：Industrial personal computer, hot day Flat, temperature controller and heating furnace, wherein,The control machines lead-out terminal of the temperature controller and the power of controlled silicon module being arranged in the heating furnace connect Connect；The thermocouple terminal of the temperature controller is connected with the thermocouple being arranged in the heating furnace, for receiving the heat The temperature data that galvanic couple measures；The thermobalance is connected with being arranged in the heating furnace, including the crucible of sample, for quality of reception data；Run Labview the industrial personal computer respectively with the temperature controller, hot day flushconnection, for receiving the temperature number According to, qualitative data, shown in the control interface of the industrial personal computer in the form of waveform chart, and institute is set in the control interface State the parameter of temperature controller and thermobalance.
- 2. system according to claim 1, it is characterised in that further include：The USB for providing serial network function turns RS485 Converter, wherein,The USB interface that the USB interface of the industrial personal computer turns RS485 converters with the USB is connected；The RS485 serial ports that the RS485 serial ports of the temperature controller turns RS485 converters with the USB is connected.
- 3. system according to claim 1, it is characterised in that further include：The heating wire being arranged in the heating furnace, institute Power of controlled silicon module and heating wire is stated to connect with the power supply of 100~380VAC.
- 4. system according to claim 1, it is characterised in that the Labview includes：NI clients and VISA functions Storehouse, the VISA function libraries include：VISA reads function and VISA writes function.
- 5. system according to claim 1, it is characterised in that the RS232 serial ports of the industrial personal computer and the thermobalance RS232 serial ports connects.
- 6. according to the setting of the control interface of claim 1 ~ 5 any one of them system and display methods, it is characterised in that bag Include：The quality signal and temperature signal that the industrial personal computer is received in graph form real-time display in the control interface, The curve can be hidden, and the curve includes：Figure-of-merit curve, PV curves and SV curves；The time interval of record data is set in the control interface, records data；The mode of the record data includes：Hand Dynamic record and automatic record；Multistage temperature control is carried out in the control interface, realize ladder constant temperature in heating furnace, heating, operation, pause and Stop；To the parameter reading and writing of the temperature controller in the control interface；The thermobalance is controlled in the control interface, including：Switch, peeling, calibration and unit switching.
- 7. according to the method described in claim 6, it is characterized in that, further include：Shortcut, the first shortcut are Password Input frame Display and hidden function；Second shortcut is shown and hidden function for time shaft length input frame, can be with when input frame is shown The length of time shaft is set；3rd shortcut and the 4th shortcut be respectively time shaft when to subtract 0.5 small and plus 0.5 it is small when it is quick Key, it is operable in the case where time shaft output box is hidden.
- 8. according to the method described in claim 6, it is characterized in that, further include：Cryptoguard, recalls Password Input frame, input Password changes protected parameter, and the protected parameter is period temperature, period and the temperature control in multistage temperature control The write parameters of device processed；When inputting password mistake either no input password or Password Input frame hidden state, corresponding ginseng Number input frame is graying and is in disabling pattern, can not change the parameter.
- 9. according to the method described in claim 6, it is characterized in that, during the automatic record, manually recorded button disabling.
- 10. according to the method described in claim 6, it is characterized in that, the display interface refers to equipped with thermobalance stable state Show lamp, when indicator light is green, represent that thermobalance is weighed in stable state, when indicator light is red, expression thermobalance Weigh and play pendulum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711459811.8A CN107992125A (en) | 2017-12-28 | 2017-12-28 | A kind of control system and method for the thermogravimetric analysis experimental provision based on Labview |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711459811.8A CN107992125A (en) | 2017-12-28 | 2017-12-28 | A kind of control system and method for the thermogravimetric analysis experimental provision based on Labview |
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| Publication Number | Publication Date |
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| CN107992125A true CN107992125A (en) | 2018-05-04 |
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ID=62042157
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| CN201711459811.8A Pending CN107992125A (en) | 2017-12-28 | 2017-12-28 | A kind of control system and method for the thermogravimetric analysis experimental provision based on Labview |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113867445A (en) * | 2021-09-26 | 2021-12-31 | 华中科技大学 | Rapid heating system based on condensing heating and thermogravimetric analysis method |
-
2017
- 2017-12-28 CN CN201711459811.8A patent/CN107992125A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113867445A (en) * | 2021-09-26 | 2021-12-31 | 华中科技大学 | Rapid heating system based on condensing heating and thermogravimetric analysis method |
| CN113867445B (en) * | 2021-09-26 | 2022-11-15 | 华中科技大学 | Rapid heating system based on light-gathering heating and thermogravimetric analysis method |
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