CN106094931A - A kind of fast temperature control system towards gauze reactor - Google Patents
A kind of fast temperature control system towards gauze reactor Download PDFInfo
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- CN106094931A CN106094931A CN201610425782.2A CN201610425782A CN106094931A CN 106094931 A CN106094931 A CN 106094931A CN 201610425782 A CN201610425782 A CN 201610425782A CN 106094931 A CN106094931 A CN 106094931A
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- gauze
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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
- G05D23/2236—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 details of the regulator
- G05D23/224—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 details of the regulator using selfs or transformers
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Abstract
The invention belongs to technical field of temperature control, particularly relate to a kind of fast temperature control system towards gauze reactor.It is characterized in that, the controlled device of described system is gauze reactor, its temperature is gathered by thermocouple, the output signal of thermocouple is sent to key control unit after temperature transmitter carries out voltage transformation, key control unit calculates controlled quentity controlled variable and is input to power governor, exported to single-phase isolating transmitter by power governor again, control the actual power being added to gauze reactor two ends, form the temperature scaling factor of gauze reactor；Host computer monitoring software uses serial ports to connect and key control unit communication, and manual command and parameter are input to key control unit, and the temperature value of current thermocouple is refreshed display by key control unit on a display screen.Instant invention overcomes traditional method and need the defect of specialized designs laboratory table specific dc power actuator, overcome traditional experiment platform programming rate and only have the limitation of several fixing selection.
Description
Technical field
The invention belongs to technical field of temperature control, particularly relate to a kind of fast temperature towards gauze reactor and control system
System.
Background technology
Coal is the main energy sources of the world today, and coal fired power generation occupies absolute master in China's power generation for a long time
Leading status, Thermal generation unit installed capacity accounts for China's capacity of installed generator always more than 70%.The clean and effective burning of coal
The exploitation of new technique is the grand strategy of the sustainable development of China or even countries in the world.Large-scale power station coal-burning boiler uses substantially
Coal dust firing mode, coal dust burning in boiler is the quick reacting by heating process of (less than 1 second) the shortest.In order to deeply
Study pyrolysis and the combustion characteristics of coal under actual boiler heating condition, need to build this quick intensification of simulation at laboratory
Process also can be to this experiment porch being rapidly heated and controlling flexibly.Gauze reactor is exactly current optimal realization
The experimental provision of this experiment condition.During experiment, coal dust is placed on tinsel (line) on the net, and metal gauze heating power passes through temperature
Control system realizes the quick and variable temperature-rise period of gauze, thus the pyrolysis of the granular fuels such as studying coal powder and combustor
Reason.Exploitation temperature control more reliable gauze flexibly reactor is studied significant, at biology not only for the clean utilization of coal
The Related Research Domain such as matter fuel research also have wide practical use.At present, laboratory quick reacting by heating device is domestic only
Two: during heat energy system of Tsing-Hua University 2008, develop a platform, but the programming rate of this platform only has fixing several,
50 DEG C/s, 100 DEG C/s, 1000 DEG C/s, it is impossible to arbitrarily debug, and heat and can only once complete, its highest firing rate is only only
1000 DEG C/s, and the power governor part employing dc power actuator of this system, design debugging process is lengthy and tedious, and system is not
Preferably replicate and extend.Department of Automation of Shanghai Communications University develops the gauze reactor high speed realized based on labview for 2015
Temperature elevation system, it is achieved process is simple, and the construction cycle is short, but this system only shows that the maximum programming rate that can reach is 700
DEG C/s, and need special-purpose computer support, and also the speed of service limitation of labview software is big, is unsuitable for high-speed heating mistake
Process control.In consideration of it, the present invention seeks to open one to be capable of quick reacting by heating device, and firing rate is versatile and flexible,
The control system that experimental situation is safe and reliable.
Summary of the invention
In order to solve the problems referred to above, a kind of fast temperature control system towards gauze reactor of the present invention, its feature exists
In, including:
Key control unit is for realizing the analog digital conversion of temperature signal, the digital-to-analogue conversion of control signal, and core control
Algorithm processed；
Sensing transducing unit includes thermocouple and temperature transmitter, for Real-time Collection temperature signal, and by temperature signal
It is converted into the voltage signal that key control unit can accept；
Actuator includes power governor and single-phase isolating transformer, for the control letter produced by key control unit
Number output to power governor；
Man-machine interaction monitoring picture is realized by host computer monitoring software, for the monitoring of real-time temperature-rise period and input instruction
And parameter；
The controlled device of described system is gauze reactor, and the temperature of gauze reactor is responsible for collection, thermoelectricity by thermocouple
Even output signal carries out voltage transformation through temperature transmitter；It is then delivered to key control unit, is then controlled by core single
Unit calculates controlled quentity controlled variable and is input to power governor, then is exported to single-phase isolating transmitter by power governor, controls actual adding
To the power at gauze reactor two ends, thus reach to control the purpose of gauze temperature of reactor, form the temperature of gauze reactor
Closed loop control；Host computer monitoring software uses serial ports to connect and key control unit communication, manual command and parameter is input to
Key control unit, the temperature value of current thermocouple is refreshed display in OLED display screen by key control unit, it is achieved mistake
The monitoring of journey.
Described key control unit is ARM control chip, including built-in A/D and D/A converter, and based on operation system
The control algolithm of system, the time parameter of ARM control chip is better than the requirement controlled rapidity.
The output signal of described temperature transmitter is compatible with the voltage of the respective pins of the key control unit being connected；Institute
State temperature transmitter response speed want can be with the requirement of satisfied control rapidity.
The typing of described thermocouple is chosen and is determined by the working temperature typical scope of gauze reactor, and working temperature typical exists
600 DEG C～1000 DEG C, then select K-type thermocouple；At 1000 DEG C～1300 DEG C, select S type thermocouple；At 1000 DEG C～1600
DEG C, select L-type thermocouple；Thermocouple diameter its thermal response speed the thinnest is the best, is more advantageously implemented and is rapidly heated.
Described temperature transmitter receives thermocouple output signal, is then amplified, filters, becomes 0-through level conversion
3.3V exports, and from tape input, the quarantine measures of outlet side, in order to avoid signal interacts.The response speed of temperature transmitter is more
Fast being more advantageously implemented is rapidly heated.
Described temperature transmitter uses three grades of isolation: input signal isolation, output signal isolation and digital and analogue signals are isolated, energy
Enough effectively reduce noise.
Described power governor is used for adjusting the real output of single-phase isolating transformer, uses AC power actuator
Realizing, the response speed of power governor to meet the requirement controlling rapidity in real time.
Within the scope of on the one hand dangerous voltage is depressured to safe voltage by described single-phase isolating transformer, still further aspect will
Realize electrical isolation between primary winding and secondary coil, thus protect the safety of gauze reactor and experiment operator；
The rated power of single-phase isolating transformer determines according to the programming rate of gauze reactor.
Described man-machine interaction monitoring interface can be in real time with the formal intuition ground display temperature-rise period of curve, it is simple to prison
Survey.
The input of described power governor is directly connected with single-phase electricity on wall, the outfan of power governor with single-phase every
Connect from the input primary winding side of transformator, and the secondary coil side of single-phase isolating transformer is safety operation low-voltage, with
Gauze reactor connects, and above connection broadly falls into forceful electric power signal and connects, and needs to be attached with copper core cable；Power governor
Control signal end be connected with the outfan of key control unit, connection here be weak electric signal connect, special with electronic circuit
Connect with line.
The highest programming rate of described temperature control system is 1700 DEG C/s.
Beneficial effect
(1) realize simply, fast, convenient reproduction.The present invention utilizes AC power actuator SCR to realize, thus overcomes
Traditional method needs the defect of specialized designs laboratory table specific dc power actuator, so that control system realizes letter
Single, fast.
(2) programming rate is the most adjustable.The method that the present invention is announced can realize arbitrary speed within the specific limits
It is rapidly heated, thus overcomes traditional experiment platform programming rate and only have the limitation of several fixing selection.
(3) it is rapidly heated and can carry out in two stages.The method that the present invention announces is capable of rapid heating condition and divides two
The individual stage is carried out, and elder generation is rapidly heated according to first heating rate after first aim temperature, maintains certain stable rank
Section, is rapidly heated second target temperature according still further to second heating rate, and remains stable.
(4) the highest programming rate reaches 1700 DEG C/s.The highest programming rate of system of the present invention can reach 1700 DEG C per second/
S, is the control system scheme of the gauze reactor of the most domestic the highest heating rate that can reach.
Accompanying drawing explanation
Fig. 1 is the structure chart of gauze reactor experimental platform system
Fig. 2 is the gauze reactor control system topological diagram of the present invention；
Fig. 3 is the task scheduling block diagram of ARM chip in the present invention；
Fig. 4 is upper computer software surface chart.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is elaborated.
The method of the present invention is applied to gauze reactor experimental platform system, and this system can simulate boiler heating mistake
Journey, carries out coal powder performance analysis.Fig. 1 is the structure chart of gauze reactor experimental platform system.Fig. 2 is the gauze reaction of the present invention
Device control system topological diagram；A kind of fast temperature control system towards gauze reactor, it is characterised in that including:
Key control unit is for realizing the analog digital conversion of temperature signal, the digital-to-analogue conversion of control signal, and core control
Algorithm processed；
Sensing transducing unit includes thermocouple and temperature transmitter, for Real-time Collection temperature signal, and by temperature signal
It is converted into the voltage signal that key control unit can accept；
Actuator includes power governor and single-phase isolating transformer, for the control letter produced by key control unit
Number output to power governor；
Man-machine interaction monitoring picture is realized by host computer monitoring software, for the monitoring of real-time temperature-rise period and input instruction
And parameter；
The controlled device of described system is gauze reactor, and the temperature of gauze reactor is responsible for collection, thermoelectricity by thermocouple
Even output signal carries out voltage transformation through temperature transmitter；It is then delivered to key control unit, is then controlled by core single
Unit calculates controlled quentity controlled variable and is input to power governor, then is exported to isolating transmitter by power governor, controls actual to be added to line
The power at net reactor two ends, thus reach to control the purpose of gauze temperature of reactor, form the temperature closed loop of gauze reactor
Control；Host computer monitoring software uses serial ports to connect and key control unit communication, and manual command and parameter are input to core
Control unit, the temperature value of current thermocouple is refreshed display in OLED display screen by key control unit, it is achieved process
Monitoring.
Described key control unit is ARM control chip, including built-in A/D and D/A converter, and based on operation system
The control algolithm of system, the time parameter of ARM control chip is better than the requirement controlled rapidity.In ARM control chip, base
In embedded real-time operating system Freescale MQXTMLite, use FIFO task scheduling mode based on priority, its
Business scheduling block diagram is as shown in Figure 3.The core control program realized based on ARM is largely divided into four tasks, and these four tasks are pressed
It is followed successively by according to priority orders order from high to low:
Task 1, reception host computer instruction, these instructions include beginning to warm up/stop heating instructions, different patterns (is adjusted
Heating/the zone heating of die trial formula/directly export control/individually etc.) selection and target temperature, target velocity parameter is set.
Task 2, the temperature data of process reading are also adjusted output.Concrete process and calculating process see accompanying drawing 4.
Task 3, Current Temperatures passback host computer, shows current gauze temperature of reactor, it is simple to see objectively in real time
Examine whole temperature-rise period, and determine programming rate.
Task 4, the OLED display screen that refreshes, the current gauze temperature of reactor of real-time display, it is simple to read temperature at any time.
These four tasks, according to priority, take CPU time slice according to the principle of FIFO, thus complete reality based on ARM
Time control process.
The output signal of described temperature transmitter is compatible with the voltage of the respective pins of the key control unit being connected；Institute
State temperature transmitter response speed want can be with the requirement of satisfied control rapidity.
The typing of described thermocouple is chosen and is determined by the working temperature typical scope of gauze reactor, and working temperature typical exists
600 DEG C～1000 DEG C, then select K-type thermocouple；At 1000 DEG C～1300 DEG C, select S type thermocouple；At 1000 DEG C～1600
DEG C, select L-type thermocouple；Thermocouple diameter its thermal response speed the thinnest is the best, is more advantageously implemented and is rapidly heated.
Described temperature transmitter receives thermocouple output signal, is then amplified, filters, becomes 0-through level conversion
3.3V exports, and from tape input, the quarantine measures of outlet side, in order to avoid signal interacts.The response speed of temperature transmitter is more
Fast being more advantageously implemented is rapidly heated.
Described temperature transmitter uses three grades of isolation: input signal isolation, output signal isolation and digital and analogue signals are isolated, energy
Enough effectively reduce noise.
Described power governor is used for adjusting the real output of single-phase isolating transformer, uses AC power actuator
Realizing, the response speed of power governor to meet the requirement controlling rapidity in real time.
Within the scope of on the one hand dangerous voltage is depressured to safe voltage by described single-phase isolating transformer, still further aspect will
Realize electrical isolation between primary winding and secondary coil, thus protect the safety of gauze reactor and experiment operator；
The rated power of single-phase isolating transformer determines according to the programming rate of gauze reactor.In principle, intensification speed to be realized
Spend the highest, then require that moment is applied to the power of gauze reactor the biggest.The rated power selecting isolating transformer should leave
Certain surplus.
Described man-machine interaction monitoring interface can be in real time with the formal intuition ground display temperature-rise period of curve, it is simple to prison
Survey.Host computer uses based on C# exploit person machine interactive interface.It is relative that the application software developed is packaged into .exe executable program
The least, run execution efficiency the highest.Thus avoid the dependence to third party software.Host computer is mainly responsible for monitoring temperature-rise period
And instruction input.
The input of described power governor is directly connected with single-phase electricity on wall, the outfan of power governor with single-phase every
Connect from the input primary winding side of transformator, and the secondary coil side of single-phase isolating transformer is safety operation low-voltage, with
Gauze reactor connects, and above connection broadly falls into forceful electric power signal and connects, and needs to be attached with copper core cable；Power governor
Control signal end be connected with the outfan of key control unit, connection here be weak electric signal connect, special with electronic circuit
Connect with line.
The step provided according to the present invention, result of implementation is as follows:
Using PC as temperature-rise period monitoring system, with the chip Kinetis KL25MCU of freescale (Freescale)
As ARM control chip, this MCU chip uses 32 ARM Cortex-M0+ kernels of a new generation, has and has concurrently with low-power consumption at a high speed
Feature, be equipped on Freescale MQXTMLite real time operating system, this operating system has the spies such as ultralight amount and low-power consumption
Point.
Select the silicon control single phase power governor SY-1-2-50T conduct of the good dynamo-electric company limited in Dongguan, Guangdong city
The power governor of native system, controls input voltage range 0-3.3v, exports 0-24V alternating voltage.
Isolating transformer selects the single-phase isolating transformer of 220V/24v of Beijing Prose torr International Electrical company limited, volume
Determining power is 10kw.
Temperature transmitter selects the intelligent integral temperature transmitter of Jinzhou precise and tiny finite instrument company, tape input, output
Insulation blocking, input temp 0-1200 DEG C/s, output voltage range 0-3.3V.
Thermocouple use K-type thermocouple wire that Britain Good Fellow company produces (NI095120Ni90/Cr10,
NI105120Ni95/ (Al+Mn+Si) 5), diameter 50 μm, thus ensure that the rapidity of thermometric.
Upper computer software interface as shown in Figure 4, relates to beginning to warm up/stopping heating instructions, different heating model selection, mesh
Mark temperature, target velocity sets, and some fine setting parameters.
Interpretation of result
The control system that is rapidly heated of gauze reactor according to embodiments of the present invention has the advantage that
1) operational efficiency of software is high.The implementation that the present invention describes need not the such third-party application of labview
Software, it is only necessary to the application software package developed is copied on used computer, can use.
2) extensibility is good.Corresponding C# development environment, and kinetis development environment are installed, it is possible at any time revision and
Increase and decrease function.
3) design is simple, quick, convenient popularization.The hardware system that the present invention builds is all to use third-party product, is not required to
Want the hardware circuit of design specialized, thus design process can be greatly shortened, convenient popularization.
Claims (10)
1. the fast temperature control system towards gauze reactor, it is characterised in that including:
Key control unit controls to calculate for realizing the analog digital conversion of temperature signal, the digital-to-analogue conversion of control signal, and core
Method；
Sensing transducing unit includes thermocouple and temperature transmitter, for Real-time Collection temperature signal, and is changed by temperature signal
Become the voltage signal that key control unit can accept；
Power controller includes power governor and single-phase isolating transformer, and the actuator controlled as power, by core control
The control signal that unit processed produces exports to power governor, and is controlled the temperature of gauze reactor by unidirectional isolating transformer
Degree；
Man-machine interaction monitoring unit includes host computer and OLED display screen, and monitored picture is realized by host computer monitoring software, is used for
Temperature-rise period monitoring in real time and input instruct and parameter；
The controlled device of described system is gauze reactor, and the temperature of gauze reactor is gathered by thermocouple, the output of thermocouple
Signal is sent to key control unit after temperature transmitter carries out voltage transformation, and key control unit calculates controlled quentity controlled variable input
To power governor, then exported to single-phase isolating transformer by power governor, control the actual gauze reactor two ends that are added to
Power, thus reach to control the purpose of gauze temperature of reactor, form the temperature scaling factor of gauze reactor；Host computer uses
Serial ports connects and key control unit communication, and manual command and parameter are input to key control unit, and key control unit will
The temperature value of current thermocouple refreshes display in OLED display screen, it is achieved the monitoring of process.
A kind of fast temperature control system towards gauze reactor the most according to claim 1, it is characterised in that described
Key control unit is ARM control chip, and including built-in A/D and D/A converter, and control based on operating system is calculated
Method, the time parameter of ARM control chip meets the requirement controlling rapidity.
A kind of fast temperature control system towards gauze reactor the most according to claim 1, it is characterised in that described
The output signal of temperature transmitter is compatible with the voltage of the respective pins of the key control unit being connected；Described temperature transmitter
Response speed meet control rapidity requirement.
A kind of fast temperature control system towards gauze reactor the most according to claim 1, it is characterised in that described
The typing of thermocouple is chosen and is determined by the working temperature typical scope of gauze reactor, if working temperature typical at 600 DEG C～
1000 DEG C, then select K-type thermocouple；If working temperature typical is at 1000 DEG C～1300 DEG C, then select S type thermocouple；If
Working temperature typical at 1000 DEG C～1600 DEG C, then selects L-type thermocouple.
A kind of fast temperature control system towards gauze reactor the most according to claim 1, it is characterised in that described
Temperature transmitter receives thermocouple output signal, is then amplified, filters, becomes 0-3.3V to export through level conversion, and
From tape input, the quarantine measures of outlet side, in order to avoid signal interacts；
Described temperature transmitter uses three grades of isolation: input signal isolation, output signal isolation and digital and analogue signals are isolated, it is possible to have
Effect reduces noise.
A kind of fast temperature control system towards gauze reactor the most according to claim 1, it is characterised in that described
Power governor is used for adjusting the real output of single-phase isolating transformer, uses AC power actuator to realize, and power is adjusted
The response speed of joint device meets the requirement controlling rapidity in real time.
A kind of fast temperature control system towards gauze reactor the most according to claim 1, it is characterised in that described
Within the scope of on the one hand dangerous voltage is depressured to safe voltage by single-phase isolating transformer, still further aspect is by primary winding and two
Realize electrical isolation between secondary coil, thus protect the safety of gauze reactor and experiment operator；Single-phase isolation transformation
The rated power of device determines according to the programming rate of gauze reactor.
A kind of fast temperature control system towards gauze reactor the most according to claim 1, it is characterised in that described
Man-machine interaction monitoring unit can be in real time with the formal intuition ground display temperature-rise period of curve, it is simple to monitoring.
A kind of fast temperature control system towards gauze reactor the most according to claim 1, it is characterised in that described
The input of power governor is directly connected with single-phase electricity on wall, and the outfan of power governor is defeated with single-phase isolating transformer
Enter primary winding side to connect, and the secondary coil side of single-phase isolating transformer is safety operation low-voltage, with gauze reactor even
Connecing, above connection copper core cable realizes forceful electric power signal and connects；The control signal end of power governor and key control unit
Outfan electronic circuit dedicated connection realize weak electric signal connect.
A kind of fast temperature control system towards gauze reactor the most according to claim 1, it is characterised in that institute
The highest programming rate stating temperature control system is 1700 DEG C/s.
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| CN108062129A (en) * | 2017-12-25 | 2018-05-22 | 哈尔滨工业大学 | A kind of temperature control method and its system of gauze reactor |
| CN108089616A (en) * | 2017-12-25 | 2018-05-29 | 哈尔滨工业大学 | A kind of humidity control system of gauze reactor |
| CN110806766A (en) * | 2019-11-29 | 2020-02-18 | 衡阳鸿宇机械制造有限公司 | Automatic control instrument for heat treatment and use method thereof |
| CN115237181A (en) * | 2022-08-19 | 2022-10-25 | 中国人民解放军海军工程大学 | Gas turbine temperature monitoring and fault simulation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108062129A (en) * | 2017-12-25 | 2018-05-22 | 哈尔滨工业大学 | A kind of temperature control method and its system of gauze reactor |
| CN108089616A (en) * | 2017-12-25 | 2018-05-29 | 哈尔滨工业大学 | A kind of humidity control system of gauze reactor |
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| CN115237181A (en) * | 2022-08-19 | 2022-10-25 | 中国人民解放军海军工程大学 | Gas turbine temperature monitoring and fault simulation system |
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| Publication number | Publication date |
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| CN106094931B (en) | 2017-12-29 |
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