CN109582060A - A kind of intelligent control system of liquid bath temperature control device - Google Patents
A kind of intelligent control system of liquid bath temperature control device Download PDFInfo
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Abstract
The invention discloses a kind of intelligent control systems of liquid bath temperature control device, using temperature control instrument as core controller component, based on temperature control instrument development temperature curve high-precision control algorithm, the power that heating element is controlled using solid-state relay duty ratio realizes heating process control；The make-and-break time that cooling element is controlled using solid-state relay duty ratio realizes cooling procedure control, the power transmission and power-off automatic control function for having the liquid bath temperature control device realized by relay-contactor circuit, heating start-up and shut-down control function is realized by the heating element heats power duty cycle that thyristor controls, cooling start-up and shut-down control function is realized by cooling element duty ratio cooling time that thyristor controls, have dual sensor and two temperature observing and controlling circuit, the present invention can meet the application demand of a variety of pairs of Temperature Treatment technique, suitable for temperature processes, dangerous and temperature controlled processes are high-precision degree type, it needs to remotely operate, the occasion of technological parameter complexity.
Description
Technical field
The present invention relates to intelligent temperature control technical field, in particular to a kind of intelligent control system of liquid bath temperature control device.
Background technique
Liquid bath temperature environment is wide in the fields of industrial manufacturing such as material manufacture, food chemistry, biology and environmental test field
General application, temperature control precision determine the manufacturing quality of industrial products, also determine the accurate of environmental test process testing data
Property.Compared to pressure and flow control system, temperature control system has the characteristics that big inertia, big delay, this directly contributes height
Being rapidly heated for the temperature curve control of precision is larger with the temperature of cooling system control difficulty.
Currently, certain technique need to realize that the liquid bath environment temperature under liquid bath environment is rapidly heated and cools down, control precision is up to
± 0.05 DEG C, and require to realize heating and temperature-fall period according to setting curve controlled temperature, the temperature of single technical process is continuous
Controlling curve quantity is not less than 100.
Existing liquid bath temperature control system can only realize the temperature control of target termination temperature value and temperature control precision
It is relatively low, it cannot achieve the high-precision temperature curve controlled of temperature changing process, also cannot achieve the continuous set temperature song of multistage
Line sequentially controls automatically and does not have the background intelligent management function of temperature data in temperature control process.
To construct a set of low cost, intelligent liquid bath temperature control equipment, the multistage temperature of temperature process process is realized
Setting curve continuously sequentially controls, controls the background intelligent data management that precision reaches ± 0.05 DEG C, temperature data can be achieved
Function need to invent a kind of advanced in performance, low in cost, functional intellectualization liquid bath temperature control system.
Summary of the invention
It is insufficient in above-mentioned background technique the purpose of the present invention is overcoming, a kind of intelligentized control method of liquid bath temperature control device is provided
System specifically includes the design of heating cooling body, the design of temperature control system, intelligent integrated temperature of liquid bath temperature control device
Controlling software design and high accuracy temperature control algorithm design method.
In order to reach above-mentioned technical effect, the present invention takes following technical scheme:
Firstly, should at least meet the invention discloses a kind of heating cooling body design requirement of liquid bath device: liquid bath dress
It sets and the temperature process process being heated or cooled is realized as liquid media using Medium Oil or water；The heating of liquid bath temperature control device
Cooling body functionally at least needs to have heating element, circulating element in cooling device and liquid bath, and heating element need to meet liquid bath
The most fast heating rate demand for control of device, cooling device need to meet the most fast cooling rate demand for control of liquid bath device.
Meanwhile the design requirement of the intelligent control system for the liquid bath temperature control device, it should at least meet: have liquid bath
The power transmission and power-off automatic control function of temperature control device；Have two temperature measurement circuit, it is another all the way for temperature control measurement
Road is measured for temperature alarming；Have level gauging defencive function, has temperature controller, and solid-state relay is controlled by controller
Device duty ratio realizes that heating is controlled with cooling procedure to control the duty ratio of heating element or cooling element；Have control to calculate
Machine, computer run integrated multi-functional control software.
Wherein, for the design requirement of integrated multi-functional control software, should at least meet: computer control software uses
Computer configuration software etc. has the software realization of human-computer interaction function；Computer software has the communications protocol of intelligence instrument,
It can be achieved and the parameter real time bidirectional of intelligence instrument, wide bandwidth transmission；Computer configuration software have collection process start-up and shut-down control,
Temperature control curve setting, temperature controlled processes curve monitoring, temperature data historical storage and inquiry export etc. functions.
Meanwhile the invention also discloses the design requirement of fast-response high-precision temperature curve controlled algorithm, should at least meet:
Have temperature target fixed value control and program calculated value control function, is used for selection target stop value control function or process
High-precision curve control function；Have solid-state relay duty ratio selection constant function and program calculated value function, for selecting
Solid-state relay constant aperture is fixed during being heated or cooled or solid-state relay opening value function is calculated according to control algolithm
Energy；The large inertia of control algolithm reply temperature controlled processes, big delay have inhibiting effect, it can be achieved that being rapidly heated and cooling function
Energy；Control algolithm reply temperature control has predicting function, can the temperature controlled heating of feedforward control and temperature-fall period.
For the heating cooling body design requirement of above-mentioned liquid bath device, the invention discloses a kind of low cost intelligent types
Liquid bath temperature control device design, specifically include:
1) liquid bath device uses Medium Oil, water or other liquid medias, realizes the temperature process process being heated or cooled；Tool
Body, liquid media should be as far as possible using the not material of evaporation type or a small amount of evaporation type；
2) liquid bath temperature control device at least have heating element, circulating element in cooling device and liquid bath；Heating element, cooling
Component, medium circulation component are by rational deployment, to realize that the temperature for fast implementing liquid bath working region is constant, such as in liquid bath
Heating element, cooling-part be set simultaneously on the two sidewalls of temperature slot, realize from two sides simultaneously to the heating of liquid media or
Cooling, medium circulation component is then set to the middle part of liquid bath temperature slot slot bottom, to be sufficiently mixed the liquid matchmaker for being heated or cooling down
It is situated between, wherein heating element meets the most fast heating rate demand for control of liquid bath temperature control device, and cooling device need to meet liquid bath temperature control
The most fast cooling rate demand for control of device；
3) circulating element is matched with heating speed, cooling velocity in liquid bath, to minimize the delay time of temperature control system
Characteristic；Heating element is run always with circulating element in liquid bath in cooling device operational process, real currently designed delay time
It is interior by liquid bath equalizing temperature；
4) liquid bath temperature control device temperature sensor is specifically laid in the edge in Temperature Treatment region using flexible arrangement
Position can prevent sensor for temperature processing working region from generating the temperature of interference and liquid bath temperature slot；
5) it is also laid with liquid level sensor in liquid bath temperature control device, prevents liquid level reduction from causing functions of the equipments imperfect or pacifying
Full accident.
For the design requirement of the temperature control system of the heating and cooling system of above-mentioned liquid bath temperature control device, present invention tool
Body discloses a kind of design of the intelligent control system of the liquid bath temperature control device of low cost intelligent type, specifically includes:
1) temperature control system at least has the power transmission for the liquid bath temperature control device realized by relay-contactor circuit
With power-off automatic control function, has and heating start-up and shut-down control function is realized by the heating element duty ratio that thyristor controls
Can, and have and cooling start-up and shut-down control function is realized by the cooling element duty ratio that thyristor controls, to both realize
Electrical Safety control to equipment, and realize the control of temperature process control process；
2) at least have dual sensor and two temperature measures circuit, two sensors are laid in the temperature of liquid bath temperature control device
Handle working region；Measurement sensor is controlled for temperature all the way, and another way sensor is used for temperature alarming；Two sensors
Lay for judge automatically liquid bath temperature control device whether failure；By cutting heating electric loop when temperature is more than preset value, and with
Sound-light alarm mode notifies operator；
3) has level gauging defencive function, cooling electric loop is heated in cutting after liquid level is lower than lower limit, and with acousto-optic report
Police's formula notifies operator；
4) temperature controlled processes are based on temperature control instrument development temperature curve using temperature control instrument as core controller
High-precision control algorithm；By temperature control system by real-time temperature values cut-in temperature control instrument, pass through temperature control instrument
Temperature curve high-precision control algorithm calculate solid-state relay output valve and export to solid-state relay, temperature alarming process
Then using alarming instrument as core controller；
5) power that heating element is controlled using solid-state relay duty ratio realizes heating process control；It is solid using control
State relay duty ratio controls the make-and-break time of cooling element, and then realizes cooling procedure control；Wherein, solid-state relay
Duty ratio control is realized using temperature control instrument；
6) has control computer, computer runs integrated multi-functional control software, and control computer and temperature control
Instrument is realized using Modbus communication protocol and is communicated by serial communication interface.
Meanwhile the invention also discloses the implementation method of above-mentioned integrated multi-functional control software, specifically include:
1) the communication function implementation method of integrated multi-functional control software and temperature control system: temperature control instrument with
Alarming instrument is provided with serial communication interface, using the communications protocol of standard, and provide SDK (Software Develop Kit,
Software Development Tools) file；Integrated multi-functional control software has the communication driving interface and agreement of intelligence instrument, can pass through
SDK file realizes the variable (variable containing logic control switch, analogue data variable etc.) on integrated multi-functional control software
The access and control of the variable of intelligent control instrument；
2) integrated multi-functional control software implementation method: real-time biography has been included at least in integrated multi-functional control software
Sensor data are shown and curve is shown and state indicator module, device parameter setup module, technological parameter setup module, history number
It is investigated that inquiry and export module etc.；
3) real time sensor data is shown, curve shows that with the module at state instruction interface include: control instrument and alarm
The realtime curve unit of instrument, the alarm temperature value of alarming instrument are shown and alarm lamp indicating unit；For display control
Total number of segment of instrument, current number of segment, when leading portion control the time, when leading portion control temperature, when leading portion real time temperature, when leading portion is kept the temperature
The display unit of calendar scheduling data；Wherein, it when carrying out the display of control instrument working status indication, specifically includes: ascent stage, platform
Section, descending branch are shown；And real time sensor data is shown, curve show with the module at state instruction interface in, real time sensor
The display of curve is realized using XY Curve Controls, includes that scenario earthquake is shown, real time temperature curve is to set temperature song
The tracking display of line；
4) device parameter setup module includes:
The basic function setting unit of equipment restriction, the restriction parameter set unit applied to intelligent curve controlled, control
Algorithm parameter processed limits setting unit；
Equipment limit basic function setting unit include curve number setting unit, curve execute number setting unit,
Starting mode setting unit, chronomere's setting unit, temperature upper limit and lower limit setting unit etc.；Applied to intelligent curve control
The restriction parameter set unit of system includes: that temperature target customization control and program calculate target control value mode selecting unit,
Solid-state relay aperture customization control calculates opening value control unit with program, and temperature target customizes controlling value setting unit,
Solid-state relay aperture customizes controlling value setting unit；It includes proportional band parameter setting list that control algolithm parameter, which limits setting unit,
Member, integrates initial value setup unit manually, is sensitive time of integration parameter setting unit, derivative time parameter setting unit
Spend setup unit, output valve upper limit value, output valve lower limit value setup unit etc.；
5) technological parameter setup module include: temperature number of segment setup unit, initial temperature setup unit, every step target temperature
Spend the parameter setting unit of setup unit, every step process time；
6) the inquiry of historical data and export module include: the time graph setting unit of inquiry, time interval setting unit,
It inquires data and shows chart unit, inquiry chart clearing cell, chart data lead-out unit etc..
The invention also discloses the above-mentioned temperature control algorithms embedded in temperature control instrument, specifically include:
The temperature control algorithm, which specifically has, realizes that target temperature direct control function, control algolithm calculate temperature and controlled
Cheng Gongneng, setting solid-state relay duty ratio control function, control algolithm calculate the four of solid-state relay duty ratio control function
Kind of control algolithm is specific as follows, it can be achieved that different control purpose:
1) control method of target temperature direct control function is realized are as follows: using fixed temperature as controlled object temperature, pass through
Control algolithm calculates the duty ratio of solid-state relay in real time, realizes temperature scaling factor；The characteristics of control method, is: only controlling
Target temperature, control process, not can be used for Quick-type, the control of target temperature high precision；
2) realize that control algolithm calculates the control method of temperature controlled processes function are as follows: according to the termination mesh being heated or cooled
Mark temperature and process time calculate controlled object temperature in real time, calculate the duty ratio of solid-state relay in real time by control algolithm,
Realize temperature scaling factor；The characteristics of control method is: control heating or cooling procedure are, it can be achieved that according to set temperature song
Line realizes the control of target temperature high precision；
Wherein, it is calculated in real time according to the termination target temperature being heated or cooled with process time specific when controlled object temperature
The algorithm of use are as follows:
Wherein, Ts0For heating or cooling procedure initial temperature value, unit: DEG C
TsaFor the target temperature value that process is heated or cooled, unit: DEG C
tproFor the control time that process is heated or cooled, unit: Min
T is the elapsed-time standards after self-heating or cooling procedure starting, unit: Min
Ts(t) for the real-time target temperature that process corresponds to the time is heated or cooled, unit: DEG C；
3) control method of setting solid-state relay duty ratio control function is realized are as follows: after process starting is heated or cooled,
It rule of thumb sets the duty ratio of solid-state relay and temperature control process is constant, realize the control of solid-state relay duty ratio, reach mesh
Heating or cooling procedure are automatically stopped after mark temperature；The characteristics of control method, is: real-time without feedback in the control process
Temperature value cannot achieve the process of being heated or cooled according to set temperature controlling curve and realize control, is a kind of opened loop control process；
The control method can only realize the lower accuracy control process of target temperature；
4) realize that control algolithm calculates the control method of solid-state relay duty ratio control function are as follows: using target temperature as quilt
Controlling temperature, controller calculate the duty ratio of solid-state relay in real time, realize temperature scaling factor；The characteristics of control method, is:
Solid-state relay duty ratio real-time change in control process is, it can be achieved that target temperature high precision controls.
Specifically, calculating the control algolithm of the duty ratio of solid-state relay in real time in the above-mentioned technical solutions as a kind of band product
Divide the PID algorithm of initial value, specific formula for calculation are as follows:
Wherein:
U (t) is controller output quantity, unit are as follows: V；
u0To integrate initial value, unit are as follows: V；
E (t) is the error amount of real-time set temperature and real time temperature, unit are as follows: V；
KpFor proportionality coefficient, dimensionless；
TdFor derivative time, unit are as follows: s；
TiFor the time of integration, unit are as follows: s.
The ratio between controller output quantity and solid-state relay gamut determine the duty ratio of controlled element, and integral initial value is used for
Feedforward inhibits the big lag characteristic of temperature controlled processes, and proportionality coefficient is used to control the rapidity of temperature control algorithm, and derivative time is used
In the concussion performance for inhibiting controlled parameter, the time of integration for realizing control algolithm stability.
Compared with prior art, the present invention have it is below the utility model has the advantages that
The present invention provides a kind of temperature control equipment applied to liquid bath Temperature Treatment field and its high-performance temperature controls
Design method processed, can meet laboratory or industrial scientific production to the application demand of Temperature Treatment technique, particularly suitable
In temperature processes danger type and the high-precision degree type of temperature controlled processes, need remote operation, technological parameter be complicated, technical process can
Record demand.
Detailed description of the invention
Fig. 1 is the schematic diagram of the design principle of the intelligent control system of liquid bath temperature control device of the invention.
Fig. 2 is the Functional Design schematic diagram of integrated multi-functional control software of the invention.
Fig. 3 is the scheme of installation of the liquid bath temperature control device in one embodiment of the present of invention.
Description of symbols: 1 --- heating element；2 --- cooling device；3 --- temperature transducer；4 --- cooling valve；
5 --- circulating element；6 --- circulating pump；7 --- liquid level sensor.
Specific embodiment
Below with reference to the embodiment of the present invention, the invention will be further elaborated.
Embodiment:
As shown in Figure 1, a kind of intelligent control system of liquid bath temperature control device, which, which at least has, passes through relay
The power transmission and power-off automatic control function for the liquid bath temperature control device that device-contactor circuit is realized, have through thyristor control
The heating element duty ratio of system realizes heating start-up and shut-down control function, and has and accounted for by the cooling element that thyristor controls
Sky to not only realize the Electrical Safety control to equipment, but also realizes that temperature process controlled than realizing cooling start-up and shut-down control function
The control of journey.
Meanwhile the control system is also equipped with dual sensor and two temperature measures circuit, two sensors are laid in liquid bath temperature
Control the Temperature Treatment working region of device；Measurement sensor is controlled for temperature all the way, and another way sensor is used for temperature alarming；
The laying of two sensors for judge automatically liquid bath temperature control device whether failure；By cutting heating electricity when temperature is more than preset value
Air circuit, and operator is notified in a manner of sound-light alarm.
Preferably, the control system is also equipped with level gauging defencive function, liquid level is lower than cutting heating cooling after lower limit
Electric loop, and operator is notified in a manner of sound-light alarm.
Specifically, the temperature controlled processes of the control system are using temperature control instrument as core controller, temperature controller
Table embedded temperature control algolithm；By temperature control system by real-time temperature values cut-in temperature control instrument, controlled by temperature
The embedded temperature control algorithm of instrument calculates the output valve of solid-state relay and exports to solid-state relay, and temperature alarming process is then
Using alarming instrument as core controller.
Meanwhile the control system controlled using solid-state relay duty ratio heating element power realize it is heated program-controlled
System controls the make-and-break time of cooling element using control solid-state relay duty ratio, and then realizes cooling procedure control；Its
In, the duty ratio control of solid-state relay is realized using temperature control instrument.
Specifically, the above-mentioned temperature control algorithm embedded in temperature control instrument, which specifically has, realizes that target temperature directly controls
Function, control algolithm calculate temperature controlled processes function, setting solid-state relay duty ratio control function, control algolithm and calculate admittedly
Four kinds of control algolithms of state relay duty ratio control function are specific as follows, it can be achieved that different control purpose:
1) control method of target temperature direct control function is realized are as follows: using fixed temperature as controlled object temperature, pass through
Control algolithm calculates the duty ratio of solid-state relay in real time, realizes temperature scaling factor；The characteristics of control method, is: only controlling
Target temperature, control process, not can be used for Quick-type, the control of target temperature high precision；
2) realize that control algolithm calculates the control method of temperature controlled processes function are as follows: according to the termination mesh being heated or cooled
Mark temperature and process time calculate controlled object temperature in real time, calculate the duty ratio of solid-state relay in real time by control algolithm,
Realize temperature scaling factor；The characteristics of control method is: control heating or cooling procedure are, it can be achieved that according to set temperature song
Line realizes the control of target temperature high precision；
Wherein, it is calculated in real time according to the termination target temperature being heated or cooled with process time specific when controlled object temperature
The algorithm of use are as follows:
Wherein, Ts0For heating or cooling procedure initial temperature value, unit: DEG C
TsaFor the target temperature value that process is heated or cooled, unit: DEG C
tproFor the control time that process is heated or cooled, unit: Min
T is the elapsed-time standards after self-heating or cooling procedure starting, unit: Min
Ts(t) for the real-time target temperature that process corresponds to the time is heated or cooled, unit: DEG C；
3) control method of setting solid-state relay duty ratio control function is realized are as follows: after process starting is heated or cooled,
It rule of thumb sets the duty ratio of solid-state relay and temperature control process is constant, realize the control of solid-state relay duty ratio, reach mesh
Heating or cooling procedure are automatically stopped after mark temperature；The characteristics of control method, is: real-time without feedback in the control process
Temperature value cannot achieve the process of being heated or cooled according to set temperature controlling curve and realize control, is a kind of opened loop control process；
The control method can only realize the lower accuracy control process of target temperature；
4) realize that control algolithm calculates the control method of solid-state relay duty ratio control function are as follows: using target temperature as quilt
Controlling temperature, controller calculate the duty ratio of solid-state relay in real time, realize temperature scaling factor；The characteristics of control method, is:
Solid-state relay duty ratio real-time change in control process is, it can be achieved that target temperature high precision controls.
Specifically, calculating the control algolithm of the duty ratio of solid-state relay in real time in the above-mentioned technical solutions as a kind of band product
Divide the PID algorithm of initial value, specific formula for calculation are as follows:
Wherein:
U (t) is controller output quantity, unit are as follows: V；
u0To integrate initial value, unit are as follows: V；
E (t) is the error amount of real-time set temperature and real time temperature, unit are as follows: V；
KpFor proportionality coefficient, dimensionless；
TdFor derivative time, unit are as follows: s；
TiFor the time of integration, unit are as follows: s.
The ratio between controller output quantity and solid-state relay gamut determine the duty ratio of controlled element, and integral initial value is used for
Feedforward inhibits the big lag characteristic of temperature controlled processes, and proportionality coefficient is used to control the rapidity of temperature control algorithm, and derivative time is used
In the concussion performance for inhibiting controlled parameter, the time of integration for realizing control algolithm stability.
In the present embodiment, which has control computer, and computer runs integrated multi-functional control software, control
Computer processed and temperature control instrument are realized using Modbus communication protocol and are communicated by serial communication interface.
Meanwhile the design method of above-mentioned integrated multi-functional control software is also disclosed in the present embodiment, as shown in Fig. 2,
It specifically includes:
1) the communication function implementation method of integrated multi-functional control software and temperature control system: temperature control instrument with
Alarming instrument is provided with serial communication interface, using the communications protocol of standard, and provide SDK (Software Develop Kit,
Software Development Tools) file；Integrated multi-functional control software has the communication driving interface and agreement of intelligence instrument, can pass through
SDK file realizes the variable (variable containing logic control switch, analogue data variable etc.) on integrated multi-functional control software
The access and control of the variable of intelligent control instrument；
2) integrated multi-functional control software implementation method: real-time biography has been included at least in integrated multi-functional control software
Sensor data are shown and curve is shown and state indicator module, device parameter setup module, technological parameter setup module, history number
It is investigated that inquiry and export module etc.；
3) real time sensor data is shown, curve shows that with the module at state instruction interface include: control instrument and alarm
The realtime curve unit of instrument, the alarm temperature value of alarming instrument are shown and alarm lamp indicating unit；For display control
Total number of segment of instrument, current number of segment, when leading portion control the time, when leading portion control temperature, when leading portion real time temperature, when leading portion is kept the temperature
The display unit of calendar scheduling data；Wherein, it when carrying out the display of control instrument working status indication, specifically includes: ascent stage, platform
Section, descending branch are shown；And real time sensor data is shown, curve show with the module at state instruction interface in, real time sensor
The display of curve is realized using XY Curve Controls, includes that scenario earthquake is shown, real time temperature curve is to set temperature song
The tracking display of line；
4) device parameter setup module includes:
The basic function setting unit of equipment restriction, the restriction parameter set unit applied to intelligent curve controlled, control
Algorithm parameter processed limits setting unit；
Equipment limit basic function setting unit include curve number setting unit, curve execute number setting unit,
Starting mode setting unit, chronomere's setting unit, temperature upper limit and lower limit setting unit etc.；Applied to intelligent curve control
The restriction parameter set unit of system includes: that temperature target customization control and program calculate target control value mode selecting unit,
Solid-state relay aperture customization control calculates opening value control unit with program, and temperature target customizes controlling value setting unit,
Solid-state relay aperture customizes controlling value setting unit；It includes proportional band parameter setting list that control algolithm parameter, which limits setting unit,
Member, integrates initial value setup unit manually, is sensitive time of integration parameter setting unit, derivative time parameter setting unit
Spend setup unit, output valve upper limit value, output valve lower limit value setup unit etc.；
5) technological parameter setup module include: temperature number of segment setup unit, initial temperature setup unit, every step target temperature
Spend the parameter setting unit of setup unit, every step process time；
6) the inquiry of historical data and export module include: the time graph setting unit of inquiry, time interval setting unit,
It inquires data and shows chart unit, inquiry chart clearing cell, chart data lead-out unit etc..
A kind of structure design of adoptable liquid bath temperature control device is also disclosed in the present embodiment, is specifically included:
Liquid bath device uses Medium Oil, water or other liquid medias, realizes the temperature process process being heated or cooled；Specifically
, liquid media should be as far as possible using the not material of evaporation type or a small amount of evaporation type；
Liquid bath temperature control device at least has heating element, circulating element in cooling device and liquid bath；Heating element, cooling dress
Set, medium circulation component is by rational deployment, to realize that the temperature for fast implementing liquid bath working region is constant, wherein heating
Element meets the most fast heating rate demand for control of liquid bath temperature control device, and cooling device need to meet the most fast drop of liquid bath temperature control device
Warm speed control demand.
As shown in figure 3, it is provided with heating element 1, cooling device 2 simultaneously on the two sidewalls of liquid bath temperature slot, thus
It realizes the heating or cooling to liquid media simultaneously from two sides, cooling valve 4, medium circulation is installed in the control terminal of cooling element
Component specifically includes circulating element 5, circulating pump 6,6 control loop element of circulating pump, 5 cycle rotation, and circulating element is set to liquid bath temperature
The middle part for spending slot slot bottom, to be sufficiently mixed the liquid media for being heated or cooling down.
Meanwhile circulating element is matched with the heating speed of heating element, cooling device cooling velocity in liquid bath, to subtract as far as possible
The delay-time characteristic of small temperature control system；Heating element is run always with circulating element in liquid bath in cooling device operational process,
By liquid bath equalizing temperature in real currently designed delay time.
The temperature transducer 3 of the intelligent control system of liquid bath temperature control device is in liquid bath temperature control device using flexible arrangement
Mode such as can specifically be laid in the marginal position in Temperature Treatment region, can prevent sensor for temperature processing working region from producing
Raw interference, and can accurately reflect the temperature of liquid bath temperature slot；
Meanwhile liquid level sensor 7 is also laid in liquid bath temperature control device, prevent liquid level reduction from causing functions of the equipments imperfect
Or safety accident.
Technical solution of the present invention has been actually applied, and according to the technique and scheme of the present invention, is devised a set of compound containing energy
Material internal stress slow releaser, specifically using integrated multi-action computer control software realization of the invention heating with
Export and control is automatically stored with real time monitoring, process data in cooling automatic process parameter setting, operational process remote operation
Etc. functions, realize in heating and cooling procedure oil bath temperature according to setting curve linear using intelligent control algorithm of the invention
Control, control precision is ± 0.05 DEG C reachable, ± 0.1 DEG C~± 1 DEG C of heating cooling procedure speed covering, real meaning can be achieved
High-precision temperature curve controlled.The device is successfully applied to composite material containing energy internal stress slow release technique, improves containing energy
The strength level of composite material obtains good application effect.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of intelligent control system of liquid bath temperature control device, which is characterized in that the intelligent control of the liquid bath temperature control device
The temperature controlled processes of system processed are based on temperature control instrument development temperature curve using temperature control instrument as core control part
High-precision control algorithm, has dual sensor and two temperature measures circuit, and sensor is measured for temperature all the way, another way sensing
Device is used for temperature alarming；By temperature transducer by liquid bath real-time temperature values cut-in temperature control instrument, pass through temperature controller
The temperature curve high-precision control algorithm of table calculates the output valve of solid-state relay and exports to solid-state relay, using solid-state after
Electric appliance duty ratio realizes heating process control to control the power of heating element；It is controlled using control solid-state relay duty ratio
The make-and-break time of cooling element realizes cooling procedure control；Wherein, the duty ratio control of solid-state relay uses temperature controller
Table is realized；
Realize that the power transmission of liquid bath temperature control device is automatically controlled with power-off, by silicon-controlled by solid-state relay-sensor loop
The cooling element duty ratio reality that the heating element duty ratio of element control is realized heating start-up and shut-down control, controlled by thyristor
Now cool down start-up and shut-down control；Temperature alarming process is using alarming instrument as core controller, when the sensor for temperature alarming is passed back
Temperature then cut off heating electric loop when being higher than preset value, and operator is notified in a manner of sound-light alarm.
2. a kind of intelligent control system of liquid bath temperature control device according to claim 1, which is characterized in that the liquid bath
The intelligent control system of temperature control device is also equipped with the level gauging defencive function realized by liquid level sensor, and liquid level sensor will
The real-time cut-in temperature control instrument of the liquid level of liquid bath then cuts off heating electric loop and cold after liquid level is lower than default liquid level lower limit
But electric loop, and operator is notified in a manner of sound-light alarm.
3. a kind of intelligent control system of liquid bath temperature control device according to claim 1 or 2, which is characterized in that described
The intelligent control system of liquid bath temperature control device is also equipped with control computer, and it is soft that control computer runs integrated multi-functional control
Part, control computer and temperature control instrument realize communication using Modbus communication protocol by serial communication, interface.
4. a kind of intelligent control system of liquid bath temperature control device according to claim 3, which is characterized in that the temperature
Control instrument and alarming instrument are provided with serial communication interface, and using the communications protocol of standard and provide SDK file, integrated
Multi-functional control software has the communication driving interface and agreement of temperature control instrument and alarming instrument, can be real by SDK file
The access and control of the variable of variable and intelligent control instrument on existing software.
5. a kind of intelligent control system of liquid bath temperature control device according to claim 3, which is characterized in that described integrated
Change multi-functional control software in included at least real time sensor data show and curve show and state indicator module, equipment ginseng
Number setup module, technological parameter setup module, the inquiry of historical data and export module.
6. a kind of intelligent control system of liquid bath temperature control device according to claim 5, which is characterized in that described real-time
Sensing data is shown and curve shows that the real time data for including: temperature control instrument and alarming instrument with state indicator module is aobvious
Show unit, the alarm temperature value of alarming instrument is shown and alarm lamp indicating unit；Total number of segment of temperature control instrument works as leading portion
Number, when leading portion control the time, when leading portion control temperature, when leading portion real time temperature, when leading portion keep the temperature timing display unit；Temperature control
Instrument mode indicating unit processed；
The device parameter setup module includes: the basic function setting unit of equipment restriction, is applied to intelligent curve controlled
Restriction parameter set unit；
The basic function setting unit that equipment limits includes curve number setting unit, curve execution number setting unit, starting
Mode setting unit, chronomere's setting unit, temperature upper limit and lower limit setting unit；
Restriction parameter set unit applied to intelligent curve controlled includes: temperature target customization control and program calculating mesh
Controlling value mode selecting unit is marked, solid-state relay aperture customization control calculates opening value control unit, temperature objectives with program
Value customization controlling value setting unit, solid-state relay aperture customize controlling value setting unit；
The technological parameter setup module include: temperature number of segment setup unit, initial temperature setup unit, every step target temperature
The parameter setting unit of setup unit, every step process time；
The inquiry of historical data and the time graph setting unit that export module includes: inquiry, are looked into time interval setting unit
It askes data and shows chart unit, inquiry chart clearing cell, chart data lead-out unit.
7. a kind of intelligent control system of liquid bath temperature control device according to claim 6, which is characterized in that the equipment
Parameter setting module further includes that control algolithm parameter limits setting unit, and it includes proportional band that control algolithm parameter, which limits setting unit,
Parameter setting unit, time of integration parameter setting unit, derivative time parameter setting unit, the setting of integral initial value is single manually
Member, action sensitivity setup unit, output valve upper limit value setting unit, output valve lower limit value setup unit.
8. a kind of intelligent control system of liquid bath temperature control device according to claim 1, which is characterized in that described to be embedded in
The temperature control algorithm of temperature control instrument includes: the control method for realizing target temperature direct control function, realizes that control is calculated
Method calculate temperature controlled processes function control method, realize setting solid-state relay duty ratio control function control method,
Realize that control algolithm calculates the control method of solid-state relay duty ratio control function.
9. a kind of intelligent control system of liquid bath temperature control device according to claim 8, which is characterized in that the realization
The control method of target temperature direct control function calculates solid in real time using fixed temperature as controlled object temperature, by control algolithm
The duty ratio of state relay realizes temperature scaling factor；
The control method realized control algolithm and calculate temperature controlled processes function are as follows: according to the termination target being heated or cooled
Temperature and process time calculate controlled object temperature in real time, calculate the duty ratio of solid-state relay in real time by control algolithm, real
Existing temperature scaling factor；
Wherein, it is specifically used when calculating controlled object temperature in real time with process time according to the termination target temperature being heated or cooled
Algorithm are as follows:
Wherein, Ts0For heating or cooling procedure initial temperature value, unit: DEG C；TsaFor the target temperature that process is heated or cooled
Angle value, unit: DEG C；tproFor the control time that process is heated or cooled, unit: Min；After t is self-heating or cooling procedure starting
Elapsed-time standards, unit: Min；Ts(t) for the real-time target temperature that process corresponds to the time is heated or cooled, unit: DEG C；
The control method for realizing setting solid-state relay duty ratio control function are as follows: after process starting is heated or cooled, root
It is constant according to the duty ratio and temperature control process of experience setting solid-state relay, it realizes the control of solid-state relay duty ratio, reaches target
Heating or cooling procedure are automatically stopped after temperature；
It is described to realize that control algolithm calculates the control method of solid-state relay duty ratio control function to be controlled with target temperature
Temperature, controller calculate the duty ratio of solid-state relay in real time, realize temperature scaling factor；
In above-mentioned four kinds of methods, the control algolithm for calculating the duty ratio of solid-state relay in real time is a kind of ratio of band integral initial value
Example integral-differential, algorithm, specific formula for calculation are as follows:
Wherein:
U (t) is controller output quantity, unit are as follows: V；
u0To integrate initial value, unit are as follows: V；
E (t) is the error amount of real-time set temperature and real time temperature, unit are as follows: V；
KpFor proportionality coefficient, dimensionless；
TdFor derivative time, unit are as follows: s；
TiFor the time of integration, unit are as follows: s；
The ratio between controller output quantity and solid-state relay gamut determine the duty ratio of controlled element, and integral initial value is for feedovering
Inhibit the big lag characteristic of temperature controlled processes, proportionality coefficient is used to control the rapidity of temperature control algorithm, and derivative time is for pressing down
Make the concussion performance of controlled parameter, the time of integration for realizing control algolithm stability.
10. a kind of intelligent control system of liquid bath temperature control device according to claim 1, which is characterized in that the liquid
Temperature control device is bathed including at least circulating element in heating element, cooling device, liquid bath, the heating element can meet liquid bath device
Most fast heating rate demand for control, cooling device can meet the most fast cooling rate demand for control of liquid bath device, follow in liquid bath
Loop member is matched with the heating speed of heating element, the cooling velocity of cooling device, and heating element and cooling device were run
Circulating element is run always in liquid bath in journey.
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