CN104238592A - Rapid thermostat self-adaption control method and system - Google Patents
Rapid thermostat self-adaption control method and system Download PDFInfo
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Abstract
The invention provides a rapid thermostat self-adaption control method and system. The temperature control parameter can be set by controlling the temperature inside a thermostat through an automatic temperature control method, the optimal temperature control parameter can be selected through an algorithm, a core control module conducts temperature control deciding and parameter setting according to the target control temperature, the actual external temperature and the actual internal temperature which are set through a keyboard, the actual temperature which is detected through a temperature detection module inside the thermostat is unceasingly fed back and controlled, it is ensured that the steady state error of the temperature inside the thermostat meets the requirement, the control accuracy and the control stability of the temperature inside the thermostat can be easily improved, and the self-adaption control algorithm can be easily and subsequently improved without changing the hardware structure of the thermostat system.
Description
Technical field
The present invention relates to constant temperature oven control technology field, be specifically related to a kind of fast constant temperature case self-adaptation control method and control system.
Background technology
So-called " self-adaptation " generally refers to that system adjusts himself according to the change of environment, make its behavior new or altered environment be issued to preferably or be at least the characteristic and function of allowing, this adaptive control system is called to the control system that environmental change has an adaptive faculty.Adaptive control system is a kind of control system adopting control object Characteristics Control controlled parameter convergence target component.Self-adaptive temperature control system utilizes actual temperature and measuring tempeature and self-adaptation control method control temperature convergence target temperature gradually, realizes the target temperature of controlled device to control within the scope of certain errors.Along with the development of test and measuring technology, the application of constant temperature oven in test and measuring is more and more wider, require more and more higher to the temperature accuracy of constant temperature oven, in prior art, the full mimic channel of the many employings of temperature-controlled process controls, although also reach certain level in temperature stability control, but control accuracy and in real time control aspect can't satisfy the demands, and can not function setting be carried out, therefore be necessary to design a kind of temperature control speed fast, precision high and the temperature control system of good stability and control system, to realize controlling the high precision of constant temperature oven internal temperature, meet higher application demand.
Summary of the invention
The defect existed for prior art and deficiency, the invention provides a kind of fast constant temperature case self-adaptation control method and control system, the control method based on this control system can realize the quick high accuracy adaptive control to constant temperature oven internal temperature.
The technical solution used in the present invention is:
A kind of fast constant temperature case adaptive control system, it is characterized in that, comprise kernel control module, internal temperature detection module, external temperature detection module, input through keyboard module, signal amplification module, temperature control modules, heating and cooling module, LCD MODULE, communication module, described kernel control module connects internal temperature detection module respectively, external temperature detection module, input through keyboard module, signal amplification module, LCD MODULE and communication module, described signal amplification module connects temperature control modules, described temperature control modules connects heating and cooling module,
Described internal temperature detection module and external temperature detection module are respectively used to detect constant temperature oven internal temperature and external temperature, and respectively digital temperature data are transferred to kernel control module;
Described kernel control module continuous acquisition constant temperature oven is inner, external temperature according to the target control temperature of the actual ambient temperature gathered, actual inside temperature and setting, carry out adaptive control, export control signal to described signal amplification module;
The voltage signal that described signal amplification module is used for kernel control module exports carries out the amplification of given multiple and outputs to temperature control modules; The voltage transitions that described temperature control modules is used for signal amplification module to export is that corresponding power signal outputs to heating and cooling module; The power signal that described heating and cooling module is used for exporting according to temperature control modules heats or refrigerating operation constant temperature oven, constant temperature oven internal temperature control in the target control temperature range of setting;
Described input through keyboard module is used for arranging correlation function and input data; Described LCD MODULE is used for display setting temperature, observed temperature and system information; Described communication module is used for being connected with host computer, communicates with host computer.
Described internal temperature detection module comprises transducer calibration unit, for correcting internal temperature sensor precision, described transducer calibration unit is according to two measured temperature values and two actual environment temperature values, the actual temperature zero point of accounting temperature sensor and actual temperature sensitivity, and be demarcated as follow-uply carrying out temperature controlled temperature zero point and sensitivity.
Described kernel control module comprises adaptive temperature controller, constant temperature oven internal temperature is controlled by adaptive control mode, according to the constant temperature oven inside and outside actual temperature difference of detection and the difference of the target control temperature set and the inner actual temperature of constant temperature oven, temperature control parameter is set and selected temperature control flow and Optimal Temperature Control parameter, calculated by temperature control algorithm and export the control signal in corresponding moment.
A kind of fast constant temperature case self-adaptation control method, is characterized in that according to external temperature and constant temperature oven close beta temperature, can automatically completing the Self-tuning System of temperature control parameter, and the temperature completing constant temperature oven fast controls, and comprises the steps:
Step one, fast constant temperature case adaptive control system power-up initializing, comprises transducer calibration, target setting control temperature and pid control parameter setting;
Step 2, start-up temperature sensor carries out temperature detection, measures the inner actual temperature of constant temperature oven and outside actual temperature and is preserved;
Step 3, automatically choose suitable controling parameters according to constant temperature oven inside and outside temperature and adaptive control is carried out to constant temperature oven inside actual temperature, according to the difference of target control temperature and the constant temperature oven inside actual temperature of constant temperature oven inside and outside actual temperature difference and setting, according to the temperature control parameter preset, calculate output controlled quentity controlled variable, and be translated into the power signal that can control constant temperature oven internal temperature, constant temperature oven is heated or refrigerating operation, constant temperature oven internal temperature is controlled fast in the target control temperature range of setting;
Step 4, the inner actual temperature of continuous acquisition constant temperature oven and outside actual temperature, carry out FEEDBACK CONTROL, and then realization is to the real-time control of constant temperature oven internal temperature and adjustment.
In described step one, comprise calibration of sensor method, namely first in the environment of a temperature relative constancy, constant temperature oven internal temperature is detected, when after detected temperatures value stabilization a period of time, input environment temperature value and detected temperatures value being preserved, constant temperature oven internal temperature is detected again in the environment of another temperature relative constancy, when after detected temperatures value stabilization a period of time, input environment temperature value and detected temperatures value being preserved, then by actual temperature zero point of two actual environment temperature and two measured temperature accounting temperature sensors and actual temperature sensitivity and to be saved in the controller of kernel control module inner, follow-up carrying out directly uses this calibrated temperature zero point and sensitivity when temperature controls.
In described step one, described temperature control parameter setting comprises, respectively input constant temperature oven internal temperature and external temperature difference positive and negative 5 degree with positive and negative 2 degree time temperature controlled optimum value, and the controller these optimal values being deposited kernel control module is inner, after system cloud gray model, meeting first be read one group of optimization control parameter according to constant temperature oven inside and outside temperature and choose suitable temperature control parameter according to constant temperature oven actual inside and outside temperature difference in follow-up temperature control strategy and be controlled for actual temperature.
In described step 3, by starting the timer A being used for temperature detection and temperature controlled frequency, timer A control temperature is utilized to detect and display in real time.
In described step 3, also comprise the timer B starting and control output for temperature, described timer B calls timer A handling procedure and calculates observed temperature, exports corresponding temperature control signals, realize the real-time control to constant temperature oven internal temperature and adjustment after judging working control mode.
Described working control mode comprises opened loop control, closed-loop control and modified double-closed-loop control.
Compared with prior art, Advantageous Effects of the present invention is:
1. the invention provides a kind of fast constant temperature case self-adaptation control method, constant temperature oven internal temperature is controlled by modified temperature control mode, can set in real time temperature control parameter, also Optimal Temperature Control parameter is selected by algorithm, kernel control module is according to the target control temperature by keyboard to set up, actual ambient temperature and the actual inside temperature of actual measurement carry out temperature control decision and parameter tuning, the actual temperature constantly detected by constant temperature oven internal temperature detection module carries out FEEDBACK CONTROL, guarantee that constant temperature oven internal temperature steady-state error meets the demands, both be conducive to improving constant temperature oven internal temperature control precision and temperature controlled stability, and be conducive to follow-up adaptive control algorithm is improved and do not need to change the hardware configuration of constant temperature oven system.
2. the invention provides a kind of fast constant temperature case adaptive control system, this constant temperature oven adaptive control system uses digital temperature sensor to detect constant temperature oven inside and outside temperature, adaptive control decision-making is carried out according to detected temperatures parameter and target control temperature, select suitable controling parameters and control flow, fast and efficiently constant temperature oven internal temperature control within the scope of specification error.This control system can carry out digital measurement and control, can be carried out sophisticated functions setting by man-machine interactive system and be controlled, meet the application demand that user is higher to constant temperature oven.
Accompanying drawing explanation
Fig. 1 is fast constant temperature case adaptive control system structural representation.
Fig. 2 is fast constant temperature case self-adaptation control method schematic diagram.
Fig. 3 is fast constant temperature case self-adaptation control method step block diagram of the present invention.
Fig. 4 is adaptive control program flow diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 is fast constant temperature case adaptive control system structural representation.As shown in Figure 1, the invention provides a kind of fast constant temperature case adaptive control system, this fast constant temperature case adaptive control system uses digital temperature sensor to detect constant temperature oven inside and outside temperature, adaptive control decision-making is carried out according to detected temperatures parameter and target control temperature, select suitable controling parameters and control flow, fast and efficiently constant temperature oven internal temperature control within the scope of specification error.This control system can carry out digital measurement and control, can be carried out sophisticated functions setting by man-machine interactive system and be controlled, meet the application demand that user is higher to constant temperature oven.
Fast constant temperature case adaptive control system provided by the invention comprises kernel control module, internal temperature detection module, external temperature detection module, input through keyboard module, signal amplification module, temperature control modules, heating and cooling module, LCD MODULE, communication module, kernel control module connects internal temperature detection module, external temperature detection module, input through keyboard module, signal amplification module, LCD MODULE and communication module respectively, signal amplification module connects temperature control modules, and temperature control modules connects heating and cooling module; Internal temperature detection module and external temperature detection module are respectively used to detect constant temperature oven internal temperature and external temperature, and respectively digital temperature data are transferred to kernel control module; Kernel control module circle collection constant temperature oven is inner, external temperature according to the target control temperature of the actual ambient temperature gathered, actual inside temperature and setting, carry out adaptive control, export control signal to described signal amplification module; The voltage signal that signal amplification module is used for kernel control module exports carries out the amplification of specific factor and outputs to temperature control modules; The voltage transitions that described temperature control modules is used for signal amplification module to export is that corresponding power signal outputs to heating and cooling module; The power signal that heating and cooling module is used for exporting according to temperature control modules heats or refrigerating operation constant temperature oven, constant temperature oven internal temperature control in the target control temperature range of setting.Input through keyboard module is used for arranging correlation function and input data; Described LCD MODULE is used for display setting temperature, observed temperature and system information; Described communication module is used for being connected with host computer, communicates with host computer.
Wherein, 220V alternating current is delivered to the power transfer module of control system by AC power load module, and 220V alternating current is converted to direct supply respectively to each module for power supply in control system by power transfer module; Kernel control module connects internal temperature detection module, external temperature detection module and communication module respectively; Kernel control module circle collection constant temperature oven is inner, external temperature also shows the response waiting for input through keyboard module; Kernel control module carries out control temperature setting, temperature control parameter setting or transducer calibration operation after the response obtaining input through keyboard module, then carries out temperature control; Internal temperature detection module comprises temperature sensor, for detecting constant temperature oven internal temperature, and digital temperature data is transferred to kernel control module; External temperature detection module for detecting constant temperature oven external temperature, i.e. environment temperature, and digital temperature data are transferred to kernel control module; Input through keyboard module is connected with kernel control module, for arranging correlation function and input data; LCD MODULE is connected with kernel control module, for display setting temperature, observed temperature and system information; Signal amplification module is connected with temperature control modules with kernel control module, carries out the amplification of specific factor for the magnitude of voltage exported by kernel control module and outputs to temperature control modules; Temperature control modules is connected with heating and cooling module with signal amplification module, and the voltage transitions for being exported by signal amplification module is that corresponding power signal outputs to heating and cooling module; Heating and cooling module is connected with temperature control modules, and the voltage exported for utilizing temperature control modules carries out heating or refrigerating operation; Host computer is connected with communication module, is integrated in constant temperature oven inside, for the treatment of the communication information in control system.Fast constant temperature case adaptive control system provided by the invention also can be called for short constant temperature oven adaptive system or constant temperature oven system in the present invention.
Fig. 2 is fast constant temperature case self-adaptation control method schematic diagram.Wherein, r (t) is the target temperature by keyboard to set up, the difference that e (t) is observed temperature and target temperature, u (t) is temperature controller output controlled quentity controlled variable, y (t) is constant temperature oven inside actual temperature, detect the inner actual temperature y (t) of constant temperature oven by internal temperature detection module and subtract each other with target temperature r (t) by keyboard to set up the difference e (t) obtaining observed temperature and target temperature, and then calculate output controlled quentity controlled variable u (t) by temperature controller, constant temperature oven system is undertaken corresponding by actual output controlled quentity controlled variable and the impact of the signal that is disturbed is comprehensively constant temperature oven internal temperature real-time change, recycling internal temperature detection module detects internal temperature feedback and is fed back into, cycle control constant temperature oven internal temperature like this.
Fig. 3 is fast constant temperature case self-adaptation control method step block diagram of the present invention.The present invention is on the design concept basis shown in Fig. 2, form the committed step realizing fast constant temperature case self-adaptation control method as shown in Figure 3: step one, fast constant temperature case adaptive control system power-up initializing, comprises transducer calibration, target setting control temperature and temperature control mode and temperature control parameter setting; Step 2, start-up temperature sensor carries out temperature detection, measures constant temperature oven internal temperature and external temperature and is preserved; Step 3, modified temperature-controlled process is adopted to carry out adaptive control to constant temperature oven inside actual temperature, according to the difference of target control temperature and the constant temperature oven inside actual temperature of constant temperature oven inside and outside actual temperature difference and setting, according to the temperature control parameter preset, calculate output controlled quentity controlled variable, and be translated into the power signal that can control constant temperature oven internal temperature, constant temperature oven is heated or refrigerating operation, fast constant temperature oven internal temperature control setting target control temperature range in; Step 4, the inner actual temperature of continuous acquisition constant temperature oven and outside actual temperature, carry out FEEDBACK CONTROL, and then realization is to the real-time control of constant temperature oven internal temperature and adjustment.Temperature controller calculates output controlled quentity controlled variable according to the temperature control parameter preset, and temperature control modules is translated into the power signal that can control constant temperature oven internal temperature; Kernel control module circle collection constant temperature oven is inner, external temperature, and the observed temperature constantly detected by constant temperature oven internal temperature detection module carries out FEEDBACK CONTROL, and then realization is to the real-time control of constant temperature oven internal temperature and adjustment.In step one, comprise calibration of sensor method, namely first in the environment of a temperature relative constancy, constant temperature oven internal temperature is detected, when after detected temperatures value stabilization a period of time, input environment temperature value and detected temperatures value being preserved, constant temperature oven internal temperature is detected again in the environment of another temperature relative constancy, when after detected temperatures value stabilization a period of time, input environment temperature value and detected temperatures value being preserved, then by actual temperature zero point of two actual environment temperature and two measured temperature accounting temperature sensors and actual temperature sensitivity and to be saved in the controller of kernel control module inner, follow-up carrying out directly uses this calibrated temperature zero point and sensitivity when temperature controls.The direct supply that the power supply that fast constant temperature case adaptive control system connects when powering on provides for described power transfer module, 220V alternating current is converted to direct supply respectively to other each module for power supply in control system by power transfer module; In step 2, the temperature sensor in internal temperature detection module detects constant temperature oven internal temperature, and digital temperature data are transferred to kernel control module; Described external temperature refers to the environment temperature that external temperature detection module detects; In step 3, described observed temperature, by starting the timer A in kernel control module, utilizes the detection of timer A control temperature, temperature controlled frequency and shows in real time.Temperature controller (modified dicyclo pid control algorithm) mentioned in the present invention is backfeed loop parts.This controller compares the data collected and a reference value, then this difference for calculating new input value, the object of this new input value to allow the data of system reach or remain on reference value.Different with other simple control algorithms, temperature controller can adjust input value according to the occurrence rate of historical data and difference, and system can be made so more accurate, more stable.
Fig. 4 is adaptive control program flow diagram.As shown in Figure 4, after fast constant temperature case control system powers on, controller starts to carry out initial setting, the condition of work of each port of setting controller and integration module and working method; Carry out sensor settings, control temperature setting and temperature control parameter setting; D/A module sets and starts DA conversion and exports; Setting LCD LCD MODULE also starts display; Start-up temperature sensor carries out temperature detection; Start the timer A being used for temperature detection and temperature controlled frequency, keyboard interrupt is set and starts global interrupt; Timer A control temperature is utilized to detect and display in real time, to wait for that keyboard to set up operation is carried out in man-machine interaction, when keyboard to set up completes backed off after random circular wait; Reset sensor, control temperature and temperature control parameter information according to keyboard to set up situation and start the timer B controlling output for temperature; Utilize timer A control temperature to detect and call timer A handling procedure and calculate observed temperature and keep in built-in variable, then LCD LCD MODULE is utilized to show observed temperature in real time, then temperature control operation is started, judge that control mode is opened loop control, closed-loop control, the closed-loop control of modified dicyclo, carry out correspondence according to working control mode to control, realize the real-time control to constant temperature oven internal temperature and adjustment.Pulse-length modulation (PWM) in Fig. 4, be the abbreviation of English " Pulse Width Modulation ", being called for short width modulation, is utilize the numeral of microprocessor to export the very effective technology of one controlled mimic channel.
It should be pointed out that the above specific embodiment of the invention can make the present invention of those skilled in the art's comprehend, but do not limit the present invention in any way.Therefore, although this instructions and embodiment are to present invention has been detailed description, it will be appreciated by those skilled in the art that and still can modify to the present invention or equivalent replacement; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the invention, it is all encompassed in the middle of the protection domain of the invention patent.
Claims (9)
1. a fast constant temperature case adaptive control system, it is characterized in that, comprise kernel control module, internal temperature detection module, external temperature detection module, input through keyboard module, signal amplification module, temperature control modules, heating and cooling module, LCD MODULE, communication module, described kernel control module connects internal temperature detection module respectively, external temperature detection module, input through keyboard module, signal amplification module, LCD MODULE and communication module, described signal amplification module connects temperature control modules, described temperature control modules connects heating and cooling module,
Described internal temperature detection module and external temperature detection module are respectively used to detect constant temperature oven internal temperature and external temperature, and respectively digital temperature data are transferred to kernel control module;
Described kernel control module circle collection constant temperature oven is inner, external temperature according to the target control temperature of the actual ambient temperature gathered, actual inside temperature and setting, carry out adaptive control, export control signal to described signal amplification module;
The voltage signal that described signal amplification module is used for kernel control module exports carries out the amplification of specific factor and outputs to temperature control modules; The voltage transitions that described temperature control modules is used for signal amplification module to export is that corresponding power signal outputs to heating and cooling module; The power signal that described heating and cooling module is used for exporting according to temperature control modules heats or refrigerating operation constant temperature oven, constant temperature oven internal temperature control in the target control temperature range of setting;
Described input through keyboard module is used for arranging correlation function and input data; Described LCD MODULE is used for display setting temperature, observed temperature and system information; Described communication module is used for being connected with host computer, communicates with host computer.
2. a kind of fast constant temperature case adaptive control system according to claim 1, it is characterized in that, described internal temperature detection module comprises transducer calibration unit, for correcting internal temperature sensor precision, described transducer calibration unit is according to two measured temperature values and two actual environment temperature values, the actual temperature zero point of accounting temperature sensor and actual temperature sensitivity, and be demarcated as follow-uply carrying out temperature controlled temperature zero point and sensitivity.
3. a kind of fast constant temperature case adaptive control system according to claim 1, it is characterized in that, described kernel control module comprises adaptive temperature controller, constant temperature oven internal temperature is controlled by adaptive control mode, according to the constant temperature oven inside and outside actual temperature difference of detection and the difference of the target control temperature set and the inner actual temperature of constant temperature oven, temperature control parameter is set and selected temperature control flow and Optimal Temperature Control parameter, calculated by temperature control algorithm and export the control signal in corresponding moment.
4. a fast constant temperature case self-adaptation control method, is characterized in that, comprises the steps:
Step one, fast constant temperature case adaptive control system power-up initializing, comprises transducer calibration, target setting control temperature and pid control parameter setting;
Step 2, start-up temperature sensor carries out temperature detection, measures the inner actual temperature of constant temperature oven and outside actual temperature and is preserved;
Step 3, temperature control algorithm is adopted to carry out adaptive control to constant temperature oven inside actual temperature, according to the difference of target control temperature and the constant temperature oven inside actual temperature of constant temperature oven inside and outside actual temperature difference and setting, according to the temperature control parameter preset, calculate output controlled quentity controlled variable, and be translated into the power signal that can control constant temperature oven internal temperature, constant temperature oven is heated or refrigerating operation, constant temperature oven internal temperature control in the target control temperature range of setting;
Step 4, the inner actual temperature of continuous acquisition constant temperature oven and outside actual temperature, carry out FEEDBACK CONTROL, and then realization is to the real-time control of constant temperature oven internal temperature and adjustment.
5. a kind of fast constant temperature case self-adaptation control method according to claim 4, it is characterized in that, in described step one, comprise calibration of sensor method, namely first in the environment of a temperature relative constancy, constant temperature oven internal temperature is detected, when after detected temperatures value stabilization a period of time, input environment temperature value and detected temperatures value being preserved, constant temperature oven internal temperature is detected again in the environment of another temperature relative constancy, when after detected temperatures value stabilization a period of time, input environment temperature value and detected temperatures value being preserved, then by actual temperature zero point of two actual environment temperature and two measured temperature accounting temperature sensors and actual temperature sensitivity and to be saved in the controller of kernel control module inner, follow-up carrying out directly uses this calibrated temperature zero point and sensitivity when temperature controls.
6. a kind of fast constant temperature case self-adaptation control method according to claim 4, it is characterized in that, in described step one, described temperature control parameter setting comprises, input respectively constant temperature oven internal temperature and external temperature difference positive and negative 5 degree with the optimum value of temperature control parameter when positive and negative 2 degree, and the controller these optimal values being deposited kernel control module is inner, first reads optimum temperature controling parameters during system cloud gray model and choose suitable temperature according to actual inside and outside temperature difference and control numerical value and control for actual temperature.
7. a kind of fast constant temperature case self-adaptation control method according to claim 4, is characterized in that, in described step 3, by starting the timer A being used for temperature detection and temperature controlled frequency, utilizes timer A control temperature to detect and display in real time.
8. a kind of fast constant temperature case self-adaptation control method according to claim 4, it is characterized in that, in described step 3, also comprise the timer B starting and control output for temperature, described timer B calls timer A handling procedure and calculates observed temperature, export corresponding temperature after judging working control mode and control control signal, realize the real-time control to constant temperature oven internal temperature and adjustment.
9. a kind of fast constant temperature case self-adaptation control method according to claim 4, is characterized in that, described working control mode comprises opened loop control, closed-loop control, the closed-loop control of modified dicyclo.
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| CN112815612B (en) * | 2020-12-31 | 2022-06-14 | 长虹美菱股份有限公司 | Control method based on household refrigerator electric part temperature control test system |
| CN112542139A (en) * | 2021-01-03 | 2021-03-23 | 厦门特仪科技有限公司 | OLED temperature control method and OLED gamma value adjusting method and system |
| CN113359894A (en) * | 2021-06-21 | 2021-09-07 | 江苏拓米洛环境试验设备有限公司 | Humidifying method of environmental test chamber |
| CN114911287A (en) * | 2022-05-10 | 2022-08-16 | 西京学院 | Rapid constant-temperature miniature control box and temperature control method thereof |
| CN116203342A (en) * | 2023-04-27 | 2023-06-02 | 成都中航华测科技有限公司 | Temperature control method for device testing process based on high-low temperature experiment box |
| CN116203342B (en) * | 2023-04-27 | 2023-07-07 | 成都中航华测科技有限公司 | Temperature control method for device testing process based on high-low temperature experiment box |
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