CN104679061A - Temperature control system based on Dahlin algorithm - Google Patents
Temperature control system based on Dahlin algorithm Download PDFInfo
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- CN104679061A CN104679061A CN201310625793.1A CN201310625793A CN104679061A CN 104679061 A CN104679061 A CN 104679061A CN 201310625793 A CN201310625793 A CN 201310625793A CN 104679061 A CN104679061 A CN 104679061A
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Abstract
The invention relates to a temperature control system based on a Dahlin algorithm. The temperature control system comprises a measuring part, a display part, a controller and an executer, wherein the resistance value of the temperature measuring part is changed because of the temperature change, an electric signal is sent to a single chip microcomputer after bridge and amplifying processing, and the analog quantity is converted into the digital quantity to realize control; the target temperature is set by four press keys, and the real-time temperature is compared with the setting temperature; the PWM (pulse width modulation) waveform is adjusted by difference, so the power of a heating device is changed, and the temperature is fed back and controlled.
Description
Technical field
What the present invention relates to is a kind of temperature control system, particularly be a kind of temperature control system based on dahlin algorithm.
Background technology
Temperature is one of modal physical quantity in daily life.As representing measuring of the cold and hot degree of object, the every aspect that temperature and people live is all closely bound up.Drill wood to make fire as oneself heating from ape man, the temperature in today various Industrial Engineering controls, to the control and regulation of this variable of temperature all embody very extensive.Along with the development of science and technology, the requirement of people to the control accuracy of this variable of temperature also improves day by day, and the correlation technique of control temperature is also thereupon fast-developing.Special since the industrial revolution, more and more accurate temperature controls the important requirement become in industrial process.No matter the temperature survey of gas liquid, or the temperature conditions that physical-chemical reaction occurs, the control of temperature becomes enhances productivity, and improves the necessary requirement of production run.Various temperature control algorithm also finds broad application in temperature control system.The every field that current intelligentized temperature control system manufactures in social production life, industry is widely used, apply to all trades and professions such as household electrical appliance, auto industry, material, power electronics, become one of visual plant of promoting national economic development.In the modernization of industry is built, demand for energy is very large, but the present energy utilization rate of China is still extremely low, so the realization of intelligent temperature control, has epochmaking practical significance to the development of China's industrialization, robotization.
In China, although temperature control system is very general in the application of productive life each side, from the development of temperature controller, aggregate level is still limited, has compared obvious gap with traditional industrial powers Japan, the U.S., Germany etc.On the whole, current China in this respect technical merit is in middle and later periods the 1950's level, and more ripe product is " some position " control and conventional PID controller etc. mainly.It can only carry out temperature system generally and control, be difficult to adapt to delayed large, time the Complex Temperature system that becomes.And be directed to high requirement and control the intellectuality of occasion, adaptive control instrument and meter, domestic correlation technique is not also very ripe, and in the Self-tuning System field of commercialization and instrument associated control parameters, has had more more ripe product to come out abroad.But due to maintaining secrecy of external correlation technique and relatively lagging behind of China's technology development work, China does not have the product of dependable performance to come out all the time in Self-tuning System field.Its controling parameters is many to be determined by experience accumulation and method of trial and error.
Abroad, the development of temperature control system is very rapid, and obtains larger breakthrough in fields such as self-adaptation, intellectuality, parameter self-tunings.The country that the automatic technologies such as the U.S., Germany, Japan, Sweden are more flourishing, temperature controlled instrument and metered commodities degree also higher, its product has the advantages that performance is good, stability is high, and serves all trades and professions widely.At present, external temperature control system and temperature control instrument are just fast-developing towards aspects such as miniaturization, intellectuality, precisions.
Dahlin algorithm (Dahlin algorithm) is for the control object had compared with large time delay characteristic, if require that system non-overshoot amount or overshoot are very little, and allow longer regulating time, so PID controller realizes this control by being difficult to.The great Lin (Dahlin) of IBM Corporation nineteen sixty-eight propose a kind of for industrial processes in control algolithm containing true hysteresis link.Its target is exactly make the transport function of whole closed-loop system be equivalent to a first order inertial loop with purely retarded.This algorithm has good control effects.
Summary of the invention
The object of this invention is to provide one and can carry out accurate temperature survey, control and display, realize little the overshoot even temperature control system of non-overshoot.
The object of the present invention is achieved like this:
Based on a temperature control system for dahlin algorithm, its composition comprises measure portion, display section, controller and actuator.Wherein temperature measuring section changes due to the change resistance of temperature, by electric bridge and after amplifying process, electric signal is passed to single-chip microcomputer, realizes controlling after analog quantity is converted into digital quantity.
Described a kind of temperature control system based on dahlin algorithm, is characterized in that measure portion bridge circuit carries out temperature acquisition in conjunction with PT100, the display section real time temperature of 1602 display water temperatures and design temperature.
Described a kind of temperature control system based on dahlin algorithm, it is characterized in that measured part rated voltage is alternating current 220V, power is 500 ~ 1000W, during work, maximum current is 4.55A, effective heating part is heater coil pipe, pipe is built with heating wire and pour into the insulating material of magnesia powder and so on, and during heating, coiled tubes submergence in a liquid, and heat trnasfer makes liquid be heated.
The analog quantity of native system first collecting temperature signal, through temperature transition mechanism, the analog quantity of temperature signal is converted to the voltage analog quantity of temperature signal, be converted to the digital quantity of temperature signal again through A/D, process in single-chip microcomputer, be converted into the actual temperature that liquid crystal wants reality.Setting when simultaneously temperature being carried out by button, by gather the temperature of temperature and design compare, if actual temperature is lower than design temperature, then startup heating rod heats water, if actual temperature is higher than design temperature, does not then heat.
Temperature control system is primarily of measure portion, display section, controller and actuator composition.Temperature measuring section changes due to the change resistance of temperature, by electric bridge and after amplifying process, electric signal is passed to single-chip microcomputer, realizes controlling after analog quantity is converted into digital quantity.Also realize the setting to target temperature with four buttons simultaneously, real time temperature and design temperature are compared.Regulate PWM waveform by difference, thus change the power of heating arrangement, realize feedback and the control of temperature.
Measure portion bridge circuit to carry out temperature acquisition in conjunction with PT100.Display section shows real time temperature and the design temperature of water temperatures with 1602.1602 liquid crystal are also 1602 character mode lcds, and it is a kind of dot matrix type Liquid Crystal Module being used for showing letter, numeral, symbol etc. specially.It is made up of dot character positions such as several 5X7 or 5X11, and each dot character position can show a character, has the interval of a some distance between every, often also has interval between row, serves the effect of character pitch and line space.Controller is the minimum system of STC12C5A60S2.Testing main control object is heating rod, or is called title " immersion heater ", and rated voltage is alternating current 220V, and power is 500 ~ 1000W, and during work, maximum current is 4.55A.Effective heating part is heater coil pipe, and pipe is built with heating wire and pour into the insulating material of magnesia powder and so on, and during heating, coiled tubes submergence in a liquid, and heat trnasfer makes liquid be heated.Adopt solid-state relay LIRRD DA switch control rule heating rod power, this relay input control end is this relay input control end is 3 ~ 32VDC, and output terminal is 5A380V50 ~ 60Hz.
Advantage of the present invention: be core controller with STC12C5A60S2, cost performance is high, and adopt dahlin algorithm in conjunction with pid algorithm, control mode control accuracy is as compared with the past higher, and overshoot is less simultaneously.
Accompanying drawing explanation
Fig. 1 is hardware structure diagram of the present invention;
Fig. 2 is program flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Based on a temperature control system for dahlin algorithm, its composition comprises measure portion, display section, controller and actuator.Wherein temperature measuring section changes due to the change resistance of temperature, by electric bridge and after amplifying process, electric signal is passed to single-chip microcomputer, realizes controlling after analog quantity is converted into digital quantity.
It is characterized in that measure portion bridge circuit to carry out temperature acquisition in conjunction with PT100, the display section real time temperature of 1602 display water temperatures and design temperature.
It is characterized in that measured part rated voltage is alternating current 220V, power is 500 ~ 1000W, during work, maximum current is 4.55A, effective heating part is heater coil pipe, pipe is built with heating wire and pour into the insulating material of magnesia powder and so on, during heating, coiled tubes submergence in a liquid, and heat trnasfer makes liquid be heated.
Composition graphs 1, Fig. 1 is hardware structure diagram of the present invention.The analog quantity of native system first collecting temperature signal, through temperature transition mechanism, the analog quantity of temperature signal is converted to the voltage analog quantity of temperature signal, be converted to the digital quantity of temperature signal again through A/D, process in single-chip microcomputer, be converted into the actual temperature that liquid crystal wants reality.Setting when simultaneously temperature being carried out by button, by gather the temperature of temperature and design compare, if actual temperature is lower than design temperature, then startup heating rod heats water, if actual temperature is higher than design temperature, does not then heat.
Temperature control system is primarily of measure portion, display section, controller and actuator composition.Temperature measuring section changes due to the change resistance of temperature, by electric bridge and after amplifying process, electric signal is passed to single-chip microcomputer, realizes controlling after analog quantity is converted into digital quantity.Also realize the setting to target temperature with four buttons simultaneously, real time temperature and design temperature are compared.Regulate PWM waveform by difference, thus change the power of heating arrangement, realize feedback and the control of temperature.
Measure portion bridge circuit to carry out temperature acquisition in conjunction with PT100.Display section shows real time temperature and the design temperature of water temperatures with 1602.1602 liquid crystal are also 1602 character mode lcds, and it is a kind of dot matrix type Liquid Crystal Module being used for showing letter, numeral, symbol etc. specially.It is made up of dot character positions such as several 5X7 or 5X11, and each dot character position can show a character, has the interval of a some distance between every, often also has interval between row, serves the effect of character pitch and line space.Controller is the minimum system of STC12C5A60S2.Testing main control object is heating rod, or is called title " immersion heater ", and rated voltage is alternating current 220V, and power is 500 ~ 1000W, and during work, maximum current is 4.55A.Effective heating part is heater coil pipe, and pipe is built with heating wire and pour into the insulating material of magnesia powder and so on, and during heating, coiled tubes submergence in a liquid, and heat trnasfer makes liquid be heated.Adopt solid-state relay LIRRD DA switch control rule heating rod power, this relay input control end is this relay input control end is 3 ~ 32VDC, and output terminal is 5A380V50 ~ 60Hz.
Composition graphs 2, Fig. 2 is program flow diagram of the present invention.Routine call is the subroutines such as LCD1602 display routine, keyboard scan and keystroke handling program, processes temperature signal program, Control program.Keystroke handling program: the identification of the input key of realization, read and write, and enter corresponding program.Processes temperature signal program: process the data that the bridge circuit of PT100 is brought, carries out judging and showing.Display routine: send number, the display section of control system to LCD1602 display.Power control procedures: control PWM exports, and then control heating arrangement.
Program first arranges initialization at first, and then just control LCD1602 shows Current Temperatures.Judge current whether temperature setting with that.The plus-minus of plus-minus to a temperature position and ten can being realized with four keyboards, as now set temperature, then reading in temperature value.Setting terminate after by sensor measured temperature compared with design temperature, if lower than design temperature, difference is returned to PID module, carries out incremental timestamp.And with PID control PWM ripple, realize the control to heater power.Owing to feeding back the mensuration of temperature and occurring more all the time, and constantly calculate the difference of real time temperature and design temperature, system realizes cyclic process.
Claims (3)
1., based on a temperature control system for dahlin algorithm, its composition comprises measure portion, display section, controller and actuator.Wherein temperature measuring section changes due to the change resistance of temperature, by electric bridge and after amplifying process, electric signal is passed to single-chip microcomputer, realizes controlling after analog quantity is converted into digital quantity.
2. a kind of temperature control system based on dahlin algorithm according to claim 1, is characterized in that measure portion bridge circuit carries out temperature acquisition in conjunction with PT100, the display section real time temperature of 1602 display water temperatures and design temperature.
3. a kind of temperature control system based on dahlin algorithm according to claim 1, it is characterized in that measured part rated voltage is alternating current 220V, power is 500 ~ 1000W, during work, maximum current is 4.55A, effective heating part is heater coil pipe, pipe is built with heating wire and pour into the insulating material of magnesia powder and so on, and during heating, coiled tubes submergence in a liquid, and heat trnasfer makes liquid be heated.
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| CN201310625793.1A CN104679061A (en) | 2013-11-28 | 2013-11-28 | Temperature control system based on Dahlin algorithm |
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| CN201310625793.1A CN104679061A (en) | 2013-11-28 | 2013-11-28 | Temperature control system based on Dahlin algorithm |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234599A (en) * | 2015-10-20 | 2016-01-13 | 沈阳富创精密设备有限公司 | Welding temperature field control system and method |
| CN105807632A (en) * | 2016-05-06 | 2016-07-27 | 中南大学 | Heating furnace temperature controller design method based on improved Dahlin algorithm |
| CN110109360A (en) * | 2019-05-22 | 2019-08-09 | 杭州电子科技大学 | A kind of big beautiful jade response control mehtod of industrial process broad sense |
| CN113325897A (en) * | 2021-06-10 | 2021-08-31 | 西北农林科技大学 | Automatic cooling control system and method for wine fermentation |
-
2013
- 2013-11-28 CN CN201310625793.1A patent/CN104679061A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234599A (en) * | 2015-10-20 | 2016-01-13 | 沈阳富创精密设备有限公司 | Welding temperature field control system and method |
| WO2017067241A1 (en) * | 2015-10-20 | 2017-04-27 | 沈阳富创精密设备有限公司 | Welding temperature field control system and method |
| CN105234599B (en) * | 2015-10-20 | 2018-06-12 | 沈阳富创精密设备有限公司 | Welding temperature station control system and method |
| CN105807632A (en) * | 2016-05-06 | 2016-07-27 | 中南大学 | Heating furnace temperature controller design method based on improved Dahlin algorithm |
| CN105807632B (en) * | 2016-05-06 | 2018-06-12 | 中南大学 | A kind of furnace temp controller design method based on improvement dahlin algorithm |
| CN110109360A (en) * | 2019-05-22 | 2019-08-09 | 杭州电子科技大学 | A kind of big beautiful jade response control mehtod of industrial process broad sense |
| CN113325897A (en) * | 2021-06-10 | 2021-08-31 | 西北农林科技大学 | Automatic cooling control system and method for wine fermentation |
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Application publication date: 20150603 |