CN105138040A - Intelligent water temperature control system and method - Google Patents
Intelligent water temperature control system and method Download PDFInfo
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- CN105138040A CN105138040A CN201510677393.4A CN201510677393A CN105138040A CN 105138040 A CN105138040 A CN 105138040A CN 201510677393 A CN201510677393 A CN 201510677393A CN 105138040 A CN105138040 A CN 105138040A
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Abstract
The invention discloses an intelligent water temperature control system, which comprises a temperature measurement module, an infrared remote control module, a sound production module, a display module and a single chip microcomputer, wherein the temperature measurement module is used for monitoring water temperature in real time and acquiring real-time water temperature Tg; the infrared remote control module is used for setting target water temperature Tw which needs to arrive at in a remote control mode; the sound production module is used for producing a sound for prompting when the target water temperature Tw is set successfully; the display module is used for displaying the real-time water temperature Tg and the target water temperature Tw; and the single chip microcomputer is used for acquiring a water temperature difference value e=Tw-Tg and a difference value change rate ec=de/dt according to the real-time water temperature Tg and the target water temperature Tw, comparing an absolute value |e| for the water temperature difference value and a preset threshold e0, adopting a Bang-Bang variable structure control method to carry out control heating on a heating module via a temperature control module when |e|>/=e0, and adopting an adaptive PID control-based PWM control method to carry out control heating on the heating module via the temperature control module when |e|<e0 to enable the water temperature to reach the target water temperature Tw finally. The invention also discloses an intelligent water temperature control method. Accuracy and stability are improved.
Description
Technical field
The present invention relates to field of intelligent control technology, particularly relate to a kind of Intelligent water control method and system.
Background technology
Water is human survival and the indispensable part of development, and water temperature is then one very important in numerous parameters of water.Along with the continuous progress of science and technology, commercial production and daily life have very strict requirement to water temperature.In industrial circle, carrying out smoothly of the production automation can be ensured to the accurate control of water temperature.In daily life, people can free setting water temperature, to reach the demand of oneself.As can be seen here, Intelligent water control technology has good application prospect and Practical significance.Water temperature controls to be exactly the requirement in order to make water temperature reach expection, after system obtains environmental parameter, in conjunction with various advanced technology and science algorithm, realizes the object of product quality raising and production safety.At present, accurate water temperature control system is widely used in productive life as a kind of advanced technology, as making food, pharmaceutical preparation, heavy chemicals and ordinary electrical home appliance etc.In addition, the accuracy of control determines product quality.The temperature of Single-chip Controlling water, improves control ability effectively, realizes the target of intelligence.Traditional water temperature control performance is not good, even has instability, phenomenon out of control.Why there will be this phenomenon, be because traditional water temperature controls to adopt resistance current-limiting mode, the control object inertia of this class is comparatively large, easily causes delayed.In reality, energy dissipation causes primarily of the unchangeability of entire system power.
1870s, the temperature that abroad begins one's study controls.Through the continuous exploration of decades, external temperature control system simulates combination instrument Information Monitoring by initial utilization, then carries out various calculating and derive realizing temperature control, promptly moves towards intelligent and miniaturization.At the beginning of 21 century, by Microcomputer Collecting and control information transmission " multiple-factor complex control system " set about have developed by scientists, the world is just moving towards unmanned automatic control.The scientist of China just slowly only learnt for microcomputer technology in the temperature chamber of the item environment factor from 1980.At present, domestic temperature control system can only reach the level of middle and later periods in 20th century, also has very large gap compared to developed country.In the temperature control system with hysteresis characteristic and complicated time-varying characteristics, the current technology of China is also nowhere near.Gap between China and developed country is mainly the commercialization of instrument, and domestic adaptive control technology of updating is in the hope of reducing gap.PID controller, as a kind of more ripe controller, is often used in the making of intelligentized control method instrument.But, the raising that the requirement of temperature control system requires quality of life along with people is more strict, and simple PID control technology can not meet the precision of people to water temperature and the requirement of fast-response.
And based on monolithic processor controlled water temperature system, system accuracies and stability both can have been improved, also can reduce the consumption of the energy.
Summary of the invention
Technical matters to be solved by this invention is, provides a kind of Intelligent water temperature control system, improves system accuracies and stability, reduces the consumption of the energy.
In order to solve the problems of the technologies described above, the invention provides a kind of Intelligent water temperature control system, comprise: temperature-measuring module, infrared remote control module, display module, sounding module, single-chip microcomputer, temperature control modules and heating module, wherein, described temperature-measuring module is used for Real-Time Monitoring water temperature, obtains real-time water temperature T
gand be sent to single-chip microcomputer; Described infrared remote control module is used for remote control and arranges the target water temperature T needing to reach
wand be sent to single-chip microcomputer; Described sounding module is used at described target water temperature T
wsound production prompt is successfully set; Described display module is for showing real-time water temperature T
gwith described target water temperature T
w; Described single-chip microcomputer is used for according to described real-time water temperature T
gwith described target water temperature T
wcalculate water temperature difference e=T
w-T
gwith difference rate of change ec=de/dt, and compare the absolute value of water temperature difference | e| and predetermined threshold value e
0, when | e|>=e
0time, adopt Bang-Bang variable structure control method to carry out control heating by temperature control modules to heating module, when | e|<e
0time, adopt the PWM control method based on Adaptive PID Control to carry out control heating by temperature control modules to heating module, make water temperature finally reach target water temperature T
w.
Further, described infrared remote control module comprises Infrared remote controller and model is the infrared receiving terminal of HX1838, and the infrared receiving terminal of described HX1838 connects described single-chip microcomputer, and described Infrared remote controller is used for target setting water temperature T
wand send target water temperature T
wto described infrared receiving terminal, described infrared receiving terminal is used for described target water temperature T
wbe sent to described single-chip microcomputer.
Further, described temperature control modules is specially relay, and described temperature-measuring module is specially the temperature sensor that model is DS18B20, described display module to be model be 12864 LCDs, described single-chip microcomputer model is STC89C58.Described sounding module is specially hummer.
The invention also discloses a kind of Intelligent water control method, described method is based on above-mentioned Intelligent water temperature control system, then described method comprises:
Temperature-measuring module Real-Time Monitoring water temperature, obtains real-time water temperature T
gand be sent to single-chip microcomputer;
The remote control of infrared remote control module arranges the target water temperature T needing to reach
wand be sent to single-chip microcomputer;
Sounding module is at described target water temperature T
wsound production prompt is successfully set;
Display module shows real-time water temperature T
gwith target water temperature T
w;
Single-chip microcomputer is according to described real-time water temperature T
gwith described target water temperature T
wcalculate water temperature difference e=T
w-T
gwith difference rate of change ec=de/dt, and compare the absolute value of water temperature difference | e| and predetermined threshold value e
0, when | e|>=e
0time, adopt Bang-Bang variable structure control method to carry out control heating by temperature control modules to heating module, when | e|<e
0time, adopt the PWM control method based on Adaptive PID Control to carry out control heating by temperature control modules to heating module, make water temperature finally reach target water temperature T
w.
Further, described employing Bang-Bang variable structure control method carries out control heating by temperature control modules to heating module, specifically comprises:
Change the maximal value and minimum value that use Bang-Bang variable-structure control function back and forth, thus the power-off of control temperature control module and "on" position, and then control heating module heating, water temperature is raised.
Further, described employing carries out control heating by temperature control modules to heating module based on the PWM control method of Adaptive PID Control, specifically comprises:
Adaptive PID Control parameter is chosen: Proportional coefficient K according to described water temperature difference and described difference rate of change
p, integral coefficient K
iwith differential coefficient K
d;
According to the Proportional coefficient K chosen
p, integral coefficient K
iwith differential coefficient K
dstable output is produced by Adaptive PID Control;
The stable output produce Adaptive PID Control and sawtooth wave compare, and obtain PWM ripple;
According to power-off and the "on" position of the Duty ratio control temperature control modules of PWM ripple, thus control heating module, make water temperature reach target water temperature T
w.
Further, describedly Adaptive PID Control parameter is chosen according to described water temperature difference and described difference rate of change: Proportional coefficient K
p, integral coefficient K
iwith differential coefficient K
d, specifically comprise:
Water temperature difference e is greater than threshold value e
1time, K
pvalue is greater than threshold k
p1, K
dvalue is less than threshold k
d1, K
iget 0;
Water temperature difference e is less than threshold value e
2time, K
pvalue is greater than threshold k
p1, K
ivalue is greater than threshold k
i1, K
dget threshold k
d1or K
d1neighbouring value;
Water temperature difference e is less than threshold value e
1be greater than threshold value e
2time, K
pvalue is less than threshold k
p1, K
dvalue is less than threshold k
d1, K
iget threshold k
i1or K
i1neighbouring value, wherein, e
1>e
2.
Implement the present invention, there is following beneficial effect:
Native system compares to traditional PID water temperature control system in temperature control, and response is more rapid, and relative error is less, and degree of accuracy is higher, and energy resource consumption is few.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the system chart of an embodiment of Intelligent water temperature control system provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the system chart of an embodiment of Intelligent water temperature control system provided by the invention, as shown in Figure 1, comprising: temperature-measuring module 101, infrared remote control module 102, display module 103, sounding module 104, single-chip microcomputer 105, temperature control modules 106 and heating module 107.
Wherein, temperature-measuring module 101, for Real-Time Monitoring water temperature, obtains real-time water temperature T
gand be sent to single-chip microcomputer 105; Infrared remote control module 102 arranges the target water temperature T needing to reach for remote control
wand be sent to single-chip microcomputer 105; Sounding module 104 is at target water temperature T
wsound production prompt is successfully set; Display module 103 is for showing real-time water temperature T
gwith target water temperature T
w; Single-chip microcomputer 105 is for according to real-time water temperature T
gwith target water temperature T
wcalculate water temperature difference e=T
w-T
gwith difference rate of change ec=de/dt, and compare the absolute value of water temperature difference | e| and predetermined threshold value e
0, when | e|>=e
0time, adopt Bang-Bang variable structure control method to carry out control heating by temperature control modules 106 pairs of heating modules 107, when | e|<e
0time, adopt the PWM control method based on Adaptive PID Control to carry out control heating by temperature control modules 106 pairs of heating modules 107, make water temperature finally reach target water temperature T
w.
Wherein, infrared remote control module 102 comprises Infrared remote controller and model is the infrared receiving terminal of HX1838, and the infrared receiving terminal of HX1838 connects single-chip microcomputer, and Infrared remote controller is used for target setting water temperature T
wand send target water temperature T
wto infrared receiving terminal, infrared receiving terminal is used for target water temperature T
wbe sent to single-chip microcomputer.
Wherein, temperature control modules 106 is specially relay, and temperature-measuring module 101 is specially the temperature sensor that model is DS18B20, display module 103 for model be the LCDs of 12864, single-chip microcomputer 105 model is STC89C58.Sounding module 104 is specially hummer.
Present invention also offers an embodiment of Intelligent water control method, the method is based on above-mentioned Intelligent water temperature control system, then method comprises step:
S101, temperature-measuring module Real-Time Monitoring water temperature, obtain real-time water temperature T
gand be sent to single-chip microcomputer.
S102, the remote control of infrared remote control module arrange the target water temperature T needing to reach
wand be sent to single-chip microcomputer.
S103, sounding module are at described target water temperature T
wsound production prompt is successfully set.
S104, display module show real-time water temperature T
gwith target water temperature T
w.
S105, single-chip microcomputer are according to described real-time water temperature T
gwith described target water temperature T
wcalculate water temperature difference e=T
w-T
gwith difference rate of change ec=de/dt, and compare the absolute value of water temperature difference | e| and predetermined threshold value e
0, when | e|>=e
0time, adopt Bang-Bang variable structure control method to carry out control heating by temperature control modules to heating module, when | e|<e
0time, adopt the PWM control method based on Adaptive PID Control to carry out control heating by temperature control modules to heating module, make water temperature finally reach target water temperature T
w.
Wherein, described employing Bang-Bang variable structure control method carries out control heating by temperature control modules to heating module, specifically comprises:
Change the maximal value and minimum value that use Bang-Bang variable-structure control function back and forth, thus the power-off of control temperature control module and "on" position, and then control heating module heating, water temperature is raised.
Wherein, described employing carries out control heating by temperature control modules to heating module based on the PWM control method of Adaptive PID Control, specifically comprises:
Adaptive PID Control parameter is chosen: Proportional coefficient K according to described water temperature difference and described difference rate of change
p, integral coefficient K
iwith differential coefficient K
d;
According to the Proportional coefficient K chosen
p, integral coefficient K
iwith differential coefficient K
dstable output is produced by Adaptive PID Control;
The stable output produce Adaptive PID Control and sawtooth wave compare, and obtain PWM ripple;
According to power-off and the "on" position of the Duty ratio control temperature control modules of PWM ripple, thus control heating module, make water temperature reach target water temperature T
w.
Wherein, describedly Adaptive PID Control parameter is chosen according to described water temperature difference and described difference rate of change: Proportional coefficient K
p, integral coefficient K
iwith differential coefficient K
d, concrete steps be:
Water temperature difference e is greater than threshold value e
1time, K
pvalue is greater than threshold k
p1, K
dvalue is less than threshold k
d1, K
iget 0;
Water temperature difference e is less than threshold value e
2time, K
pvalue is greater than threshold k
p1, K
ivalue is greater than threshold k
i1, K
dget threshold k
d1or K
d1neighbouring value,
Water temperature difference e is less than threshold value e
1be greater than threshold value e
2time, K
pvalue is less than threshold k
p1, K
dvalue is less than threshold k
d1, K
iget threshold k
i1or K
i1neighbouring value, wherein, e
1>e
2.
Experimental verification is carried out to the present invention, record the equilibrium temperature of the control method adopting Bang-Bang variable-structure control and Adaptive PID Control to combine, relative error and time of arrival, under being recorded in same settings temperature simultaneously, the equilibrium temperature of independent PID control method, relative error and time of arrival.As shown in table 1, wherein, initial water temperature is 27.7 DEG C.
Table 1
Analyze the data obtained, temperature error is at about 1 DEG C, and relative error is less than 4%, and native system compares to traditional PID water temperature control system in temperature control, and response is more rapid, and relative error is less, and degree of accuracy is higher, and energy resource consumption is few.
It should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or device and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or device.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the device comprising this key element and also there is other identical element.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In several embodiments that the application provides, should be understood that, disclosed system and method can realize by another way.Such as, system embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an Intelligent water temperature control system, is characterized in that, comprising: temperature-measuring module, infrared remote control module, display module, sounding module, single-chip microcomputer, temperature control modules and heating module, wherein,
Described temperature-measuring module is used for Real-Time Monitoring water temperature, obtains real-time water temperature T
gand be sent to single-chip microcomputer; Described infrared remote control module is used for remote control and arranges the target water temperature T needing to reach
wand be sent to single-chip microcomputer; Described sounding module is used at described target water temperature T
wsound production prompt is successfully set; Described display module is for showing real-time water temperature T
gwith described target water temperature T
w; Described single-chip microcomputer is used for according to described real-time water temperature T
gwith described target water temperature T
wcalculate water temperature difference e=T
w-T
gwith difference rate of change ec=de/dt, and compare the absolute value of water temperature difference | e| and predetermined threshold value e
0, when | e|>=e
0time, adopt Bang-Bang variable structure control method to carry out control heating by temperature control modules to heating module, when | e|<e
0time, adopt the PWM control method based on Adaptive PID Control to carry out control heating by temperature control modules to heating module, make water temperature finally reach target water temperature T
w.
2. Intelligent water temperature control system as claimed in claim 1, it is characterized in that, described infrared remote control module comprises Infrared remote controller and model is the infrared receiving terminal of HX1838, and the infrared receiving terminal of described HX1838 connects described single-chip microcomputer, and described Infrared remote controller is used for target setting water temperature T
wand send target water temperature T
wto described infrared receiving terminal, described infrared receiving terminal is used for described target water temperature T
wbe sent to described single-chip microcomputer.
3. Intelligent water temperature control system as claimed in claim 1, it is characterized in that, described temperature control modules is specially relay.
4. Intelligent water temperature control system as claimed in claim 1, it is characterized in that, described temperature-measuring module is specially the temperature sensor that model is DS18B20, described display module to be model be 12864 LCDs.
5. Intelligent water temperature control system as claimed in claim 1, it is characterized in that, described single-chip microcomputer model is STC89C58.
6. Intelligent water temperature control system as claimed in claim 1, it is characterized in that, described sounding module is specially hummer.
7. an Intelligent water control method, is characterized in that, described method is based on the Intelligent water temperature control system in claim 1-6 described in any one, then described method comprises:
Temperature-measuring module Real-Time Monitoring water temperature, obtains real-time water temperature T
gand be sent to single-chip microcomputer;
The remote control of infrared remote control module arranges the target water temperature T needing to reach
wand be sent to single-chip microcomputer;
Sounding module is at described target water temperature T
wsound production prompt is successfully set;
Display module shows real-time water temperature T
gwith target water temperature T
w;
Single-chip microcomputer is according to described real-time water temperature T
gwith described target water temperature T
wcalculate water temperature difference e=T
w-T
gwith difference rate of change ec=de/dt, and compare the absolute value of water temperature difference | e| and predetermined threshold value e
0, when | e|>=e
0time, adopt Bang-Bang variable structure control method to carry out control heating by temperature control modules to heating module, when | e|<e
0time, adopt the PWM control method based on Adaptive PID Control to carry out control heating by temperature control modules to heating module, make water temperature finally reach target water temperature T
w.
8. Intelligent water control method as claimed in claim 7, is characterized in that, described employing Bang-Bang variable structure control method carries out control heating by temperature control modules to heating module, specifically comprises:
Change the maximal value and minimum value that use Bang-Bang variable-structure control function back and forth, thus the power-off of control temperature control module and "on" position, and then control heating module heating, water temperature is raised.
9. Intelligent water control method as claimed in claim 7, is characterized in that, described employing carries out control heating by temperature control modules to heating module based on the PWM control method of Adaptive PID Control, specifically comprises:
Adaptive PID Control parameter is chosen: Proportional coefficient K according to described water temperature difference and described difference rate of change
p, integral coefficient K
iwith differential coefficient K
d;
According to the Proportional coefficient K chosen
p, integral coefficient K
iwith differential coefficient K
dstable output is produced by Adaptive PID Control;
The stable output produce Adaptive PID Control and sawtooth wave compare, and obtain PWM ripple;
According to power-off and the "on" position of the Duty ratio control temperature control modules of PWM ripple, thus control heating module, make water temperature reach target water temperature T
w.
10. Intelligent water control method as claimed in claim 9, is characterized in that, describedly chooses Adaptive PID Control parameter according to described water temperature difference and described difference rate of change: Proportional coefficient K
p, integral coefficient K
iwith differential coefficient K
d, specifically comprise:
Water temperature difference e is greater than threshold value e
1time, K
pvalue is greater than threshold k
p1, K
dvalue is less than threshold k
d1, K
iget 0;
Water temperature difference e is less than threshold value e
2time, K
pvalue is greater than threshold k
p1, K
ivalue is greater than threshold k
i1, K
dget threshold k
d1or K
d1neighbouring value;
Water temperature difference e is less than threshold value e
1be greater than threshold value e
2time, K
pvalue is less than threshold k
p1, K
dvalue is less than threshold k
d1, K
iget threshold k
i1or K
i1neighbouring value, wherein, e
1>e
2.
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| CN112121274A (en) * | 2020-08-14 | 2020-12-25 | 广州和普乐健康科技有限公司 | Heating control method and device for heating pipe, storage medium and computer equipment |
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