CN109668326A - A kind of instant heating type dynamic temperature control method based on pid algorithm - Google Patents
A kind of instant heating type dynamic temperature control method based on pid algorithm Download PDFInfo
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- CN109668326A CN109668326A CN201910022721.5A CN201910022721A CN109668326A CN 109668326 A CN109668326 A CN 109668326A CN 201910022721 A CN201910022721 A CN 201910022721A CN 109668326 A CN109668326 A CN 109668326A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2028—Continuous-flow heaters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Temperature (AREA)
Abstract
The instant heating type dynamic temperature control method based on pid algorithm that present invention relates particularly to a kind of, this method step is: step 1: the i.e. fever pipe in water heater heats water inlet, i.e., heat sensor detects the water temperature in i.e. fever pipe and exports heating water temperature parameters；Step 2: the water present sensor in water heater detects leaving water temperature and exports hot water water temperature parameters；Step 3:PID controller is respectively received hot water water temperature parameters and leaving water temperature parameter, power required for temperature is set separately according to parameter in PID controller: Us (t)=Us (t-1)+a ╳ e (t)+b ╳ e (t-1)+c ╳ e (t-2), the power parameter of step 4:PID controller calculating is simultaneously delivered to control power output controller, controls the output power of power output controller；Step 5: control is the working condition of fever pipe.The beneficial effects of the present invention are: this structure acts the purpose for reaching accurate temperature control by being that heat sensor, water present sensor, PID controller and power output controller are applied in combination.
Description
Technical field
The present invention relates to immediately heating water heater technical fields, and in particular to a kind of instant heating type dynamic temperature based on pid algorithm
Control method.
Background technique
Existing instant heating type household appliances, such as immediately heating water heater, the leaving water temperature of immediately heating water heater are sometimes hot and sometimes cold not
The case where enough stabilizations, there is also Various Seasonals to use identical water heater for some, and leaving water temperature is unable to reach set temperature.
There is fluctuation on a large scale in the leaving water temperature of heating water heater, and then causes inconvenience to the use of user, even
There is the accident scalded.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, provide it is a kind of can reduce cost, make output miss
Within difference control 10%, effectively reduces the electrolysis of water and promote the instant heating type dynamic temperature based on pid algorithm of the service life of probe
Control method.
A kind of instant heating type dynamic temperature control method based on pid algorithm that the present invention describes, the method steps are as follows.
Step 1: the i.e. fever pipe in water heater heats water inlet, i.e. heat sensor detection is in fever pipe
Water temperature and export heating water temperature parameters.
Step 2: the water present sensor in water heater detects leaving water temperature and exports hot water water temperature parameters.
Step 3:PID controller is respectively received hot water water temperature parameters and leaving water temperature parameter, and PID controller is according to parameter
Power required for temperature is set separately.
Us (t)=Us (t-1)+a ╳ e (t)+b ╳ e (t-1)+c ╳ e (t-2).
Wherein Us (t) is controller output, and t is sampling time, a=Kp+Ki+Kd, b=- Kp-2Kd, C=Kd.
The power parameter of step 4:PID controller calculating is simultaneously delivered to control power output controller, controls power output
The output power of controller.
Step 5: controlling the output power i.e. working condition of fever pipe of power output controller.
It is specific further, when deviation e (t) is less than the minimum deflection emin (t) that system allows, PID controller output control
Remaining unchanged of amount processed.
It is specific further, when deviation e (t) is less than the minimum deflection emax (t) that system allows, PID controller output control
Amount processed increases to reduce deviation.
It is specific further, work as e(t) > 0, illustrate that actual value deviates setting value, needs reduction output quantity appropriate.
It is specific further, work as e(t) < 0, illustrate that actual value deviates setting value, deviation is smaller and smaller, can keep at this time
Output quantity is constant or varies less, so that actual value infinitely approaches setting value.
It is specific further, the model MC9S12DG128 of the PID controller.
Specific further, described is between heat sensor and PID controller by being that thermal signal transmitting circuit is connected, out
It is connected between water sensor and PID controller by being discharged signal transfer circuit.
Specific further, the PID controller, which is equipped with, controls regular device.
The beneficial effects of the present invention are: this structure is defeated by being heat sensor, water present sensor, PID controller and power
Controller combination uses out, and power output controller is made effectively to control the working condition of i.e. fever pipe, coolant-temperature gage occurs big
The fluctuation of range further decreases, and acts the purpose for reaching accurate temperature control.
Detailed description of the invention
Fig. 1 is i.e. thermal signal transmitting circuit figure of the invention.
Fig. 2 is water outlet signal transfer circuit figure of the invention.
Fig. 3 is PID controller of the invention, fuction output controller and controls regular device and be connected schematic diagram.
Fig. 4 is i.e. thermal signal transmitting circuit of the invention, water outlet signal transfer circuit, PID controller, fuction output control
Device controls regular device, i.e. fever pipe, i.e. heat sensor and water present sensor and is connected schematic diagram.
Description of symbols in attached drawing: i.e. thermal signal transmitting circuit 1；It is discharged signal transfer circuit 2；PID controller 3；Function number
Controller 4 out；Control regular device 5；That is fever pipe 6；That is heat sensor 7；Water present sensor 8；
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein identical from beginning to end
Or similar label indicates same or similar element or element with the same or similar functions.It is retouched below with reference to attached drawing
The embodiment stated is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
A kind of instant heating type dynamic temperature control based on pid algorithm according to an embodiment of the present invention is described below with reference to Fig. 1 to Fig. 4
Method processed, the method steps are as follows.
Step 1: i.e. 6 pairs of water inlets of fever pipe in water heater are heated, i.e. the detection of heat sensor 7 is fever pipe
Water temperature in 6 and export heating water temperature parameters.
Step 2: the water present sensor 8 in water heater detects leaving water temperature and exports hot water water temperature parameters.
Step 3:PID controller 3 is respectively received hot water water temperature parameters and leaving water temperature parameter, and PID controller is according to ginseng
Power required for temperature is set separately in number.
Us (t)=Us (t-1)+a ╳ e (t)+b ╳ e (t-1)+c ╳ e (t-2).
Wherein Us (t) is controller output, and t is sampling time, a=Kp+Ki+Kd, b=- Kp-2Kd, C=Kd.
The power parameter of the calculating of step 4:PID controller 3 is simultaneously delivered to control power output controller 4, and control power is defeated
The output power of controller 4 out.
Step 5: output power, that is, fever pipe 6 working condition of control power output controller 4.
This structure is by being that heat sensor 7, water present sensor 8, PID controller 3 and the combination of power output controller 4 make
With, make the working condition of the effectively i.e. fever pipe 6 of control of power output controller 4, make coolant-temperature gage occur it is large-scale fluctuate into
One step reduces.
Proportional coefficient KP, integral coefficient KIWith differential coefficient KdThe individual being expressed as in differential evolution algorithm operation population,
Adaptation using a comprehensive performance indicator for measuring stability of control system, rapidity and accuracy as differential evolution algorithm
Index is spent, obtains optimal PID controller parameter using differential evolution algorithm search；It is obtained most using differential evolution algorithm search
Excellent PID controller parameter.
Water supply process is as follows: 3 temperature of PID controller being first set to the temperature of bathing needs, at once in fever pipe 6
When temperature needed for water temperature is lower than bathing, i.e., heat sensor 7 perceives temperature, and water temperature information parameter is transferred to PID controller 3
Program is arranged in processing, PID controller 3 based on the feedback signal, determines the temperature value of heating water, and feedback signal is identical with setting value
When, it is exported on electric signal parameter input power o controller 4 by PID controller 3, makes the driving of power output controller 4 i.e.
Fever pipe 6 is in heated condition, increase the water temperature of water, and is heated into hot water output, at this point, water present sensor 8 detects
The temperature value of water outlet, water present sensor 8 export hot water water temperature parameters and are transmitted in PID controller 3, hot water water temperature parameters and setting
When value judges identical, the output of water present sensor 8 continues an electric signal parameter, makes the control of power output controller 4 i.e. fever
Pipe 6 is in a heated condition, which is in the heating of assigned temperature value, enables water temperature held stationary state, play precisely
The purpose of temperature control.
The wherein model MC9S12DG128 of the PID controller.Temperature institute is set separately according to parameter in PID controller
The power needed: Us (t)=Us (t-1)+a ╳ e (t)+b ╳ e (t-1)+c ╳ e (t-2), output control signal parameter to power
On o controller 4, power output controller 4 controls voltage, and i.e. fever pipe 6 is made to be in heating with full power state or half
Power heated condition or stopping heated condition.
The PID controller 3, which is equipped with, controls regular device 5, and the function of controlling regular device 5 is forecast by the change rate of error
The future trends of error signal；Controlled process can be made to tend towards stability by providing controls in advance effect.Therefore, it is passed through
It is commonly used to offset the unstable trend that integration control generates.
Wherein, when deviation e (t) is less than the minimum deflection emin (t) that system allows, PID controller exports control amount and protects
It holds and does not change.
Alternatively, PID controller exports control amount and increases when deviation e (t) is less than the minimum deflection emax (t) that system allows
Greatly to reduce deviation.
Alternatively, working as e(t) > 0, illustrate that actual value deviates setting value, needs reduction output quantity appropriate.
Alternatively, working as e(t) < 0, illustrate that actual value deviates setting value, deviation is smaller and smaller, can keep output quantity at this time
It is constant or vary less, so that actual value infinitely approaches setting value.
Wherein, Se (t) is input variable in attached drawing 3, and Tu (t) is output variable, and e (t)=Tu (t)-Se (t) is deviation
Value, Us (t) are by PID controller treated power demand values.
By above-mentioned several PID controller output states, power output controller 4 is made to be in different working conditions, function
4 output voltage values of rate o controller are different, so that control is the working condition of fever pipe 6.
As shown in figure 4, of the present invention is between heat sensor 7 and PID controller 3 by being thermal signal transmitting circuit 1
It is connected, is connected between water present sensor 8 and PID controller 3 by being discharged signal transfer circuit 2.Wherein as shown in Figure 1,
I.e. thermal signal transmitting circuit 1 includes the first connector CN1, first resistor R1, second resistance R2 and first capacitor C1, the first connector
1 foot of CN1 is connected in series with first resistor R1, second resistance R2 and first capacitor C1 is in parallel and 1 foot with the first connector CN1
It is connected, i.e., fever pipe 6 is connected to the first connector CN1, the i.e. detection of the heat sensor 7 i.e. water temperature of fever pipe 6, i.e., hot sensing
The electric signal parameter that device 7 exports is transmitted in PID controller 3 from i.e. thermal signal transmitting circuit 1, i.e., thermal signal transmitting circuit 1 is gone back
Play the role of controlling voltage, prevents overtension from damaging PID controller 3.In addition,
As shown in Fig. 2, water outlet signal transfer circuit 2 includes the second connector CN2,3rd resistor R3, the electricity of the 4th resistance R4 and second
Hold C2,1 foot and the 3rd resistor R3 of the second connector CN2 be connected in series, and the 4th resistance R4 and the second capacitor C2 are in parallel and with the
1 foot of two connector CN2 is connected.Water present sensor 8 is connected to the second connector CN2, and water present sensor 8 detects the water outlet of water heater
Water temperature, and output water temperature parameter is exported, output output water temperature parameter enters in PID controller 3.
Upper is only presently preferred embodiments of the present invention, is not intended to limit the invention, all in spirit and original of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within then.
Claims (8)
1. a kind of instant heating type dynamic temperature control method based on pid algorithm, it is characterised in that: this method step is:
Step 1: i.e. fever pipe (6) in water heater heat water inlet, i.e. the detection of heat sensor 7 is fever pipe
(6) water temperature in and heating water temperature parameters are exported；
Step 2: the water present sensor (8) in water heater detects leaving water temperature and exports hot water water temperature parameters；
Step 3:PID controller is respectively received hot water water temperature parameters and leaving water temperature parameter, and PID controller is distinguished according to parameter
Power required for set temperature:
Us (t)=Us (t-1)+a ╳ e (t)+b ╳ e (t-1)+c ╳ e (t-2)；
Wherein Us (t) is controller output, and t is sampling time, a=Kp+Ki+Kd, b=- Kp-2Kd, C=Kd；
The power parameter of step 4:PID controller (3) calculating is simultaneously delivered to control power output controller (4), and control power is defeated
The output power of controller 4 out；
Step 5: output power, that is, fever pipe (6) working condition of control power output controller (4).
2. a kind of instant heating type dynamic temperature control method based on pid algorithm according to claim 1, it is characterised in that: when inclined
When poor e (t) is less than the minimum deflection emin (t) that system allows, PID controller (3) exports remaining unchanged of control amount.
3. a kind of instant heating type dynamic temperature control method based on pid algorithm according to claim 1, it is characterised in that: when inclined
When poor e (t) is less than the minimum deflection emax (t) that system allows, PID controller (3) exports control amount and increases to reduce deviation.
4. a kind of instant heating type dynamic temperature control method based on pid algorithm according to claim 1, it is characterised in that: work as e
(t) > 0, illustrate that actual value deviates setting value, need reduction output quantity appropriate.
5. a kind of instant heating type dynamic temperature control method based on pid algorithm according to claim 1, it is characterised in that: work as e
(t) < 0, illustrating that actual value deviates setting value, deviation is smaller and smaller, and it can keep output quantity constant at this time or vary less,
So that actual value infinitely approaches setting value.
6. a kind of instant heating type dynamic temperature control method based on pid algorithm according to claim 1, it is characterised in that: described
The model MC9S12DG128 of PID controller (3).
7. a kind of instant heating type dynamic temperature control method based on pid algorithm according to claim 1, it is characterised in that: described
I.e. by being that thermal signal transmitting circuit 1 is connected between heat sensor (7) and PID controller (3), water present sensor (8) and PID
It is connected between controller (3) by being discharged signal transfer circuit 2.
8. a kind of instant heating type dynamic temperature control method based on pid algorithm according to claim 1, it is characterised in that: described
PID controller (3), which is equipped with, controls regular device (5).
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| CN201910022721.5A CN109668326A (en) | 2019-01-10 | 2019-01-10 | A kind of instant heating type dynamic temperature control method based on pid algorithm |
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| CN201910022721.5A CN109668326A (en) | 2019-01-10 | 2019-01-10 | A kind of instant heating type dynamic temperature control method based on pid algorithm |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779268A (en) * | 2019-10-25 | 2020-02-11 | 长虹美菱股份有限公司 | Refrigerator internal temperature control system algorithm |
| CN112016162A (en) * | 2020-09-05 | 2020-12-01 | 江西理工大学 | Four-rotor unmanned aerial vehicle PID controller parameter optimization method |
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| JPS58208535A (en) * | 1982-05-28 | 1983-12-05 | Matsushita Electric Ind Co Ltd | Controller for hot water feeder |
| CN101825342A (en) * | 2010-05-18 | 2010-09-08 | 上海天剑电磁技术有限公司 | Water temperature control method of instant heating type electromagnetic induction water heater |
| CN101957598A (en) * | 2010-09-26 | 2011-01-26 | 上海电力学院 | Gray model-free control method for large time lag system |
| CN103727677A (en) * | 2014-01-02 | 2014-04-16 | 福州斯狄渢电热水器有限公司 | Instant heating type water heater constant temperature control system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779268A (en) * | 2019-10-25 | 2020-02-11 | 长虹美菱股份有限公司 | Refrigerator internal temperature control system algorithm |
| CN110779268B (en) * | 2019-10-25 | 2021-09-28 | 长虹美菱股份有限公司 | Refrigerator internal temperature control system algorithm |
| CN112016162A (en) * | 2020-09-05 | 2020-12-01 | 江西理工大学 | Four-rotor unmanned aerial vehicle PID controller parameter optimization method |
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Application publication date: 20190423 |