CN104791282A - Speed adjusting method for infrared temperature-control electric fan - Google Patents

Speed adjusting method for infrared temperature-control electric fan Download PDF

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Publication number
CN104791282A
CN104791282A CN201410759954.0A CN201410759954A CN104791282A CN 104791282 A CN104791282 A CN 104791282A CN 201410759954 A CN201410759954 A CN 201410759954A CN 104791282 A CN104791282 A CN 104791282A
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pmv
value
temperature
human body
speed
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CN201410759954.0A
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CN104791282B (en
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姚江云
梁喜幸
余玲
梁锡铅
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Lushan College of Guangxi University of Science and Technology
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Lushan College of Guangxi University of Science and Technology
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Abstract

The invention discloses a speed adjusting method for an infrared temperature-control electric fan. The method comprises the steps that system initialization is performed; an ideal thermal comfort index PMV value and upper and lower PMV threshold values are set; a controller monitors the current human body temperature and environment temperature in real time, a current human body PMV value is calculated by the measured temperature through a PMV simplified model, and a difference value between the current human body value and the ideal value is calculated; temperature control threshold value criterion is performed on the difference value, the PMV adjusting quantity is set according to the criterion condition, the PMV adjusting quantity calculates a current needed motor rotation speed value through a PMV rotation speed model, the percentage of the rotation speed value accounting for the motor maximum rotation speed value is calculated and serves as the PWM duty ratio to output a PWM waveform, therefore, the fan motor revolution number can be controlled, and temperature control speed adjusting can be achieved. According to the speed adjusting method for the infrared temperature-control electric fan, the PMV rotation speed model used for adjusting the speed is established, and speed adjusting can be performed with the purpose of the optimal comfort degree of the human body.

Description

A kind of infrared temp. control electric fan speed regulating method
Technical field
The present invention relates to a kind of fan motor speed regulating method, be specifically related to a kind of infrared temp. control electric fan speed regulating method.
Background technique
The temperature-controlled fan speed regulating method of current existence, general all possess the function automatically regulating rotation speed of the fan or environmentally temperature automatic adjustment rotation speed of the fan according to human body temperature, but in regulating method all not to adjustment according to being described, namely how to regulate, the size of regulated quantity and how to regulate problem not specified (NS)s such as making human comfort high; Further, speed regulating method also exist temperature threshold regulation and control drawback, namely when human body temperature drop to threshold value is set time electric fan close, higher than during this threshold value electric fan open.If human body temperature is when this Near Threshold fluctuates, then electric fan meeting frequent start-stop, affects electrical machinery life, and can not carry out speed governing according to body compartments's hot comfort situation.
If application number is 200910193968, the applying date is on November 17th, 2009, authorized announcement date is that the Chinese invention patent on May 23rd, 2012 discloses a kind of multi-mode temperature control fan governor, comprise mode of operation selector switch, human body pyroelectricity infrared detection module, temperature collect module, power module, control treatment module, solid-state relay, electric fan and temperature display module, this temperature regulate speed method is: the temperature information input temperature collect module and temperature predefined value contrast, when the temperature information of described input is more than or equal to the temperature predefined value of control treatment module, the PWM ripple of corresponding dutycycle is exported to solid-state relay according to described reduced value, solid-state relay is opened electric fan according to the PWM ripple of this corresponding dutycycle and is determined its rotating speed, otherwise, output duty cycle is that the PWM ripple of 0 is to solid-state relay, electric fan is made to be in closed condition.Although the method can realize temperature regulate speed function, lack fan speed and regulate foundation, the problem of speed governing in regulating step, can not be carried out according to body compartments's hot comfort situation.
If application number is 200620014446, the applying date is on 08 30th, 2006, authorized announcement date is that the Chinese utility model patent of on 09 05th, 2007 discloses a kind of automatic temperature-controlling electric fan, comprise circuit for controlling motor, fan, motor, human body sensing device, two-way controlable electric current and temperature sensor circuit, this temperature regulate speed method is: two-way controlable electric current is used for exporting to open when human body sensing device exports useful signal and the temperature that temperature sensor circuit senses is more than or equal to the first setting value controlling signal to circuit for controlling motor, do not export in human body sensing device and export pass when temperature that useful signal or temperature sensor circuit sense is less than the first setting value and control signal to circuit for controlling motor, circuit for controlling motor is used for after opening control signal, controlling electric machine rotation in response, after the control signal of pass, motor stalls is controlled in response.This speed regulating method, only according to set value calculation motor start and stop, can not carry out the problem of speed governing according to the interval comfort level situation of Studies of Human Body Heat.
Above two kinds of electric fan temperature regulate speed methods all lack speed governing foundation, with human body optimum reelability quality for target carries out speed governing, also can solve the problem of carrying out speed governing according to body compartments's hot comfort situation.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, a kind of infrared temp. control electric fan speed regulating method is provided.This temperature regulate speed method all the time with human body optimal comfort setting value for target, adopt PMV rotating speed model to carry out speed governing, human comfort be worth and remain at optimum level; Threshold value discriminating step is added in fan electromotor speed governing; the setting upper limit threshold of compressor start up condition and the lower threshold of halt condition; the problem again starting temperature regulate speed after electric fan is shut down can be realized, avoid checkout value when Near Threshold fluctuates, the problem of electric fan meeting frequent start-stop.
For solving the problems of the technologies described above, the invention provides a kind of infrared temp. control electric fan speed regulating method, comprising:
As shown in Figure 1, the desirable pmv value I of S1. initialization pMV, thermal comfort index PMV upper limit threshold ε +with lower threshold ε -.
S2. controller carries out infrared measurement of temperature by human body infrared temperature sensing circuit, environment infrared temperature sensing circuit, Real-Time Monitoring current human temperature t hwith ambient temperature t e.
Set up thermal comfort index PMV simplified model, known person body heat comfort index model is:
(1)
Wherein, M is body energy metabolic rate (W/m2), the mechanical work (W/m2) that W does for human body, P afor the steam partial pressure (kPa) of human body surrounding atmosphere, h cfor human body surface convection transfer rate (W/m2K), t afor human body ambient air temperature (DEG C), t rfor the mean radiant temperature (DEG C) in room, f clhuman body external surface area and the ratio not covering body surface area is covered, t for wearing the clothes clfor human body clothes hull-skin temperature (DEG C).
Model is simplified, makes body energy metabolic rate M=58.18 W/m2, the mechanical work W=0 that human body does, surface area ratio f cl=1.1, steam partial pressure P a=1.5kPa, convection transfer rate h c=4.84 W/m 2k, human peripheral air temperature t awith the mean radiant temperature t in room r, survey ambient temperature t eequal, human body clothes hull-skin temperature t clhuman body temperature t is surveyed with infrared senor hequal; Therefore, thermal comfort index PMV simplified model can be obtained:
(2)
Wherein, t hfor infrared senor institute's human body temperature (DEG C), t efor infrared senor institute's testing environment temperature (DEG C).
S3. according to detected current human temperature t hwith ambient temperature t ehuman body current thermal comfort index pmv value C is calculated by PMV simplified model formula (2) pMV, and calculate C pMVwith set desirable thermal comfort index pmv value I pMVdifference E pMV.
S4. the differentiation of temperature control threshold value is carried out, as shown in Figure 1, to thermal comfort index PMV difference e pMV judge with set temperature control threshold size, judge whether human thermal comfort index difference exceeds upper threshold, namely judges E pmv> ε +whether set up, if E pmv> ε +set up and then enter step S5, set described PMV regulated quantity a pMV =E pMV if be false, judge whether human thermal comfort index difference exceeds bottom threshold, i.e. E pmv≤ ε -judge whether to set up, if E pmv≤ ε -set up and then forward step S8 to, fan electromotor stall, otherwise forward step S2 to.
Set up the PMV rotating speed model being used for speed governing, fan motor chooses the single-phase three-speed motor in household fan, it effectively turns number range is 366-1200r/min, thermal comfort span for dispelling the heat is :-1≤PMV≤3, by corresponding with thermal comfort span for effective for single-phase three-speed motor range of revolution as table 1:
The effective range of revolution of the single-phase three-speed motor of table 1 is corresponding with thermal comfort span to be shown
Adopt radial base neural net function to carry out matching to upper table, be input as thermal comfort pmv value regulated quantity a pMV , export as motor rotations S 0, import radial base neural net function and train, obtaining PMV rotating speed model is:
(3)
Wherein: ‖ a pMV - c i ‖ is input quantity a pMV with weights amount c i euclidean distance, w i for the weights between hidden layer to output layer, w i =[ w 1 w 2 w 3 ... w 19 ] t=[0 0.050 0.125 0.175 0.25 0.325 0.375 0.425 0.475 0.575 0.625 0.675 0.7245 0.775 0.8245 0.875 0.925 0.975 1] t, c i =[ c 1 c 2 c 3 ... c 19 ] t=[0 00000 0.3050 0.3833 0.4508 0.5917 0.6583 0.7111 0.7900 0.8083 0.8583 0.8917 0.9167 0.9867 1.0000] t.
S5. thermal comfort index PMV regulated quantity is set a pMV =E pMV , enter step S6.
S6. according to gained pMVregulated quantity a pMV pass through pMVrotating speed modular form (3) calculates the current fan motor rotational speed value being target with human body optimum reelability quality s 0 , and calculate described tachometer value s 0 account for maximum (top) speed value s max percentage η, enter step S7.
S7. by gained percentage ηas pWMdutycycle σexport, enter step S9.
S8. arrange PWM dutycycle σ=0, fan electromotor stall, enters step S9.
S9. driver exports according to controller pWMthe break-make of Waveform Control power tube, reach the object controlling fan electromotor revolution, fan electromotor acts on human body and environment, forms closed-loop temperature control speed governing.
S10. judge whether shutdown, if do not shut down, forward step S2 to, repeat step S2-S9 and realize fan temperature control speed governing; If shutdown, terminates.
For solving the problems of the technologies described above, a kind of infrared temp. control fan speed-regulating device that the present invention adopts, as shown in Figure 2, its structure is by singlechip controller circuit (1), human body infrared temperature sensing circuit (2), environment infrared temperature sensing circuit (3), button display circuit (4), MOSFET drive circuit (5), motor circuit (6) forms, singlechip controller circuit (1) with, human body infrared temperature sensing circuit (2), ambient temperature sensing circuit (3), button display circuit (4), MOSFET drive circuit (5) passes through power line, signal control line connects, MOSFET drive circuit (5) and motor circuit (6) pass through power line, signal control line connects.
As shown in Figure 3, singlechip controller circuit (1) is made up of intergrated circuit U1, quartz crystal XTAL, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, the 7th jiao, the 8th jiao of quartz crystal XTAL and intergrated circuit U1 connects, electric capacity C1, C2 are connected between 7,8 pin of intergrated circuit and ground wire respectively, resistance R1 one end ground connection, one end connects with the 9th pin of electric capacity C3, intergrated circuit U1, and the other end of electric capacity C3 connects with the 10th pin of intergrated circuit U1, VCC, human body infrared temperature sensing circuit (2) is made up of intergrated circuit U2, and the 1st pin of intergrated circuit U2 connects with VCC, and the 2nd pin of intergrated circuit U2 connects with the 2nd pin of intergrated circuit U1, the 3rd pin ground connection of intergrated circuit U2, ambient temperature sensing circuit (3) is made up of infrared receiving tube RHW, resistance R2, and the positive pole of infrared receiving tube RHW connects with the 1st pin of resistance R2, intergrated circuit U1, and the negative pole of infrared receiving tube connects with VCC, button display circuit (4) is by key switch K1-K4, intergrated circuit U4 forms, one end of key switch K1-K4 respectively with 3 of intergrated circuit U1, 4, 5, 6 pin connect, the other end ground connection of key switch K1-K4, the 1-11 pin of intergrated circuit U4 connects with the 11-21 pin of intergrated circuit U1 respectively, 12 pin of intergrated circuit U4 and one end of slide rheostat R3, ground wire connects, 13 pin of intergrated circuit U4 connect with the sliding end of slide rheostat R3, 14 pin of intergrated circuit U4 and the other end of slide rheostat R3, VCC connects, 15 of intergrated circuit U4, 16 pin are unsettled, MOSFET drive circuit (5) is made up of intergrated circuit U3, MOSFET power tube NMOS, voltage-stabiliser tube WZ, 1st pin of intergrated circuit U3 connects with the 2nd pin of power tube NMOS, 2nd pin of intergrated circuit U3 connects with the 3rd pin of power tube NMOS, first pin of voltage-stabiliser tube WZ, ground wire, 3rd pin of intergrated circuit U3 connects with VCC, 4th pin of intergrated circuit U3 connects with the 22nd pin of intergrated circuit U1, and the 2nd pin of voltage-stabiliser tube WZ connects with the 1st pin of power tube NMOS, motor circuit (6) is made up of the single-phase three-speed motor of 220V, single-phase three-speed motor one end connects with mains supply 220V, the high speed tap H end of single-phase three-speed motor connects with the 1st pin of power tube NMOS, the 2nd pin of voltage-stabiliser tube WZ, and the middling speed tap M of single-phase three-speed motor holds and holds unsettled with the low speed tap L of single-phase three-speed motor.
Accompanying drawing explanation
Fig. 1 is working-flow figure of the present invention;
Fig. 2 is system hardware structure block diagram;
Fig. 3 is system hardware circuit diagram.
Embodiment
A kind of infrared temp. control electric fan speed regulating method providing the embodiment of the present invention below in conjunction with accompanying drawing is described further.
As shown in Figure 1, step S1, first initialization is desirable pMVvalue i pMV =0, thermal comfort index pMVupper limit threshold ε +=0.5 and lower threshold ε -=-0.5, enter step S2.
Step S2, controller is by human body infrared temperature sensing circuit, environment infrared temperature sensing circuit Real-Time Monitoring current human temperature t h with ambient temperature t e , enter step S3.
Step S3, according to detected current human's temperature t h with ambient temperature t e pass through pMVsimplified model formula (1) calculates the current thermal comfort index of human body pMVvalue c pMV , and calculate c pMV with set desirable thermal comfort index pMVvalue i pMV difference e pMV , enter step S4.
(1)
Wherein, t h for infrared senor institute's human body temperature (DEG C), t e for infrared senor institute's testing environment temperature (DEG C);
Step S4, to thermal comfort index pMVdifference e pMV judge with set temperature control threshold size, judge whether human thermal comfort index difference exceeds upper threshold, namely judges E pmv> ε +whether set up, if E pmv> ε +set up and then enter step S5, set described PMV regulated quantity a pMV =E pMV if be false, judge whether human thermal comfort index difference exceeds bottom threshold, namely judges E pmv≤ ε -whether set up, if E pmv≤ ε -set up and then enter step S8, otherwise forward step S2 to.
Step S5, setting thermal comfort index PMV regulated quantity a pMV =E pMV , enter step S6.
Step S6, according to gained pMVregulated quantity a pMV pass through pMVrotating speed modular form (2) calculates the current fan motor rotational speed value being target with human body optimum reelability quality s 0 , and calculate described tachometer value s 0 account for maximum (top) speed value s max percentage η, enter step S7.
pMVrotating speed model is:
(2)
Wherein: ‖ a pMV - c i ‖ is input quantity a pMV with the Euclidean distance of weights amount, w i for the weights between hidden layer to output layer, w i =[ w 1 w 2 w 3 ... w 19 ] t=[0 0.050 0.125 0.175 0.25 0.325 0.375 0.425 0.475 0.575 0.625 0.675 0.7245 0.775 0.8245 0.875 0.925 0.975 1] t, c i =[ c 1 c 2 c 3 ... c 19 ] t=[0 00000 0.3050 0.3833 0.4508 0.5917 0.6583 0.7111 0.7900 0.8083 0.8583 0.8917 0.9167 0.9867 1.0000] t.
Step S7, by gained percentage ηas pWMdutycycle σ, controller is according to dutycycle σexport PWM waveform, enter step S9.
Step S8, PWM dutycycle, fan electromotor stall enters step S9.
Step S9, driver exports according to controller pWMthe break-make of Waveform Control power tube, reach the object controlling fan electromotor revolution, fan electromotor acts on human body and environment, realizes temperature regulate speed.
Step S10, judges whether shutdown, if do not shut down, forwards step S2 to, repeats the fan temperature control speed governing that step S2-S9 realizes circulation on-line monitoring; If shutdown, terminates.
A kind of infrared temp. control fan speed-regulating device that the present invention adopts, its processing and fabricating is simple and convenient, processes shown in by specification accompanying drawing.Intergrated circuit in each circuit and other elements are commercially available prod, and the connection in circuit between each chip is all the Single-chip Controlling Placement of standard, as long as get final product work by circuit diagram installation is errorless.The intergrated circuit model used in circuit is respectively: U1 is singlechip controller, and model is SST89E516RD; U2 is infrared sensor of the human body model is D205B; U3 is MOSFET driving chip model is MIC5104; U4 is LCD display model is LCD1602.
A kind of infrared temp. control fan speed-regulating device working procedure that the present invention adopts is as follows:
After switching on power, singlechip controller carries out initialization, LCD display carries out initialization, then single-chip microcomputer detects button, and implement the data of monitoring human infrared senor and infrared receiving tube, institute's Monitoring Data is shown, and fan motor rotational speed is set according to Monitoring Data, temperature control mode and manual gear pattern can be set by button.
The present invention can carry out interval temperature control differentiation, and when can solve only according to a certain set value calculation motor start and stop, temperature fluctuates and causes the problem of motor frequent start-stop near this setting value; Foundation has rotational speed regulation model, makes warm air-conditioning save have something to base on.

Claims (5)

1. an infrared temp. control electric fan speed regulating method, is characterized in that, comprises the following steps:
S1. system initialization, sets desirable pmv value I pMV, thermal comfort index PMV upper limit threshold ε +with lower threshold ε -;
S2. controller is by human body infrared temperature sensing circuit, environment infrared temperature sensing circuit Real-Time Monitoring current human's temperature and ambient temperature;
S3. human body current thermal comfort index pmv value C is calculated according to surveyed current human's temperature value and ambient temperature value by thermal comfort index PMV simplified model pMV; And calculate described human body current thermal comfort index pmv value C pMVwith set desirable thermal comfort index pmv value I pMVdifference E pMV;
S4. to described difference E pMVcarry out the differentiation of temperature control threshold value, judge whether human thermal comfort index difference exceeds upper threshold, namely judges E pmv> ε +whether set up, if E pmv> ε +set up and then enter step S5, if be false, judge whether human thermal comfort index difference exceeds bottom threshold, namely judges E pmv≤ ε -whether set up, if E pmv≤ ε -set up and then enter step S8, otherwise forward step S2 to;
S5. thermal comfort index PMV regulated quantity is set a pMV =E pMV ;
S6. thermal comfort index PMV regulated quantity A pMVthe current fan motor rotational speed value S being target with human body optimum reelability quality is calculated by PMV rotating speed model 0, and calculate described tachometer value S 0account for maximum (top) speed value S maxpercentage η;
S7. percentage η is exported PWM waveform as PWM dutycycle σ, forward step S9 to;
S8. arrange PWM dutycycle σ=0, fan electromotor stall, forwards step S9 to;
S9. driver controls the break-make of power tube according to the PWM waveform that controller exports, thus controls fan electromotor revolution, realizes temperature regulate speed;
S10. judge whether shutdown, if do not shut down, forward step S2 to; If shutdown, terminates.
2. infrared temp. control electric fan speed regulating method according to claim 1, is characterized in that the rotating speed of PMV described in step S6 model is that pmv value and corresponding fan motor rotational speed value are formed by Function Mapping.
3. infrared temp. control electric fan speed regulating method according to claim 2, is characterized in that: the Function Mapping in the rotating speed of PMV described in step S6 model is radial base neural net Function Mapping.
4. infrared temp. control electric fan speed regulating method according to claim 3, is characterized in that: described radial base neural net Function Mapping refers to: be input as thermal comfort pmv value regulated quantity a pMV , export as motor rotations S 0, import radial base neural net function and train, obtain PMV rotating speed model as follows:
Wherein: ‖ a pMV - c i ‖ is input quantity a pMV with weights amount c i euclidean distance, w i for the weights between hidden layer to output layer.
5. infrared temp. control electric fan speed regulating method according to claim 1, is characterized in that: in described step S3, and human body current thermal comfort index pmv value is by following formulae discovery:
Wherein, wherein, t hfor infrared senor institute's human body temperature (DEG C), t efor infrared senor institute's testing environment temperature (DEG C).
CN201410759954.0A 2014-12-12 2014-12-12 A kind of infrared temp. control electric fan speed regulating method Expired - Fee Related CN104791282B (en)

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CN106499656A (en) * 2016-11-04 2017-03-15 安徽理工大学 A kind of fan wind speed intelligent control method
CN107701481A (en) * 2017-10-18 2018-02-16 珠海格力电器股份有限公司 Control method for fan, device and fan
CN108194398A (en) * 2017-12-29 2018-06-22 青岛海信医疗设备股份有限公司 Control method for fan and device
CN109654047A (en) * 2019-01-11 2019-04-19 陕西理工大学 A kind of control system and its control method of remote control fan
CN111043067A (en) * 2019-12-31 2020-04-21 宁波奥克斯电气股份有限公司 Fan control method, fan, smart home system and storage medium
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CN105952677A (en) * 2016-06-16 2016-09-21 安庆市银瑞商贸有限公司 Intelligent wind shifting system for household fan
CN105952677B (en) * 2016-06-16 2018-08-07 合肥市再德高分子材料有限公司 A kind of household fan intelligence change wind system
CN106499656A (en) * 2016-11-04 2017-03-15 安徽理工大学 A kind of fan wind speed intelligent control method
CN107701481A (en) * 2017-10-18 2018-02-16 珠海格力电器股份有限公司 Control method for fan, device and fan
CN108194398A (en) * 2017-12-29 2018-06-22 青岛海信医疗设备股份有限公司 Control method for fan and device
CN108194398B (en) * 2017-12-29 2019-09-20 青岛海信医疗设备股份有限公司 Control method for fan and device
CN109654047A (en) * 2019-01-11 2019-04-19 陕西理工大学 A kind of control system and its control method of remote control fan
CN111043067A (en) * 2019-12-31 2020-04-21 宁波奥克斯电气股份有限公司 Fan control method, fan, smart home system and storage medium
CN111043067B (en) * 2019-12-31 2022-07-15 宁波奥克斯电气股份有限公司 Fan control method, fan, smart home system and storage medium
CN113093839A (en) * 2021-02-24 2021-07-09 青岛理工大学 Multidimensional personalized thermal environment control method and system based on thermal sensation recognition

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