CN115373441A - Intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control method and system - Google Patents

Intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control method and system Download PDF

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CN115373441A
CN115373441A CN202210903312.8A CN202210903312A CN115373441A CN 115373441 A CN115373441 A CN 115373441A CN 202210903312 A CN202210903312 A CN 202210903312A CN 115373441 A CN115373441 A CN 115373441A
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cold
temperature
heating
proof clothes
proof
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CN115373441B (en
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刘艳峰
赵东雪
宋聪
王登甲
陈耀文
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Xian University of Architecture and Technology
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Abstract

The invention discloses a self-heating cold-proof clothes heat comfort control system with intelligent frequency conversion temperature control, which comprises an intelligent control device, and a data acquisition device, a heating device, a power supply device and a user interaction device which are respectively connected with the intelligent control device; the data acquisition device is used for acquiring external environment input parameters, acquiring temperature input parameters of the inner surface of the cold-proof clothes and transmitting environment information to the intelligent control device; the heating device is used for heating; the user interaction device is used for obtaining user data input parameters and transmitting the user data input parameters to the intelligent control device; the intelligent control device is used for carrying out frequency conversion control on the power of the heating device, so that the human body is always in a thermal comfortable temperature environment. The intelligent control device for the heat comfortable temperature of the cold-proof clothes provided by the invention makes up the situation that common clothes cannot meet the self-heating deficiency of human bodies under cold conditions, and greatly improves the efficiency and safety of outdoor workers under the environmental conditions such as high and cold climate and the like.

Description

Intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control method and system
Technical Field
The invention relates to the field of human body thermal comfort and temperature intelligent control, in particular to a self-heating cold-proof clothes thermal comfort control method and system with intelligent frequency conversion and temperature control.
Background
At present, people mainly rely on terminal heating equipment such as a radiator, an electrothermal film and the like in a building to heat all indoor areas in winter, and mainly rely on adding clothes to keep warm outdoors. However, frontier officers, border patrol personnel and outdoor equipment maintenance personnel need to carry out long-time field operation, are exposed to extreme cold environment conditions for a long time, are not enough in cold-resisting equipment, easily cause large burden to human bodies, seriously affect the health of the human bodies and even cause casualties. With the improvement of the quality of life of people, the heating of people is not limited to the forms, and the application of the cold protective clothing which can monitor the temperature of a microenvironment where a human body is located in real time and automatically adjust the temperature to enable the human body to be in a thermal comfort temperature range is more and more important. The provided spontaneous heating cold-proof clothing thermal comfort control system with intelligent frequency conversion temperature control makes up the situation of insufficient spontaneous heating of human bodies under cold conditions, is suitable for cold environment operators such as exploration personnel, high-altitude area circuit equipment overhaul workers, scientific investigation personnel and the like, and especially has important practical significance and application value for improving the safety and the operation efficiency of frontier officers and soldiers under the high-cold environment. In addition, the existing automatic heating clothes in the market all adopt a heating mode of a heating sheet or a heating wire, and the control method mainly comprises a manual power switch control mode, a simple threshold control mode and a manual key control temperature mode. Although the methods are low in cost, manual operation is needed, even when the external temperature changes greatly, the temperature of the heating clothes needs to be adjusted manually and frequently, the temperature of the heating clothes cannot be adjusted intelligently, the method is difficult to adapt to the temperature difference generated by the external temperature change, and meanwhile, the temperature change fluctuation is large, the automation degree is insufficient, and the experience feeling is insufficient.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control method and system, and solves the problems that the control method and system in the prior art need to manually and frequently adjust the temperature of a heating clothes when the external temperature changes greatly, cannot intelligently adjust the temperature of the heating clothes, are difficult to adapt to the temperature difference generated by the external temperature change, and simultaneously have large temperature change fluctuation, insufficient automation degree and insufficient experience feeling.
In order to solve the technical problems, the invention adopts the following technical scheme: an intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control system comprises an intelligent control device, and a data acquisition device, a heating device, a power supply device and a user interaction device which are respectively connected with the intelligent control device;
the data acquisition device is used for acquiring external environment input parameters and obtaining the input parameters of the temperature of the inner surface of the cold-proof coat, the external environment input parameters comprise air temperature, relative humidity, air flow rate, black ball temperature and atmospheric pressure, and the external environment input parameters and the input parameters of the temperature of the inner surface of the cold-proof coat are transmitted to the intelligent control device; the heating device is used for heating; the user interaction device is used for obtaining user data input parameters and transmitting the user data input parameters to the intelligent control device, and the user interaction device can also receive votes of users on current actual thermal senses and obtain current actual thermal sense voting value input parameters of the users; the power supply device is used for supplying power to the data acquisition device, the heating device and the user interaction device; the intelligent control device is used for obtaining the predicted thermal sensation voting value of the current user according to the received external environment input parameter, the temperature input parameter of the inner surface of the cold-proof coat and the user data input parameter, and carrying out variable frequency control on the power of the heating device, so that the human body is always in a thermal comfortable temperature environment.
The invention also has the following technical characteristics:
the data acquisition device comprises an environment temperature and humidity sensor, a wind speed sensor, a black ball temperature sensor, an atmospheric pressure sensor and a temperature sensor on the inner surface of the cold-proof clothes; the environment temperature and humidity sensor is used for obtaining air temperature, the air speed sensor is used for obtaining air flow rate, the black ball temperature sensor is used for obtaining black ball temperature, the atmospheric pressure sensor is used for obtaining atmospheric pressure, and the temperature sensor on the inner surface of the cold-proof clothes is used for obtaining the temperature of the inner surface of the cold-proof clothes at the position of the heating device. The heating device comprises a plurality of heaters and heating tubes connected to the heaters, and the heating tubes are used for conducting heat emitted by the heaters to exchange heat with a human body; the number of the temperature sensors on the inner surface of the cold-proof clothes corresponds to the number of the heaters.
A spontaneous heating cold-proof clothing comfortable control method of intelligent frequency conversion temperature control is carried out by adopting the spontaneous heating cold-proof clothing comfortable control system of the intelligent frequency conversion temperature control, and comprises the following steps:
step 1: acquiring an external environment input parameter and an inner surface temperature input parameter of the cold-proof coat through a data acquisition device; step 2: obtaining user data input parameters and the temperature of the inner surface of the cold-proof clothes of the heating area of the inner layer of the preset cold-proof clothes through a user interaction device; and step 3: calculating a current V-COMFA thermal sensation predicted value B through an intelligent control device; and 4, step 4: voting the current actual thermal sensation by the user through the user interaction device to obtain a current actual thermal sensation voting value input parameter of the user, and correcting the V-COMFA thermal sensation predicted value B obtained in the step 3 according to the current actual thermal sensation voting value input parameter of the user to obtain a system operation mode parameter BK; and 5: the intelligent control device changes the heating power of the heating device and changes the working mode of the cold-proof clothes according to the obtained system running mode parameter BK and the temperature input parameter of the inner surface of the cold-proof clothes, so that the human body is always in a hot and comfortable temperature environment.
Adjusting the initial base number of the duty ratio of the PID algorithm, acquiring the temperature of the inner surface of the cold-proof clothes in the heating area, dynamically adjusting the duty ratio of the input voltage of the heating device in a PID closed-loop control mode, and changing the heating power of the heating device; so that the human body is always in a hot and comfortable temperature environment.
The external environment input parameters comprise: air temperature T a (ii) a Relative Humidity (RH)
Figure BDA0003771694220000031
Black ball temperature T g (ii) a The atmospheric pressure P; air velocity V and inner surface temperature t of cold-proof clothes 1 、t 2 ……t n ；
Said useThe user data input parameters comprise a current human body activity amount corresponding parameter Ma; current total clothing thermal resistance r of human body co The temperature of the inner surface of the cold-proof clothes of the heating area of the inner layer of the preset cold-proof clothes comprises the following steps: presetting initial upper limit value t of temperature of inner surface of cold-proof clothes in heating area of inner layer of cold-proof clothes max And an initial lower limit value t min 。
The step 3 comprises the following steps:
step 3.1: according to the parameters Ma of human activity and air temperature T a Calculating the individual metabolic heat production quantity M, wherein the calculation formula is as follows:
M＝(0.85+0.0173e+0.0014T a )M a
wherein:
Figure BDA0003771694220000041
and Ma: parameter of human activity amount, W/m 2 ；T a : air temperature, deg.C; e: ambient air vapor pressure, kPa.
Step 3.2: according to total clothing thermal resistance r co Air velocity V and inner surface temperature t of cold-proof clothes n And calculating the heat flow loss C according to the following calculation relation:
Figure BDA0003771694220000042
wherein:
Figure BDA0003771694220000043
Figure BDA0003771694220000044
Figure BDA0003771694220000045
Figure BDA0003771694220000046
ρC p : volumetric heat capacity of air, J/m 3 ·K；T sk : skin surface temperature, deg.C; t is t n : the temperature of the inner surface of the cold-proof coat is at DEG C; r is a : boundary air resistance, s/m; p r : prandtl number, 0.71; v: air flow rate, m/s; k: thermal diffusivity of air, m 2 S; v: kinematic viscosity, m 2 And(s) in the presence of a catalyst. A, n: obtaining an empirical constant according to a cylinder heat flow experiment; r is a radical of hydrogen co : the total clothing thermal resistance is 3405.72s/m when the air flow rate is less than or equal to 0.7 m/s; r is c : the total clothing thermal resistance is s/m when the air flow rate is more than 0.7 m/s; v. of ac : moving speed, m/s.
Step 3.3: calculating long wave radiation L by the following formula:
L＝A eff εσ(T sf +273.15) 4
wherein:
Figure BDA0003771694220000051
T sf : garment surface temperature, deg.C; epsilon: emissivity of human skin and clothing; σ: stefan-Boltzmann constant, 5.67X 10 -8 W·m 2 /K 4 ；A eff : the effective radiation area coefficient of the body wearing the garment is 0.78.
Step 3.4: calculating to obtain the evaporation heat loss E, wherein the calculation formula is as follows:
E＝E s +E i
wherein: e s ＝0.42(M-58)，
Figure BDA0003771694220000052
r av ＝0.92r a ，q a ＝0.622×e(P-e)，q s ＝0.622e sk (P-e sk )，
Figure BDA0003771694220000053
E s : showing sweat evaporation amount, W/m 2 ；E i : no sweat evaporation, W/m 2 ；q a : air temperature T a Specific humidity of the following, kg/kg; q. q of s : skin temperature T sk Specific humidity of the following, kg/kg; ρ: air Density, 1.395kg/m 3 ；L v : latent heat of vaporization, kJ/kg; r is a radical of hydrogen av : boundary air evaporation thermal resistance, s/m; r is a radical of hydrogen cv : clothing evaporative thermal resistance, r cv ＝r c ；r tv : evaporation resistance of deep skin, s/m; p: atmospheric pressure, 101.325kPa.
Step 3.5: calculating the radiation absorbed by the body R RT The calculation formula is as follows:
Figure BDA0003771694220000054
wherein:
Figure BDA0003771694220000055
T rt : radiation temperature, deg.C; t is g : black ball temperature, deg.C.
Step 3.6: calculating the current human body thermal sensation pre-measurement Budget, wherein the calculation relationship is as follows:
Budget＝M-C-L-E+R RT
step 3.7: calculating a current human body thermal sensation predicted value B, wherein the calculation formula is as follows:
Figure BDA0003771694220000061
the step 4 comprises the following steps:
step 4.1: voting the current actual thermal sensation by the user through the user interaction device, acquiring the current actual thermal sensation voting value input parameter TSV of the user, and calculating the current correction parameter K of the prediction thermal sensation model n And the following conditions are satisfied between the current actual thermal sensing voting value input parameter TSV of the user and the prediction result B of the current V-COMFA prediction thermal sensing model:
Figure BDA0003771694220000062
wherein: k n -the correction parameters at the current nth vote (n =0,1,2,3 \ 8230;);
step 4.2: the intelligent control device calculates a thermal sensation predicted value correction parameter K, and the calculation formula of the correction parameter K is as follows:
Figure BDA0003771694220000063
step 4.3: after the user finishes the actual thermal sensation voting link, the intelligent control device obtains a correction value Budget of the human body thermal sensation prediction quantity by correcting the V-COMFA thermal sensation prediction model * The calculation formula is as follows:
Budget * ＝Budget+K
step 4.4: the intelligent control device predicts the correction value Budget through human body thermal sensation * Obtaining the system operation mode parameter B K The relationship is calculated as follows:
Figure BDA0003771694220000071
the total clothing thermal resistance r of the human body co Calculating the sum of the thermal resistances of the current clothes selected by the user through the user interaction device;
in the step 5, the intelligent control device judges the system operation mode parameter B K Determining whether the current heating device needs to change the working state: when B is present K Stopping heating when the temperature is more than or equal to 0; when B is present K If < 0, then: judging the temperature and t of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes min And t max The relationship of (1):
when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is less than t min When the clothes are used, the heating device in the inner layer heating area of the cold-proof clothes operates in a full-power mode; when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is more than or equal to t min Less than t max When the temperature is higher than the set temperature, the heating device of the heating area of the inner layer of the cold-proof coat operates in a variable frequency working mode; when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is more than or equal to t max The heating device of the heating area of the inner layer of the cold-proof clothes does not operate, so that the human body is always in a hot and comfortable temperature environment;
the intelligent control device controls the heating power of the heating device in a PID closed-loop control mode, and changes the heating power of the heating device by controlling the input voltage duty ratio of the input heating device, so as to realize a frequency conversion working mode. In the step 4, the intelligent control device corrects the output result of the PID closed-loop control through the thermal sensation predicted value correction parameter K to realize the control of the slope of the heating curve, so as to meet the requirement that the user can further change the heating speed of the cold-proof clothes according to the current thermal sensation, and the PID closed-loop control outputs the result PID OUT The correction calculation formula is as follows:
Figure BDA0003771694220000081
wherein: PID duty PID closed loop calculation output result before correction,%;
the utility model provides a spontaneous heating cold-proof clothing of intelligence frequency conversion accuse temperature, includes cold-proof clothing body, still includes the comfortable control system of spontaneous heating cold-proof clothing heat of foretell intelligence frequency conversion accuse temperature.
Compared with the prior art, the invention has the following technical effects:
the intelligent control device for the heat comfortable temperature of the cold-proof clothes provided by the invention makes up the situation that common clothes cannot meet the insufficient self-heating of a human body under a cold condition, greatly improves the efficiency and safety of outdoor workers under the environmental conditions of high and cold climate and the like, and meets higher requirements of frontier officers and soldiers.
The method can call a V-COMFA predictive heat sensation model to obtain a predictive heat sensation voting value of the current user according to the external environment input parameter information of the environment where the current user is located and the temperature input parameter of the inner surface of the cold-proof clothes of key parts of the user in the use process of the cold-proof clothes, changes the heating mode of the heating device by combining the user data input parameter set by the user according to the wearing condition and the current actual heat sensation voting value input parameter of the user, realizes the automatic frequency conversion control of the temperature of the heating device of the cold-proof clothes by a PID closed-loop control mode, adopts the capillary tube to accelerate the heat exchange efficiency in the cold-proof clothes, keeps the human body in a heat and comfortable temperature environment all the time, and meets the heat and comfortable requirements of the user wearing the cold-proof clothes.
Drawings
FIG. 1 is a flow chart of parameter calculation of a thermal comfort control method for a self-heating cold-proof garment provided by the invention;
FIG. 2 is a schematic diagram illustrating the principle of the self-heating thermal comfort control system of the cold-proof garment of the present invention;
FIG. 3 is a front structural view of the thermal comfort control system of the self-heating cold-proof clothes provided by the present invention;
FIG. 4 is a back composition structure diagram of the thermal comfort control system of the self-heating cold-proof suit provided by the present invention;
FIG. 5 is a schematic view of a voting scale of a user interaction device provided in accordance with the present invention;
the various reference numbers in the figures have the meaning:
1-cold-proof clothes body, 2-capillary tube, 3-mobile power supply, 4-first zipper type special pocket, 5-wind speed sensor, 6-environment temperature and humidity sensor, 7-cold-proof clothes inner surface temperature sensor, 8-carbon fiber flexible heating sheet, 9-integrated circuit board, 10-second zipper type special pocket, 11-self-locking key switch, 12-black ball temperature sensor and 13-atmospheric pressure sensor;
the present invention will be explained in further detail with reference to examples.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
As used herein, the terms "upper," "lower," "front," "back," "top," "bottom," and the like are used merely to facilitate describing the invention and to simplify the description, and do not indicate or imply that the device or element so referred to must be oriented, constructed or operated in a specific manner, "inner" and "outer" refer to the inner and outer of the contours of the corresponding part and are not to be construed as limiting the invention.
In the present invention, the terms "mounted", "connected", "fixed", and the like are used broadly and may be, for example, fixedly connected, detachably connected, or integrated without being described to the contrary; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
All components in the present invention, unless otherwise specified, are all as known in the art.
Example 1:
according to the technical scheme, as shown in fig. 1 to 5, the intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control system comprises an intelligent control device, and a data acquisition device, a heating device, a power supply device and a user interaction device which are respectively connected with the intelligent control device;
the data acquisition device is used for acquiring external environment input parameters and obtaining internal surface temperature input parameters of the cold-proof clothes, the external environment input parameters comprise air temperature, relative humidity, air flow rate, black ball temperature and atmospheric pressure, and the external environment input parameters and the internal surface temperature input parameters of the cold-proof clothes are transmitted to the intelligent control device; the heating device is used for heating; the user interaction device is used for obtaining user data input parameters and transmitting the user data input parameters to the intelligent control device, and the user interaction device can also receive votes of users on current actual thermal senses and obtain current actual thermal sense voting value input parameters of the users; the intelligent control device is used for obtaining a predicted thermal sensation voting value of a current user according to the received external environment input parameter, the received cold-proof clothes inner surface temperature input parameter and the received user data input parameter, and carrying out variable frequency control on the power of the heating device, so that the human body is always in a thermal comfortable temperature environment.
As a preference of this embodiment: the data acquisition device comprises an environment temperature and humidity sensor, a wind speed sensor, a black ball temperature sensor, an atmospheric pressure sensor and a temperature sensor on the inner surface of the cold-proof coat;
the environment temperature and humidity sensor is used for obtaining air temperature, the air speed sensor is used for obtaining air flow rate, the black ball temperature sensor is used for obtaining black ball temperature, the atmospheric pressure sensor is used for obtaining atmospheric pressure, and the temperature sensor on the inner surface of the cold-proof clothes is used for obtaining the temperature of the inner surface of the cold-proof clothes at the position of the heating device.
As a preference of this embodiment: the heating device comprises a plurality of heaters and heating tubes connected to the heaters, and the heating tubes are used for conducting heat emitted by the heaters to exchange heat with a human body; the heating device comprises carbon fiber flexible heating sheets and capillary tubes, wherein the carbon fiber flexible heating sheets and the capillary tubes are arranged at the key positions of the chest, the abdomen, the back and the waist 4 of the human body on the inner layer of the cold-proof coat, and the capillary tubes which are in a ring shape and filled with media are uniformly attached to the inner layer of the cold-proof coat and are used for conducting heat emitted by the carbon fiber flexible heating sheets to exchange heat with the human body;
the number of the temperature sensors on the inner surface of the cold-proof clothes corresponds to the number of the heaters.
The user can give the current actual thermal sensing vote value input parameter of the user through the user interaction device to correct the predicted thermal sensing vote value of the V-COMFA, and the intelligent control device corrects the predicted thermal sensing vote value according to the system operation mode parameter B K Changing the heating mode of the heating device to meet the requirementsThe heat comfort requirement of the cold-proof clothes keeps the human body in the temperature range of the heat comfort environment, and the working efficiency and the safety of the heat-comfort environment are improved to a great extent.
The intelligent control device performs frequency conversion control on the power of the heating device in the using process of the cold-proof suit, calls a V-COMFA predicted thermal sensing model to obtain a predicted thermal sensing voting value of the current user according to received parameters and information, corrects the predicted thermal sensing voting value of the current user according to the current actual thermal sensing voting value input parameters of the user given by the user, and changes the heating mode of the heating device.
The power supply device comprises a mobile power supply and a self-locking key switch, is arranged in a special pocket outside the cold-proof clothes, is used for a power supply of a heat comfort control system of the cold-proof clothes, and can be charged and replaced;
the V-COMFA predicted heat sensation model is
Budget＝M-C-L-E+R RT
Wherein: and (4) Budget: human body heat sensation quantity, W/m 2 (ii) a M: individual metabolic thermogenesis, W/m 2 ；R RT : radiation absorbed by the human body, W/m 2 (ii) a C: convective heat loss, W/m 2 (ii) a E: heat loss by evaporation, W/m 2 (ii) a L: long wave radiation, W/m 2 ；
The individual metabolic thermogenesis M is calculated by the formula:
M＝(0.85+0.0173e+0.0014T a )M a
wherein:
Figure BDA0003771694220000111
and Ma: parameter of human activity amount, W/m 2 Looking up a table to obtain; t is a : air temperature, deg.C; e: ambient air vapor pressure, kPa.
The calculation relationship of the heat flow loss C is as follows:
Figure BDA0003771694220000112
wherein:
Figure BDA0003771694220000121
Figure BDA0003771694220000122
Figure BDA0003771694220000123
Figure BDA0003771694220000124
ρC p : volumetric heat capacity of air, 1212J/m 3 ·K；T sk : skin surface temperature, deg.C; r is a : boundary air resistance, s/m; p is r : prandtl number, 0.71; v: air flow rate, m/s; k: thermal diffusivity of air, 22X 10 -6 m 2 S; v: kinematic viscosity, m 2 S; a, n: empirical constants derived from cylinder heat flow experiments: when Re < 4000, a =0.683, n =0.466; when 4000 < Re < 40000, A =0.193, n =0.618; when Re > 40000, a =0.0266, n =0.805.r is a radical of hydrogen co : the total clothing thermal resistance (the air flow rate is less than or equal to 0.7 m/s) and s/m are obtained by looking up a table; r is c : total clothing thermal resistance (air flow rate is more than 0.7 m/s), s/m; v. of ac : moving speed, m/s.
The calculation relationship of the long wave radiation L is as follows:
L＝A eff εσ(T sf +273.15) 4
wherein:
Figure BDA0003771694220000125
T sf : the surface temperature of the garment, DEG C; epsilon: human skin and clothingEmissivity of 0.95; σ: stefan-Boltzmann constant, 5.67X 10 -8 W·m 2 /K 4 ；A eff : the effective radiation area coefficient of the human body is 0.78 for walking and running, and the riding coefficient is 0.70.
The calculation relationship of the evaporation heat loss E is as follows: e = E s +E i
Wherein: e s ＝0.42(M-58)，
Figure BDA0003771694220000131
r av ＝0.92r a ，q a ＝0.622×e(P-e)，q s ＝0.622e sk (P-e sk )，
Figure BDA0003771694220000132
E s : showing sweat evaporation amount, W/m 2 ；E i : no sweat evaporation, W/m 2 ；q s : skin temperature T sk Specific humidity, kg/kg; q. q of a : air temperature T a Specific humidity of the following; ρ: air Density, kg/m 3 ；L v : latent heat of vaporization, kJ/kg; r is av : boundary air evaporation thermal resistance, s/m; r is cv : clothing evaporative thermal resistance, r cv ＝r c ；r tv : resistance to deep skin evaporation, 7.7X 10 3 s/m; p: atmospheric pressure, kPa.
Radiation R absorbed by the human body RT The calculation formula is as follows:
Figure BDA0003771694220000133
wherein:
Figure BDA0003771694220000134
T rt : radiation temperature, deg.C; t is g : black ball temperature, deg.C.
A calculation formula of a human body thermal sensation predicted value B is as follows:
Figure BDA0003771694220000135
further, the total clothing thermal resistance r of the human body co Calculating a parameter r corresponding to the current clothing thermal resistance (coat) selected by the user through the user interaction device 1 Parameter r corresponding to current thermal resistance of clothes (lower clothes) 2 Parameter r corresponding to current clothing thermal resistance (socks) 3 Parameter r corresponding to current clothing thermal resistance (shoes) 4 And the thermal resistance parameter r of the clothing fixed by the cold-proof clothing 5 The calculation formula is as follows:
r co ＝r 1 +r 2 +r 3 +r 4 +r 5
furthermore, when the user uses the cold-proof clothes, the corresponding parameter M of the current human body metabolic rate a After the user selects the activity state option in the user interaction device, the activity state-metabolic rate conversion table is obtained through the activity state-metabolic rate conversion table built in the user interaction device;
furthermore, when the user uses the cold-proof clothes, the parameter r corresponding to the current thermal resistance of the clothes 1 、r 2 、r 3 、r 4 And r 5 After a user selects a clothing thermal resistance option in the user interaction device, the clothing thermal resistance option is obtained through a common clothing-thermal resistance parameter conversion table built in the user interaction device;
example 2:
the embodiment provides an intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control method, which comprises the following steps:
step 1: obtaining the air temperature t of the environment temperature and humidity sensor a (ii) a Obtaining the black ball temperature t of the black ball temperature sensor g (ii) a Acquiring the air flow velocity V of the air velocity sensor; obtaining the atmospheric pressure P of the atmospheric pressure sensor, and obtaining the temperature t of the inner surface of the cold-proof clothes corresponding to the heating areas of the important parts of the chest, the abdomen, the back and the waist 4 of the human body 1 、t 2 、t 3 And t 4 ；
And 2, step: obtaining a userThe current human body metabolic rate corresponding parameter M selected by the user interaction device a (ii) a Obtaining a parameter r corresponding to the clothing thermal resistance selected by the user through the user interaction device 1 、r 2 、r 3 、r 4 And r 5 Totally 2.81clo, and obtaining the current total clothing thermal resistance r of the human body through conversion co Is 3405.72s/m; presetting initial upper limit value t of temperature of inner surface of cold-proof clothes in inner heating area of cold-proof clothes max At 35 ℃; presetting an initial lower limit value t of the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes min Is 15 ℃;
and step 3: calculating a current V-COMFA thermal sensation predicted value;
step 3.1: according to the parameters Ma of human activity and air temperature T a Calculating the individual metabolic heat production quantity M, wherein the calculation formula is as follows:
M＝(0.85+0.0173e+0.0014T a )M a
wherein:
Figure BDA0003771694220000141
and Ma: physical activity parameter, 120W/m 2 ；T a : air temperature, -20 ℃;
Figure BDA0003771694220000151
relative humidity, 20%; e: ambient air vapor pressure, kPa.
And obtaining a calculation result: e =0.024,m =98.69.
Step 3.2: according to total clothing thermal resistance r co Air velocity V and inner surface temperature t of cold-proof clothes n And calculating the heat flow loss C according to the following calculation relation:
Figure BDA0003771694220000152
wherein:
Figure BDA0003771694220000153
Figure BDA0003771694220000154
Figure BDA0003771694220000155
Figure BDA0003771694220000156
ρC p : volumetric heat capacity of air, 1212J/m 3 ·K；T sk : skin surface temperature, deg.C; t is t n : the temperature of the inner surface of the cold-proof clothes (taking the measurement result of the temperature sensor of the inner surface of the cold-proof clothes at the chest position as an example) is 21.8 ℃; r is a radical of hydrogen a : boundary air resistance, s/m; p r : prandtl number, 0.71; v: air flow rate, 2m/s; k: thermal diffusivity of air, 22X 10 -6 m 2 S; u: kinematic viscosity, 1.5X 10 -5 m 2 And s. A, n: according to calculations, re =22667, so a =0.193, n =0.618; r is a radical of hydrogen co : the total clothing thermal resistance (the air flow rate is less than or equal to 0.7 m/s) and is 3405.72s/m; r is c : total clothing thermal resistance (air flow rate is more than 0.7 m/s), s/m; v. of ac : moving speed, 0.5m/s.
And obtaining a calculation result: c =22.27,t sk ＝32.67，r a ＝91.18，Re＝22667，r c ＝2774.8。
Step 3.3: calculating long wave radiation L by the following formula:
L＝A eff εσ(T sf +273.15) 4
wherein:
Figure BDA0003771694220000161
T sf : the surface temperature of the garment, DEG C; epsilon: human beingEmissivity of body skin and clothing, 0.95; σ: stefan-Boltzmann constant, 5.67X 10 -8 W·m 2 /K 4 ；A eff : the effective radiation area coefficient of the body wearing the garment is 0.78.
And obtaining a calculation result: l =177.16,t sk ＝-18.32。
Step 3.4: calculating to obtain the evaporation heat loss E, wherein the calculation formula is as follows:
E＝E s +E i
wherein: e s ＝0.42(M-58)，
Figure BDA0003771694220000162
r av ＝0.92r a ，q a ＝0.622×e(P-e)，q s ＝0.622e sk (P-e sk )，
Figure BDA0003771694220000163
E s : showing sweat evaporation amount, W/m 2 ；E i : no sweat evaporation, W/m 2 ；q a : air temperature T a Specific humidity of the following, kg/kg; q. q.s s : skin temperature T sk Specific humidity, kg/kg; ρ: air Density of 1.395kg/m 3 ；L v : latent heat of vaporization, 2442kJ/kg; r is a radical of hydrogen av : boundary air evaporation thermal resistance, s/m; r is cv : clothing evaporative thermal resistance, r cv ＝r c ；r tv : resistance to deep skin evaporation, 7.7X 10 3 s/m; p: atmospheric pressure, 101.325kPa.
And obtaining a calculation result: e =36.4431,E s ＝17.09，E i ＝19.35，r av ＝83.89，q a ＝1.59，q s ＝61.55，e sk ＝0.98。
Step 3.5: calculating the radiation absorbed by the body R RT The calculation formula is as follows:
Figure BDA0003771694220000164
wherein:
Figure BDA0003771694220000165
T rt : radiation temperature, deg.C; t is g : black bulb temperature, -17.3 ℃.
And obtaining a calculation result: r RT ＝159.72，T rt ＝-7.98。
Step 3.6: calculating the current human body thermal sensation pre-measurement Budget, wherein the calculation relationship is as follows:
Budget＝M-C-L-E+R RT
and (3) obtaining a prediction result of the V-COMFA prediction heat sensation model according to calculation:
Budget＝22.53。
step 3.7: calculating a current human body thermal sensation predicted value B by the following formula:
Figure BDA0003771694220000171
according to calculation, taking the measurement result of the temperature sensor on the inner surface of the cold-proof clothes at the chest position as an example, the human body thermal sensation prediction value of the part is predicted by a V-COMFA prediction thermal sensation model: b =0, and it is determined that the sensation of heat in the chest portion is moderate at this time, and therefore, auxiliary heating is not required.
And 4, step 4: voting the current actual thermal sensation by the user through the user interaction device to obtain a current actual thermal sensation voting value input parameter of the user, and correcting the V-COMFA thermal sensation predicted value B obtained in the step 3 according to the current actual thermal sensation voting value input parameter of the user to obtain a system operation mode parameter BK;
step 4.1: voting the current actual thermal sensation by the user through the user interaction device, acquiring the current actual thermal sensation voting value of the user, setting the TSV as 0, and calculating the current correction parameter K of the prediction thermal sensation model n The current actual thermal sensation voting value input parameter TSV of the user and the prediction result B of the current V-COMFA prediction thermal sensation model satisfy the conditions asThe following conditions:
Figure BDA0003771694220000172
wherein: k is n -correction parameters at the current nth vote (n =1,2,3 \ 8230;);
specifically, when the user performs the actual thermal sensing voting through the user interaction device, the current actual thermal sensing voting value input parameter TSV of the user can be obtained, the voting scale is as shown in fig. 5, the voting scale uses an ASHRAE 7-point scale, and the current actual thermal sensing voting value input parameter TSV of the user includes seven types, namely-3, -2, -1, 0,1,2, and 3, which respectively represent: -3 is cold; -2 is cool; -1 is slightly cool; 0 is moderate; 1 is slightly warm; 2 is warm, 3 is hot, and the user selects any one of-3, -2, -1, 0,1,2 and 3 according to the actual experience.
Specifically, the present embodiment sets the voting number n =3, and prompts the user to feed back the actual thermal sensation information at 0 minute, 20 minutes and 40 minutes when the thermal comfort control system of the cold-proof clothes starts to work.
Step 4.2: the intelligent control device calculates a thermal sensation predicted value correction parameter K, and the calculation formula of the correction parameter K is as follows:
Figure BDA0003771694220000181
step 4.3: after the user finishes the actual thermal sensation voting link, the intelligent control device obtains the correction value Budget of the human body thermal sensation prediction quantity by correcting the V-COMFA thermal sensation prediction model * The calculation formula is as follows:
Budget * ＝Budget+K
step 4.4: the intelligent control device predicts the correction value Budget through human body thermal sensation * Obtaining the system operation mode parameter B K The relationship is calculated as follows:
Figure BDA0003771694220000182
and 5: the intelligent control device obtains the system operation mode parameter B K Adjusting the initial base number of the duty ratio of the PID algorithm, acquiring the temperature of the inner surface of the cold-proof clothes in the heating area, dynamically adjusting the duty ratio of the input voltage of the heating device in a PID closed-loop control mode, and changing the heating power of the heating device; so that the human body is always in a hot and comfortable temperature environment.
In the step 5, the intelligent control device judges the system operation mode parameter B K Determining whether the current heating device needs to change the working state: when B is present K Stopping heating when the temperature is more than or equal to 0; when B is present K If < 0, then: judging the temperature of the inner surface of the cold-proof clothes and t min And t max The relationship of (1):
when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is less than t min When the heat-insulating clothes are used, the heating device of the heating area of the inner layer of the cold-proof clothes operates in a full-power mode;
when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is more than or equal to t min Less than t max When the temperature is higher than the set temperature, the heating device of the heating area of the inner layer of the cold-proof coat operates in a variable frequency working mode;
when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is more than or equal to t max The heating device of the heating area of the inner layer of the cold-proof clothes does not operate, so that the human body is always in a hot and comfortable temperature environment;
specifically, the intelligent control device calculates the system operation mode parameter B K And obtaining the temperature t of the inner surface of the cold-proof clothes in the heating area 1 、t 2 、t 3 And t 4 Changing the working mode of the cold-proof clothes, and calculating the upper limit value t of the temperature of the inner surface of the cold-proof clothes in the heating area max The intelligent control device controls the duty ratio of the input voltage of the heating device through a PID closed loop to change the heating power of the heating device at t max When the difference value is larger, the temperature rising speed of the heating device is increased; at and t max When the difference is smallThe temperature rise speed of the heating device is reduced, and the purpose of smoothing a temperature curve and reducing the steady-state error of temperature control is achieved.
Specifically, when the intelligent control device controls the power of the heating device through a PID closed loop, the intelligent control device operates as follows: when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is less than t min When the heat-insulating clothes are used, the heating device of the heating area of the inner layer of the cold-proof clothes operates in a full-power mode; when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is more than or equal to t min Less than t max When the temperature is higher than the set temperature, the heating device of the heating area of the inner layer of the cold-proof coat operates in a variable frequency working mode; when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is more than or equal to t max The heating device of the heating area of the inner layer of the cold-proof clothes does not operate, so that the human body is always in a hot and comfortable temperature environment; when the temperature t of the inner surface of the cold-proof clothes in the heating area of the inner layer of a certain cold-proof clothes 1 /t 2 /t 3 /t 4 ＜t min When the heat-insulating clothes are used, the heating device of the heating area of the inner layer of the cold-proof clothes operates in a full-power mode; when the temperature t of the inner surface of the cold-proof clothes in the heating area of the inner layer of a certain cold-proof clothes min ≤t 1 /t 2 /t 3 /t 4 ≤t max When the temperature is higher than the set temperature, the heating device in the heating area of the inner layer of the cold-proof clothes operates in a frequency conversion working mode at t max When the difference value is larger, the temperature rising speed of the heating device is increased; at and t max When the difference is smaller, the heating speed of the heating device is reduced, so that the internal environment temperature of the cold-proof clothes is continuously close to the thermal comfort temperature in a stable trend. Specifically, the method comprises the following steps: the intelligent control device corrects the output result of PID closed-loop control through the thermal sensation predicted value correction parameter K, realizes the control of the slope of the heating curve, meets the requirement that a user uses the cold-proof clothes to further change the heating speed of the cold-proof clothes according to the current thermal sensation, and outputs the result PID closed-loop control OUT The correction calculation formula is as follows:
Figure BDA0003771694220000201
wherein: PID duty And calculating an output result by the PID closed loop before correction.
Specifically, the duty ratio PWM of the input voltage of the heat generating device at the present time OUT The calculation formula of (c) is as follows:
Figure BDA0003771694220000202
specifically, the core algorithm for the PID closed-loop control of the PWM waveform duty ratio is as follows:
PWM OUT ＝K P ×(TV-PV t )+[K I (TV-PV t )+MX]+[K D (PV t-1 -PV t )]
wherein, K P : a proportional part for adjusting the response time of the system by changing the input deviation coefficient; k I : the integral part is used for carrying out integral operation on the input deviation and eliminating the steady-state error of the system; k is D : a differential part for performing differential operation on the input deviation and reducing overshoot and dynamic deviation of the system; the TV: PID calculates a set temperature target value; PV t : the actual temperature variable value of the system in the process of the tth sampling time; PV t-1 : the actual temperature variable value of the system in the process at the t-1 sampling moment; MX: integrating and summing the temperature deviations; the temperature deviation value is the value obtained by subtracting the temperature variable value in the sampling process from the set temperature target value.
Specifically, the cold-proof clothing thermal comfort system obtains PWM waveform duty ratio control parameters after PID closed-loop operation, outputs 4 paths of PWM control signals by configuring a microprocessor timer function, increases the minimum temperature amplitude limit to the PID operation result according to the actual condition, and controls the carbon fiber flexible heating sheet to heat up with the maximum power when the temperature of the inner surface of the cold-proof clothing of each local area of the inner layer of the cold-proof clothing is less than the set minimum temperature amplitude limit.
The embodiment presets the initial upper limit value t of the inner surface temperature of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes max =32 ℃, and the initial lower limit value t of the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is preset min =18 ℃. Duty ratio of input voltage of heat generating deviceRatio coefficient PWM OUT The calculation result of (2) is 0.
Specifically, the temperature rise speed of the heating device inside the cold-proof clothes is analyzed. The relation between the power change of the carbon fiber flexible heating sheet of the heating device in the cold-proof clothes and the heat comfortable temperature difference of the human body can be analyzed to theoretically determine the temperature rise speed change condition of the inner surface of the cold-proof clothes in each local area of the inner layer of the cold-proof clothes, and the relation between the inner surface temperature of the cold-proof clothes in each local area of the inner layer of the cold-proof clothes and the power of the carbon fiber flexible heating sheet can be obtained. The heating power of the carbon fiber flexible heating sheet is controlled, so that the temperature rise speed inside the cold-proof clothes can be adjusted.
The cold-proof clothes can call a V-COMFA predictive thermal sensing model to obtain a predictive thermal sensing voting value of a current user according to parameter information of the environment where the current user is located and input parameters of the temperature of the inner surface of the cold-proof clothes at key parts of the user in the using process, change the heating mode of the heating device by combining the input parameters of user data and the input parameters of the current actual thermal sensing voting value of the user, and realize automatic frequency conversion control of the temperature of the heating device of the cold-proof clothes in a PID closed-loop control mode.
The intelligent control device can call a V-COMFA predictive thermal sensation model to obtain a predictive thermal sensation voting value of a current user according to parameter information of the environment where the current user is located and input parameters of the temperature of the inner surface of the cold-proof clothes of key parts of the user, changes a heating mode of the heating device by combining the input parameters of user data and the input parameters of the current actual thermal sensation voting value of the user, realizes automatic frequency conversion control on the temperature of the heating device of the cold-proof clothes in a PID (proportion integration differentiation) closed-loop control mode, outputs PWM (pulse width modulation) control signals with different frequencies, amplifies the input voltage of the heating device through an isolation circuit, and modulates the duty ratio of the input voltage, so that the input voltage is converted into power for controlling the carbon fiber flexible heating sheet of the heating device, and the purpose of controlling the temperature rising speed of the carbon fiber flexible heating sheet is achieved. When the difference value between the inner surface temperature of the cold-proof clothes on the inner layer of the cold-proof clothes in the chest, abdomen, back and waist local areas of the human body and the heat comfort temperature of 4 corresponding areas set by the system is larger, the PWM signal frequency is higher, and the temperature rise speed of the carbon fiber flexible heating sheet is higherBut there is a maximum heating power limit; when the difference between the inner surface temperature of the cold-proof clothes in each local area of the inner layer of the cold-proof clothes and the corresponding thermal comfort temperature set by the system is smaller, the lower the PWM signal frequency is, and the lower the heating speed of the carbon fiber flexible heating sheet is. And calculating to obtain system operation mode parameter B according to user current actual heat sensation voting value input parameter K When B is present K When the temperature is more than or equal to 0, the heating device of the cold-proof clothes stops heating; when B is present K When the frequency is less than 0, the heating device of the cold-proof clothes continues to carry out variable frequency heating.
Specifically, in practical use of the cold-proof garment in an alpine outdoor environment, the heat generating device generally has the following 4 operating modes (in a specific embodiment, the heat generating device is the carbon fiber flexible heat generating sheet 8):
1)B K the temperature is more than or equal to 0, and the human body is in an environment with self-heating condition meeting thermal comfort temperature; at this time, t 1 /t 2 /t 3 /t 4 ≥t max The carbon fiber flexible heating sheet 8 does not need auxiliary heating, and the power supply of the carbon fiber flexible heating sheet 8 is in a disconnected state;
2)B K if the temperature is less than 0, the current heat sensation voting value of the user feeds back that the human body is in the environment with spontaneous heating condition which does not meet the heat comfortable temperature; at the moment, the temperature of the area where the carbon fiber flexible heating sheet 8 is located is more than or equal to t max The carbon fiber flexible heating sheet 8 does not need auxiliary heating, and the power supply is in a disconnected state;
3)B K if the temperature is less than 0, the human body is in an environment with insufficient spontaneous heating condition, but the environment meets the thermal comfort temperature after the auxiliary heating of the cold-proof clothes; at this time, t min ≤t 1 /t 2 /t 3 /t 4 ≤t max The carbon fiber flexible heating sheet 8 needs to be assisted to heat, a power supply of the carbon fiber flexible heating sheet 8 is in a conducting state, and the intelligent control device needs to continuously carry out automatic frequency conversion control on the heating power of the heating device in the cold-proof clothes;
4)B K less than 0, the human body is in the environment which still does not meet the thermal comfort temperature after self-heating and the auxiliary heating of the cold-proof clothes; at this time, t 1 /t 2 /t 3 /t 4 ＜t min What is, what isThe carbon fiber flexible heating sheet 8 needs to be heated in an auxiliary mode, and a power supply of the carbon fiber flexible heating sheet 8 is in a conducting state and heats in a maximum power mode;
specifically, the intelligent control device controls both the heating device requiring automatic frequency conversion control and the heating device requiring the maximum power mode, and when controlling the same set of heating devices, the intelligent control device can intelligently switch the 4 operating modes.
Specifically, in the using process of the cold-proof coat, B exists after the actual heat sensation voting stage of the user is finished K The current heat sensation voting value of the user feeds back the situation that the self-heating situation of the human body meets the heat comfortable temperature environment, but the actual heat sensation value of the user is less than 0 or t 1 /t 2 /t 3 /t 4 ＜t min Or t min ≤t 1 /t 2 /t 3 /t 4 ≤t max The user can set the upper limit value t of the inner surface temperature of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes through the user interaction device according to the actual thermal sensation condition of the user max And a lower limit value t min And (6) adjusting.
Specifically, in the using process of the cold-proof coat, B exists after the actual heat sensation voting stage of the user is finished K <0, the current heat sensation voting value of the user feeds back the situation that the human body is in the self-heating situation and does not meet the heat comfortable temperature environment, but the actual heat sensation value of the user is more than or equal to 0 or t 1 /t 2 /t 3 /t 4 ＞t max The user can set the preset upper limit value t of the inner surface temperature of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes through the user interaction device according to the actual thermal sensing condition of the user max And a lower limit value t min And (6) adjusting.
Example 3:
the structure of the cold-proof clothes of this embodiment will be described with reference to fig. 3 to 4:
the cold-proof clothing heat comfort control system comprises a cold-proof clothing body 1, wherein a first zipper type special pocket 4 is arranged on the outer side surface of the cold-proof clothing body 1 and used for placing the power supply device, and in a specific embodiment, the power supply device is a mobile power supply 3.
The outer side surface of the cold-proof clothes body 1 is provided with a second zipper type special pocket 10 for placing the intelligent control device, and in a specific embodiment, the intelligent control device is an integrated circuit board 9.
The mobile power supply 3 is connected with the integrated circuit board 9 through an A-type USB data line, and can be replaced or charged through a USB interface as a power supply of the cold-proof clothes heat comfortable control system.
The integrated circuit board 9 is further provided with a self-locking key switch 11 for controlling the on-off of the power supply of the cold-proof clothing heat comfort control system.
The heating device is arranged at 4 positions on the inner side surface of the cold-proof clothes body 1, in a specific embodiment, the heating device comprises a carbon fiber flexible heating sheet 8 and a capillary tube 2, wherein the carbon fiber flexible heating sheet 8 is tightly attached to the capillary tube 2, and the capillary tube 2 is arranged in a circular ring shape and used for accelerating the heat exchange efficiency of the carbon fiber flexible heating sheet and a human body.
Environment temperature and humidity sensor 6 locates the right-hand lower hem department in outside surface of cold-proof clothing body 1, wind speed sensor 5 locate the right-hand lower hem department in outside surface of cold-proof clothing body 1, black ball temperature sensor 12 locates the lower hem department in outside surface left of cold-proof clothing body 1, atmospheric pressure sensor 13 locates the lower hem department in outside surface left of cold-proof clothing body 1, cold-proof clothing internal surface temperature sensor 7 locates in the inboard surface heating device scope of cold-proof clothing body 1, and the mounted position keeps away from with this regional flexible heating device carbon fiber piece that generates heat.
Specifically, the capillary tube 2 is the same as a capillary tube of a human body, the liquid flow speeds of the capillary tube and the capillary tube are basically the same, and meanwhile, the capillary tube has the advantages of being thin in wall, good in heat conductivity, uniform in heat exchange and the like, the requirement of heat transfer exchange between the capillary tube and the human body can be well met, and the heat exchange efficiency between the carbon fiber flexible heating sheet 8 and the human body is improved.
Specifically, the integrated circuit board 9 includes a control unit, a bluetooth module unit, an isolation circuit unit, a connector unit, and a voltage regulator circuit unit. The control unit is a minimum system which is composed of a microprocessor, a reset circuit, an external passive crystal oscillator, a 3.3V voltage stabilizing circuit, a plurality of resistors and a plurality of capacitors as cores.
The microprocessor is internally provided with a V-COMFA predictive thermal sensing algorithm processing program module, a data acquisition and filtering program module, a Bluetooth communication program module, a PID closed-loop control program module and a timer PWM control signal pulse width modulation program module.
The isolation circuit unit is a 4-channel power amplification unit consisting of 1 4-channel high-speed optical coupling isolation chip, 4 NPN triodes, 4P-channel MOSFETs, a plurality of resistors and a plurality of capacitors, and is used for circuit isolation and power amplification between the control unit and 4 groups of heating devices, and transmitting a control signal of the intelligent control device to carry out pulse width modulation on the input voltage of the heating devices.
The mobile power supply 3 provides a 12V power supply for the integrated circuit board 9 of the intelligent control device, a 12V power line is connected with the input end of the self-locking key switch 11 firstly, then the output end of the self-locking key switch 11 is respectively connected with the input end of the 5V voltage stabilizing circuit of the integrated circuit board 9 and the S poles of the 4P-channel MOSFETs of the power amplifying circuit in parallel, and the ground wire of the mobile power supply 15 and the ground wire of the 3.3V voltage stabilizing circuit of the control unit are processed in a common ground mode.
Specifically, the 5V voltage regulator circuit of the integrated circuit board 9 is used for performing voltage drop processing on the 12V voltage of the mobile power supply 3, and then the voltage drop processed is used as a power supply of the data acquisition device of the cold-proof clothing heat comfort control system and a 3.3V voltage regulator circuit power supply of the intelligent control device.
Specifically, after power lines of the sensors of the data acquisition device are in butt joint with the output end of a 5V voltage-stabilized power supply of the control unit, the data transmission lines are respectively connected with the microprocessor.
Specifically, the power line of the bluetooth module included in the integrated circuit board 9 is connected to the output end of the 3.3V voltage-stabilized power supply of the control unit, and is connected to the microprocessor in a serial communication manner, the TX data output port of the bluetooth module is connected to the RX data input port of the microprocessor, and the RX data input port of the bluetooth module is connected to the TX data output port of the microprocessor.
Specifically, 4 heating devices are arranged on the inner side surface of the cold-proof clothes body 1, in a specific embodiment, the heating devices are carbon fiber flexible heating sheets 8, and power lines of the carbon fiber flexible heating sheets 8 are connected with the D poles of the P-channel MOSFETs corresponding to the isolation circuits through connectors; 4 control output pins of the microprocessor are respectively connected with 4 input pins corresponding to the control end of the 4-channel high-speed optical coupling isolation chip, 4 output pins of the controlled end of the 4-channel high-speed optical coupling isolation chip are respectively connected with the B poles of 4 corresponding NPN type triodes, and the C poles of the 4 NPN type triodes are respectively connected with the G poles of the corresponding P-channel MOSFET; a control end power supply of the 4-path high-speed optical coupling isolation chip is connected with the output end of the 3.3V voltage-stabilized power supply, and a ground wire and the control unit are subjected to common ground treatment; the controlled end power supply is connected with the output end of the 5V stabilized power supply, and the ground wire and the control unit are subjected to common ground processing.
Specifically, the user can also use the mobile device to perform bluetooth communication and information interaction with the intelligent control device, and the user interaction device feeds back the current actual thermal sensation vote value input parameters of the user, sets and modifies the parameters required by the intelligent control device and the upper limit and lower limit target values of the internal temperature of the cold-proof clothes, and can view the real-time temperature information of key parts of the chest, abdomen, back and waist 4 of the human body in the inner layer of the cold-proof clothes.
The beneficial effects that the invention can realize are as follows:
according to the cold-proof clothes heat comfort control method and system provided by the invention, in the use process of the cold-proof clothes, the input parameter information of the external environment of the environment where the current user is located and the input parameter of the temperature of the inner surface of the cold-proof clothes are obtained according to the key part of the user, the V-COMFA prediction heat sensation model is called to obtain the prediction heat sensation voting value of the current user, the heating mode of the heating device is changed by combining the user data input parameter set by the user according to the wearing condition of the user and the current actual heat sensation voting value input parameter of the user, the automatic frequency conversion control of the temperature of the heating device of the cold-proof clothes is realized in a PID closed-loop control mode, the heat exchange efficiency inside the cold-proof clothes is accelerated by adopting the capillary tubes, the human body is kept in a heat comfort temperature environment all the time, the heat comfort requirement of the cold-proof clothes of the user is met, the condition that the common clothes cannot meet the self-heating deficiency of the human body under the cold condition is made up, the efficiency and the safety of outdoor workers under the environment conditions such as the high-cold climate are greatly improved, and the official soldiers need is higher.
The various component embodiments of the present invention may be implemented in hardware, firmware, software, or a combination thereof, and in the foregoing implementation, one or more steps may be implemented by flow instructions or signal instructions in a memory, that is, by encoding on a microprocessor or a signal processor, the functions of the method and module for implementing the method and apparatus for fast identifying key parameters of a main control structure plane according to the present invention are implemented.
Rather, in the use of embodiments, all of the features disclosed in this specification, and any or all of the methods or apparatus so disclosed, may be utilized, individually or collectively, in any or all combinations, except for a few of the modules and method uses which are mutually exclusive.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art without inventive work within the technical scope of the present invention are included in the scope of the present invention.

Claims (10)

1. An intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control system is characterized by comprising an intelligent control device, and a data acquisition device, a heating device, a power supply device and a user interaction device which are respectively connected with the intelligent control device;
the data acquisition device is used for acquiring external environment input parameters and obtaining the input parameters of the temperature of the inner surface of the cold-proof coat, the external environment input parameters comprise air temperature, relative humidity, air flow rate, black ball temperature and atmospheric pressure, and the external environment input parameters and the input parameters of the temperature of the inner surface of the cold-proof coat are transmitted to the intelligent control device;
the heating device is used for heating;
the power supply device is used for supplying power to the data acquisition device, the heating device and the user interaction device;
the user interaction device is used for obtaining user data input parameters and transmitting the user data input parameters to the intelligent control device, and the user interaction device can also receive votes of users on current actual thermal senses and obtain current actual thermal sense voting value input parameters of the users;
the intelligent control device is used for calling a V-COMFA predictive thermal sensing voting value according to the received external environment input parameters, the internal surface temperature input parameters of the cold-proof suit and the user data input parameters to obtain a predictive thermal sensing voting value of the current user, correcting the predictive thermal sensing voting value of the current user according to the current actual thermal sensing voting value input parameters of the user given by the user, and changing the heating mode of the cold-proof suit.
2. The intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control system of claim 1, wherein the data acquisition device comprises an environment temperature and humidity sensor, a wind speed sensor, a black ball temperature sensor, an atmospheric pressure sensor and a cold-proof clothes inner surface temperature sensor;
the environment temperature and humidity sensor is used for obtaining air temperature and relative humidity, the air speed sensor is used for obtaining air flow rate, the black ball temperature sensor is used for obtaining black ball temperature, the atmospheric pressure sensor is used for obtaining atmospheric pressure, and the temperature sensor on the inner surface of the cold-proof clothes is used for obtaining the temperature of the inner surface of the cold-proof clothes at the position of the heating device.
3. The intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control system of claim 2, wherein the heating device comprises a plurality of heaters and heating tubes connected to the heaters, and the heating tubes are used for conducting heat emitted by the heaters to exchange heat with a human body;
the number of the temperature sensors on the inner surface of the cold-proof clothes corresponds to the number of the heaters.
4. The intelligent variable-frequency temperature-controlled self-heating cold-proof clothing heating comfort control system as claimed in claim 1, wherein the V-COMFA predicted heat sensation model is
Budget＝M-C-L-E+R RT
Wherein: and (3) Budget: human body heat sensation prediction, W/m 2 (ii) a M: individual metabolic intensity, W/m 2 ；R RT : radiation absorbed by the human body, W/m 2 (ii) a C: convective heat loss, W/m 2 (ii) a E: heat loss by evaporation, W/m 2 (ii) a L: long wave radiation, W/m 2 。
5. An intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control method is characterized in that the intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control system is adopted to carry out the intelligent frequency-conversion temperature-control self-heating cold-proof clothes heat comfort control method, and comprises the following steps:
step 1: acquiring an external environment input parameter and an inner surface temperature input parameter of the cold-proof clothes through a data acquisition device;
and 2, step: user data input parameters and the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes are preset are obtained through a user interaction device;
and step 3: calculating a current V-COMFA thermal sensation predicted value B through an intelligent control device;
and 4, step 4: voting the current actual thermal sensation by the user through the user interaction device to obtain a current actual thermal sensation voting value input parameter of the user, and correcting the V-COMFA thermal sensation predicted value B obtained in the step 3 according to the current actual thermal sensation voting value input parameter of the user to obtain a system operation mode parameter BK;
and 5: the intelligent control device obtains the system operation mode parameter B K And the temperature input parameters of the inner surface of the cold-proof clothes change the working mode of the cold-proof clothes by changing the heating power of the heating device, so that the human body is always in a hot and comfortable temperature environment.
6. The method of claim 5, whichCharacterized in that, the external environment input parameters comprise: air temperature T a Relative humidity of
Figure FDA0003771694210000032
Black ball temperature T g Atmospheric pressure P and air flow velocity V;
temperature t of inner surface of cold-proof clothes n (n＝1,2,3,4…)；
The user data input parameters comprise parameters Ma corresponding to the current human body activity; current total clothing thermal resistance r co The temperature of the inner surface of the cold-proof clothes of the heating area of the inner layer of the preset cold-proof clothes comprises the following steps: presetting initial upper limit value t of temperature of inner surface of cold-proof clothes in inner heating area of cold-proof clothes max And an initial lower limit value t min 。
7. The method of claim 6, wherein said step 3 comprises the steps of:
step 3.1: according to the parameters Ma of human activity and air temperature T a Calculating the individual metabolic heat production quantity M, wherein the calculation formula is as follows:
M＝(0.85+0.0173e+0.0014T a )M a
wherein:
Figure FDA0003771694210000031
and Ma: parameter of physical activity amount, W/m 2 ；T a : air temperature, deg.C; e: ambient air vapor pressure, kPa;
step 3.2: according to total clothing thermal resistance r co Air velocity V and inner surface temperature t of cold-proof clothing n And calculating the heat flow loss C according to the calculation relationship:
Figure FDA0003771694210000041
wherein:
Figure FDA0003771694210000042
Figure FDA0003771694210000043
Figure FDA0003771694210000044
Figure FDA0003771694210000045
ρC p : volumetric heat capacity of air, J/m 3 ·K；T sk : skin surface temperature, deg.C; t is t n : the temperature of the inner surface of the cold-proof coat is at DEG C; r is a : boundary air resistance, s/m; p is r : prandtl number, 0.71; v: air flow rate, m/s; k: thermal diffusivity of air, m 2 S; v: kinematic viscosity, m 2 S; a, n: obtaining an empirical constant according to a cylinder heat flow experiment; r is co : the total clothing thermal resistance is 3405.72s/m when the air flow rate is less than or equal to 0.7 m/s; r is a radical of hydrogen c : the total clothing thermal resistance is s/m when the air flow rate is greater than 0.7 m/s; v. of ac : moving speed, m/s;
step 3.3: calculating long wave radiation L by the following formula:
L＝A eff εσ(T sf +273.15) 4
wherein:
Figure FDA0003771694210000046
T sf : garment surface temperature, deg.C; epsilon: emissivity of human skin and clothing; σ: stefan-boltzmann constant, 5.67 × 10 -8 W·m 2 /K 4 ；A eff : the effective radiation area coefficient of the dressed human body is 0.78;
step 3.4: calculating to obtain the evaporation heat loss E, wherein the calculation formula is as follows:
E＝E s +E i
wherein: e s ＝0.42(M-58)，
Figure FDA0003771694210000051
r av ＝0.92r a ，q a ＝0.622×e(P-e)，q s ＝0.622e sk (P-e sk )，
Figure FDA0003771694210000052
E s : showing sweat evaporation amount, W/m 2 ；E i : no sweat evaporation, W/m 2 ；q a : air temperature T a Specific humidity, kg/kg; q. q.s s : skin temperature T sk Specific humidity, kg/kg; ρ: air Density of 1.395kg/m 3 ；L v : latent heat of vaporization, kJ/kg; r is a radical of hydrogen av : boundary air evaporation thermal resistance, s/m; r is a radical of hydrogen cv : clothing evaporative thermal resistance, r cv ＝r c ；r tv : evaporation resistance of deep skin, s/m; p: atmospheric pressure, 101.325kPa;
step 3.5: calculating the radiation absorbed by the body R RT The calculation formula is as follows:
Figure FDA0003771694210000053
wherein:
Figure FDA0003771694210000054
T rt : radiation temperature, deg.C; t is g : black sphere temperature, deg.C;
step 3.6: calculating the current human body thermal sensation pre-measurement Budget, wherein the calculation relationship is as follows:
Budget＝M-C-L-E+R RT
step 3.7: calculating a current human body thermal sensation predicted value B, wherein the calculation formula is as follows:
Figure FDA0003771694210000055
8. the method of claim 7, wherein said step 4 comprises the steps of:
step 4.1: voting the current actual thermal sensation by the user through the user interaction device, acquiring the current actual thermal sensation voting value input parameter TSV of the user, and calculating the current correction parameter K of the prediction thermal sensation model n The following conditions are satisfied between the current actual thermal sensation voting value input parameter TSV of the user and the prediction result B of the current V-COMFA prediction thermal sensation model:
Figure FDA0003771694210000061
wherein: k n -the correction parameters at the current nth vote (n =0,1,2,3 \ 8230;);
step 4.2: the intelligent control device calculates a thermal sensation predicted value correction parameter K, and a calculation formula of the correction parameter K is as follows:
Figure FDA0003771694210000062
step 4.3: after the user finishes the actual thermal sensation voting link, the intelligent control device obtains the correction value Budget of the human body thermal sensation prediction quantity by correcting the V-COMFA thermal sensation prediction model * The calculation formula is as follows:
Budget * ＝Budget+K
step 4.4: the intelligent control device predicts the correction value through human body heat sensationBudget * Obtaining the system operation mode parameter B K The relationship is calculated as follows:
Figure FDA0003771694210000071
9. the method of claim 8, wherein said total body apparel thermal resistance r co Calculating the sum of the thermal resistances of the current clothes selected by the user through the user interaction device;
in the step 5, the intelligent control device judges the system operation mode parameter B K Determining whether the current heating device needs to change the working state:
when B is present K Stopping heating when the temperature is more than or equal to 0;
when B is present K If < 0, then: judging the temperature of the inner surface of the cold-proof clothes and t min And t max The relationship of (1):
when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is less than t min When the heat-insulating clothes are used, the heating device of the heating area of the inner layer of the cold-proof clothes operates in a full-power mode;
when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is more than or equal to t min Less than t max When the temperature control clothes are used, the heating device of the heating area of the inner layer of the cold-proof clothes operates in a frequency conversion working mode;
when the temperature of the inner surface of the cold-proof clothes in the heating area of the inner layer of the cold-proof clothes is more than or equal to t max The heating device of the heating area of the inner layer of the cold-proof clothes does not operate, so that the human body is always in a hot and comfortable temperature environment;
the intelligent control device controls the heating power of the heating device in a PID closed-loop control mode, and changes the heating power of the heating device by controlling the input voltage duty ratio of the input heating device, so as to realize a variable-frequency working mode.
10. An intelligent frequency-conversion temperature-control self-heating cold-proof garment, which comprises a cold-proof garment body and is characterized by further comprising the intelligent frequency-conversion temperature-control self-heating cold-proof garment heat comfort control system of any one of claims 1 to 4.
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