CN113533426A - Wearable bra for measuring thermal resistance of bra - Google Patents

Wearable bra for measuring thermal resistance of bra Download PDF

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Publication number
CN113533426A
CN113533426A CN202110953664.XA CN202110953664A CN113533426A CN 113533426 A CN113533426 A CN 113533426A CN 202110953664 A CN202110953664 A CN 202110953664A CN 113533426 A CN113533426 A CN 113533426A
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bra
brassiere
wearable
heating
thermal resistance
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张辉
黎焰
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Beijing Institute Fashion Technology
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Beijing Institute Fashion Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity

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Abstract

The invention discloses a wearable bra for measuring thermal resistance of the bra, which comprises the following steps: wear wearable electrical heating brassiere on the people's platform, wear the brassiere that awaits measuring again, the position of wearable electrical heating brassiere heating can adjust the setting according to the style of corselet to can accurately measure the heat through the brassiere, and then calculate the heat insulating ability index of brassiere product, if: a value of Crohn. The wearable electric heating bra is worn on a mannequin and then worn on a bra to be tested to test the heat preservation performance, the wearing state of the bra is closer to that of a product than a fabric test, the heat conduction quantity of bra cups is measured by using the wearable electric heating bra, the heat resistance is calculated, the test result is closer to the heat insulation state when a human body wears, the data is more accurate, the seasonal environment suitable for the bra is determined, and the wearable electric heating bra is lighter and more convenient to move than a warm-body dummy.

Description

Wearable bra for measuring thermal resistance of bra
Technical Field
The invention relates to the field of bras, in particular to a wearable bra for measuring thermal resistance of the bra.
Background
Currently, warm-body dummy is generally adopted for measuring the heat preservation of clothes. However, the thermal manikin is very heavy and inconvenient to move.
Theoretical research and model making of warm-body dummies in China began late, and since the 70 s of the 20 th century, China began to attach importance to the development of warm-body dummies, and the general logistics military equipment research institute was the earliest unit for researching warm-body dummies at that time. In the 70 s of the 20 th century, the institute of military equipment in the general service part successfully developed a constant-temperature body-warming dummy, and in the 80 s developed a variable-temperature body-warming dummy, which was widely applied to the development of various special clothes; the sweating thermal manikin began to be studied in the 90 s and a sweating thermal manikin test system was successfully developed in 2000.
The heat insulating performance of the existing warm body dummy measurement clothes cannot accurately represent the heat insulating performance of the female bra. Although the thermal insulation performance of the garment can be measured by the thermal manikin, the thermal insulation performance of the local garment corresponding to each zone can be measured and calculated due to the fact that the thermal manikin is heated in a zone mode, but most of measurement objects of the thermal manikin are conventional garments with large coverage areas for human bodies, and for special garments only covering the local human bodies, the measurement objects are as follows: the measurement result of the bra is different from the actual wearing feeling. After a human body wears the bra, the bra only has a remarkable influence on the heat dissipation capacity of a small area covered by the bra but not on the whole body, and the traditional method for solving the heat retaining property of the clothes is to calculate the area weighting of the thermal resistance of each area of the human body, so that the method is significant for conventional clothes with large human covering materials, but is not suitable for bra products. For example: if a full cup brassiere has a thermal resistance of 1 clo of cup material, if the thermal resistance of the brassiere is calculated in an area-weighted manner, assuming that the brassiere coverage area occupies 3.2% of the human body surface area, the thermal resistance of the brassiere is 0.032 clo, and when the thermal resistance of the cup material is 2.2 clo, the thermal resistance of the brassiere is 0.0704 clo. If the thermal resistance of the two shirts or pants is 0.032 and 0.0704, respectively, and the difference between the two is 0.0384, the wearer cannot feel the wearer at all because the thermal resistance of the boundary layer air between the body and the garment surface can be as high as about 0.8. The heat sensation at the chest of the wearer of these two brassieres is very different. Therefore, the heat insulation performance of the bra cannot be reasonably represented by calculating the thermal resistance of the clothes by using the traditional human body whole body area weighting mode. Solving for the heat dissipation through only the bra coverage area is important to evaluate the heat and moisture comfort performance of the bra product.
Because brassiere products are also typically constructed from multiple layers, multiple materials, and cannot be accurately characterized by the properties of the fabric.
Brassiere-like products have different types of cups, such as: full cup, 1/2 cup, 3/4 cup, 5/8 cup, etc., the current body warming dummy cannot accurately measure the heat passing through various cups. While warm body dummy products may be used to measure feminine garments through a removable breast cover, they merely mimic the shape of a woman and likewise do not measure heat through the brassiere with relative accuracy. The invention provides a wearable bra for measuring the thermal resistance of the bra, which is specially used for heat insulation performance test equipment of bra products aiming at the defects of the measuring equipment.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a wearable bra for measuring thermal resistance of the bra.
The invention provides the following technical scheme:
a wearable brassiere for measuring brassiere thermal resistance includes the following steps:
wear wearable electrical heating brassiere on the people's platform, wear the brassiere that awaits measuring again, the position of wearable electrical heating brassiere heating can adjust the setting according to the style of corselet to can accurately measure the heat through the brassiere, and then calculate the heat insulating ability index of brassiere product, if: a Crohn value;
the formula for calculating the clo value is:
Figure BDA0003219532650000021
in the formula:
Rclthermal resistance of the brassiere, clo;
Asm is the area of the heating area covered by the brassiere to be measured2；
tsThe area weighted average temperature (DEG C) of a heating area covered by the bra to be tested;
taambient temperature, deg.C;
Hdthe dry heat input power W of the area covered by the bra to be tested;
Rais the thermal resistance of the boundary layer air.
Preferably, the temperature of the bra is simulated through an electric heating unit on the surface of the bra, and the electric heating unit can be an electric heating wire, a graphene material, a carbon fiber material and a carbon nanotube and can detect the temperature in real time through a temperature sensor.
Preferably, when the temperature is lower than the set temperature, the power is switched on for heating, and when the temperature is higher than the set temperature, the power is switched off for stopping heating, the temperature simulation range is 20-36 ℃, the measurement is carried out in a constant temperature and humidity chamber, a constant temperature and humidity box and a climate box, and the measurement of the bra can also be carried out in indoor or natural environment.
Preferably, the chest of the wearable electric heating bra can be 6, 8, 10, 12, 14 and 16 symmetrically distributed heating zones, and the number of the zones of the heating zones can be designed and manufactured according to the requirement.
The invention provides a wearable bra for measuring thermal resistance of the bra, the wearable electric heating bra can be worn on a mannequin through the wearable electric heating bra, then the bra to be measured is worn, the heat preservation performance is tested, the wearable electric heating bra is closer to the wearing state of a product than a fabric test, the heat conduction quantity of bra cups is measured, the thermal resistance is calculated, the test result is closer to the heat insulation state when a human body wears the wearable electric heating bra, the data is more accurate, the seasonal environment suitable for the bra is determined, and the wearable electric heating bra is lighter and more convenient to move than a warm body dummy.
Drawings
FIG. 1 is a schematic of 6 heating zones of the present invention;
FIG. 2 is a schematic of 8 heating zones of the present invention;
FIG. 3 is a schematic of 10 heating zones of the present invention;
FIG. 4 is a schematic of 12 heating zones of the present invention;
FIG. 5 is a schematic of 14 heating zones of the present invention;
fig. 6 is a schematic of 16 heating zones of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
the first embodiment is as follows:
a wearable brassiere for measuring brassiere thermal resistance includes the following steps:
wear wearable electrical heating brassiere on the people's platform, wear the brassiere that awaits measuring again, the position of wearable electrical heating brassiere heating can adjust the setting according to the style of corselet to can accurately measure the heat through the brassiere, and then calculate the heat insulating ability index of brassiere product, if: a Crohn value;
the formula for calculating the clo value is:
Figure BDA0003219532650000041
in the formula:
Rclthermal resistance of the brassiere, clo;
Asm is the area of the heating area covered by the brassiere to be measured2；
tsThe area weighted average temperature (DEG C) of a heating area covered by the bra to be tested;
taambient temperature, deg.C;
Hdthe dry heat input power W of the area covered by the bra to be tested;
Rais the thermal resistance of the boundary layer air.
When the wearable electric heating bra is worn on a mannequin, a bra to be tested is worn, heating is started, dynamic balance is achieved, the surface temperature and the environmental temperature of the wearable electric heating bra and the regulation and control heating power are detected at least once every minute, and data can be read for calculation after the state is kept for more than 30 minutes;
example two:
wear wearable electrical heating brassiere on the people's platform, wear the brassiere that awaits measuring again, the position of wearable electrical heating brassiere heating can adjust the setting according to the style of corselet to can accurately measure the heat through the brassiere, and then calculate the heat insulating ability index of brassiere product, if: thermal resistance, Crohn's value;
Figure BDA0003219532650000051
in the formula:
Rclthermal resistance of the brassiere, clo;
Asim is the area of the heating area of the ith section covered by the bra to be measured2；
tsiThe average temperature of the heating area of the section i covered by the bra to be tested is DEG C;
taambient temperature, deg.C;
Hdithe dry heat input power W of the heating area of the ith section of the area covered by the bra to be detected;
Rathe thermal resistance of the boundary layer air clo.
The more the subareas are, the more bra types suitable for measurement are, because only the area covered by the bra is heated, and the area not covered by the bra is not heated, the better the subareas are;
wearable electrical heating brassiere surface is by a plurality of heating region structures, when measuring the heat insulating ability, to the brassiere of different grade type, if: the wearable electric heating bra comprises full cups, 1/2 cups, 3/4 cups, 5/8 cups and the like, heating areas of the wearable electric heating bra can be set as required, areas which are not covered by the bra to be tested do not need to be heated, and even if the areas are heated, the areas do not participate in calculation of thermal resistance, so that the heat insulation performance and the heat conduction quantity of the bra can be accurately measured;
during the test, wear it on the manikin of corresponding model, wear the brassiere that awaits measuring again to place in constant temperature and humidity room, constant temperature and humidity case, or the climatic chamber of constant temperature, humidity and specific wind speed, after certain time, the wearable brassiere of electrical heating reaches thermal balance, according to the power that the constancy of maintenance brassiere surface temperature needs, just can calculate the heat insulating ability of brassiere coverage area.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (4)

1. A wearable brassiere for measuring brassiere thermal resistance, its characterized in that includes the following step:
wear wearable electrical heating brassiere on the people's platform, wear the brassiere that awaits measuring again, the position of wearable electrical heating brassiere heating can adjust the setting according to the style of corselet to can accurately measure the heat through the brassiere, and then calculate the heat insulating ability index of brassiere product, if: a Crohn value;
the formula for calculating the clo value is:
Figure FDA0003219532640000011
in the formula:
Rclthermal resistance of the brassiere, clo;
Asm is the area of the heating area covered by the brassiere to be measured2；
tsThe area weighted average temperature (DEG C) of a bra heating area covered by the bra to be tested;
taambient temperature, deg.C;
Hdthe dry heat input power W of the area covered by the bra to be tested;
Rais the thermal resistance of the boundary layer air.
2. The wearable bra for measuring thermal resistance of a bra of claim 1, wherein: the temperature of brassiere simulates through the electrical heating unit on brassiere surface, and the electrical heating unit can be for heating wire, graphite alkene material, carbon fiber material and carbon nanotube to detect in real time through temperature sensor.
3. The wearable bra for measuring thermal resistance of a bra of claim 1, wherein: when the temperature is lower than the set temperature, the power is switched on for heating, when the temperature is higher than the set temperature, the power is switched off for stopping heating, the temperature simulation range is 20-36 ℃, the measurement is carried out in a constant temperature and humidity chamber, a constant temperature and humidity box and a climate box, and the brassiere can also be selected to carry out the measurement indoors or in the natural environment.
4. The wearable bra for measuring thermal resistance of a bra of claim 1, wherein: the chest of the wearable electric heating bra can be 6, 8, 10, 12, 14 and 16 symmetrically distributed heating zones, and the number of the zones can be designed and manufactured according to the requirement.
CN202110953664.XA 2021-08-19 2021-08-19 Wearable bra for measuring thermal resistance of bra Pending CN113533426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110953664.XA CN113533426A (en) 2021-08-19 2021-08-19 Wearable bra for measuring thermal resistance of bra

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110953664.XA CN113533426A (en) 2021-08-19 2021-08-19 Wearable bra for measuring thermal resistance of bra

Publications (1)

Publication Number Publication Date
CN113533426A true CN113533426A (en) 2021-10-22

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN113533426A (en)

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