Infant clothing comfort degree measuring system and method

Abstract

The invention discloses an infant clothing comfort degree measurement system and method. The system comprises a sweating child dummy system, an experiment cabin environment control system, a data collection system and a modeling and result analysis system. The sweating child dummy system comprises a child dummy body, a dummy sweating system, a temperature control system and a dummy action simulation system. The experiment cabin environment control system simulates natural environment conditions by setting radiation intensity and duration and setting temperature and humidity environment climate conditions; the data collection system collects sensor data in real time and sends the data to the modeling and result analysis system so as to construct a distribution diagram and a finite element model of clothes temperature and humidity values of the dummy in a standing or moving state in a corresponding environment condition and temperature and humidity values of a dummy-clothes space. And obtaining an optimized comprehensive evaluation model of the infant clothes. According to the system and the method, more comprehensive parameters are considered, dynamic / static data can be collected, and the comfort level of the infant clothes can be comprehensively evaluated or measured.

Description

Technical Field

[0001] The invention belongs to the technical field of clothing ergonomics measurement engineering, and relates to a system and method for measuring the comfort level of infant clothing. Background Art

[0002] The early childhood refers to the period from 1 year old to before school entry. This period is the fastest period of mental and physical development for young children. During this period, the development of the head of the child becomes slow, while the development of the arms and legs is very fast. In a person's life, the early childhood is the period when people like to be active, especially trying new activities. The individual performance tests of children's clothing, such as breathability, thermal insulation, and hygroscopicity, are very mature, but in activities under the full climate, the individual performance tests are not comprehensive enough, and the comprehensive evaluation or measurement of children's clothing has not yet been seen. Therefore, for young children who cannot express cold and heat, or the amount of clothes, it is very important to comprehensively evaluate the comfort of a piece of clothing, such as the weight, breathability, heat dissipation, thermal insulation, and hygroscopicity, under specific activity items and environmental conditions. That is to say, only comfortable clothing that can adjust heat and moisture balance under dynamic conditions is good clothing. At present, there are few test items and parameters, and the current tests are all used in static states, which cannot accurately simulate the activity state of the main body of children in early childhood, resulting in certain differences in the measurement results. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a system and method for measuring the comfort of children's clothing, which collects static and dynamic data of various motion postures through a dummy motion simulation system, and considers more comprehensive parameters to achieve a comprehensive evaluation or measurement of the comfort of children's clothing.

[0004] Technical solution: A system for measuring the comfort of infant clothing of the present invention comprises: a sweating child dummy system, an experimental cabin environment control system, a data collection system, a modeling and result analysis system; wherein:

[0005] The sweating child dummy system comprises a child dummy body, a dummy sweating system, a temperature control system and a dummy motion simulation system;

[0006] The experimental chamber environment control system simulates natural environmental conditions by setting the radiation intensity and duration, and setting the temperature and humidity environment climate conditions;

[0007] The data collection system collects sensor data in real time and sends the data to the modeling and result analysis system to construct a distribution diagram and a finite element model of the clothing temperature and humidity values ​​and the temperature and humidity values ​​of the person-clothing space when the dummy is standing still or moving in the corresponding environmental conditions, and the thermal insulation performance and breathability performance of the clothing are evaluated based on the finite element model and conditional parameter analysis; the sensors include irradiance sensors, pressure sensors, temperature sensors and humidity sensors.

[0008] Furthermore, 100 to 150 sweat pores are evenly arranged on the surface of the child dummy body, and the sweating rate of each sweat pore area is individually controlled by the dummy sweating system; the child dummy body is provided with joints, a trunk, limbs and a driving device, and the driving device is controlled by the dummy motion simulation system to drive the dummy to simulate various actions.

[0009] Furthermore, the actions include standing still, walking, running, and riding.

[0010] Furthermore, the temperature control system includes temperature sensors and a heating film, the temperature sensors are evenly distributed on the surface of the child dummy body, and the heating film covers the surface of the child dummy body.

[0011] Furthermore, the main body of the child dummy is divided into 34 independently controlled areas, and the temperature and sweating amount of each area are independently controlled.

[0012] Furthermore, the sensor includes an irradiance sensor, a pressure sensor, a temperature sensor, and a humidity sensor, and the data collection system collects the sensor data in real time by data line conduction.

[0013] Furthermore, the experimental chamber environment control system includes a fan, an air duct, a temperature and humidity system, an air supply and return system, and an ultraviolet lighting system of a UVA light source.

[0014] Furthermore, a detection method for a children's clothing comfort measurement system is provided, comprising the following steps: S1, simulating natural environmental climatic conditions in the experimental cabin through the experimental cabin environmental control system, setting the light source, radiation intensity and duration, temperature and humidity; S2, setting the posture of the child dummy body, and inputting corresponding metabolic parameters, obtaining the radiation, heat and humidity, and pressure data of the outer clothing and the heat and humidity data of the person-clothing space, so as to construct a distribution diagram of the temperature and humidity values ​​of the clothing and the temperature and humidity values ​​of the person-clothing space in the static state of the dummy and a finite element model; S3, obtaining an optimized comprehensive evaluation model of the children's clothing based on the finite element model and conditional parameters.

[0015] Furthermore, the step S2 is specifically the following steps: S201, setting the child dummy body to a static standing posture, giving the metabolic parameters of body temperature and sweating in this static standing posture, and outputting the heat and humidity of the child dummy body surface in this state; collecting sensor data, obtaining the radiation, heat and humidity, and pressure data of the outer garment, and the heat and humidity data of the person-clothing space, so as to construct a distribution diagram and a finite element model of the temperature and humidity values ​​of the clothing and the temperature and humidity values ​​of the person-clothing space in the static standing state of the dummy; S202, under the same environmental climatic conditions, setting the child dummy body to a moving posture, giving the metabolic parameters of body temperature and sweating in this moving posture, and outputting the heat and humidity of the child dummy body surface in this state; collecting sensor data, obtaining the radiation, heat and humidity, and pressure data of the outer garment, and the heat and humidity data of the person-clothing space, so as to construct a distribution diagram and a finite element model of the temperature and humidity values ​​of the clothing and the temperature and humidity values ​​of the person-clothing space in the moving state of the dummy.

[0016] Furthermore, the condition parameters in step S3 include radiation intensity, radiation duration, temperature and humidity conditions, circulating wind intensity, metabolic parameters, clothing structure, material, thickness, density, weight, sweating amount, and radiation angle.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. The comfort of infant clothing is evaluated by the sweating rate of the sweating child dummy under various conditions, the reaction of the clothing to the temperature and humidity of the body surface or the external temperature and humidity, and the ability to balance heat and humidity. The sweating child dummy is equipped with a motion simulation system, which can realize the collection of dynamic data, which is in line with the activity state of the child subject in early childhood;

[0018] 2. The evaluation system and method is based on the total sweat volume of the experimental subjects, combined with parameters including the climate environment, number of clothes, dressing method, activity level, etc. including the experimental conditions, and can conduct a comprehensive evaluation of the comfort of the clothing, such as weight, breathability, heat dissipation, heat preservation, moisture absorption, and heat absorption, so as to provide constructive suggestions on what children should wear and the order of dressing, and provide data support for the design of children's clothing, including material, structure, thickness, density, weight, etc., so as to better provide comfortable clothing for children. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the system structure of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the child dummy main body of the present invention.

[0021] Figure 3 is a flow chart of the measurement method of the present invention.

[0022] Figure 4 It is a distribution diagram of the temperature and humidity values ​​of clothing in a static state and the temperature and humidity values ​​of the person-clothing space of the present invention. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0024] like Figure 1 As shown, the infant clothing comfort measurement system of this embodiment includes: a sweating child dummy system 100, an experimental chamber environment control system 200, a data collection system 300, and a modeling and result analysis system 400. The sweating child dummy system 100 includes a child dummy body 101, a dummy sweating system 102, a temperature control system 103, and a dummy motion simulation system 104.

[0025] like Figure 2 As shown, in one embodiment, the size of the child dummy body 101 is 110 cm and the surface area is 11458 cm 2 , weighs about 10KG, this size is the average size of early childhood children and is representative. The child dummy body 101 is divided into 34 independently controlled areas, each area has an independent heating and temperature sensing system, and the temperature and sweating volume of each area are independently controlled. The surface of the child dummy body 101 is evenly provided with 100 to 150 sweating pores, preferably 120 sweating pores, and these sweating pores are individually controlled by the dummy sweating system 102 to control the sweating rate of each sweating pore area; the child dummy body 101 is provided with joints, torso and limbs, which are convenient for putting on and taking off clothes, and is also provided with a driving device, which is controlled by the dummy motion simulation system 104 to drive the dummy to simulate various actions, such as standing still, walking, running, riding, etc.

[0026] In this embodiment, the dummy sweating system 102 uses an imported high-precision conveying device and is equipped with a dedicated control software (Therm Dac software), which can independently control the sweating rate of each partition. This device ensures accurate control of the sweating rate, thereby simulating the sweating of the human body in different parts. Physiological saline is used to simulate sweat, and the sweating rate is set to: (500-1200) l / cm 2 / h.

[0027] In this embodiment, the temperature control system 103 includes a temperature sensor and a heating film. In order to improve the accuracy, a high-precision digital temperature sensor is used. These sensors are closely attached to the surface of the child dummy body 101, and can evenly distribute and monitor and control the temperature in real time. The heating film evenly covers the surface of the child dummy body 101, ensuring the uniformity and precise control of the temperature.

[0028] The experimental chamber environment control system 200 simulates natural environmental conditions by setting the radiation intensity and duration, and setting the temperature and humidity environment climate conditions. In this embodiment, the experimental chamber environment control system 200 includes a fan, an air duct, a temperature and humidity system, an air supply and return air system, and an ultraviolet lighting system of a UVA light source, which can adjust and control the temperature, humidity, and circulating wind intensity in the experimental chamber, and simulate the light intensity and exposure duration of outdoor sunlight at different time periods.

[0029] The data collection system 300 collects sensor data in real time and sends the data to the modeling and result analysis system 400 to construct a distribution diagram and a finite element model of the clothing temperature and humidity values ​​and the temperature and humidity values ​​of the person-clothing space when the dummy is standing still or moving in the corresponding environmental conditions. Based on the finite element model and condition parameters, the thermal insulation performance and breathability performance of the clothing are analyzed and evaluated, thereby further optimizing the comfort of the children's clothing.

[0030] The sensors include irradiance sensors, pressure sensors, temperature sensors, and humidity sensors. The sensors need to be placed in key locations of clothing to ensure accurate measurement of the temperature and humidity inside and outside the clothing. For example, temperature and humidity sensors can be installed on the inside and outside of clothing and close to the skin. In a specific embodiment, the parameters of each sensor are set as follows:

[0031] Irradiance sensor: Irradiance sensor performance measurement range: 0-2500W / m 2 ; Measurement accuracy control: ±5%; Resolution: 1W / m 2 ; Pressure sensor: The pressure sensor has high sensitivity, and its pressure range is 0~1lb (4.4N); Temperature sensor: The performance measurement range of the temperature sensor is: resistance: R25℃=10KΩ±1%, withstand voltage test: AC1750V / 1min, no breakdown or arcing, insulation test: ≥100MΩ / DC1000V, thermal time constant: about 10~20 seconds (in air), dissipation coefficient: minimum 3mW / ℃ (in air), operating temperature range: -50~120℃, maximum rated power: 250mW (in air); Humidity sensor: The performance measurement range of the humidity sensor is 0-100%; Data acquisition adopts data line conduction method, which can collect various test data of the dummy in real time.

[0032] Combination Figure 3The detection method of the comfort measurement system for infant clothing is described, including the following steps: S1, simulating natural environmental climate conditions in the experimental cabin through the experimental cabin environmental control system, setting the light source, radiation intensity and duration, temperature and humidity; S2, setting the posture of the child dummy body, and inputting the corresponding metabolic parameters, obtaining the radiation, heat and humidity, and pressure data of the outerwear, as well as the heat and humidity data of the person-clothing space, so as to construct the temperature and humidity value distribution diagram of the clothing and the temperature and humidity value distribution diagram of the person-clothing space in the static state of the dummy and the finite element model; S3, according to the above finite element model and conditional parameters, the thermal insulation performance and breathability of the clothing are analyzed and evaluated, so as to further optimize the comfort of the infant clothing. The above conditional parameters include radiation intensity, radiation duration, temperature and humidity conditions, circulating wind intensity, metabolic parameters, clothing structure, material, thickness, density, weight, sweating, and radiation angle.

[0033] In a specific embodiment, the optimization method includes:

[0034] 1. Model verification: Verify the accuracy of the model through experimental data or known results. Adjust model parameters and solution settings as needed.

[0035] 2. Sensitivity analysis: Conduct sensitivity analysis to understand the impact of different parameters on the model results.

[0036] 3. Optimize design: Based on the analysis results, optimize the clothing design to improve performance.

[0037] 4. Documentation and Reporting: Record the entire modeling process, including model settings, solution results, and analysis conclusions. At the same time, prepare technical reports for further research or design decisions.

[0038] Wherein, step S2 includes the following steps: S201, setting the child dummy body to a static standing posture, giving metabolic parameters of body temperature and sweating in this static standing posture, and outputting the heat and humidity of the child dummy body surface in this state; collecting sensor data, obtaining radiation, heat and humidity, and pressure data of outerwear, and heat and humidity data of the person-clothing space, so as to construct a distribution diagram and finite element model of the temperature and humidity values ​​of clothing and the temperature and humidity values ​​of the person-clothing space in the static standing state of the dummy; the distribution diagram of the temperature and humidity values ​​of clothing and the temperature and humidity values ​​of the person-clothing space in the static standing state is, for example, Figure 4 As shown; S202, under the same environmental climatic conditions, set the child dummy body to a motion posture, give the metabolic parameters of body temperature and sweating amount under this motion posture, and output the heat and humidity of the child dummy body surface in this state; collect sensor data, obtain the radiation, heat and humidity, and pressure data of the outer clothing and the heat and humidity data of the person-clothing space, so as to construct a distribution diagram of the temperature and humidity values ​​of the clothing and the temperature and humidity values ​​of the person-clothing space under the dummy motion state and a finite element model.

[0039] In a specific embodiment, in order to simulate and analyze the behavior of a thermal and hygroscopic physical system, a finite element model (FEM) is constructed for evaluating the temperature and humidity distribution of infant clothing under specific environmental conditions:

[0040] 1. Define the problem and goal: Clarify the goal of the model: evaluate the thermal insulation and breathability of children's clothing. At the same time, determine the environmental conditions that need to be simulated, such as temperature, humidity, wind speed, and clothing material properties.

[0041] 2. Geometric modeling: Collect point cloud data of key points of clothing and human body, and perform denoising, filtering and data cleaning to improve data quality.

[0042] Identify key features in point clouds, such as edges, corners, or planes for feature extraction. Align multiple point cloud datasets into a common coordinate system. Segment point clouds into distinct parts or objects. Reconstruct 3D surfaces or models from point cloud data.

[0043] 3. Meshing: Divide the geometric model into a finite number of small elements (triangles) to form the triangular structure of the 3D mesh.

[0044] 4. Material property definition: Assign material properties to each element in the model, including thermal conductivity, density, and specific heat capacity.

[0045] 5. Boundary conditions and initial conditions setting: define the boundary conditions of the model, including the interface between clothing and human body, and the external environment conditions of clothing. And set the initial conditions, including initial temperature and humidity.

[0046] 6. Select the appropriate finite element method: Select the appropriate finite element method according to the nature of the problem, including heat conduction and fluid dynamics.

[0047] 7. Solver settings: Configure the solver parameters, including time step, number of iterations, and convergence criteria.

[0048] 8. Model solution: Run the finite element analysis software to solve the model and obtain the results. Monitor the solution process to ensure convergence and accuracy.

[0049] 9. Result analysis: Analyze the solution results, including temperature and humidity distribution diagrams. And evaluate the thermal insulation and breathability of the clothing.

[0050] Finally, the evaluation conclusion was drawn: the comfort level of a piece of clothing, such as weight, breathability, heat dissipation, heat preservation, moisture absorption, and heat absorption, was evaluated based on the total sweat volume of the experimental subjects, the reaction of clothing to body surface temperature and humidity or external temperature and humidity, and the ability to balance heat and humidity. Constructive suggestions were provided on children's clothing, dressing order, etc., and data support was provided for the design of children's clothing (material, structure, thickness, density, weight), so as to better provide comfortable clothing for children.

Claims

1. A system for measuring the comfort of children's clothing, characterized in that: include: Sweating child dummy system, experimental chamber environment control system, data collection system, modeling and result analysis system; among which: The sweating child dummy system comprises a child dummy body, a dummy sweating system, a temperature control system and a dummy motion simulation system; The experimental chamber environment control system simulates natural environmental conditions by setting the radiation intensity and duration, and setting the temperature and humidity environment climate conditions; The data collection system collects sensor data in real time and sends the data to the modeling and result analysis system to construct a distribution diagram and a finite element model of the clothing temperature and humidity values ​​and the temperature and humidity values ​​of the person-clothing space when the dummy is standing still or moving in the corresponding environmental conditions, and the thermal insulation performance and breathability performance of the clothing are evaluated based on the finite element model and conditional parameter analysis; the sensors include irradiance sensors, pressure sensors, temperature sensors and humidity sensors.

2. The infant clothing comfort measurement system according to claim 1, characterized in that: The surface of the child dummy body is evenly provided with 100 to 150 sweat pores, and the sweating rate of each sweat pore area is individually controlled by the dummy sweating system; the child dummy body is provided with joints, a trunk, limbs and a driving device, and the driving device is controlled by the dummy action simulation system to drive the dummy to simulate various actions.

3. The infant clothing comfort measurement system according to claim 2, characterized in that: The actions include standing still, walking, running, and cycling.

4. The infant clothing comfort measurement system according to claim 1, characterized in that: The temperature control system comprises temperature sensors and a heating film. The temperature sensors are evenly distributed on the surface of the child dummy body, and the heating film covers the surface of the child dummy body.

5. The infant clothing comfort measurement system according to claim 1, characterized in that: The main body of the child dummy is divided into 34 independently controlled areas, and the temperature and sweating amount of each area are independently controlled.

6. The infant clothing comfort measurement system according to claim 1, characterized in that: The sensors include an irradiance sensor, a pressure sensor, a temperature sensor, and a humidity sensor. The data collection system collects the sensor data in real time by means of data line conduction.

7. The infant clothing comfort measurement system according to claim 1, characterized in that: The experimental chamber environment control system includes a fan, an air duct, a temperature and humidity system, an air supply and return system, and an ultraviolet lighting system of a UVA light source.

8. A detection method for the infant clothing comfort measurement system according to claim 1, characterized in that: The following steps are involved: S1. Simulate the natural environment and climate conditions in the experimental cabin through the experimental cabin environment control system, and set the light source, radiation intensity and duration, temperature and humidity; S2. Set the posture of the child dummy body and input the corresponding metabolic parameters to obtain the radiation, heat and humidity, and pressure data of the outerwear as well as the heat and humidity data of the person-clothing space, so as to construct a distribution diagram of the temperature and humidity values ​​of the clothing and the temperature and humidity values ​​of the person-clothing space when the dummy is in a static state and a finite element model; S3. Analyze and evaluate the thermal insulation performance and breathability performance of the clothing based on the finite element model and conditional parameters.

9. The detection method of the infant clothing comfort measurement system according to claim 8, characterized in that: The step S2 is specifically the following steps: S201, setting the child dummy body to a static standing posture, giving the metabolic parameters of the body temperature and sweating amount in this static standing posture, and outputting the heat and humidity of the child dummy body surface in this state; collecting sensor data, obtaining the radiation, heat and humidity, and pressure data of the outer garment, and the heat and humidity data of the person-clothing space, so as to construct a distribution diagram and a finite element model of the temperature and humidity values ​​of the clothing and the temperature and humidity values ​​of the person-clothing space when the dummy is in a static standing state; S202, under the same environmental climatic conditions, setting the child dummy body to a moving posture, giving the metabolic parameters of the body temperature and sweating amount in this moving posture, and outputting the heat and humidity of the child dummy body surface in this state; collecting sensor data, obtaining the radiation, heat and humidity, and pressure data of the outer garment, and the heat and humidity data of the person-clothing space, so as to construct a distribution diagram and a finite element model of the temperature and humidity values ​​of the clothing and the temperature and humidity values ​​of the person-clothing space when the dummy is in a moving state.

10. The detection method of the infant clothing comfort measurement system according to claim 8, characterized in that: The condition parameters in step S3 include radiation intensity, radiation duration, temperature and humidity conditions, circulating wind intensity, metabolic parameters, clothing structure, material, thickness, density, weight, sweating amount, and radiation angle.

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