EN 342 ISO 15831 Female Warm Body Dummy ASTM F2370 2371 Clothing Thermal And Moisture Comfort Tester

Introduction

This warm body dummy fully and realistically simulates the human body, including details such as fingers and the face. Pure nickel wires of approximately 700mm are placed from the fingers to the nasal cavity inside the dummy. Independent intelligent circuits ensure the accuracy of the measurement process. The internal circuits in each part ensure the accuracy of the measurement, and the built-in heat conduction system ensures excellent uniformity. At the same time, this dummy can be divided into two parts, making it easy to transport.

Product Function

The thermal human model system (heated sweating dummy) is used to evaluate the overall thermal and moisture comfort of clothing, providing precise and effective experimental data for the research on mine heat hazard prevention technologies and the analysis and identification of heat hazard accidents in metal and non-metal mines.

Warm body mannequins can be classified into two types:

1. Segmental warm body mannequins

Most warm body mannequins are composed of multiple segments that are individually controlled by a temperature and measurement system (although their purpose is to quantitatively describe the overall heat transfer performance). The surface temperature of all segments can be controlled at the same temperature level (34°C), or the surface temperatures of the segments may vary, with the temperatures of the limbs being lower than those of the head and trunk. This type of warm body mannequin can provide the relative heat loss of each segment under certain environmental conditions, measure the thermal resistance values and evaporative impedance values of each segment. However, most multi-segment warm body mannequins have internal heat transfer from one segment to another, and there is heat flow between the segments within the clothing layer - these will affect the accuracy of the local resistance values. Additionally, for multi-segment warm body mannequins, there are two different methods for calculating the clothing thermal resistance:

① The overall method. First, sum up the heat losses of each segment, weight the body surface temperatures by area, sum up the surface areas of each segment, and then calculate the total thermal resistance of the clothing.

② The local method. First, calculate the thermal resistance of each clothing segment, and then obtain the total thermal resistance of the clothing by weighting the local body surface areas of each segment of the warm body mannequin. [7] The local method often gives higher thermal resistance values. Due to the uneven distribution of the clothing's thermal resistance on the body surface, the thermal resistance calculated using the local method varies greatly. [8-9] When a certain segment, such as the abdomen, has better insulation compared to other segments, its heat loss will be very low or close to zero, resulting in a too high measured local thermal resistance value. Then, the total thermal resistance calculated using the local method is too high.

2. Mobile warm body mannequins

In most cases, people use warm body mannequins in a standing position, but an increasing number of researchers combine warm body mannequins with external automatic devices and use mobile warm body mannequins to measure the clothing's thermal resistance. [10-13] In both cases, the movement will increase convective heat loss and reduce the clothing's thermal resistance value. At this time, the thermal resistance is called dynamic thermal resistance. The international standard ISO 15831 provides a testing procedure for measuring dynamic thermal resistance using mobile warm body mannequins. Very few laboratories have used mobile sweating mannequins.

Product Details

This warm body dummy fully and realistically simulates the human body, including details such as fingers and the face.

Pure nickel wires of approximately 700mm are placed from the fingers to the nasal cavity inside the dummy. Independent intelligent circuits ensure the accuracy of the measurement process.

The intelligent circuits within each part ensure the accuracy of the measurement, and the built-in heat conduction system ensures good uniformity.

At the same time, this dummy can be divided into two parts, making it easy to transport.

Technical/Performance Parameters:

Compliance with standards

ISO 15831, ASTM F2370-05, ASTM F2371-05, EN 13537, EN 342, etc.

The body shape and size conform to the physiological and anatomical characteristics of the human body:

1. #Model size: The model is of the average height of an Asian male.

2. #Standard measurement area: 22 independent controlled thermal energy areas.

3. Section area: Head - 1391 cm², anterior chest - 1880 cm², back - 1780 cm², abdomen and buttocks - 1808 cm², thighs - 1696 cm² × 2, calves - 1203 cm², feet - 572 cm² × 2, arms - 1234 cm² × 2

Connection: There are seams at the shoulders, hips, knees, elbows and ankle joints.

5. Weight approximately 30 kilograms.

6. #Standard clothing size M;

7. Center temperature variation range: 37 ± 0.1℃.

8. Heating wires and wired temperature and humidity sensors throughout the body (including 18 temperature sensors and 18 humidity sensors) can precisely control and measure skin temperature. The temperature sensor accuracy is ±0.1℃, and the humidity sensor accuracy is ±3%.

9. Under normal circumstances, the maximum heating power is 1200W/㎡ (dry and wet states).

10. It can also be used in wet skin conditions.

11. Operating environment requirements: Temperature -50 to 150℃, humidity 0 to 100%;

Monitoring System

1. Comprising 1 computer, software control system, and monitoring system.

2. The computer control analysis software can control and monitor the normal operation of the above components, collect data, perform further calculations, and display real-time test results (such as clothing thermal resistance value, clothing moisture resistance value, clothing permeability rate, clothing clo value, etc.), providing data analysis, data storage, and print output functions; the analysis software provides results such as thermal resistance value, moisture resistance value, clo value, and permeability rate; the entire system can test indicators including: dynamic (static) thermal resistance value and moisture resistance value, and realize dynamic storage and reproduction of process parameters such as temperature, humidity, power, water circulation, and sweat volume.

Technical specifications

Temperature System

Sweating System