Application Prospects of Burning DummyRelease time: 2014-11-19 15:54
Improvement of dummy test system
1) Further improve the sensor to get closer to the properties of real skin. The selection of sensors is a very important part. The sensors currently used are mainly copper sheet sensors and skin analog sensors, but they are all insufficient. Copper sheet sensors have different heat absorption rates from the skin. The temperature of the skin rises faster than copper sheet sensors. The density, heat capacity, and heat dissipation coefficient of skin analog sensors have a certain gap with the skin. Therefore, improving the sensor to bring it closer to the skin's heat absorption capacity is of great significance for improving the accuracy of the combustion dummy test.
2) Combining burning dummy and sweating dummy to comprehensively and objectively evaluate protective clothing. Under current test conditions, neither the TPP test device nor the combustion dummy test system can simulate water vapor transmission. Water vapor transmission has a non-negligible effect on protective performance. Firefighters often get wet during the fire, and the firefighters themselves sweat. If the burning dummy can be improved and the sweating state can be simulated, that is, the perfect combination of the burning dummy and the sweating dummy can be used to provide objective test results for the overall test of the protective clothing, whether it is protective performance testing or comfort testing. .
3) Intelligent research of burning dummy, more realistic simulation of fire fighting situation. Most of the existing burning dummies in the world cannot move. The difference in activity level will definitely affect the test results of the protective performance. Therefore, the evaluation and research of the thermal protective performance cannot be limited to the case of the static state. If the dummy is equipped with an intelligent system to make it more like a real person, it can more realistically simulate the actual fire-fighting situation of firefighters, and more objectively and comprehensively evaluate fire service clothing.
4) Realize the reproduction of various fire conditions and expand the research field of flame retardant protective clothing. The current combustion dummy system can only simulate the fire environment, but in addition to the fire, there may be water, smoke, and poison. Improve the combustion dummy test system so that it can simulate fire, water, poison, and smoke. The fire field environment can broaden the research field of flame retardant protective clothing.
Widening of application fields
① The combustion dummy test technology is the internationally recognized best technology for objectively evaluating the overall thermal protection performance of clothing. Possible future application areas:
② Test and analyze clothing. The combustion dummy test system can be used to carry out flame retardant performance evaluation and study of influencing factors of various fire protection clothing, military uniforms and other protective equipment. Shorten the research cycle of new flame retardant materials and equipment, improve research level, and promote the development of personal protective equipment.
③ Study the human body. The combustion dummy test system is used to create real flame-clothing-skin environmental conditions, and to monitor the heat flow and temperature changes of the dummy skin during the combustion process, which provides an effective data basis for further biophysical research on human skin tissue burn analysis.
④ Safety protection. In addition to fire protection clothing, ordinary clothing also requires certain flame retardancy. Burning dummy can not only be used in military protective clothing testing, but also has important research significance in civil use for advancing the research and development of thermal protective fabrics, clothing and other equipment, and protecting the human body from dangerous environments such as fire and heat radiation.
The main components of the burning dummy system
The system is mainly composed of a burning dummy, a data acquisition device, a flame generation and control device, a skin heat transfer model and a burn evaluation model, and a system centralized control and application software platform. The principle is to simulate the thermal exposure process of the human body in the burning flame and test the change of the surface temperature of the dummy. It is estimated that the second and third degree burns of the skin and the percentage of total burn area may be caused. The greater the percentage of burn area, the greater the resistance of the clothing. The worse the fire protection performance.
Burning dummy. It is made of non-metallic materials. The duration of the flame during the clothing test is generally 4s. The surface of the dummy needs to have good thermal stability under the condition of 300 ° C burning flame.
sensor. The response of the sensor on the surface of the burning dummy to the burning flame should be close to the response of the human skin to the flame. At present, the sensors used at home and abroad are mainly TPP copper sheet heat flow sensor, adiabatic copper sheet sensor and embedded thermocouple sensor. The sensor layout needs to consider factors such as dummy area, data collection, and burn assessment calculations.
data collection. The data acquisition device mainly completes the signal acquisition processing of each sensor on the surface of the dummy. To ensure the simultaneous and efficient acquisition of multiple sensor signals, multiple data processing units are required.
Flame generating and controlling device. Flame generation and control devices include the choice of fuel (usually propane materials), gas delivery pipes and burners.
application. The application software platform is the nerve center of the entire system, and is mainly composed of data acquisition module, detection and control module, matrix operation module, burn prediction analysis processing module and system resource management module.
Article source: Standard Group (Hong Kong) Limited
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