Earticle

The study was conducted to investigate the fire probability of fires, electronic circuits, and lithium batteries, and to contribute to improving prevention of fire prevention and fire investigation personnel based on the results of the fire, referring to the fire probability of the recent increase in personal mobility of personal mobility. The test specimen was used by the electric wheel, lithium polymer, and lithium ion batteries. The experimental analysis analyzed the risk and causes of thermal shock caused by thermal changes in the driving motor and measured risk of explosion of lithium batteries, measured risk measurements according to the internal and external paragraph, and the risk of explosion by overloading the explosives. Several sources have been cited in relation to the latest issue of smartphone battery fires.

The purpose of this study is to analyze the heat release rate of the initial combustible or heat source in the ignition phase and to determine the criterion for determining whether ignition is possible in the surrounding combustible material in a short time, In the false method of qualitatively estimating the combustion scale of the ignition source with the simple experience of the fire investigator by tracking the progress pattern of the fire in the situation where the initial evidence is lost and there is no witness, To compare the growth rates and to define the ignition characteristics.

In this study, the ventilation fan fire case of the hospital was analyzed and the temperature and current of the fan motor were measured through various experiments such as voltage fluctuation, motor restraint, ignition by external heat, and combustion expansion according to the duct hose material. The purpose of this study is to investigate the actual use of ventilation fan(fan motor) in the hospital room where the damage of many patients is worried when a fire occurs, and to suggest improvement methods such as fan management and duct hose material selection.

Recently, “Sandwich Panel” has been used a lot in factories, warehouse, and even verandas of residence for expansion because it is low-priced and superior in warmth, insulation and waterproof. Under construction of Sandwich Panel, some fire accidents have been broken out many times due to welding and fusing, but other types of case erecting Sandwich Panel with electric wires in construction buildings for boring have made fire accidents two times as well in this regard some experiments regarding ignition have presented possibilities of future fire accidents related to using “Sandwich Panel”. Accordingly, there is a recommended necessity to regulate the erecting “Sandwich Panel” with electric wires for boring because it is easy to set a fire. Therefore, active public relations to inform people of dangerousness of using “Sandwich Panel” are very needed

The use of portable butane gas stoves and jointed cylinders due to the convenience of movement and use has been steadily increasing, and gas(explosion) accidents are continuously occurring. Therefore, in this paper, Movable butane burner(jointed cylinders) experiment of gas explosion due to the operation and heating of the heater such as an electric range using flameless type heat, the analysis of the correlation between gas explosion and diffusive combustion according to the butane gas jointed cylinders and the type of heating service apparatus, and suggestions for improvement according to based on forensics and implications. In the case of an electric stove, the physical explosion and the possibility of diffusive combustion of the butane gas jointed cylinders are low, and the induction electric range, which is an induction heating system of electric field type, causes a physical explosion phenomenon due to expansion of the pressure inside the container. However, diffusion combustion of butane gas diffused after the explosion did not occur. In addition, the highlight electric range, which is a direct heating method in the form of a nichrome wire heating element, can confirm that after the physical explosion, the butane gas that has been opened later is extended diffusion combustion by the ignition source of the device itself to diffusion combustion to the surrounding combustibles. Therefore, based on these results, it is expected that the precision scientific forensics and investigation will be carried out in a gas accident site using a portable butane gas stoves(jointed cylinders) and flameless heating service apparatus

According to results from fire experiment of ignition possibility about adhesive that is used in polystyrene for sandwich panel, which is construction supplies, and from antiflame resistance styrofoam in core of sandwich panel, After examining the process of burning expansion of the sandwich panel structure, we will propose a solution to this problem.

Through this research, development of a gas concentration level decomposition algorithm, detection of a gas concentration signal and development of an amplification circuit, development of a transmission technique by gas concentration level wired / wireless communication, etc. are performed, and a detection unit , A receiver, and a control algorithm for the Internet part. We also conducted experiments that match the purpose by conducting performance evaluation and function experiments through control PCB, mechanical device fabrication and assembly of major subassembly products.