Method for early ignition detection based on the sampling dispersion of dangerous parameter

B. Pospelov, E. Rybka, O. Krainiukov, Vasyl Fedyna, Yuliia Bezuhla, Andrii Melnychenko, Pavlo Borodych, S. Hryshko, Svyatoslav Manzhura, O. Yesipova
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Abstract

The object of the study is the selective dispersion of dangerous parameters of the gas environment during material fires. The practical importance of research consists in using the difference of sample dispersions of dangerous parameters of the gas environment on the intervals of absence and presence of ignition of materials for detection of ignition. The theoretical substantiation of the method of detecting fires in premises based on sample dispersions of current measurements of an arbitrary dangerous parameter of the gas environment, corresponding to the general populations of reliable absence and presence of fire, has been carried out. The method, at a given level of significance, determines the unbiased uniformly most powerful fire detection rule. This makes it possible to determine how much differences in sample variances are significant with a given level of significance and are caused by ignition or are random factors. Laboratory experiments were conducted to verify the proposed method. It was established that the influence of ignition on the value of the difference in the sample dispersion at the corresponding intervals of monitoring the carbon monoxide concentration, smoke density, and temperature of the gaseous environment of the laboratory chamber is different and depends on the type of ignition material. At the same time, the minimum difference of the sample dispersions is characteristic for observing the smoke density for all the studied materials. However, early detection of ignition of alcohol, paper, wood, and textiles when observing the smoke density is carried out when the threshold is exceeded by 9.01, 5.31, 2.13 and 2.55 times, respectively. It is shown that the method of early detection of fires, which is based on the detection of significant differences in sample dispersions of data from the relevant general populations
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基于危险参数采样分散的早期点火检测方法
研究对象是材料着火时气体环境危险参数的选择性分散。研究的实际意义在于利用气体环境危险参数在材料不着火和着火间隔时间内的样本分散差异来检测着火情况。根据气体环境中任意危险参数的电流测量值的样本散布情况(对应于可靠的无火和有火的一般人群),对检测场所火灾的方法进行了理论论证。在给定的显著性水平下,该方法确定了无偏统一的最强火灾探测规则。这样就可以确定在给定的显著性水平下,样本方差的差异有多大,是由着火引起的还是随机因素。为了验证所提出的方法,我们进行了实验室实验。实验证明,点火对监测一氧化碳浓度、烟雾密度和实验舱气态环境温度的相应时间间隔内样本分散度差异值的影响是不同的,并取决于点火材料的类型。同时,在观察所有研究材料的烟雾密度时,样品分散度的最小差值是其特征。然而,在观察烟密度时,当阈值分别超过 9.01、5.31、2.13 和 2.55 倍时,就会对酒精、纸张、木材和纺织品的点火进行早期检测。研究表明,火灾早期检测方法的基础是检测相关普通人群数据样本离散度的显著差异
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来源期刊
Eastern-European Journal of Enterprise Technologies
Eastern-European Journal of Enterprise Technologies Mathematics-Applied Mathematics
CiteScore
2.00
自引率
0.00%
发文量
369
审稿时长
6 weeks
期刊介绍: Terminology used in the title of the "East European Journal of Enterprise Technologies" - "enterprise technologies" should be read as "industrial technologies". "Eastern-European Journal of Enterprise Technologies" publishes all those best ideas from the science, which can be introduced in the industry. Since, obtaining the high-quality, competitive industrial products is based on introducing high technologies from various independent spheres of scientific researches, but united by a common end result - a finished high-technology product. Among these scientific spheres, there are engineering, power engineering and energy saving, technologies of inorganic and organic substances and materials science, information technologies and control systems. Publishing scientific papers in these directions are the main development "vectors" of the "Eastern-European Journal of Enterprise Technologies". Since, these are those directions of scientific researches, the results of which can be directly used in modern industrial production: space and aircraft industry, instrument-making industry, mechanical engineering, power engineering, chemical industry and metallurgy.
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