Development of a strategy for using the bispectrum of dangerous parameters to determine an informative signs of detection of materials inflammation

The object of the study is an informative sign of detecting ignition of materials in premises based on the assessment of the bispectrum of a dangerous parameter of the gas environment. The problem is to develop a strategy for using the bispectrum to determine an informative sign of detecting ignition of materials based on the observation of an arbitrary dangerous parameter of the gas environment in the premises. It is proposed to determine a new informative sign by a measure of the average degree of "order" for each frequency in the spectrum of dynamics of an arbitrary dangerous parameter of the gas environment at a fixed observation interval. The proposed informative sign was experimentally verified by studying the spectra of the average degree of “order” of the dynamics of the main dangerous parameters of the gas environment during the ignition of materials in a laboratory chamber. It was established that during the ignition of materials, the values of the average degree of “order” of the dynamics of temperature and carbon monoxide concentration for all studied frequencies of the spectrum are significantly reduced and do not exceed the value of 0.1. This indicates a loss of the average degree of “order” for all studied frequencies of the spectrum of dynamics of temperature and carbon monoxide concentration. At the same time, the value of the average degree of “order” of the dynamics of the specific optical density of smoke with respect to the studied frequencies does not change significantly. The obtained results are useful from a theoretical point of view by using the bispectrum for an informative sign of ignition and a measure of the average degree of “order” for an arbitrary dangerous parameter of the gas environment. The practical significance lies in the possibility of further improvement of existing fire protection of objects in order to prevent fires.