DEVELOPMENT OF A METHOD FOR EARLY DETECTION OF WOOD FIRE BASED ON CURRENT SELECTIVE SPREADING OF HAZARDOUS PARAMETERS OF THE GAS ENVIRONMENT

Abstract

The object of the study is the current selective dispersion of arbitrary hazardous parameters of the gas environment during wood ignition. A theoretical justification of the method of rapid fire detection based on significant variations of the current difference of selective dispersions of the measured arbitrary hazardous parameter of the gas environment has been carried out. In this case, the significance of the current difference of selective dispersions allows detecting the occurrence of wood ignition in real time when an arbitrary hazardous gas environment parameter is observed. Proposed method of rapid wood ignition detection allows to establish significance level of current variation of selective dispersion of measured hazardous gas environment parameters for provision of maximum rate of wood ignition detection. Laboratory experiment was conducted for verification of proposed method. Verification has proven the validity of the method. It was found that differences of selective dispersions of hazardous gas environment parameters correspond to general conditions of reliable absence and occurrence of fire. Proposed method’ verification results have shown that at given level of significance method allows to find current wood ignitions using significant variations of selective dispersions of hazardous parameters of gas environment. It is found that the most sensitive parameters for wood ignition detection are CO concentration and gas environment temperature. Maximum speed of CO concentration increase at wood ignition is equal to 6.4 ррm2. Temperature increase speed is equal approximately to 0.25°C/s. Practical value of investigation is in application of variations of selective dispersion of hazardous gas environment parameters for real-time wood ignition detection.