Abstract
The analysis of fire developmental process is given, which showed that there are seven stages of fire development, a set of phenomena (factors, signs) of fire risk condition, characterized by a set of defined parameters, corresponds to each stage. Observed that the registration of high staging factors (high ambient temperature, content of CO2, etc.) means the registration of actual low staging fire (thermal destruction of materials gases, fumes, etc.) - fire risk situation. It is shown that the decrease of registered factor staging leads to construction of fire preventive and diagnostic systems as the lower is registered stage, the more uncertain is connection between the fact of its detection and a fire. It is indicated that with development of electronic equipment the staging of fire situations factors used for detection is reducing in whole, and also it is noted that for each control object it is necessary to choose (identify) the optimal factor, in particular, in many ways the optimal factor for aircrafts are smokes and their TV image.
Highlights
Fire risk detection by monitoring of air quality parameters is widely used in equipment and depends on the character of the controlled object and its service conditions
Optical parameters of air quality allow estimating mediately air quality changes connected with signs indicative of development of the condition usually defined as signs of fire situation development
To the first stage is referred [1] the ingress of burning gases into the atmosphere of controlled room - due to the fault condition of gas main lines etc., fire stage (FS) registration is performed by means of gas sensors
Summary
Fire risk detection by monitoring of air quality parameters is widely used in equipment and depends on the character of the controlled object and its service conditions. Optical parameters of air quality allow estimating mediately air quality changes connected with signs indicative of development of the condition usually defined as signs of fire situation development. Low stages of F development can be determined as fire risk condition, a fire hazard situation, for various reasons such a state could not develop in a F. The second stage of F development is connected with temperature rise of substructure components’ surfaces of equipment and apparatus, increasing of infrared radiation intensity, entering of combinedcycle thermal degradation products of non-metallic: structural, insulating, decorative and other materials into the atmosphere. The third stage is associated with a further rise of warm-up temperatures of non-metallic materials and corresponding increase of flux densities of combined-cycle products of thermal
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