EXPERIMENTAL STUDIES OF THE FIRE DETECTOR’S TIME PARAMETERS DETERMINING PROCESS USING THE PULSE METHOD
Abstract
One of the most relevant methods to reduce losses from fires is to identify fire hazards. The most effective in this case is the early detection of fires using automatic fire protection systems and their timely localization. The performance of such systems is determined by the proper technical characteristics of fire detectors, which are the first link in any automatic fire protection system and its proper operation.
Ensuring the proper functioning of automatic fire protection systems, in particular primary information sensors - fire detectors - is an important component, as their work is aimed at detecting a fire at its initial stage. After all, early detection of fire hazards minimizes the risks to human life and health and reduces possible damage.
Among the types of fire detectors, thermal fire detectors are one of the most common. This is due to their simple design, low maintenance, and low cost.
Thermal fire detectors are effective in cases where the initial stage of the fire is expected to be significant with intense heat generation, where the smoke spread is difficult, and where the use of other types of detectors may lead to false alarms.
The performance of such systems is determined by the fire detectors’ main parameters perfection, which include the response time and time constant.
The main technical characteristics of thermal fire detectors are: rated operating temperature, operating time, and time constant. The time parameters of thermal fire detectors are interrelated. The time constant of a fire detector to its response time can be up to 20% at the rate of the ambient temperature change 0,5 С0с-1.
