THRESHOLD PROCESSING METHOD FOR TEMPERATURE-SENSITIVE FIRE ALARM SYSTEM

摘要

Disclosed is a threshold processing method for a temperature-sensitive fire alarm system, comprising the following steps: S1, providing a temperature sensor in each area to be tested; S2, using the temperature sensor to measure a temperature, a corresponding position and a corresponding time of the area to be tested, and utilizing the temperature or a parameter derived from the above-mentioned three values to form a fire sensitive parameter S; S3, marking a fire sensitive parameter value, which can be reached within a limited time, of a minimum detectable fire in the area to be tested as S_Tmax, and defining S_Tmax as the upper limit of an alarm threshold; and in the area to be tested, under a normally running non-fire condition, marking a sum of a statistical result of a fire sensitive parameter caused by the noise of the temperature sensor and a statistical result of a fire sensitive parameter caused by events occurring in the area as S_Tmin, and defining S_Tmin as the lower limit of the alarm threshold; and S4, selecting one value between the upper limit of the alarm threshold and the lower limit of the alarm threshold as a fire alarm threshold to be employed practically. The threshold processing method has the advantages of reducing the rate of false alarms and the rate of alarm failure, providing an alarm timely and being high in reliability.