FIRE/NON-FIRE DETERMINATION DEVICE AND FIRE/NON-FIRE DETERMINATION METHOD, AND FIRE ALARM UNIT

摘要

PROBLEM TO BE SOLVED: To provide a fire/non-fire determination device and a fire/non-fire determination method capable of effectively determining between an actual fire and a non-fire especially when smoke emission suddenly occurs, and a fire alarm unit using the fire/non-fire determination device.;SOLUTION: The fire/non-fire determination device includes a smoke sensor 3 for detecting a smoke density, an area calculation means 2 for calculating a time integral value of smoke density as a whole area S' based on multiple pieces of measured data continuing to a first and second measured data including the first measured data that exceeds set density for determining smoke rise at a detection time point when the smoke density detected at every prescribed detection timing by the smoke sensor 3 exceeds the set density for determining smoke rise and the second measured data that becomes less than set density for determining smoke rise and that is detected at the detection timing immediately before the detection time point, and determines whether it is a fire or not, based on the whole area S' calculated by the area calculation means 2.;COPYRIGHT: (C)2009,JPO&INPIT