Fire detection method and fire detection apparatus

Details Fire detection method and fire detection apparatus Fire detection method and fire detection apparatus

1998-03-12

2000-08-29

Tong, Nina

Communications: electrical

Condition responsive indicating system

Specific condition

511522, 511632, G08B 1712

Patent

active

061115126

ABSTRACT:
Novel fire detection method and apparatus for positively detecting a fire in the stage of initial smoldering fire or smokeless burning with a high sensitivity. A sensor apparatus disposed in an area i makes gas detection and gas recognition using an existing pattern recognition method such as principal component analysis. If no gas is detected, flag f.sub.i =0 is set. If a gas is detected and recognized as a water vapor, f.sub.i =1 is set. If it is not recognized as a water vapor, f.sub.i =0 is set. Monitoring N areas as above, J=f.sub.1 +f.sub.2 + . . . +f.sub.N is calculated, if 0<J<N, an area of f.sub.i =1 is recognized as highly possible to be a fire. When J=0 or J=N, it is recognized as a non-fire since it is highly possible as due to detection of a gas other than a water vapor such as alcohol or an ordinary humidity change.

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