Fire detection method and apparatus using overlapping spectral b

Details Fire detection method and apparatus using overlapping spectral b Fire detection method and apparatus using overlapping spectral b

1997-05-07

1999-11-30

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

25033915, G08B 1712

Patent

active

059950080

ABSTRACT:
An optical fire detector employs two or more sensors operating a different spectral bands. The spectral bands are selected to have approximately coincident cut-off wavelengths in order to make the detector's ability to positively identify a fire more uniform over its field of view. The use of three overlapping spectral bands provides the detector with enhanced detection capabilities for large, hot fires that behave like black body radiators.

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