Fire identification and discrimination method and apparatus

Details Fire identification and discrimination method and apparatus Fire identification and discrimination method and apparatus

1985-12-23

1987-05-19

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250381, 250573, G08B 1710, G01N 2302

Patent

active

046671064

ABSTRACT:
In a method and apparatus for determining the fuel of a fire, an ionization detector is positioned to detect the ionization level in the fire gases. The natural logarithm of the ratio of the ambient ionization current when there is no fire to the change in ionization current from the ambient level is multiplied times a second characteristic, which may be the optical density, the change in carbon monoxide concentration from ambient, or the change in carbon dioxide concentration from ambient. The resulting product of this multiplication will be a value indicating the fuel being consumed in the fire. A chart recorder is connected to record the product of the multiplication.

REFERENCES:
patent: 3922656 (1975-11-01), Harvath et al.
patent: 4069018 (1978-01-01), Karna et al.
patent: 4288790 (1981-09-01), Schnell
patent: 4405919 (1983-09-01), Scheidweiler
Armtec Brochure, "Omniguard" fire detectors, 1983.
Fire Journal, "The Technology of Infrared and Ultraviolet Detection", Jul. 1983, by Ron Hemond and Roger Wendt.

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