Fire alarm system

Details Fire alarm system Fire alarm system

1985-07-29

1989-11-28

Lall, P. S.

Boots, shoes, and leggings

340588, 340589, 340628, 340577, 364185, G08B 1700

Patent

active

048842222

ABSTRACT:
A fire alarm system of the present invention is adapted to compute an approximation equation based on the detection data from a detector or detectors such about a smoke density, a temperature, a gas concentration, etc. and predictively determine a fire based on the approximation equation. The system including computing section for computing an approximation equation approximating a change in the physical phenomenon related to the occurrence of a fire which is output from the detector or detectors, sequentially sampled and stored and for computing a future value of the phenomenon estimated from the approximation by using a predetermined number of the data stored in a storing section. The future vale is compared with a data value preliminarily set in association with the fire alarming and an alarm is generated when the relation therebetween is not within a predetermined range.

REFERENCES:
patent: 3728615 (1973-04-01), Hill et al.
patent: 4184205 (1980-01-01), Morrow
patent: 4254414 (1981-03-01), Street et al.
patent: 4316179 (1982-02-01), Bliss et al.
patent: 4423326 (1983-12-01), Ball
patent: 4459583 (1984-07-01), van der Walt et al.
patent: 4472715 (1984-09-01), Kern et al.
patent: 4581604 (1986-04-01), Kimura et al.
patent: 4796205 (1989-01-01), Ishii et al.
patent: 4803469 (1989-02-01), Matsushita

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