Flame detector

Details Flame detector Flame detector

1986-01-27

1988-06-07

Lall, Parshotam S.

Boots, shoes, and leggings

250340, 169 61, 340578, G01J 100, G08B 1712, G08B 2100

Patent

active

047501421

ABSTRACT:
A flame detector comprising a flame sensor, a storing section for storing a predetermined reference value, a comparing section for comparing a value of a signal from the flame sensor which changes in amplitude corresponding to a change in flickering of flames with said reference value and adapted to detect flames when the value of said signal exceeds the reference value, and a flame determining section which comprises a computing section for computing a ratio of an amplitude value of a minus change component to an amplitude value of a plus change component of changes in flickering of flames. The storing section stores a preset first threshold value and a preset second threshold value higher than said first threshold value, and the flame determining section signifies the presence of flames is when the ratio of the amplitude values of the signals is larger than the first threshold value and lower than the second threshold value.

REFERENCES:
patent: 4206454 (1980-06-01), Schapira
patent: 4220857 (1980-09-01), Bright
patent: 4423326 (1983-12-01), Ball
patent: 4553031 (1985-11-01), Cholin et al.

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