Optical flame and explosion detection system and method

Details Optical flame and explosion detection system and method Optical flame and explosion detection system and method

1978-11-01

1980-09-02

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250340, G01J 100

Patent

active

042208572

ABSTRACT:
Optical flame and explosion detection system having first and second channels with each of the channels being responsive to different combustion products and detecting radiation from the combustion products and converting the radiation into electrical signals. A filter is provided in each of the channels to limit the spectral response to a narrow band. The levels of the radiation are ascertained by level detectors which provide first and second signals when predetermined signal levels are reached in the first and second channels. A ratio of the two electrical signals from the first and second channels is ascertained. When a predetermined level is reached from the ratio of the electrical signals and also for the individual signals, an output signal is produced which can be utilized in actuating alarms and other devices.

REFERENCES:
patent: 3665440 (1972-05-01), McMenamin
patent: 3742474 (1973-06-01), Muller
patent: 3825754 (1974-07-01), Cinzori et al.
patent: 3931521 (1976-01-01), Cinzori
patent: 4160163 (1979-07-01), Nakauchi
Linford, R. M. F. and Billow, C. F., "Optical Emission Properties of Aircraft Combustible Fluids", McDonnell Aircraft Company, technical report, AF APL-TR-7383, Aug. 1973.

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