Fire detection system with IR and UV ratio detector

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

250372, 340578, G01J 100

Patent

active

044554877

ABSTRACT:
An automatic fire detection system characterized by an extremely low incidence of false alarms utilizes two detection channels, one fed by an infrared (IR) detector and the other by an ultraviolet (UV) detector. Signal processing electronics in each channel produce a normalized output signal proportional to the power of incident IR and UV radiation within specific bandwidths. The system features a ratio detector that repeatedly forms a ratio of the normalized IR and UV inputs and compares the ratio to a known range of values for this ratio that are characteristic of a fire. A discriminator connected to the output of the ratio detector generates a fire alarm signal only if the majority of these ratio comparisons are fire-indicating. The system also includes a feedback loop in the IR processing channel that automatically adjusts the output of the channel to compensate for time-varying background IR radiation such as sunlight.

REFERENCES:
patent: Re29143 (1977-02-01), Bianchini
patent: 3122638 (1964-02-01), Steele et al.
patent: 3283154 (1966-11-01), Giuffrida et al.
patent: 3342995 (1967-09-01), Axmark
patent: 3544792 (1970-12-01), Giltaire
patent: 3665440 (1972-05-01), McMenamin
patent: 3739365 (1973-06-01), Muller
patent: 3820097 (1974-06-01), Larson
patent: 3825754 (1974-07-01), Cinzori et al.
patent: 3931521 (1976-01-01), Cinzori
patent: 3986184 (1976-10-01), Castanino et al.
patent: 4017884 (1977-04-01), Facchini et al.
patent: 4039844 (1977-08-01), MacDonald
patent: 4065758 (1977-12-01), Barbier et al.
patent: 4157506 (1979-06-01), Spencer
patent: 4199682 (1980-04-01), Spector et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Fire detection system with IR and UV ratio detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fire detection system with IR and UV ratio detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fire detection system with IR and UV ratio detector will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-415131

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.