Method of detecting a fire of open uncontrolled flames
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United States of America Patent
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Sep 12, 1989
Grant Date -
N/A
app pub date -
Apr 26, 1988
filing date -
Apr 26, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of detecting fires utilizing its flicker frequency spectrum provides a standard theoretical flicker frequency spectrum which is compared to the real time spectrum over a 2 second time period. The comparison includes whether or not the real time fire spectrum deviates from the idealized fire spectrum by a minimum amount and has further discrimination against false fire signals, including the extent of time of the real time spectrum is outside a predetermined window and a limit on maximum deviations.
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