MULTI-SIGNATURE FIRE DETECTOR

摘要

A multi-signature fire detection method and apparatus, utilizing first (1) a nd second (2) detectors for detecting first and second signatures. The first (1 ) detector outputs a first signal (A) indicative of the first detected fire signature, and the second detector (2) outputs a second signal (B) indicativ e a second detected fire signature. A signal processor (3) is provided for combining the first (A) and second (B) signals using a number of correlation s, wherein outputs of the first (1) and second (2) detector means are coupled t o the signal processor (3), and the signal processor (3) compares and combines the first (A) and second (B) signals to a first predetermined reference valu e (303), and outputs a fire condition signal if a combination of the first (A) and second (B) signals exceeds the predetermined reference value (303).