FIRE DETECTION USING TIME-SERIES ANALYSIS OF SOURCE TEMPERATURES

The evaluation of a near-infrared fire detector using standard test fi res is presented. The spectral radiation intensities incident on the f ire detector are continuously measured at two near-infrared wavelength s (900 and 1000 nm), and a time series of apparent source temperatures is obtained from these measurements. The power spectral density and t he probability density function of the apparent source temperatures ar e sufficient to determine the presence of a fire in the vicinity of th e detector. The detector can also indicate the presence of a fire in a n adjoining room from the radiation which is incident on it due to ref lections from common building materials. (C) 1998 Published by Elsevie r Science Ltd.