A process and system for flame detection includes a microprocessor-controlled
detector
with a first sensor for sensing temporal energy in a first optical frequency range,
and a second sensor for sensing temporal energy in a second optical frequency range.
The temporal energy sensed in the respective first and second optical frequency
ranges are transformed into respective first and second spectra of frequency components.
A compensated spectrum of frequency components is generated by performing a frequency
bin subtraction of the first and second spectra of frequency components. The compensated
spectrum represents the energy emitted from the environment with energy emitted
from false alarm sources. An average amplitude and centroid of the compensated
spectrum are obtained and used to determine if a monitored phenomenon represents
an unwanted fire situation. The compensated spectrum can be compared to reference
compensated spectra of frequency components generated from known unwanted fire
sources and known false alarm sources.
