Evaluation of scattered light signals in an optical alarm system and evaluating both a weighted smoke density signal and a weighted dust/steam density signal

摘要

The invention relates to a method for evaluating two scattered light signals (IR, BL) in an optical alarm system (1) operating according to the scattered light principle. The particles with light, which are to be detected, are irradiated in a first and second wavelength range. The light scattered by the particles is converted into a first and a second non-standardized scattered light signal (IR