FIELD: physics.
SUBSTANCE: smoke sensor contains a light source with the power unit and a reflector optically coupled to the light source, a support receiving channel optically coupled to the light source, the output of which is connected to the input of the power supply, a measuring receiving channel optically coupled to the light source through the reflector. The smoke presence in the measuring channel is determined by the exceeding of the threshold value Δ, the difference between the current signal value Φc of the measuring channel and the dynamic signal value F0, where 
, *Φ0 - the initial signal level; Φi - the instantaneous signal value; 
, i - the sample number; n - the number of samples for averaging the dynamic signal level; k - the number of samples for averaging the current signal level.
EFFECT: high measurement accuracy.
1 dwg
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