Smoke detection apparatus

Details Smoke detection apparatus Smoke detection apparatus

G - Physics

08

B

340/155, 340/140

G08B 17/107 (2006.01)

Patent

CA 1277005

-1- ABSTRACT OF THE DISCLOSUE There is disclosed a control device for use with a light sensing air pollution detection apparatus including an amplifier having pulse amplifiers producing an output pulse of high amplitude, an active peak-detector of high accuracy and linearity over a wide range and an active sample-and-hold circuit associated with a summing amplifier or a microprocessor for detecting and storing the peak amplitude of the pulse said apparatus adapted to receive and amplify signals received from a solid-state photo-cell subjected to a flashing light source the control device including current measuring apparatus such as a moving-coil meter or an LED segmented bargraph display to indicate air pollution and programming pins for tapping off each individual bargraph segment to achieve plural preset alarm thresholds. The flashing light source is monitored to compensate or adjust for variations in flash intensity the signal from the monitor circuit and the detector circuit being subjected to a divider circuit.

465818

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