Multi-angle Scattering Characteristic of test Fire Smoke and Typical Interference Aerosol

This paper describes the experiment platform for studying the scattering characteristic of fire smoke and interference aerosols, which was developed independently by the Shenyang Fire Research Institute of the Ministry of Public Security of China. This paper also introduces the constitution, work principle and key technologies of the platform. By real experiment, the ability of this platform on studying the scattering characteristic of fire smoke and interference aerosol was proved. This paper then presents the scattering intensity distribution data yielded out of that the laser (635nm) was scattered by four test fires SH1-SH4 conforming to Chinese National Standard GB 4715, and by typical interference aerosols, such as loess dust, water mist and tobacco burning smoke, at angles of 30o, 90o and 150o. The analysis in the data shows that the scattering intensity distribution of fire smoke and interference aerosol demonstrated a stable characterized law, and by the difference of this characterized parameter, each fire smoke and typical interference aerosol can be identified. Thus, multi-angle detection is an effective way to resolve broadspectrum response proportionality and false alarm rejection for scatter type photo-electric detectors, and a promising developingdirection of intelligent photo-electric smoke detection.