摘要
散射光型光电感烟探测器的光电接收器输出信号,与光源辐射功率和波长、粒子浓度、粒径、散射角、散射体积和光敏元件的受光面积等有关。其粒径划分为瑞利散射区、米氏散射区、布里卡尔散射区。随着粒径增大,前向散射增大,侧向散射次之,后向散射减小。但无论粒径如何变化,前向散射信号总优于后向散射信号。相对于前向散射,后向散射的散射强度不如前向散射差别大。并据此设计散射光型光电感烟探测器。
The photoelectrical receiver output signal of scattering photoelectrical smoke detector was relevant to light source radiation power, wavelength, particle thickness, particle diameter, scattering angle, scattering volume and the light area of photosensitive unit, The particle diameter divided into Rayleigh scattering area, Mie scattering area, and Bulikaer scattering area. When particle diameter augmented, the forward direction scattering augmented, the sideways scattering augmented slowly, and the backward scattering minimized, No matter what the particle diameter changed, the forward direction scattering was better than the backward scattering signal. Compared with the forward scattering, the scattering intension difference of backward scattering was more less than the forward scattering. Finally, the scattering photoelectrical smoke detector was designed according to theoe.
出处
《兵工自动化》
2006年第9期79-80,85,共3页
Ordnance Industry Automation
关键词
光电感烟探测器
光电接收器
瑞利散射
米氏散射
散射角
Photoelectrical smoke detector
Photoelectrical receiver
Rayleigh scattering
Mie scattering
Scattering angle
