基于PIN型光敏元件的粉尘传感器设计

Design of Powder Sensor Based on PIN-model Photosensitive Component

设计了一种用于粉尘浓度和分散度快速测定的光电检测传感器,介绍了光散射式粉尘颗粒传感器的工作原理以及相关的光学系统,并对PIN型光敏元件与前置放大电路的工作原理进行了分析。这种新型传感器具有体积小,信噪比高,准确度高,功耗低等优点。粉尘重量浓度检测范围:0～10mg/m3至0～500mg/m3,粒径分散度:<2～5,5～10,>10μm。

A type of photoelectricity detection sensor that is used to rapidly measure dust concentration and dispersity of powder was designed.Working principle about light dispersion sensor on powder granule and relevant optical system was introduced.An analysis upon working principle about PIN-model photosensitive component and preamplifier was made.This new type of sensor has advantages as follow：small size,high SNR,high accuracy,low power consumption.The detection scope of weight and concentration of powder：0～10mg/stere to 0～500mg/stere,dispersion：〈2～5,5～10,〉10 micron.