中文摘要：

为了减小和防治灰霾天气对人们生活和健康的不利影响,对灰霾检测设备进行了研究,提出了一种PM 2.5检测传感器设计。根据光电传感器原理,采用对射型检测方式,将波长为650nm、功率为10mW的半导体激光器作为光源,使用具有内增益、灵敏度好的雪崩光电二极管作为接收器,经过由I/V转换、电压放大和具有低偏压差、低温度漂移、高性能电压跟随器构成的调理电路处理后,完成对颗粒物检测传感器设计。实验结果表明：该传感器测量准确、响应快、误差小,为准确测量颗粒物的浓度提供了硬件基础。

英文摘要：

In order to reduce and prevent effects of haze weather on people＇s life and health,haze detecting equipment is studied,propose a design of PM 2.5 detecting sensor.This design according to principle of photoelectric sensor,uses correlation type detection way use semiconductor laser,with wavelength of 650 nm, power of 10 mW as light source,use avalanche photodiode with the gain,good sensitivity as receiver.After the processing of conditioning circuit that is composed by the I / V conversion,voltage amplifier and voltage follower which has low bias voltage,low temperature drift and high performance voltage follower,to complete design of particle detecting sensor.Experimental results show that the sensor is accurate,fast response,small error and provide a hardware foundation for accurately measure concentration of particulate matter.