PM2.5激光散射法传感器校准研究

PM2.5 Calibration Research of Laser Scattering Sensor

PM2.5测量是否准确与使用的测量方法有关,使用β射线法和微量振荡天平法的设备较多且认可度很高,而使用光散射法的设备认可度较低,主要原因是光散射法易受环境因素影响导致测量结果不准确。以PMS3003型激光测量传感器为研究对象,通过分析采样设备和对标设备的测量结果,发现二者之间存在线性关系,并且此线性关系与空气湿度因素有关。通过解耦与空气湿度的依赖关系,使测量值接近标准值,降低了测量误差,提高了光散射法测量的准确性。

Whether the PM2.5 measurement is accurate or not is related to the measurement method used, more equipment using Beta-ray method and TEOM method are highly recognized, and the recognition of light scattering method is low, and the main reason is that the light scattering method is susceptible to environmental factors, which results in inaccurate result. The research of PMS3003 laser measurement sensor is by analyzing the measuring results of the sampling equipment and the calibration equipment, we find that there is a linear relationship between the two objects, and the linear relation is related to the air humidity factor. The measurement value is close to the standard value and the measurement error is reduced by decoupling and the air humidity dependence,as a result, accuracy of light scattering method is improved.