LED光源光学粒子计数器的研制

Development of optical particle counter of LED lamp-house

为了提高光学粒子计数器的测量性能,克服白炽灯和激光作光源带来的缺点,研制了一台光学粒子计数器。基于Mie散射原理测量粒子的粒径,以发光强度高、发光波长宽的LED为光源,具有白炽灯和激光作光源无法达到的使用寿命长和响应曲线单调的优点。与浊度计测量结果对比表明:该仪器的测量误差在15%以内,测量结果合理。由于该仪器光源使用寿命是白炽灯的60倍,可以根据需要对测量粒径任意分道,所以该仪器适用于测量和研究大气气溶胶粒子谱分布。

To improve the measuring performance of the Optical Particle Counter(OPC),a new OPC(DLJ-06 OPC) with resonant channels and long-use periods was introduced.The DLJ-06 OPC takes a Light Emitting Diode(LED) as its light source and measures the particle diameter based on Mie scattering,which has an advantage over a laser source in use lifetime and monotonous curve.By comparion with a Integrating Nephelometer(designed by TSI)in measuring results,it shows that the size distributions measured by DLJ-06 OPC are rea...