粒度测量,特别是超细粉的粒度测量在粉体技术方面逐步引起人们的普遍重视。传统方法受到测量速度和精度的限制。文中提出了利用激光散射的原理测量粒度大小分布的原理和结构。重点讨论了单片机系统的软硬件设计。所研制的粒度分析仪具有便携,易操作,测量速度快,测量准确等优点。在粉体加工等领域得到广泛地应用 Particle size measurement, especially the particle size measurement of ultra-fine powder, has gradually attracted people’s attention in powder technology. Traditional methods are limited by the speed and accuracy of the measurement. In this paper, the principle and structure of particle size distribution using laser scattering principle are proposed. Focus on the SCM system hardware and software design. Developed by the particle size analyzer is portable, easy to operate, fast measurement, measurement accuracy and so on. In powder processing and other fields have been widely used