[00146988]双波长光学实时气溶胶粒子粒径检测装置

本发明公开了一种双波长光学实时气溶胶粒子粒径测量装置,包括单粒子聚焦气路、两个光强度检测单元、两个光场分布检测单元、散射腔体、微机控制单元和电源供电系统。本发明减少了粒子折射率和环境湿度等条件对光散射法检测粒子光学等效粒径的影响,能够提高粒径检测灵敏度和准确度;采用侧前向散射光场分布检测单元推算粒子折射率,增强粒子粒径检测准确性;可与其他气溶胶粒子检测技术结合,提高检测准确性。 | A real-time dual-wavelength optical aerosol particle size measuring device is disclosed. The device comprises a single-particle focusing gas path, two light intensity detecting units, two optical field distribution detecting units, a scattering cavity, a microcomputer control unit and a power supply system. The device reduces influences of the particle refractive index, environment humidity, and other conditions on measurement of the particle optical-equivalent grain size by a light scattering method, and can improve particle size measurement sensitivity and accuracy. The particle refractive index is calculated by adopting a front side scattering optical field distribution detecting unit, thus improving particle size measurement accuracy. The device can be combined with other aerosol particle measuring techniques to improve measurement accuracy。