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Development of a 3D Light Scattering Sensor for Online Characterization of Aerosol Particles
Author(s) -
Pitz Michael,
Hellmann Albert,
Ripperger Siegfried,
Antonyuk Sergiy
Publication year - 2018
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201800045
Subject(s) - characterization (materials science) , materials science , light scattering , optics , particle (ecology) , aerosol , fractal dimension , scattering , dynamic light scattering , microscope , nanotechnology , nanoparticle , fractal , physics , mathematical analysis , oceanography , mathematics , geology , meteorology
The measurement of the shape, surface, and aggregate structure of solid particles on the micro and nanoscale become even more important for the design and characterization of products and processes. Currently, these properties are determined offline via imaging techniques such as scanning electron microscope or transmission electron microscope. This requires a suitable sampling, and the subsequent workup and analysis step is very costly and time consuming. Therefore, a suitable measurement technology is required, which is able to capture the properties online. In this work, a novel sensor system based on the principle of elastic light scattering of particles in the gas phase is developed and described. Here, the single particles of an aerosol stream are illuminated by monochromatic laser light and the scattered light intensity is measured with high temporal resolution at several points around the particles. The measured data is evaluated and used to obtain certain particle properties such as size, sphericity, and fractal dimension. The modular setup of the sensor is suitable for the adaption to different measuring tasks. In addition to the detailed description of the design of the developed system, first measurements on polystyrene latex monospheres are presented.