Light scattering-based monodisperse aerosol particle size and concentration measuring device
A concentration measurement, monodisperse technology, applied in measurement devices, particle size analysis, particle suspension analysis, etc., can solve the problem that the particle size and concentration of monodisperse aerosol cannot be quickly detected at the same time, and achieve a simple and reasonable measurement device and a large measurement range. , the effect of low cost
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[0017] Such as figure 1 and 2 As shown, a monodisperse aerosol particle size and concentration measurement device based on light scattering, which includes a laser 1, an optical attenuator 2, a beam expander 2, a first diaphragm 4, a cylindrical mirror 5, a scattering cavity 6, Data acquisition card 7 and computer 8. In the figure, the thin solid line indicates the optical path and the arrow indicates the direction of light propagation; the double-dot dash line indicates the air path, and the arrow indicates the airflow direction; the dotted line indicates the electrical connection line. Laser 1 uses a 632nm He-N2 laser with a power of about 20mW, and the emitted beam diameter is 1mm collimated beam. The first diaphragm 4 is an aperture diaphragm, and the aperture of the diaphragm is 3 mm. The focus of the cylindrical mirror 5 is located at the center of the photosensitive area. The light beam emitted by the first aperture 4 passes through the cylindrical mirror 5 and becom...
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