A dust concentration measuring device and method
A dust concentration and measurement device technology, which is applied in the direction of measurement devices, suspension and porous material analysis, particle suspension analysis, etc., can solve the problems of concentration measurement error, system complexity, large difference between light intensity and scattered light intensity, etc. , to achieve fast response, high sensitivity, simple and compact optical path system
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[0053] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.
[0054] The dust concentration measuring device of the present invention can simultaneously measure the dust concentration of micron, submicron and nanometer, its structure see figure 1 , including: a laser light source 1, a spatial filter 2, a sample cell 3, a collection lens 4, a stepped neutral density filter 5, and an area array digital camera 6 arranged in sequence according to light transmission, that is, the direction of the light path
[0055] The laser light source is generally emitted by the laser 1. The stray light is filtered out by the spatial filter 2 and collimated to obtain a pure Gaussian parallel beam. The parallel laser beam enters the measurement area and passes through the dust mixed fluid in the sample cell 3 to generate The scattered light and the transmitted light are focused on the focal plane through the collectin...
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