The counting and grading of fine particles is of special importance in production and scientific research. One of the unique advantages of the laser diffraction method compared to the currently used methods is the most notable and attractive one. Non-contact, because the information is generated and collected almost simultaneously, it is especially suitable for studying the size distribution of dynamic particle groups and real-time control of powder production lines. The measurement of non-contact property in turn makes this method unconstrained by the physical and chemical properties of the particles and does not cause any interference with the particles, thus making it adaptable to the surface-polarity plant. For fine seeds, you can use a particle counter to count, and the results are accurate and reliable.
Here, the key is to fully separate the particles and not cover each other. Dispersion has a great influence on the measurement results. If the dispersion is not sufficient, the measured results are large. In order to measure the radial intensity spectrum defined herein, a special photodetector is used. The detector structure we use is a series of concentric rings arranged in a row. The center of the Fourier spectrum of the sample to be measured coincides with the center of the circle of the detector, so the measured light energy of each ring is divided by the area of ​​the ring, and the radial intensity spectrum at the ring is obtained. The value of x and 10,000 - is the average radius of the jth detection ring.
For particle counter data processing, we use curve fitting. From the perspective of the fit of the two curves in Figure 2, the measurement results truly reflect the situation of the tested particle groups, which effectively illustrates the feasibility of this method. From the above results and analysis, it is known that the use of laser diffractometry to count and classify small particles is completely feasible, and is particularly suitable for particles distributed in the range of several micrometers to several micrometers. After other technologies are perfect, the dispersion of the sample becomes a critical factor.
Here, the key is to fully separate the particles and not cover each other. Dispersion has a great influence on the measurement results. If the dispersion is not sufficient, the measured results are large. In order to measure the radial intensity spectrum defined herein, a special photodetector is used. The detector structure we use is a series of concentric rings arranged in a row. The center of the Fourier spectrum of the sample to be measured coincides with the center of the circle of the detector, so the measured light energy of each ring is divided by the area of ​​the ring, and the radial intensity spectrum at the ring is obtained. The value of x and 10,000 - is the average radius of the jth detection ring.
For particle counter data processing, we use curve fitting. From the perspective of the fit of the two curves in Figure 2, the measurement results truly reflect the situation of the tested particle groups, which effectively illustrates the feasibility of this method. From the above results and analysis, it is known that the use of laser diffractometry to count and classify small particles is completely feasible, and is particularly suitable for particles distributed in the range of several micrometers to several micrometers. After other technologies are perfect, the dispersion of the sample becomes a critical factor.
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