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Method for measuring grain size distribution of granules

A measurement method, particle size technology, applied in particle and sedimentation analysis, measuring device, particle size analysis, etc., can solve the problem that the particle size distribution measurement method cannot fully and flexibly reflect the particle size distribution of particle samples, and achieve Rich data results, wide range of analysis objects, and good reproducibility

Inactive Publication Date: 2005-11-16
TSINGHUA UNIV
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Problems solved by technology

[0003] In order to solve the problem that the existing commonly used particle size distribution measurement methods cannot fully and flexibly reflect the particle size distribution of particle samples, the present invention provides a particle size distribution measurement method based on the combination of digital photography and computer image processing , the circularity, particle number and particle size distribution results of particle samples can be obtained; for spherical or nearly spherical particle samples, the volume distribution results of particle size can be obtained; for spherical or nearly spherical particle samples with uniform texture, The volume distribution result of the particle size is the weight distribution result

Method used

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  • Method for measuring grain size distribution of granules
  • Method for measuring grain size distribution of granules
  • Method for measuring grain size distribution of granules

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings. figure 1 Shown is a set of measuring devices which can implement the measuring method according to the invention. Such as figure 1 As shown, the device includes an image capture unit and an image analysis unit, wherein the image capture unit includes a size calibration object 1, a glass petri dish 2, a white backlight plate 3, an operating table 4, an elevating operating rod 5, an elevating slider 6 and a digital camera 7. The image analysis unit includes a data transmission line 8 and a microcomputer 9 storing image analysis programs.

[0016] The glass petri dish 2 used as the sample tank contains the dispersed particle samples to be tested and the size calibration object 1, the glass petri dish 2 is placed on the white backlight plate 3, and the white backlight plate 3 is placed on the operating table with the lifting operation rod 5 4, the digital camera 7 is fixed...

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Abstract

A method for measuring particle diameter distribution includes placing particle samples in glass sample tank set on back light plate uniformly with particle sample number of 50 - 500, placing size calibration object in the tank, using digital camera to shoot image of said particle sample, guiding image to computer for processing the image and obtaining roundness and diameter of each particle, outputting particle sample distribution results of number, volume and weight according to division of particle diameter.

Description

technical field [0001] The invention relates to a method for measuring particle size distribution, especially suitable for the measurement and analysis of particle size distribution of spherical or nearly spherical particles with a particle size of 0.1 to 5 mm, such as anaerobic granular sludge, granular activated carbon or ceramsite The invention belongs to the technical field of particle sample detection. Background technique [0002] In the experimental research and production practice in many fields such as chemical industry, materials, environmental protection, etc., the measurement and analysis of particle size distribution is of great significance. The particle diameter of spherical particles or the equivalent particle diameter of nearly spherical particles (the equivalent circle diameter of the projected area of ​​particles) is an important parameter reflecting the properties of particles. The methods for measuring particle size distribution mainly include sedimenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
Inventor 左剑恶李建平
Owner TSINGHUA UNIV
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