FIELD: physics, measurement.
SUBSTANCE: method of bulk solids mixture evaluation includes sampling from mixer, pressing of tablets, digital imaging of tablets, and evaluation of key component concentration and mixture heterogeneity. Calibration tablets with known concentration of key component are prepared. Digital images thereof are used to observe calibration brightness dependence of key component concentration. Further digital image of analysed tablets are broken up into cells of the same area to evaluate brightness of each cell. Then arithmetical mean of brightness in all cells is calculated. Calibration dependences are used to evaluate key component concentration in tablet. Heterogeneity coefficient of mixture sample is calculated by formula: 
, where n is number of cells; Ci is brightness of i-th cell; 
is arithmetical mean of brightness in all n cells.
EFFECT: most complete data accessing of bulk solids mixture quality, i.e. components test of mixtures and heterogeneity (variation coefficient) of their distributions.
2 dwg
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