FIELD: measurement technology.
SUBSTANCE: use to measure relative content of fine particles. Proposed device comprises: lighting unit, which illuminates material in form of large pieces; spectrometer, which performs spectral analysis of light reflected from material in form of large pieces, to measure spectral reflection coefficient; and an arithmetic device which selects the characteristic value based on the spectral reflection coefficient measured by the spectrometer, and calculates the relative content of fine particles using the extracted characteristic value.
EFFECT: enabling measurement of relative content of fine particles adhered to material in form of large pieces in real time with high accuracy.
8 cl, 6 dwg
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