METHOD OF DETERMINING COLOUR GROUPS OF FIBRE LEAVES IN FLAX STOCK Russian patent published in 2009 - IPC D01B1/00 G01N33/36 

FIELD: physics.

SUBSTANCE: proposed method of determining colour groups in fibre layers involves determination of standard colour coordinates X_f, Y_f, Z_f and their mean-square deviation σ_Xf, σ_Yf, σ_Zf, on a sample of the fibre on its length. Differences Δ_I , are calculated, between values of standard colour coordinates of the fibre samples X_f, Y_f, Z_f and values of sample standard colour coordinates of the fibre X_s, Y_s, Z_s (Δ_X=X_f-X_s; Δ_Y=Y_f-Y_s; ∆_Z=Z_f-Z_s), as well as differences Δ_σi, between values of mean-square deviation of standard colour coordinates of the sample of fibre σ_Xf, σ_Yf, σ_Xf , and mean-square deviation of sample standard colour coordinates of the fibre σ_Xf, σ_Yf, σ_Zf ((Δ_σX=σ_Xf-σ_Xs; Δ_σY=σ_Yf-σ_Ys; Δ_σZ =σ_Zf-σ_Zs). After that the sum of the calculated differences Σ(Δ_i+Δ_σi), for each standard colour group, is calculated. The colour group is determined from the condition of minimum value of Σ(Δ_i+Δ_σi).

EFFECT: increased accuracy and objectiveness of determining colour group of fibre layers in flax stock.

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