Research On Wood Identification Based On The Spectral Analysis

Researching the feasibility analysis of wood identification, by the experiment of collecting spectrum, the analytical method and statistical analysis technique, to complement the conventional wood identification.(1)The visible spectrum is normal school in LCH color space; the significance of difference amongst all trees is 96.3 percent, the influence degree,in visible spectrum, is H,L,C descendingly, the result of classification based on visible have noting to do with the decorative design of wood, is partly different from the.result of classification based on dendrologist, and paduk; by verifiably, the model of wood identification based on the visible spectrum is basely useful, and is able to identify the tree species of wood. The pivotal part needed optimize is sample size gain, based on level of significance a=0.001.(2)In the same classification, the near infrared spectrum of wood has some close characteristic absorption peak and close absorption peak, in the different classification, the near infrared spectrum of wood has some different characteristic absorption peak and different absorption peak, this is because the chemical composition of wood is similar partly and different partly, and provide the basis for wood identification based on near infrared spectrum. The all band, particularly 700-904.742 nm, play a decisive role. The result of wood classification based on near infrared spectrum is useful, particularly is in substantial agreement with the classification based on padauk.(3)After the extraction experiment,the reduction of lumber quality is 27.09%-40.23%. the color of powdered wood become light, and the powdered wood color of all tree species become similar. The cellulose, hemi-cellulose, and lignin play an important role in the distribution situation of middle infrared spectrum. And the extraction play an important role in the characteristic absorption peak and absorption peak of middle infrared spectrum. The difference of wood chemical composition among all tree species is phenolic compound and hydrocarbon compound firstly, secondly is aldehydes compound, ether compound, alcoholic compound, saturated fatty acid, and unsaturated fatty acid.(4)Based on characteristic organization structure, wood identification is useful in a great measure, but it is difficult between the wood whose characteristic organization structure is similar; Based on visible spectrum, wood identification is useful in a great measure, but it is difficult between the wood whose visible spectrum is similar; The result of wood classification based on near infrared spectrum is useful, particularly is in substantial agreement with the classification based on padauk; Based on the similarities and differences of characteristic absorption peak and absorption peak of middle infrared spectrum, wood identification is useful.The wood identification based on visible spectrum, near infrared spectrum, middle infrared spectrum, is complementation. It is important that wood identification based on characteristic organization structure, will be more accurate, with the spectrum as the supplementary and development.