Rapid identification method for rosewood varieties

Abstract

The invention relates to a rapid identification method for rosewood varieties, and solves the problems that it is difficult for common consumers to distinguish dalbergia rueldii and pterocarpus santalinus in the rosewood varieties, professionals need to depend on experience and a standard wood slice microscopic identification method for identification, and the distinguishing difficulty is high. According to the method, the laser Raman spectrum technology and the laser-induced fluorescence spectrum technology are combined to rapidly and nondestructively identify the pterocarpus santalinus and the dalbergia rueldii, three laser wavelengths are adopted to irradiate a rosewood sample and obtain corresponding spectrums, Raman and fluorescence spectrum separation is performed according to fluorescence and Raman spectrum characteristics to obtain Raman and fluorescence characteristic spectrums of the sample, corresponding characteristic quantities are constructed to enlarge the spectral difference between the pterocarpus santalinus and the dalbergia rueldii, and then a discrimination model is established by applying multiple linear regression. According to the invention, Raman and fluorescence spectra of a sample can be obtained by a single CCD spectrometer, dalbergia rueldii and pterocarpus santalinus can be distinguished through modeling analysis, and nondestructive detection and identification are realized.

Description

technical field [0001] The invention belongs to the field of wood species detection and relates to a rapid identification method of mahogany species. Background technique [0002] Mahogany is the heartwood of red sandalwood, Dalbergia, persimmon, japonica and cassia species, and its structural characteristics, density and wood color meet the requirements of the national standard GB / T18107-2017. The price of different varieties of mahogany varies greatly. Such as sandalwood red sandalwood, commonly known as "small leaf sandalwood", due to the scarcity of wood, the price is very expensive, ranging from 650,000 to 840,000 per ton. The price of Lushi black rosewood produced in Madagascar is 70,000 to 80,000 to 80,000 per ton, which is only one tenth of that of sandalwood. Because Lushi black rosewood is very similar to sandalwood red sandalwood in texture and color, illegal merchants sell Lushi black rosewood as sandalwood red sandalwood driven by huge profits. As for Lushi's...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that it is difficult for ordinary consumers to distinguish between Dalbergia lushii and red sandalwood among mahogany varieties, and requires professionals to rely on experience and standard microscopic identification methods for wood slices to identify, which is difficult and time-consuming to distinguish. It provides A rapid identification method for mahogany species, using laser Raman spectroscopy and laser-induced fluorescence spectroscopy to quickly and non-destructively identify sandalwood and rosewood