A rapid identification method of mahogany species

Abstract

The present invention relates to a rapid identification method of mahogany species, which solves the problem that ordinary consumers are difficult to distinguish between rosewood species Dalbergia lushii and sandalwood red sandalwood, and professionals need to rely on experience and standard microscopic identification methods for wood slices for identification. Distinguish difficult problems. This method combines laser Raman spectroscopy and laser-induced fluorescence spectroscopy to quickly and non-destructively identify sandalwood and rosewood. Three laser wavelengths are used to irradiate redwood samples and obtain corresponding spectra. The Raman and fluorescence spectra were separated, and the Raman and fluorescence characteristic spectra of the sample were obtained, and the corresponding characteristic quantities were constructed to expand the spectral difference between the red sandalwood and the black Dalbergia lusi, and then the multivariate linear regression was used to establish a discriminant model. The invention can realize the Raman and fluorescence spectrum of the sample can be obtained by a single CCD spectrometer, can distinguish the Dalbergia lusi and the red sandalwood through modeling analysis, and realize the non-destructive detection and identification.

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