Laser spectrum detection method for red wine quality

Abstract

The invention relates to a laser-induced fluorescence spectrum detection and identification method for red wine quality. The method comprises the following steps: (1) acquiring an original fluorescence spectrogram of a red wine sample by adopting a laser-induced fluorescence spectrum; (2) denoising the original fluorescence spectrum data by adopting a nonlinear wavelet transform threshold method;(3) carrying out iPLS waveband screening on the acquired laser spectrum to obtain a screened spectrogram; (4) dividing the screened fluorescence spectrum data into a training set and a test set by adopting a random division method; (5) optimizing the optimal penalty coefficient c and the kernel function parameter g of an SVM training model by adopting a PSO algorithm; and (6) establishing a red wine identification model on the training set, and testing an identification result of the model through the test set. The PSO is combined with the SVM to be used for detecting and recognizing the laser-induced fluorescence red wine, and the method has high classification accuracy and practical application value, is high in generalization capacity and is very suitable for real-time detection and popularization of adulterated red wine.

Description

technical field [0001] The invention relates to the field of food safety detection, in particular to a laser spectrum detection method for red wine quality. Background technique [0002] There are various types of red wine on the market, and the quality varies. Therefore, many unscrupulous traders take the opportunity to shoddy, which seriously endangers the rights and interests of consumers. Some criminals even mix low-quality red wine with pigments and add water to the red wine. Since most of the pigments are made of coal tar, they are laxative and carcinogenic. It has been reported that daily patients with unknown causes in foreign countries may be caused by the pigments in food additives. But for most consumers, it is difficult to identify the quality of red wine simply by taste, so a professional and fast identification method is needed. [0003] The principle of laser-induced fluorescence spectroscopy (LIF) technology is that the laser probe hits the laser on the samp...

AI Technical Summary

Problems solved by technology

[0002] There are various types of red wine on the market, and the quality varies. Therefore, many unscrupulous traders take the opportunity to shoddy, which seriously endangers the rights and interests of consumers. Some criminals even mix low-quality red wine with pigments and add water to the red wine. Since most of the pigments are made of coal tar, they are laxative and carcinogenic. It has been reported that daily patients with unknown causes in foreign countries may be caused by the pigments in food additives.

But for most consumers, it is difficult to identify the quality of red wine simply by taste, so a professional and fast identification method is needed

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