System and method for detecting and identifying Chinese herbal medicine

Abstract

The invention relates to a system and a method for detecting and identifying Chinese herbal medicine. In the invention, terahertz which is radiated from gallium arsenide under the excitation of femto-second laser is used for researching Chinese herbal medicine so as to achieve the purpose of distinguishing true and false Chinese herbal medicine and detecting the quality of the Chinese herbal medicine. In the system and the method, the femto-second laser is divided into pump light and detection light by a beam splitter; after being modulated by a chopper and an attenuator, the pump light is focused by a focusing lens onto the gallium arsenide to give off the terahertz; the radiated terahertz is focused onto a tested Chinese herbal medicine sample by two parabolic mirrors; a terahertz signal with Chinese herbal medicine information is collected and focused onto an electro-optic crystal by another two parabolic mirrors; and detection light is also focused onto the electro-optic crystal by a delay device so as to detect the terahertz signal with the Chinese herbal medicine information. The corresponding terahertz absorption spectrum is calculated after Fourier transform, and then the Chinese herbal medicine can be quickly and effectively identified and screened by a support vector machine method.

Description

technical field [0001] The invention belongs to the technical field of detection and identification of Chinese herbal medicines, and in particular relates to a detection and identification system and method for judging the similarity, authenticity, and the same category but different quality of Chinese herbal medicines. Background technique [0002] Chinese herbal medicine is a great treasure of the Chinese nation. It is a tradition in our country to use Chinese herbal medicine to treat diseases, especially for some chronic diseases and consumptive diseases, which play an important role that Western medicine cannot replace. However, there are many kinds of Chinese herbal medicines, their quality is uneven, and the true and false are different. Their curative effects are directly related to the quality and types of Chinese herbal medicines. How to accurately, quickly and effectively identify Chinese herbal medicines has become a new hot spot. [0003] The identification meth...

AI Technical Summary

Problems solved by technology

[0006] From the above analysis, it can be seen that the identification of Chinese herbal medicines is moving in a fast and accurate direction, and the traditional identification methods are gradually losing their effectiveness. It is necessary to develop a new type of identification system for Chinese herbal medicines to identify Chinese herbal medicines more quickly, effectively and accurately.

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