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Chinese medicine sample authenticity preliminary screening method based on terahertz time-domain spectrum

A terahertz time-domain and terahertz technology, applied in the spectrum field, can solve problems such as unspecified support vector machine identification and deletion, and achieve the effect of simple operation, convenient use, and accurate calculation

Inactive Publication Date: 2013-06-05
TIANJIN UNIV
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Problems solved by technology

The content of this patent mainly involves the detection and identification system of Chinese herbal medicines. The identification method is only explained in principle, and it does not specifically explain how to use support vector machines for identification and deletion. Authenticity identification

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  • Chinese medicine sample authenticity preliminary screening method based on terahertz time-domain spectrum
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  • Chinese medicine sample authenticity preliminary screening method based on terahertz time-domain spectrum

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Embodiment Construction

[0017] Such as figure 1 As shown, the implementation steps of the present invention include data collection and import of genuine samples of traditional Chinese medicine and unknown authentic Chinese medicine samples, data calculation is performed to obtain the absorption coefficient of the above samples in the terahertz band, and the absorption coefficient of the genuine sample in the terahertz band The coefficients are stored in the Chinese medicine terahertz spectrum database. Through the data processing method of systematic clustering analysis, the purpose of preliminary judgment of the authenticity of samples with unknown authenticity is achieved.

[0018] 1) Real-time collection and import of terahertz time-domain spectral data of authentic samples of traditional Chinese medicine and reference air.

[0019] 2) Calculate the absorption coefficient of the genuine sample in the terahertz band, and store it in the traditional Chinese medicine terahertz spectrum database as ...

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Abstract

The invention belongs to the technical field of spectra, and relates to a Chinese medicine sample authenticity preliminary screening method based on a terahertz time-domain spectrum. The Chinese medicine sample authenticity preliminary screening method based on the terahertz time-domain spectrum includes the steps: (1) collecting a Chinese medicine vacuum sample and terahertz time-domain spectrum data referring to air; (2) calculating an absorption coefficient of the vacuum sample in a terahertz wave band to be used as a standard to be stored in a Chinese medicine terahertz spectrogram data bank; (3) calculating the terahertz time-domain spectrum of a to-be-tested Chinese medicine sample which is unknown in authenticity; (4) utilizing a data treating method of hierarchical cluster analysis, enabling the to-be-tested Chinese medicine sample which is unknown in authenticity and genuine article absorption data which exists in a Chinese medicine terahertz spectrogram data bank to be calculated in a clustering mode so as to conduct preliminary judgment to the authenticity of the Chinese medicine sample. The Chinese medicine sample authenticity preliminary screening method based on the terahertz time-domain spectrum can achieve the effect that preliminary authenticity identifying to the Chinese medicine sample is quick, convenient, and effective.

Description

Technical field [0001] The invention belongs to the technical field of spectroscopy, and relates to a method for identifying authenticity of traditional Chinese medicine samples. Background technique [0002] There are many kinds of traditional Chinese medicine, the quality is uneven, and the true and false are different, so how accurate is it. Rapid and effective identification of Chinese herbal medicines has become a new research direction. Traditional Chinese medicine belongs to the category of organic matter, which can be detected by terahertz waves. [0003] Terahertz wave is an electromagnetic wave with a wavelength between infrared and microwave. It has the characteristics of both electromagnetics and optoelectronics, and it exists widely in nature. Terahertz time-domain spectroscopy technology is a phase coherent technology of electromagnetic radiation, which uses femtosecond pulse laser pumping to generate and detect terahertz electromagnetic field radiation, and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/3563G01N21/3586
Inventor 何明霞郭帅刘嘉政范开张廷莹孙启生刘冠林秦蕊
Owner TIANJIN UNIV
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