On-line measurement method for water content of mechanically-parched Longjing tea leaves

A detection method, tea technology, applied in measuring devices, analysis materials, color/spectral characteristics measurement, etc., can solve the problems that cannot meet the requirements of real-time detection of tea moisture and the measurement process is complicated

Inactive Publication Date: 2013-04-17
ZHEJIANG UNIV OF TECH
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  • Claims
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Problems solved by technology

The measurement process of this method is complicated and generally takes a few m

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  • On-line measurement method for water content of mechanically-parched Longjing tea leaves
  • On-line measurement method for water content of mechanically-parched Longjing tea leaves
  • On-line measurement method for water content of mechanically-parched Longjing tea leaves

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0042] In order to achieve a simple, fast and non-destructive online detection of the moisture content of machine-fried Longjing tea leaves, the implementation process of the present invention is as follows:

[0043] 1) Acquisition of full-band tea spectral samples

[0044] Using hyperspectral instrument to obtain machine-fried Longjing tea in different picking periods (spring tea and autumn tea), different water content (65%, 50%, 45%, 40%, 35%, 30%, 20% and 15%), different leaf The spectral dat...

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Abstract

The invention provides an on-line measurement method for water content of mechanically-parched Longjing tea leaves, which is implemented based on spectral characteristic parameters. The method comprises the following steps: firstly determining a sampling plan by the uniform design method, obtaining the all-band spectrum of the mechanically-parched Longjing tea leaves by use of a hyperspectral device, and performing spectral pretreatment and analysis; and determining sensitive spectral bands and calculating spectral characteristic parameters according to the relevance analysis on water content of mechanically-parched Longjing tea leaves, and establishing an inverse model based on the small-sample non-statistical theory and ant colony algorithm to predict the water content of the mechanically-parched Longjing tea leaves. The technical scheme provided by the invention can achieve the purpose of on-line real-time detection of the water content of mechanically-parched Longjing tea leaves, and can be used in a full-automatic tea leaf processing equipment system to increase the production efficiency.

Description

technical field [0001] The invention relates to a detection technology based on infrared spectrum, in particular to an online detection technology capable of realizing the water content of tea leaves, and in particular to an online detection method for the water content of machine-fried Longjing tea leaves. Background technique [0002] On-line detection of tea moisture is the most important link in the production process of machine-fried tea. Tea is a dry agricultural product. According to the theory of food science, the absolutely dry food is easily oxidized by oxygen in the air because various ingredients are directly exposed to the air. When water molecules combine with food ingredients by hydrogen bonds and form a monomolecular layer, it seems to cover the surface of the food with a protective film, which protects the food and slows down the oxidation process. Many studies have shown that when the water content in tea is about 3%, the tea ingredients and water molecul...

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Application Information

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IPC IPC(8): G01N21/25G01N21/35G01N21/31G01N21/3554G01N21/3563G01N21/359
Inventor 乔欣张宪赵章风王扬渝钟江
Owner ZHEJIANG UNIV OF TECH
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