A Method for Measuring the Maturity of Tobacco Leaf Based on Reflectance Spectrum

A technology for mature tobacco leaves and reflection spectrum, which can be used in color/spectral property measurement, measurement device, material analysis by optical means, etc.

Active Publication Date: 2017-12-01
YUNNAN TOBACCO CO LTD KUNMING BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used method for measuring the maturity of tobacco leaves in my country is a judgment method that combines leaf color with planting time. This method is highly subjective and prone to inter-individual differences, which has a significant impact on the reliability and accuracy of the measurement results. influences

Method used

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  • A Method for Measuring the Maturity of Tobacco Leaf Based on Reflectance Spectrum
  • A Method for Measuring the Maturity of Tobacco Leaf Based on Reflectance Spectrum
  • A Method for Measuring the Maturity of Tobacco Leaf Based on Reflectance Spectrum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] In 2014, a field tobacco leaf maturity test was carried out in Shangzhao, Shilin County, Kunming City, Yunnan Province. The planted varieties were K326, Honghua Dajinyuan and Tianyan. After the tobacco leaves entered the mature stage, the upper, middle and lower tobacco leaves of each variety were selected, and five different maturity levels of M1 green, M2 underripe, M3 still ripe, M4 mature and M5 overripe were selected for each part. Tobacco leaves, the number of tobacco leaves selected for each maturity level is 25 pieces, and the tobacco leaves are required to be healthy and free from diseases and insect pests.

[0108] Choose to measure the spectral data of each tobacco leaf with a FieldSpec3 ground object spectrometer when the weather is clear and cloudless, gently clamp the tobacco leaf with the leaf clip equipped with the spectrometer, and select 4 points evenly distributed on each tobacco leaf, That is, select 4 points on both sides of the main vein at a dista...

Embodiment 2

[0114] In 2014, a field tobacco leaf maturity test was carried out at the Tobacco Science and Technology Experimental Base of Xundian County, Kunming City, Yunnan Province. The planted varieties were K326, Honghua Dajinyuan and Tianyan. Except that the number of tobacco leaves selected for each maturity level is 27, all the other are the same as in Example 1.

[0115] The experimental results are shown in Table 2.

[0116] Table 2 Maturity test results of field tobacco leaves in Xundian County Science and Technology Experimental Base, Kunming City, Yunnan Province

[0117]

Embodiment 3

[0119] In 2014, a field tobacco leaf maturity test was carried out in Zhongling, Tangzi Town, Xundian County, Kunming City, Yunnan Province. The planted varieties were K326, Honghua Dajinyuan and Ground Tobacco. Except that the number of tobacco leaves selected by each maturity level is 24, all the other are the same as in Example 1.

[0120] The experimental results are shown in Table 3.

[0121] Table 3 Maturity test results of Zhonglingdi tobacco leaves in Tangzi Town, Xundian County, Kunming City, Yunnan Province

[0122]

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Abstract

The invention discloses a method for measuring the maturity of tobacco leaves based on reflection spectrum. The method selects the upper, middle and lower tobacco leaves of the tobacco plant after the tobacco leaves enter the mature stage, and selects raw green, underripe, still ripe, mature and overripe tobacco leaves for each part, and the number of tobacco leaves selected for each grade is 20-30 Tobacco leaf spectral data is measured on a sheet to obtain the green peak amplitude, green peak position, red light absorption valley amplitude, red light absorption valley position, red edge amplitude, blue edge amplitude, red edge area, blue edge area, and Green edge amplitude / red light absorption valley amplitude, normalized green edge amplitude / red light absorption valley amplitude, red edge area / blue edge area, normalized red edge area / blue edge area, as support The input to the vector machine is modeled to determine the maturity level. The determination method avoids the singleness of data, is stable and accurate, has strong applicability and good fitting degree.

Description

technical field [0001] The invention belongs to the technical field of tobacco planting, in particular to a method for measuring the maturity of tobacco leaves based on reflection spectrum. Background technique [0002] Accurately grasping the maturity of tobacco leaves in the field is of great significance for timely harvesting. How to choose the most appropriate maturity for harvesting to minimize the field loss rate and baking loss rate of tobacco leaves directly determines the yield of tobacco. Therefore, the division and accurate determination of tobacco leaf maturity grades are very important components of tobacco leaf production. At present, the commonly used method for measuring the maturity of tobacco leaves in my country is a judgment method that combines leaf color with planting time. This method is highly subjective and prone to inter-individual differences, which has a significant impact on the reliability and accuracy of the measurement results. influences. Ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25G01N21/3563
Inventor 徐兴阳劳彩莲吴永明刁航欧阳进方荣启叶佳伟张俊文朱利全李登雄戴恩
Owner YUNNAN TOBACCO CO LTD KUNMING BRANCH
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