Transmission-type nondestructive measuring device and method of water content of plant leaves

A non-destructive testing, plant leaf technology, applied in the direction of measuring device, color/spectral characteristic measurement, material analysis through optical means, etc., can solve the problems of high price, large instrument volume, heavy weight, etc., and achieve easy portability and small size , light weight effect

Inactive Publication Date: 2011-02-16
CHINA AGRI UNIV
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Problems solved by technology

However, using continuous spectrum (with multiple wavelength points) to analyze the water content of leaves, the

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  • Transmission-type nondestructive measuring device and method of water content of plant leaves
  • Transmission-type nondestructive measuring device and method of water content of plant leaves
  • Transmission-type nondestructive measuring device and method of water content of plant leaves

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Embodiment Construction

[0043] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0044] The core idea of ​​the present invention is to adopt the transmission method, based on the light source being a near-infrared LED, a single-chip microcomputer and an optical frequency converter to form a transmission-type non-destructive detection plant leaf water content device, at the characteristic wavelength of the leaf water absorption at 980nm and the reference wavelength 890nm Measure the absorbance of plant leaves at these two wavelengths, use the least square method to establish a mathematical model to determine the quantitative relationship between plant leaf water content and absorbance, and non-destructively detect plant leaf water content.

[0045] figure 1 It is a schematic structural diagram ...

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Abstract

The invention discloses a transmission-type nondestructive measuring device and a method of water content of plant leaves. The device comprises a singlechip, a signal acquisition module connected with the singlechip, a man-machine interaction module, a memorizer and a serial communication module. In the invention, the transmission-type nondestructive measuring device of water content of the plant leaves consisting of the singlechip and an optical frequency converter is used to measure the absorbance of the plant leaves respectively at the water content absorption feature wavelength of the leaves of 980 nm and the reference wavelength of 890 nm based on the transmission method and a near-infrared LED light source, and the water content of the plant leaves is measured in a nondestructive mode through the quantitative relation of the water content of the plant leaves and the absorbance by using the mathematical model which is established through the least square method. The device has the characteristics of small volume, light weight, convenient carrying, fast and nondestructive measurement of the water content of the plant leaves.

Description

Technical field [0001] The invention relates to the technical field of crop water content detection in agricultural technology, in particular to a transmission type non-destructive detection device and method for plant leaf water content. Background technique [0002] In agricultural production, the water content condition is an extremely important natural condition. Water content is one of the main factors that control plant photosynthesis, respiration and biomass. Water deficit directly affects the physiological and biochemical processes and morphological structure of plants, which in turn affects plant growth, yield and quality. [0003] The standard method of water content measurement is the drying method, but the drying method is a destructive measurement, which needs to destroy the sample, and the measurement time is long and the steps are cumbersome. As a result, there have been instrumental methods for measuring water content, including microwave moisture method, capacitiv...

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Application Information

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IPC IPC(8): G01N21/35G01N21/3554G01N21/3563G01N21/359
Inventor 吉海彦侯瑞
Owner CHINA AGRI UNIV
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