Leaf water near infrared non-destructive testing device and method in light open environment

Abstract

The invention discloses a leaf water near infrared non-destructive testing device in a light open environment, comprising a modulation light source, a testing circuit and calculating and processing equipment, wherein the modulation light source is used for launching alternating current optical signals with modulated light intensity to a leaf according to an alternating current rule, the testing circuit is used for converting the alternating current optical signals permeating through the leaf to spectroscopic data, and the calculating and processing equipment is used for calculating the water concentration of the leaf from the spectroscopic data. The invention also discloses a leaf water near infrared non-destructive testing method in the light open environment, comprising the following steps of sequentially illuminating two lights with preset wavelengths, which are a first light and a second light, onto the surface of the leaf through optical fibers; converting the two lights which transmitting the leaf to first spectroscopic data and second spectroscopic data; calculating the water concentration of the leaf according to the two kinds of spectroscopic data. The device has simple structure, and can carry out testing in the light open environment and eliminate attenuation caused by light absorption and scattering of a leaf background in the process of water testing to enable a measured value of the water concentration to be more accurate.

Description

technical field [0001] The invention relates to the technical field of crop moisture detection in agricultural technology, in particular to a near-infrared nondestructive detection device and method for leaf moisture in an open-light environment. Background technique [0002] Near-infrared spectroscopy is an efficient and fast modern analysis technology, which has been widely used in many fields, especially in the quality inspection of food and agricultural products. Near-infrared light refers to electromagnetic waves with a wavelength in the range of 780-2526nm, which is the earliest non-visible light region known to people. It is customary to divide near-infrared light into near-infrared short-wave (780-1100nm) and long-wave (1100-2526nm) regions. Modern near-infrared spectroscopy is the fastest-growing and most eye-catching spectral analysis technology since the 1990s, and it is an organic combination of spectral measurement technology and chemometrics. There is a scien...

AI Technical Summary

Problems solved by technology

This method is fast and simple, but the leaves need to be operated in vitro or placed in a completely light-enclosed condition for measurement, which will affect the reliability and accuracy of the measurement data

[0007] In summary, the currently used methods for detecting plant leaf moisture (prior art) are all short-term and damaging, and are not suitable for real-time and long-term monitoring of plants; or non-destructive measurement using indirect methods , the design of the measuring device is cumbersome, the required measurement precision and accuracy cannot be achieved, and the stability is not high

Prior art also can not provide the further analysis method and step of plant leaf moisture

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