Plant leaf water content measuring device and method

Abstract

The invention discloses a plant leaf water content measuring device and method. The device mainly comprises a leaf placement platform, a leaf thickness measuring module, a dielectric parameter measuring module, a control module and an upper computer module. The leaf thickness measuring module comprises a measuring rod and a differential type inductive transducer mounted at the bottom end of the mounting rod. When a probe descends and contacts with the surface of a leaf, a deformation signal of the transducer is transmitted to a single chip microcomputer after A / D conversion, the single chip microcomputer controls a stepping motor to stop working and calculates descending displacement of the probe, and thickness d of the leaf can be calculated according to an initial position of the probe and the descending displacement; then the dielectric parameter measuring module starts to work to measure dielectric parameter epsilon' of the leaf, and the single chip microcomputer combines the thickness d of the leaf and the dielectric parameter epsilon' of the leaf, utilizes an algorithm to predict water content of the plant leaf and can transmit a result to an upper computer for display, storage, analysis and application expanding. The plant leaf water content measuring device and method are suitable for quick, nondestructive and accurate detection of plant leaf water content.

Description

technical field [0001] The invention relates to a method and device for measuring the moisture content of plant leaves, belonging to the field of non-destructive testing. Background technique [0002] Plants often encounter some natural factors (drought, floods caused by regional factors) or human factors (irrigation is unreasonable, etc.) during the growth process. deficit. Therefore, a reasonable water environment is particularly important for its growth. On the other hand, my country's water resources are in short supply. The country advocates water conservation and excellent irrigation, and vigorously develops "precision agriculture". However, the premise of this initiative is to accurately detect the moisture content of crops. The traditional detection method of leaf moisture content is mainly dry weight loss method, which is time-consuming and laborious, and it is a destructive detection method. Other methods that use electrical characteristics to detect water conte...

AI Technical Summary

Problems solved by technology

The traditional detection method of leaf moisture content is mainly dry weight loss method, which is time-consuming and labor-intensive, and is a destructive detection method.

Other methods that use electrical characteristics to detect water content are not very accurate, because there are deficiencies in the measurement of plant leaf thickness: the clamping force is too small, causing air to be mixed between the plates, and the leaves will slide out; too much clamping force Large, it will damage the blade; and the size of different blades is different, the fixture does not match well

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