Plant leaf water content measuring device and method

A technology of plant leaves and measuring devices, which is applied in measuring devices, instruments, and material analysis through electromagnetic means, and can solve problems such as damaged leaves, polar plates mixed with air, time-consuming and labor-intensive problems, etc.

Active Publication Date: 2018-08-07
JIANGSU UNIV
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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 de...

Method used

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  • Plant leaf water content measuring device and method
  • Plant leaf water content measuring device and method
  • Plant leaf water content measuring device and method

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Embodiment Construction

[0036] The invention proposes a device for measuring the moisture content of plant leaves, which includes a plant leaf thickness measurement module, a dielectric parameter measurement module, a control module, and a host computer module, wherein the leaf thickness measurement module includes a stepping motor, a stepping motor drive module, a measuring Rod, differential inductance sensor, dielectric parameter measurement module includes LCR measuring instrument 10, two wires, control module 8 adopts single-chip microcomputer, upper computer module 13 adopts PC, specifically as follows:

[0037] The differential inductance sensor is directly installed on the probe of the measuring rod 5 and fixed with screws to facilitate the direct contact measurement of the blade by the sensor; the connection line of the sensor is connected to the A / D conversion module 18 to transmit the signal to the control system.

[0038] The device for controlling the vertical movement of the measuring rod...

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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...

Claims

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Application Information

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IPC IPC(8): G01N27/22
CPCG01N27/221G01N27/223
Inventor 孙俊莫云南田燕武小红陈勇戴春霞
Owner JIANGSU UNIV
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