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Multichannel plant hydropenia monitoring system based on impedance measurement

A technology of impedance measurement and monitoring system, which is applied in the field of measurement, can solve problems such as complex circuits and plant damage, and achieve the effects of small size, avoiding damage, and easy portability

Inactive Publication Date: 2010-03-10
BEIHANG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, in the existing technology of monitoring plant water shortage by measuring plant electrical impedance, a high-frequency signal generator is used, which will cause certain damage to plants, and the circuit is complicated

Method used

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  • Multichannel plant hydropenia monitoring system based on impedance measurement
  • Multichannel plant hydropenia monitoring system based on impedance measurement

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Embodiment Construction

[0028] The specific implementation process is as follows:

[0029] Refer to attached figure 1 , figure 2 , connect the impedance measurement unit 121 to the PC 141 through USB communication and the USB adapter cable of the control unit 131; set the measurement frequency and measurement time on the PC VB interface, select the measurement channel or all channels for automatic switching measurement, USB communication and the control unit 131 send the set parameters to the impedance measurement unit 121; one or more pairs of electrodes 113 for measuring plants and a pair of electrodes 114 for measuring soil are connected to the corresponding measurement channels 121 through measurement leads 123 and 124, and the channels The selection module 251 automatically switches channels, and the calibration and range selection module 231 automatically calibrates and selects an appropriate range; the impedance measurement unit 121 measures the amplitude and phase angle of the impedance of ...

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Abstract

The invention relates to a multichannel plant hydropenia monitoring system based on impedance measurement. The system is a portable system comprising an electrode, a measuring lead, an impedance measuring unit, a USB communication and control unit and a personal computer, wherein the electrode adopts a metal sheet, is arranged at a plurality of parts of leaves and stems of a plant or inserted intosoil in a non-invasive way and connected to the impedance measuring unit by the single-core coaxial measuring lead; the impedance measuring unit comprises an impedance measuring module, a calibrationand measuring range selecting module and a channel selecting module and is supplied with power by a USB data line; and the USB communication and control unit realizes the communication between the impedance measuring unit and the personal computer. The system controls the switching-on and switching-off of a switch by an interface procedure on the personal computer, realizes the function of multichannel impedance measurement, acquires the change information of the impedance of a plurality of parts of the leaves and the stems of the plant and the soil along with water content and displays the hydropenia condition of the plant on the interface. The system can preset a time interval to carry out long-term monitoring so that the monitoring of the hydropenia condition of the plant is more portable.

Description

【Technical field】 [0001] The invention belongs to the technical field of measurement, in particular to a multi-channel plant water shortage monitoring system based on impedance measurement. 【Background technique】 [0002] Water is the main component of plants. The water content of plants is generally 60-80%, and some can even reach more than 90%. Without water, there is no life. Water is a solvent for many substances. Minerals, oxygen, and carbon dioxide in the soil must be dissolved in water before they can be absorbed by plants and function in the body. Water can also maintain the tension of cells and tissues, and keep plant organs upright, so as to facilitate the normal progress of various metabolisms. Water is the raw material for photosynthesis to produce organic matter, and it also participates in many biochemical processes in plants as a reactant. In addition, due to the large heat capacity of water, when the temperature fluctuates violently, it can moderate the tem...

Claims

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Application Information

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IPC IPC(8): G01N27/02G05B19/418G05B19/042
CPCY02P90/02
Inventor 徐立军陈健军曹章
Owner BEIHANG UNIV
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