Soil moisture monitoring system

Abstract

The invention discloses a soil moisture monitoring system. The system comprises a high-frequency signal source, a sensing unit, a signal detection circuit and a time-division multiplexing switching unit, wherein the high-frequency signal source is used for providing soil moisture detection high-frequency signals; the sensing unit comprises multiple groups of sensing components which are alternately arranged in layers and is used for sensing moisture of soil sections with different depths under the action of the high-frequency signal source; the signal detection circuit is connected with the sensing unit and is used for respectively generating a first voltage signal and a second voltage signal under the action of the high-frequency signal source; and the time-division multiplexing switchingunit is arranged between the sensing unit and the signal detection circuit and is used for carrying out time division and conduction on each layer of sensing component and the signal detection circuit. According to the system, time division and conduction are carried out on each group of sensing components through the time-division multiplexing switching unit to ensure that the multiple groups ofsensing components share the same signal detection circuit, so that the consistency of signals output by the signal detection circuit is ensured, the accuracy of the moisture detection is remarkablyimproved, and the circuit cost and labor cost of circuit debugging are reduced.

Description

[0001] This application is the priority of application number 201810403883.9 technical field [0002] The invention relates to the technical field of soil moisture detection, in particular to a soil moisture monitoring system. Background technique [0003] Soil moisture monitoring technology is widely used in important monitoring projects such as agriculture, water conservancy, meteorology, forestry and ecology. At the same time, soil moisture is also an important part of soil fertility and an important factor affecting plant growth and development. Dynamic changes in soil moisture directly affect Therefore, real-time monitoring of the vertical distribution of soil moisture is of great significance for studying the law of crop root water demand and formulating a reasonable irrigation strategy. [0004] Traditional soil moisture detection methods generally perform single-point detection on the soil profile, and the method for single-point detection of soil moisture is to use ...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the embodiments of the present invention lies in the integrated design of multiple independent detection circuits in the prior art. Due to the inconsistency in the performance of each electronic component, the output of the detection signal is inconsistent and the signal interference is relatively large. , the detection accuracy is reduced

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