A device for correcting soil moisture content and a method for correcting the same

Abstract

The invention relates to the field of soil water content measurement, and discloses a soil water content correction device and a correction method thereof, including a thermal resistance, a printed circuit board and a probe; the printed circuit board includes a moisture detection circuit and a temperature detection circuit, The moisture detection circuit is used to detect the moisture content of the soil, and the temperature detection circuit is used to detect the temperature of the soil; the probe is electrically connected to the excitation electrode of the moisture detection circuit, the shell of the thermal resistance is electrically connected to the ground electrode of the moisture detection circuit, and the thermal resistance The lead wire is electrically connected with the temperature detection circuit. The soil water content correction device provided by the present invention can realize synchronous detection of the water content and temperature at the same location, and bring the measured output voltage of the water detection circuit, soil temperature and the ambient temperature of the printed circuit board into the soil corresponding to the temperature. The moisture content temperature effect correction formula can realize the correction of soil moisture measurement, especially the measurement of unfrozen water content in frozen soil, and can effectively improve the measurement accuracy.

Description

technical field [0001] The invention relates to the field of soil water content measurement, in particular to a soil water content correction device and a correction method thereof. Background technique [0002] Soil moisture content is an important physical parameter of soil, which is of great significance to the growth of plants. At the same time, for permafrost, during the process of soil freezing and thawing, the change of groundwater phreatic level and the movement of water and solute (salt) in the soil are obviously affected by the law of soil freezing and thawing. In areas with high salt content in groundwater, it will also cause secondary salinization of soil. When the soil freezes, the water changes from liquid to solid and its volume increases, which causes the volume of the soil to expand, resulting in frost heave. When the soil melts, the volume of the soil decreases, and the phenomenon of thawing will also occur. The stress and deformation caused by frost hea...

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Problems solved by technology

[0006] In view of the above-mentioned technical defects and application requirements, this application proposes a soil moisture content correction device and its correction method to solve the problem that the existing dielectric soil moisture sensors are affected by temperature during measurement, especially in frozen soil. defects that cause errors

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