Measuring method for soil moisture and electrical conductivity based on vectorial resultant and device thereof

Abstract

The invention discloses a measuring method for soil moisture and electrical conductivity based on vectorial resultant and a device thereof. Reference signals obtains resistance-capacitance model signals with variable amplitude and phase by a soil signal collection module; similarly, the reference signals is used, amplified and reversed to obtain reverse signals with adjustable gain; and vectorial resultant is carried out on the resistance-capacitance model signals and the reverse signals with adjustable gain by a vectorial resultant module to obtain capacitive component and conductive component, namely obtain the soil moisture and the electrical conductivity of the soil model. The invention provides a soil moisture testing method with simple and smart thought, easy operation and easy realization. The method can eliminate the influence of the electrical conduction in soil, accurately separate the capacitive component of the soil and improve the sensitivity and accuracy of a dielectric method for moisture measurement. By the offset to the electrical conductivity of the soil model, the electrical conductivity of the soil can be obtained; and the electric conductivity is an important parameter for reflecting the soil fertility.

Description

technical field [0001] The invention relates to a method for measuring soil moisture and electrical conductivity, in particular to a method and device for measuring soil moisture and electrical conductivity using vector synthesis signal processing technology. Background technique [0002] Determining the moisture status of the soil requires corresponding irrigation according to the moisture required by the crops in different growth cycles, which is of great significance in agricultural production, and it is also a very effective measure for rational use of water resources, especially in my country. The significance is even more significant when the utilization rate of agricultural water resources is not high. [0003] At present, the soil water content measurement methods at home and abroad mainly include: Karl Fischer method, soil tension method, drying method, capacitance method, resistance method, γ-ray method, microwave method, neutron method, time domain reflection metho...

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Problems solved by technology

Karl Fischer method, which uses chemical reagents, pollutes the environment and endangers health; soil tension method, which is easily affected by the soil environment and has poor stability; drying method, which can cause organic matter to decompose, resulting in inaccurate test results; resistance method, soil salinity The existence of the resistance method can not really reflect the moisture content of the soil; the gamma ray method, the microwave method, and the neutron method have certain radiation, which will affect the health and the environment; the time domain reflection method is expensive and has not yet been popularized.

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