A Smart Sensing Platform to Study Moisture Content and Soil Texture

Xueao Mei

《Frontiers in Science and Engineering》 1卷6期 (2021/09) Pp. 10-30

https://doi.org/10.29556/FSE.202109_1(6).0002

摘要

Soil moisture is one of the important indexes of soil character; it is of great significance and greatly influences agricultural geology, climate, and surface hydrology. Therefore, we should carry out a series of studies on the measurement of soil moisture. We first investigated how two core parameters of soil, soil texture and moisture content, affect the power absorption of the 2.45 GHz electromagnetic wave emitted by the sensor, this paper set up the eight different types of soil samples, including five to be established in accordance with the real soil texture that constitutes the proportion of the soil model. The three of them are single ideal soil texture model, as a comparison, and set up five different volumetric moisture content in the soil, and then use the MATLAB calculation of the related physical parameters of the soil dielectric model, combining with COMSOL software was used to carry out the simulation experiment. The influence of water content and soil texture on the electromagnetic wave power absorbed by soil was obtained, which was expressed intuitively by graph and further discussed. After the influence of soil moisture content and soil texture on microwave power absorption is obtained, the possibility of ceramic as the probe of the soil moisture sensor mentioned in this paper is proposed. Like the soil, the dielectric constant is calculated and the porous ceramic model is established. Then, the relation curve between the moisture content of the porous ceramic and the absorbing electromagnetic wave power is established. Finally, it is concluded the power absorption of porous ceramic after water absorption is similar to that of soil moisture.

關鍵字

Electromagnetic Wave ； Soil Moisture ； Soil Texture ； Power Absorption ； Porous Ceramics

參考文獻

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