Soil layering information identification method and device based on ground penetrating radar

Abstract

The invention discloses a soil layering information identification method and device based on a ground penetrating radar. The method comprises the following steps: acquiring ground penetrating radar echo signals of an operation area; performing kalman filtering on the preprocessed ground penetrating radar echo signal, extracting the instantaneous frequency of the ground penetrating radar echo signal by utilizing Wigner-Ville distribution, and determining the time domain position of a soil interface; carrying out feature extraction on the ground penetrating radar echo signal by using wavelet transform, inputting the extracted features and soil moisture information read by a soil moisture sensor into a CNN model, carrying out soil texture identification on soil layers, and estimating the propagation velocity of electromagnetic waves in each soil layer; and according to the time domain position information of the soil interface of each soil layer and the electromagnetic wave propagation speed of the layer, determining the thickness of each soil layer, and realizing identification of the soil layering information. The method can effectively identify the layering information of the shallow soil, can be applied to estimation of the thickness of the plough layer in actual production, and has the potential of popularization and application.

Description

technical field [0001] The invention relates to the technical field of agricultural informatization, in particular to a method and device for identifying soil stratification information based on ground penetrating radar. Background technique [0002] Soil stratification information is an important indicator for evaluating soil quality and determines land productivity to a certain extent. Different soil textures and soil thicknesses in different soil layers have different effects on infiltration, evaporation and other processes. Therefore, it is an important issue in soil research to quickly and accurately obtain soil layer information, especially soil layer thickness information. . The conventional methods for detecting soil stratification information mainly use profile visual inspection or soil particle analysis. This method does not require complex data interpretation, but the measurement process is generally time-consuming and labor-intensive, and the detection results a...

AI Technical Summary

Problems solved by technology

However, the research on soil stratification by GPR at home and abroad is still in its infancy, especially when the interface of each layer is clear and there are large typical differences in the medium, the research on the interface and layer thickness of the soil layer is relatively easy to identify. However, the quantitative expression and high-precision results of field soil layers with no obvious differences in soil texture between layers need further research

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