Method of utilizing ground penetrating radar data to construct tree root system three-dimensional image

Abstract

A method of utilizing ground penetrating radar data to construct a tree root system three-dimensional image comprises the following steps: drawing multiple strips of concentric circles measuring lines at equal intervals around tree trunks of the to-be-measured trees, utilizing the ground penetrating radar to acquire the ground penetrating radar data of the tree root system under each measuring line; setting information of each sensing point P of the ground penetrating radar data as PC, N (dis, dep, dia); starting from the ground penetrating data of the measuring line in the outermost circle, opening a search window in the ground penetrating radar data of the measuring line of the C+1 circle on the side close to the tree trunk direction; seeking root source of PC, N of the measuring line of the C+1 circle; utilizing a spline curve to connect each sensing point to acquire the tree root system three-dimensional image. The method of utilizing the ground penetrating radar data to construct the tree root system three-dimensional image has the advantages that digging out or exposing of the root system from the soil is not needed, and thus growing environment of a plant cannot be destroyed, and the problem of root system lossless observation is solved.

Description

Technical field [0001] The invention relates to a method for constructing a three-dimensional image of a tree root system using ground penetrating radar data, that is, a three-dimensional model of the tree root system distribution is constructed by the method. Background technique [0002] The root system of trees is very important, but since almost all root systems grow in the soil, it is impossible to directly observe them continuously for a long time. If the observation method of digging out the root system from the soil or exposing it is adopted, it will undoubtedly disturb the environment around the root system, which will affect the structure and function of the root system. Therefore, it is necessary to provide an efficient and practical method that does not damage the soil and plant roots, and can achieve long-term continuous observation. [0003] CN101813774A discloses a method for measuring the diameter of underground roots of plants by using ground penetrating radar, wh...

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Problems solved by technology

[0004] However, the combination of the above-mentioned existing technologies obtains a bunch of discrete GPR data after all, and it is still unclear to construct a three-dimensional model of the distribution of tree roots from these data, and even to construct a three-dimensional image of the tree root system

For example, even if a person skilled in the art obtains ground-penetrating radar discrete data of underground roots in the form of dense sections, these data are not continuous in the form of three-dimensional images. For relatively thick roots, these roots can still be distinguished by naked eyes. However, for densely distributed small root systems, it is difficult to judge that the root in a certain section is connected to the root in its adjacent section, which is where the problem to be solved by the focus of the present invention is, that is, The invention provides a method for constructing a three-dimensional image of tree roots by using ground penetrating radar data

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