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Method for quantifying soil macropore spatial network structure based on CT scanning technology

A technology of CT scanning and network structure, applied in the field of agricultural engineering, can solve the problems of few soil science applications, large disturbance, undisturbed soil damage system, etc., to achieve three-dimensional quantitative analysis, enhance image quality, and eliminate image noise Effect

Active Publication Date: 2017-03-29
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

These methods generally have problems, mainly focusing on the damage caused to the undisturbed soil and the existence of systematic errors
At present, some researchers in the world have used CT scanning method as a frontier method for the study of soil macroporous spatial network structure, but due to the limitation of scanning cost and sampling cost, this method has not been widely used. There are even fewer applications
In the world, although this method has been applied, the sampling method adopts manual excavation method, which is more disturbing; in terms of 3D visualization and quantification, there are still unresolved problems in the selection of threshold segmentation method and the analysis of pore throats
In addition, although some scholars in China have begun to use CT scanning to study soil macropore structure, they are mainly based on two-dimensional analysis, and have not realized three-dimensional quantitative analysis; in terms of analysis software, they mainly rely on the built-in software of CT scanner or Image Open source software such as J, less professional software such as Avizo

Method used

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  • Method for quantifying soil macropore spatial network structure based on CT scanning technology
  • Method for quantifying soil macropore spatial network structure based on CT scanning technology

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0031] Such as Figure 1-2 As shown, a method for quantifying the spatial network structure of soil macropores based on CT scanning technology according to an embodiment of the present invention includes the following steps:

[0032] S1. Sample collection: Slowly press the PVC pipe 1 into the soil. Once the entire PVC pipe is taken out, seal and block it with a PVC cover to obtain an undisturbed soil core;

[0033] S2, CT scanning: place the sample flat on the CT scanning equipment for scann...

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Abstract

The invention discloses a method for quantifying a soil macropore spatial network structure based on the CT scanning technology. The method comprises the following steps of sample collection, CT scanning, threshold value selection, data enhancement, image cutting and binarization, three-dimensional visualization and three-dimensional quantization analysis. The method has the advantages that a professional undistributed soil sampling instrument is used for sampling, and disturbance in the undistributed soil collecting process is reduced; a CT scanner and professional three-dimensional analysis software are combined, the most proper threshold value cutting method is adopted, and three-dimensional quantifying analysis of the soil macropore spatial structure is achieved.

Description

technical field [0001] The invention belongs to the technical field of agricultural engineering, and in particular relates to a method for quantifying soil macropore space network structure based on CT scanning technology. Background technique [0002] The traditional methods for measuring soil macropores mainly include staining method, slice method, marker breakthrough curve method and soil tension infiltration meter method. These methods generally have problems, mainly focusing on the damage caused to the undisturbed soil and the existence of systematic errors. At present, some researchers in the world have used CT scanning method as a frontier method for the study of soil macroporous spatial network structure, but due to the limitation of scanning cost and sampling cost, this method has not been widely used. There are even fewer applications. In the world, although this method has been applied, the sampling method adopts the artificial excavation method, which is more d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G06T5/00G06T7/00
CPCG01N15/08G06T2207/10081G06T2207/30188G06T5/70
Inventor 胡霞李宗超刘勇孙贞婷
Owner BEIJING NORMAL UNIVERSITY
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