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Method for quantifying coal lattice stripe length based on HRTEM

A fringe and lattice technology, which is applied in high-resolution transmission electron microscope testing and image processing in coal chemistry, can solve the problems of relying on manual extraction, heavy workload errors, etc., and achieve good matching degree of lattice fringe distribution, improve efficiency, and match good effect

Active Publication Date: 2021-03-09
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical problem of excessive reliance on manual extraction in the extraction of lattice fringes in coal in the prior art method, which results in a heavy workload and unavoidable artificial errors, and provides a HRTEM-based A method for quantifying the length of coal lattice stripes

Method used

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  • Method for quantifying coal lattice stripe length based on HRTEM
  • Method for quantifying coal lattice stripe length based on HRTEM
  • Method for quantifying coal lattice stripe length based on HRTEM

Examples

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Embodiment

[0027] In this example, the high-resolution transmission electron microscope image processing process of Shuoli No. 2 coal (SL-2) is illustrated. The verified coal samples include Yujialiang coal (YJL), Aiweiergou coal (AW), and Shuoli No. 3 coal. Coal (SL-3), Shuoli No. 8 coal (SL-8). The degree of metamorphism of YJL, AW, SL-2, SL-3, and SL-8 increases in turn, and the reflectance of vitrinite is 0.60%, 1.13%, 2.45%, 4.77%, and 10.35%, respectively; to test the formula in turn for different coal For grade coal suitability, repeat steps 1,2,3,5.

[0028] Get 5g Shuoli No. 2 coal, and then carry out the following steps:

[0029] In step 1), the original coal sample was crushed and ground to below 200 mesh. After the sample was prepared, a high-resolution transmission electron microscope test was carried out, and the original electron microscope image obtained was subjected to preliminary processing: denoising based on DigitalMicrograph software, binarization by ImageJ softwar...

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Abstract

The invention belongs to the technical field of high-resolution transmission electron microscope testing and image processing in coal chemistry, and particularly relates to a method for quantifying coal lattice stripe length based on HRTEM. The method comprises the following steps: 1) carrying out denoising and binarization processing on an original image of an electron microscope by using DigitalMicrograph and ImageJ software; 2) obtaining the perimeter (C) and the area (S) of a single binarized surface vector diagram by using ArcGIS software; 3) manually scribing to extract lattice fringes to obtain the length (L) of the fringes, and performing weighted average to obtain La; 4) performing multivariable linear fitting on the stripe length (L), the perimeter (C) of the binary surface vector diagram and the area (S) through SPSS Statistics software to obtain a formula: L = 0.3C + S; 5) verifying the accuracy and rationality of the formula, and the result shows that the formula has goodcoincidence degree and high accuracy with manually extracted lattice fringe distribution, greatly reduces the time of the original processing method, improves the efficiency, can be used in the research of coal of different coal grades, and further can be applied to some carbon materials.

Description

technical field [0001] The invention belongs to the technical field of high-resolution transmission electron microscope testing and image processing in coal chemistry, and in particular relates to a method for quantifying the length of coal lattice stripes based on HRTEM. Background technique [0002] The study of coal structure is the premise of rational utilization of coal, the basis of developing and optimizing coal chemical technology, and it is of great significance in coal coking or adsorption / desorption of coal bed methane. The basic structural units (Basic Structural Units, BSU) of coal macromolecules are formed by the interaction between the aromatic structure systems of coal macromolecules. This basic structural unit is also an entry point for understanding how coal macromolecules form aggregated structures. Due to the complex microstructure of coal, many analytical techniques, including vitrinite reflectance anisotropy (birefringence), directional static solid-sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04G01N23/20008G06K9/62G06T7/49G06T7/62
CPCG01N23/04G01N23/20008G06T7/49G06T7/62G06T2207/10061G06F18/24
Inventor 王绍清王小令陈昊常方哲
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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