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GB/T 44355-2024Automatic determination of maceral group composition in coal —Image analysis method (English PDF)

煤的显微组分组含量自动测定图像分析法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 23, 2024

Implementation date

March 1, 2025

Scope

GB/T 44355-2024 is the English-translated version of 煤的显微组分组含量自动测定图像分析法.

GB/T 44355-2024 is the Chinese national standard covering automatic determination of maceral group composition in coal, Image analysis method. Issued on 23 August 2024, it has been in force since 1 March 2025.

Document preview — GB/T 44355-2024

National Standard of the People's Republic of China

ICS: 73.040
Classification: D 26

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Method Summary2
5 Materials2
5.1 Sample installation materials2
5.2 Oil immersion liquid2
6 Instruments, Equipment and Test Systems2
6.1 Reflected light microscope2
6.2 Digital programmable adjustable power supply2
6.3 Automatic stage2
6.4 Microscope Camera3
6.5 Image Acquisition System3
6.6 Automatic identification and determination system for microscopic components3
6.7 Leveler3
7 Sample preparation3
8 Measurement steps3
8.1 Instrument Preparation and Adjustment3
8.2 Automatic Image Acquisition4
8.3 Image Import4
8.4 Image Preprocessing4
8.5 Microscopic group identification and statistics4
9 Result calculation4
10 Method precision5
11 Measurement Report5
Appendix A (Informative) Automatic determination report of the content of coal microscopic components6
References7

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting is required.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by the China Coal Industry Association.

This document is under the jurisdiction of the National Technical Committee on Coal Standardization (SAC/TC 42).

This document was drafted by: China Coal Technology and Engineering Xi'an Research Institute (Group) Co., Ltd. and China Coal Science and Technology Research Institute Co., Ltd.

The main drafters of this document are: Song Xiaozhong, Xiao Wenzhao, Bai Xiangfei, Liu Shande, Lei Ying, Ding Hua, Pi Zhongyuan, Fan Zhangqun, Wu Linlin, Tang Shan.

Automatic determination of the content of microscopic components in coal Image analysis

1 Scope

This document describes a method for the automated determination of the microscopic grouping of coal using image processing techniques in a reflected light microscope.

This document is applicable to bituminous coal, lignite and anthracite of a single coal seam or a single type of coal for reference.

2 Normative references

GB/T 12937

GB/T 15588

GB/T 16773

GB/T 20733

GB/T 22063

GB/T 29298

3 Terms and definitions

The terms and definitions defined in GB/T 12937, GB/T 15588 and GB/T 20733 and the following apply to this document.

3.1 microscope camera

The image sensor is connected to the microscope through a dedicated interface and has the function of outputting microscope imaging digital signals, and is connected to the microscope through a data interface.

A camera connected to a computer that records the signal on a storage medium.

3.2 pixel

A physical unit on an image sensor that is able to sense light independently.

3.3 Motorized stage

A microscope stage that moves automatically along the X, Y, and Z axes controlled by a computer program.

3.4 Image acquisition system

A computer control system that can drive both the microscope automatic stage and the microscope camera.

Note. Includes automatic stage, image acquisition device and its driving software.

3.5 Microscopic image

A digital image taken by a microscope camera imaging a sample under a microscope objective.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 12937 · GB/T 16773 · GB/T 20733 · GB/T 22063

Cited by

GB/T 46291-2025General rules of coal petrographic analysis

Editions of GB/T 44355

Edition	Title	Revision	Status
GB/T 44355-2024	Automatic determination of maceral group composition in coal - Image analysis method	current edition	Current

This page sells the current edition, GB/T 44355-2024. Earlier editions are listed for reference only.

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