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GB/T 21649.2-2025 English PDF

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GB/T 21649.2-2025: Particle size analysis - Image analysis methods - Part 2: Dynamic image analysis methods
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GB/T 21649.2: Evolution and historical versions

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GB/T 21649.2-2025English1064 Add to Cart 7 days [Need to translate] Particle size analysis - Image analysis methods - Part 2: Dynamic image analysis methods Valid GB/T 21649.2-2025
GB/T 21649.2-2017English340 Add to Cart 0--9 seconds. Auto-delivery Particle size analysis -- Image analysis methods -- Part 2: Dynamic image analysis methods Valid GB/T 21649.2-2017

PDF similar to GB/T 21649.2-2025


Standard similar to GB/T 21649.2-2025

GB/T 6003.2   GB/T 6003.1   GB/T 19077   GB/T 21649.1   GB/T 21648   GB/T 21650.3   

Basic data

Standard ID GB/T 21649.2-2025 (GB/T21649.2-2025)
Description (Translated English) Particle size analysis - Image analysis methods - Part 2: Dynamic image analysis methods
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A28
Classification of International Standard 19.120
Word Count Estimation 53,525
Date of Issue 2025-06-30
Date of Implementation 2026-01-01
Older Standard (superseded by this standard) GB/T 21649.2-2017
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 21649.2-2025: Particle size analysis - Image analysis methods - Part 2: Dynamic image analysis methods


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ICS 19.120 CCSA28 National Standard of the People's Republic of China Replaces GB/T 21649.2-2017 Particle size analysis image analysis method Part 2.Dynamic image analysis (ISO 13322-2.2021, IDT) Released on June 30, 2025 Implementation on January 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms, Definitions and Symbols 2 3.1 Terms and Definitions 2 3.2 Symbol 4 4 Principle 5 4.1 Key Components of a Dynamic Image Analyzer 5 4.2 Lighting 7 4.3 Particle Movement 8 4.4 Particle Positioning 8 4.5 Optical System 10 4.6 Image Acquisition Device 10 4.7 Image Analysis Methods 11 4.8 Important Particle Descriptor Conversion 13 4.9 Statistical representation of particle descriptors 13 4.10 Particle Dispersion Technology 13 4.11 System calibration involving setting characteristics 13 5 Operating Procedures 14 5.1 Overview 14 5.2 Instrument Setup and Calibration 14 5.3 Distributed Systems 16 5.4 Operation Confirmation 17 5.5 Image Enhancement Algorithms 17 5.6 Measurement 18 6 Sample Preparation 18 6.1 Sample division and reduction 18 6.2 Adhesion particles 18 6.3 Number of particles to be measured 19 7 Accuracy and Instrument Validation 19 7.1 General Principles 19 7.2 Accuracy 19 7.3 Repeatability 20 7.4 Period Precision 20 8 Test Report 21 8.1 General Principles 21 8.2 Sample 21 8.3 Dispersion 21 8.4 Image analysis instruments 22 8.5 Analyst Identification Information 22 Appendix A (Informative) Theoretical Background 23 Appendix B (informative) Comparison between number-based and volume-based particle size distributions 26 Appendix C (Informative) Recommended Particle Velocity and Exposure Time 27 Appendix D (Informative) Dependence of Particle Size on Threshold Selection 30 Appendix E (Normative) Standard Sample Requirements 33 Appendix F (Informative) Reliability and Durability of Image Analysis Methods 36 Appendix G (Informative) Optional Methods 38 Appendix H (Informative) Typical Examples of Sample Injection and Image Acquisition Systems 39 Appendix NA (Informative) Dynamic Image Method Application Examples 46 Reference 47 Preface 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. This document is Part 2 of GB/T 21649 Particle size analysis - Image analysis method. GB/T 21649 has been published in the following parts. --- Part 1.Static image analysis method; --- Part 2.Dynamic image analysis method. This document replaces GB/T 21649.2-2017 "Particle size analysis - Image analysis method - Part 2.Dynamic image analysis method" and Compared with GB/T 21649.2-2017, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application has been changed (see Chapter 1); b) Added some terms and deleted the term "depth of field" (see Chapter 3, 3.1.6 of the.2017 edition); c) Added some symbols (see 3.2); d) Added descriptions of key components and reflected light mode (see 4.1); e) Added equipment control requirements (see 4.2 to 4.11); f) Added control requirements for operating procedures (see Chapter 5); g) Added control requirements for sample preparation (see Chapter 6); h) Added requirements on the accuracy and equipment qualification of the use of particle standard samples (see Chapter 7); i) Added test report requirements (see Chapter 8). This document is equivalent to ISO 13322-2.2021 "Particle size analysis - Image analysis method - Part 2.Dynamic image analysis method". The following minimal editorial changes have been made to this document. a) Changed the expression of “Figure 5 Image analysis process”; b) Added informative appendix NA “Application Examples of Dynamic Image Method”. 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 and coordinated by the National Technical Committee for Particle Characterization and Sorting and Screen Standardization (SAC/TC168). This document was drafted by. Sinopec Petrochemical Research Institute Co., Ltd., China Machinery Research Institute of Standards and Technology (Beijing) Co., Ltd., Verde (Shanghai) Instruments Co., Ltd., Wenling Luogang Machinery Co., Ltd., Hunan University, Shandong Naket Analytical Instruments Co., Ltd., Liaoning Zhongke Lile Testing Technology Service Co., Ltd., Shanghai Zhixin Biotechnology Co., Ltd., China National Institute of Metrology, Zhuhai Zhenliguang Scientific Instrument Co., Ltd., China Jiliang University, Zhejiang Ruitang Plastic Technology Co., Ltd., Dandong Better Instrument Co., Ltd., Lihua Lianke (Beijing) Instrument Technology Co., Ltd. and Jinan Micro-Nano Particle Instrument Co., Ltd. The main drafters of this document are. Li Mingzhe, Zhang Yongfen, Hou Changge, Wang Ruiqing, Liu Yaqun, Xu Ling, Yu Daijun, Gou Yangyang, Luo Zhengzhe, Zhang Fugen, Zhu Peiwu, Wen Yuan, Wang Chunming, Zhou Yong, Guo Yaoqing, Wang Zijian, Wang Jieguang, Cai Xiaoyang, Yang Zhenghong, Liu Junjie, and Ren Fei. This document was first published in.2017 and this is the first revision.

introduction

GB/T 21649 "Image analysis method for particle size analysis" provides several typical image acquisition methods suitable for determining particle size distribution. Image analysis consists of the following two parts. --- Part 1.Static image analysis method. It specifies the time when the particle velocity to be measured is zero relative to the axis velocity of the optical system of the imaging device. Image analysis method for the purpose of determining particle size distribution. This method only stipulates the analysis of images by complete pixel counting method. method. --- Part 2.Dynamic image analysis method. Specifies the method for transferring images from particles with relative motion to binary images in a real system. A method of producing an image in which the particles in the image are individually separated. GB/T 21649.1 characterizes stationary particles, with high image accuracy, but relatively few particles; this document characterizes moving particles. Particles can be measured in larger numbers, but particle movement will cause image blur and affect analysis accuracy. This document provides guidance on the use of graphical analysis to measure and describe the particle size distribution of moving particles. Or effectively disperse and focus particles in the gas, collect static images of moving particles, and analyze the images. Particle size analysis image analysis method Part 2.Dynamic image analysis 1 Scope This paper describes a method for converting particles with relative motion into binary images in a practical system, where the The particles are separated into individual particles. The image of the moving particles is created by an optical image acquisition device. The effect of particle motion on the image can be The instrument is minimized or calibrated by a software program. This file is suitable for images of moving particles that are clearly distinguishable from the background. Subsequent analysis In this paper, these binary images can be regarded as static images, and their representation methods are shown in GB/T 21649.1-2024.Compared with the static image analysis system, dynamic image analysis is more convenient. This document provides guidance for the qualification of particle size distribution measurement instruments using particle standard samples. This document discusses in detail the relative motion of particles, the effect of particle motion on the image (motion blur), the movement and position of particles along the optical axis, The position (depth of field) and the direction of movement of the particles relative to the camera. 2 Normative references The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. Note. GB/T 15445.1-2008 Presentation of particle size analysis results Part 1.Graphical representation (ISO 9276-1.1998, IDT) ISO 9276-2 Presentation of results of particle size analysis Part 2.Calculation of mean particle size/diameter and moments from particle size distribution Note. GB/T 15445.2-2006 Presentation of particle size analysis results Part 2.Calculation of mean particle size/diameter and moments from particle size distribution (ISO 9276- 2.2001,IDT) ISO 9276-6 Presentation of results of particle size analysis — Part 6.Qualitative and quantitative description of particle shape and morphology Note. GB/T 15445.6-2014 Presentation of particle size analysis results Part 6.Qualitative and quantitative description of particle shape and morphology (ISO 9276-6. 2008, IDT) Note. GB/T 21649.1-2024 Particle size analysis - Image analysis method - Part 1.Static image analysis method (ISO 13322-1.2014, IDT) Note. GB/T 27025-2019 General requirements for the competence of testing and calibration laboratories (ISO /IEC 17025.2017, IDT)

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