GB/T 39643-2020 English PDFUS$669.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 39643-2020: Geometrical product specifications (GPS) - Systematic errors and contributions to measurement uncertainty of length measurement due to thermal influences Status: Valid
Basic dataStandard ID: GB/T 39643-2020 (GB/T39643-2020)Description (Translated English): Geometrical product specifications (GPS) - Systematic errors and contributions to measurement uncertainty of length measurement due to thermal influences Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J04 Classification of International Standard: 17.040.01 Word Count Estimation: 36,343 Date of Issue: 2020-12-14 Date of Implementation: 2021-07-01 Quoted Standard: GB/T 19765; JJF L001; JJF 1059.1 Adopted Standard: ISO/TR 16015-2003, MOD Regulation (derived from): National Standard Announcement No. 28 of 2020 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration Summary: This standard specifies the procedures for determining and correcting errors caused by temperature effects in the length measurement of product geometric specifications (GPS), as well as procedures for evaluating measurement uncertainty components that are caused by temperature effects. This standard applies to length measurement in the industrial field. GB/T 39643-2020: Geometrical product specifications (GPS) - Systematic errors and contributions to measurement uncertainty of length measurement due to thermal influences---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. (Product Geometric Technical Specification (GPS) The source of system error and measurement uncertainty caused by temperature influence in length measurement) ICS 17:040:01 J04 National Standards of People's Republic of China Product Geometric Technical Specification (GPS) The system error and the Source of measurement uncertainty (ISO /T R16015:2003,MOD) 2020-12-14 release 2021-07-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee Table of contentsPreface Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Symbols and abbreviations 6 5 Procedure 8 Appendix A (informative appendix) Temperature and environmental consulting information for length measurement 12 Appendix B (informative appendix) Example of uncertainty introduced by thermal effects in length measurement 28 Appendix C (Informative Appendix) Relationship with GPS Matrix Model 31 References 32ForewordThis standard was drafted in accordance with the rules given in GB/T 1:1-2009: This standard uses the redrafting method to amend and adopt ISO /T R16015:2003 "Geometrical Technical Specifications for Products (GPS) Length Measurement of Medium Temperature The source of system error and measurement uncertainty introduced by the degree of influence": The technical differences between this standard and ISO /T R16015:2003 and the reasons are as follows: ---Regarding normative reference documents, this section has made adjustments with technical differences to adapt to my country's technical conditions and adjustments: The situation is collectively reflected in Chapter 2 "Normative Reference Documents", and the specific adjustments are as follows: ● Replace ISO 1 with GB/T 19765, which is equivalent to the international standard (see Chapter 4); ● Use JJF1001 instead of VIM (see Chapter 3); ● Use JJF1059:1 instead of GUM (see Chapter 3): This standard was proposed and managed by the National Standardization Technical Committee for Product Geometric Technical Specifications (SAC/TC240): Drafting organizations of this standard: Anji Asia-Pacific Brake System Co:, Ltd:, China Academy of Metrology, Shanghai Institute of Metrology and Testing Technology, CMC Productivity Promotion Center, Chongqing Institute of Metrology Quality Inspection, Shandong University of Technology, Shaanxi Institute of Metrology: The main drafters of this standard: Wang Weinong, Wei Hengzheng, Shi Ruikang, Ren Yu, Chen Long, Xu Jian, Li Dongxing, Mao Bin, Zhu Yue:IntroductionThis standard is one of the general GPS standards in the product geometric technical specification (GPS) series (see GB/T 20308): It involves standard D, E, F and G links: The uncertainty of temperature measurement and the measurement deviation from the standard reference temperature will introduce uncertainty in the length measurement results: In addition, partial Measurements away from the standard reference temperature will cause systematic errors in the measurement results: The basis of this standard is that most materials will expand or contract when the temperature changes: If the temperature during measurement is Quasi-reference temperature, the nominal thermal expansion is zero, but the uncertainty of temperature measurement will introduce the uncertainty of the measurement result: If the length measurement is not Performing at the standard reference temperature will result in a difference in thermal expansion: When using a working standard to adjust a measuring instrument, or use a measuring instrument to measure This phenomenon can happen when working on a workpiece: If the temperature and thermal response of the workpiece, working standard, and measuring instrument are known, the difference in thermal expansion can be corrected: Because it is impossible Know the temperature and thermal response accurately, so there will be uncertainty in the correction and measurement results: This standard gives the relevant system error calculation method Method, and the method of evaluating the measurement uncertainty introduced by temperature: The standard uncertainty due to thermal effects should be expressed in a general way (see JJF1059:1) to evaluate the composite standard Certainty: When necessary, appropriate judgment rules can be adopted for the dimensional uncertainty caused by temperature, for example, an acceptable workpiece tolerance Proportion, or implement the provisions of GB/T 18779:1 to ensure that the compliance of the workpiece size can be judged: This standard is based on GB/T 19765 and is consistent with GB/T 24637:2: At the time of publication of this standard, we have tried our best to achieve this a little: Product Geometric Technical Specification (GPS) The system error and the Source of measurement uncertainty1 ScopeThis standard specifies the procedures for determining and correcting errors caused by temperature effects in the length measurement of product geometric specifications (GPS), and Procedure for evaluating the measurement uncertainty component introduced by temperature influence: This standard applies to length measurement in the industrial field: Note 1: The temperature influence includes: the average temperature is the standard reference temperature; the average temperature is not the standard reference temperature, and the average value takes into account changes in time and space; temperature The degree changes over time: Note 2: Three situations need to be considered: the average temperature is the standard reference temperature; the average temperature is not the standard reference temperature, and the user should correct it; the average temperature is not the standard The reference temperature is not corrected by the user: Note 3: According to the analysis of GB/T 18779:2, thermal effect is an important factor causing measurement uncertainty and forming systematic errors: This standard is more professional The detailed temperature influence analysis clarifies that temperature influence is an important source of measurement uncertainty and an important factor in the formation of systematic errors: Although not The temperature gradient is discussed in detail, but some information is provided in Appendix A:2 Normative referencesThe following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: GB/T 19765 Product Geometrical Technical Specification (GPS) Product Geometrical Technical Specification and Standard Reference Temperature for Inspection (GB/T 19765-2005, ISO 1:2002, IDT) JJF1001 General measurement terms and definitions JJF1059:1 Evaluation and expression of measurement uncertainty3 Terms and definitionsThe following terms and definitions defined by JJF1059:1 and JJF1001 apply to this document: For ease of use, the following is repeated Some terms and definitions in JJF1001 have been modified: 3:1 Terms related to thermal expansion coefficient 3:1:1 Coefficient of thermal expansion coefficientofthermalexpansion The ratio of length change rate to temperature change: Note 1: Generally speaking, this coefficient is a function of temperature: For the purpose of this standard, the average value of a temperature range is used, as in formula (1) α20,T() = LT -L20 L20(T-20) (1) ...... |
