GB/T 26958.21-2020Geometrical product specifications (GPS). Filtration - Part 21: Linear profile filters: Gaussian filters (English PDF)

Foreword

GB/T 26958 "Geometric Technical Specifications for Products (GPS) Filtering" is divided into 89 parts, and the following 12 parts have been released:

---Part 1: Overview and basic concepts;

---Part 20: Basic concepts of linear contour filters;

---Part 21: Linear contour filter Gaussian filter;

---Part 22: Linear contour filter spline filter;

---Part 28: End effect of contour filter;

---Part 29: Linear contour filter spline wavelet;

---Part 30: Basic concepts of robust contour filter;

---Part 31: Robust contour filter Gaussian regression filter;

---Part 32: Robust contour filter spline filter;

---Part 40: Basic concepts of morphological contour filter;

---Part 41: Morphological contour filter disc and horizontal line segment filter;

---Part 49: Morphological contour filter scale space technology:

This part is part 21 of GB/T 26958:

This section was drafted in accordance with the rules given in GB/T 1:1-2009:

The translation method used in this part is equivalent to the ISO 16610-21:2011 "Geometric Technical Specification for Products (GPS) Filtering Part 21: Line

Characteristic contour filter Gaussian filter:

The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows:

---JJF1001-2011 General measurement terms and definitions (ISO /IEC Guide99:2007, MOD);

---JJF1059:1-2012 Measurement Uncertainty Evaluation and Expression (ISO /IEC Guide98-3:2008, MOD):

This section has made the following editorial changes:

---Rewrite Appendix D in accordance with the requirements of GB/T 20308-2020:

This part is proposed and managed by the National Standardization Technical Committee for Product Geometric Technical Specifications (SAC/TC240):

Drafting organizations of this section: Huazhong University of Science and Technology, Shaanxi Weir Mechanical and Electrical Technology Co:, Ltd:, Beijing Times Peak Technology Co:, Ltd:, Shandong Road

First is Intelligent Technology Co:, Ltd:, Shanghai Institute of Metrology and Testing Technology, CMC Productivity Promotion Center, Jiangsu Ruijing Optoelectronics Research Institute Co:, Ltd:

the company:

1 Scope

This part of GB/T 26958 specifies the metrological characteristics of Gaussian filters for contour filtering, and gives the long wave and

Shortwave component method:

This section applies to the extraction of surface profile roughness features, and other signal filtering and analysis occasions can be used as a reference:

2 Normative references

The 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 /Z 26958:1-2011 Product Geometric Technical Specification (GPS) Filtering Part 1: Overview and Basic Concepts (ISO /

TS16610-1:2006, IDT)

GB /Z 26958:20-2011 Geometric Technical Specifications for Products (GPS) Filtering Part 20: Basic Outline of Linear Contour Filter

Read (ISO /T S16610-20:2006, IDT)

ISO /IEC Guide 98-3:2008 Measurement Uncertainty Evaluation and Expression [Uncertaintyofmeasurement-Part 3:Guide

totheexpressionofuncertaintyinmeasurement(GUM:1995)]

ISO /IEC Guide 99:2007 General Metrology Terms and Definitions [Internationalvocabularyofmetrology-Basicand

generalconceptsandassociatedterms(VIM)]

3 Terms and definitions

The terms and definitions defined in GB /Z 26958:1, GB /Z 26958:20, ISO /IEC Guide 98-3 and ISO /IEC Guide 99 are applicable to

This document: For ease of use, some terms and definitions in GB /Z 26958:1 and GB /Z 26958:20 are listed repeatedly below:

3:1

Linear profile filter linearprofilefilter

A contour filter that divides the contour into long wave and short wave components:

[GB /Z 26958:20-2011, definition 3:1]

3:2

Openprofile openprofile

A surface profile with two end points and a finite length:

[GB /Z 26958:1-2011, definition 3:7]

3:3

Closedprofile

Surface profile with no endpoints and limited length:

[GB /Z 26958:1-2011, definition 3:8]