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DBT90-2022: (Verification Regulations for Invar Leveling Staff)
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| DB/T 90-2022 | English | 879 |
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(Verification Regulations for Invar Leveling Staff)
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DB/T 90-2022
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Basic data | Standard ID | DB/T 90-2022 (DB/T90-2022) | | Description (Translated English) | (Verification Regulations for Invar Leveling Staff) | | Sector / Industry | Chinese Industry Standard (Recommended) | | Classification of Chinese Standard | P15 | | Classification of International Standard | 91.120.25 | | Word Count Estimation | 40,432 | | Date of Issue | 2022-12-29 | | Date of Implementation | 2023-05-01 | | Issuing agency(ies) | China Earthquake Administration | DBT90-2022: (Verification Regulations for Invar Leveling Staff)---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.
ICS 91.120.25
CCSP15
Seismic Industry Standard of the People's Republic of China
Verification Regulations for Invar Leveling Staff
Released on 2022-12-29
2023-05-01 implementation
Released by the China Earthquake Administration
table of contents
Preface I
Introduction II
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Overview 1
5 Metrological performance requirements 2
6 General technical requirements 2
7 Measuring instrument control 3
Appendix A (Informative) Verification Record and Calculation Example of Invar Scale Reticle Bending Difference 8
Appendix B (Informative) Verification Record and Calculation Example of the Perpendicularity between the Central Axis and the Bottom of the Invar Scale 9
Appendix C (Normative) Calibration method of a pair of Invar scale zero difference standard device 10
Appendix D (informative) A pair of line ruler zero point difference and Kiev difference constant error verification record and calculation example 12
Appendix E (Normative) A pair of line ruler base-auxiliary difference constant error standard device verification method 13
Appendix F (Normative) A pair of line ruler meter length correction factor and division standard deviation full sampling verification method 14
Appendix G (Normative) A pair of line ruler meter length correction factor and division standard deviation partial sampling test method 17
Appendix H (Normative) A pair of bar code ruler meter length correction factor and standard deviation full sampling test method 22
Appendix I (Normative) A pair of barcode ruler meter length correction factor and standard deviation part of the sampling test method 24
Appendix J (Normative) Invar Scale Verification Certificate and Verification Result Notice Verification Result Page Format 33
Reference 35
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.
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by the China Earthquake Administration.
This document is under the jurisdiction of the Earthquake Monitoring and Forecasting Standardization Technical Committee.
This document is drafted by. China Earthquake Administration Second Monitoring Center, China Earthquake Administration First Monitoring Center.
The main drafters of this document. Luo Guande, Zhong Yu, Min Xuepeng, Cheng Zengjie, Tao Maosheng, Huang Zhi, Li Yajuan, Lu Xiong, Meng Qingxiao.
Introduction
In recent years, bar-coded Invar leveling scales have been widely used in leveling surveys, especially in earthquake deformation monitoring. Its main technical indicators "ruler per
The meter length correction factor" and "scale division error standard deviation" affect the accuracy, consistency, and reliability of the measurement data, which in turn affects the deformation seismic analysis.
analysis forecast. In the current technical standard, JJG8-1991 does not cover the verification of the barcode Invar leveling staff, JJG (Survey and Mapping) 2102-2013
It is not suitable for seismic deformation monitoring needs, and the seismic industry needs to formulate standards that meet the needs of the industry.
This document combines the key content requirements of JJF1002-2010, with reference to the experimental results and current similar standards, to determine the verification conditions, general
Technical requirements, the measurement performance requirements, verification methods, verification records and calculation examples of the Invar leveling rod are given. For ease of understanding and use, the
In JJG8-1991, the two verification items of "the difference between the average length of the scale meter interval and the nominal value" and "the marking standard deviation of the division" were renamed
"Correction factor per meter length of scale" and "standard deviation of scale division error", and redefine the definitions of these two terms.
Verification Regulations for Invar Leveling Staff
1 Scope
This document specifies the verification conditions, verification items, measurement performance requirements of each item and
Test method.
This document is applicable to the initial verification and subsequent verification of the Invar scale for seismic leveling and the verification of the Invar scale for other leveling surveys
It can be used for reference.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document.
JJF1001-2011 general measurement terms and definitions
3 Terms and Definitions
The following terms and definitions defined in JJF1001-2011 apply to this document.
3.1
A measurement system that uses laser interferometers as measurement standards for displacement measurement.
Note. Hereinafter referred to as standard device.
3.2
The deviation between the measured length and its nominal length between two divisions or two yards of the Invar scale, measured using a standard device.
3.3
The amount that characterizes the dispersion of measurement results for each division error of the Invar scale.
Note. Hereinafter referred to as the divisional standard deviation, it is represented by the symbol m.
3.4
A numerical factor that is multiplied by the nominal length of the Invar scale to compensate for the systematic error per meter of length.
Note. Hereinafter referred to as the meter length correction factor, the unit is millimeter per meter (mm/m), represented by the symbol f.
4 Overview
The Invar ruler is a measuring instrument that cooperates with the level to measure the height difference and provides the length value for the level. It is mainly composed of the Invar material tape,
The ruler body is made of aluminum alloy or wood, and the ruler tape is fixed on the ruler body with a certain tension by a spring; the Invar ruler is divided into lines according to its division form.
There are two types of type and bar code type (see Figure 1). the line type Invar ruler (hereinafter referred to as the line ruler) is engraved with two columns of 5mm or 10mm on the left and right, etc.
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