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JJG 930-2021 English PDF

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JJG 930-2021: Pile Dynamic Measuring Instruments
Status: Valid

JJG 930: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 930-2021	English	339	Add to Cart	4 days [Need to translate]	Pile Dynamic Measuring Instruments	Valid	JJG 930-2021
JJG 930-1998	English	439	Add to Cart	3 days [Need to translate]	Verification Regulation of Pile Dynamic Measuring Instrument	Obsolete	JJG 930-1998

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Basic data

Standard ID	JJG 930-2021 (JJG930-2021)
Description (Translated English)	Pile Dynamic Measuring Instruments
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A53
Word Count Estimation	17,154
Issuing agency(ies)	State Administration for Market Regulation

JJG 930-2021: Pile Dynamic Measuring Instruments

---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.
Pile Dynamic Measuring Instruments National Metrological Verification Regulations of the People's Republic of China Foundation pile dynamic measuring instrument Released on 2021-07-28 2022-01-28 implementation Issued by the State Administration for Market Regulation Verification Regulations of Foundation Pile Dynamic Measuring Instrument Replace JJG 930-1998 Focal point. National Technical Committee of Vibration and Shock Speed Measurement Drafting unit. Hubei Institute of Metrology and Testing Technology China Institute of Metrology National Quality Inspection Center for Nondestructive Equipment Testing (Hubei) China Testing Technology Research Institute This regulation entrusts the National Technical Committee of Vibration and Shock Speed Measurement to be responsible for the interpretation Drafters of this regulation. Chen Yanming (Hubei Institute of Metrology and Testing Technology) Cai Chenguang (Chinese Academy of Metrology) Yao Qiuping [National Quality Inspection Center for Nondestructive Equipment Testing (Hubei)] Xu Aihua (Hubei Institute of Metrology and Testing Technology) Zhang Bing (China Academy of Testing Technology)

Introduction (Ⅱ) 1 Scope (1) 2 Reference documents (1) 3 Overview (1) 4 Measurement performance requirements (1) 4.1 Acceleration measurement system of dynamic measuring instrument (1) 4.2 Strain measuring system of dynamic measuring instrument (1) 4.3 Impact force measurement system of dynamic tester (2) 4.4 Time indication error of dynamic tester (2) 4.5 Frequency indication error of dynamic tester (2) 4.6 System noise voltage of dynamic tester (2) 4.7 Dynamic range of dynamic tester (2) 4.8 Channel consistency error of dynamic tester (2) 5 General technical requirements (2) 5.1 Appearance (2) 5.2 Other technical requirements (2) 6 Measuring instrument control (2) 6.1 Verification conditions (2) 6.2 Verification items (3) 6.3 Verification method (4) 6.4 Processing of verification results (10) 6.5 Verification cycle (10) Appendix A. The format of the inner page of the verification certificate (11) Appendix B Inner Page Format of the Verification Result Notice (12)

Introduction

This regulation is compiled in accordance with the requirements and format of JJF1002-2010 "Rules for the Compilation of National Metrological Verification Regulations". Refer to GB/T 20485.21-2007 "Vibration and shock sensor calibration method Part 21.Vibration comparison Method Calibration", GB/T 20485.22-2008 "Vibration and Shock Sensor Calibration Method Part 22.Shock Comparison Method Calibration" and JG/T 518-2017 "Pile Dynamic Measuring Instrument" compared JJG 930-1998 "Pile Dynamic Measuring Instrument" Revised. Compared with JJG 930-1998, in addition to editorial changes, the main technical changes are as follows. ---Added the introduction; ---Added scope, reference documents, and general technical requirements; ---Move the contents of the original appendix 1 to the control of measuring instruments; ---Modified the content of the original Appendix 2 and changed it to Appendix A; ---Modified the verification content of the strain measurement system; ---Deleted the measurement of speed and dynamic force system reference sensitivity and related content; ---Increase the verification content of the impact force measurement system; ---Deleted the verification content of the interference between the channels of the dynamic measuring instrument; --- Deleted the time domain and frequency domain amplitude verification content of the dynamic measuring instrument; ---Deleted the content of calculus and integral amplitude verification of dynamic measuring instrument; ---In accordance with the requirements of JJF1002-2010, the format of the inner pages of the verification certificate/verification result notice has been modified. The previous releases of this regulation are as follows. ---JJG 930-1998. Verification Regulations of Foundation Pile Dynamic Measuring Instrument

1 Scope

This regulation is applicable to the initial verification, subsequent verification and in-use inspection of the foundation pile dynamic measuring instrument.

2 Reference documents

The following documents are cited in this regulation. JJG 676 Vibration Tester JJF1001-2011 General measurement terms and definitions JJF1156-2006 Vibration impact speed measurement terms and definitions GB/T 20485.1-2008 Vibration and shock sensor calibration method Part 1.Basic concepts JG/T 518-2017 Foundation pile dynamic measuring instrument For dated reference documents, only the dated version applies to this regulation; for undated references The latest version (including all amendments) is applicable to this regulation.

3 overview

The pile dynamic measuring instrument (hereinafter referred to as the dynamic measuring instrument) is a low-strain or high-strain foundation pile detection method. The vibration is measured under the load and analyzed, and the vertical compressive bearing capacity of the engineering foundation pile and the integrity of the pile body are checked. Measuring instrument. The measuring system of the dynamic measuring instrument can be divided into three types. acceleration, strain and impact force according to the different physical quantities to be measured. Subsystem.

4 Measurement performance requirements

4.1 Acceleration measurement system of dynamic measuring instrument 4.1.1 Reference sensitivity of acceleration measurement system The relative extended uncertainty of the system reference sensitivity Urel (k=2) should be better than 3.0%. 4.1.2 Amplitude-frequency response characteristics of acceleration measurement system In the frequency range of (2~5000) Hz, the sensitivity of the acceleration measurement system of the dynamic measuring instrument changes compared with the reference point ±10% frequency range. 4.1.3 Amplitude linear error of acceleration measurement system The amplitude linearity error of the acceleration measurement system should be better than ±5%. 4.2 Strain measuring system of dynamic measuring instrument 4.2.1 Amplitude linear error of strain sensor The amplitude linearity error of the strain sensor should be better than ±0.5%FS. 4.2.2 Amplitude-frequency response characteristics of strain measurement system The upper limit of the amplitude-frequency response range of the strain measurement system sensitivity of the dynamic tester is ±10% from the reference point.

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