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JJG 1178-2021 English PDF

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JJG 1178-2021: Human Vibration Meters
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Standard similar to JJG 1178-2021

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Basic data

Standard ID JJG 1178-2021 (JJG1178-2021)
Description (Translated English) Human Vibration Meters
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A53
Word Count Estimation 33,394
Issuing agency(ies) State Administration for Market Regulation

JJG 1178-2021: Human Vibration Meters

---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.
(Human Vibration Meter Verification Procedure) People's Republic of China National Metrological Verification Regulations Human Vibration Meter 2022-04-18 Implementation Released by the State Administration for Market Regulation Human Vibration Meter Verification Regulations VibrationMeters Focal Point. National Technical Committee of Vibration and Shock Speed Measurement Main drafting unit. China Institute of Metrology Participating in the drafting unit. Shaanxi Institute of Metrology Hangzhou Aihua Instrument Co., Ltd. Zhejiang Institute of Metrology This regulation entrusts the National Technical Committee of Vibration and Shock Speed Measurement to be responsible for the interpretation The main drafters of this regulation. Yang Lifeng (China Institute of Metrology) Yu Mei (China Institute of Metrology) Participating drafters. Zheng Huihui (Shaanxi Institute of Metrology) Zhang Ning (Hangzhou Aihua Instrument Co., Ltd.) Yao Lei (Zhejiang Institute of Metrology)

content

Introduction (Ⅱ) 1 Scope(1) 2 References (1) 3 Terms and units of measurement(1) 4 Overview(2) 5 Measurement performance requirements (2) 5.1 Acceleration indication error under reference conditions (2) 5.2 Acceleration frequency weighted response(3) 5.3 Linearity deviation of acceleration amplitude (3) 6 General technical requirements (3) 7 Measuring Instrument Control(3) 7.1 Verification Conditions (3) 7.2 Verification items (4) 7.3 Verification method (4) 7.4 Verification result processing (9) 7.5 Verification Period(9) Appendix A Frequency Weighting Value and Maximum Allowable Error of Human Vibration Meter (10) Appendix B Frequency Weighting Factor Calculation Method(21) Appendix C Verification Certificate Inner Page Format (23) Appendix D Format of Inner Page of Verification Result Notification Letter (27)

Introduction

This regulation is compiled according to JJF1002-2010 "Rules for Compilation of National Metrological Verification Regulations". The main measurement of this regulation The performance refers to GB/T 23716-2009 "Human Body Response Measurement Instrument", GB/T 20485.11-2006 "Vibration and Shock Sensor Calibration Method Part 11.Absolute Calibration of Vibration by Laser Interferometry", GB/T 20485.21-2007 "Vibration and Shock Sensor Calibration Method Part 21.Vibration Comparison Method Calibration" and ISO 8041-1.2017 "Instruments for measuring the response of the human body to vibration - Part 1.General purpose vibration meter vibrationmeters" OK. This regulation is published for the first time. Human Vibration Meter Verification Regulations

1 Scope

This regulation is applicable to hand-transmitted vibration, whole-body vibration and low The initial verification, subsequent verification and in-use inspection of the human vibrometer with high frequency whole-body vibration. This regulation does not apply to Verification of human body vibration meter with body rotation vibration function.

2 Reference documents

This procedure cites the following documents. JJF1156 Terms and Definitions of Vibration Shock Speed Measurement GB/T 20485.11-2006 Vibration and shock sensor calibration method Part 11.Laser interferometry vibration Dynamic absolute calibration (ISO 16063-11.1999, IDT) GB/T 20485.21-2007 Vibration and shock sensor calibration method-Part 21.Vibration comparison method calibration Standard (ISO 16063-21.2003, IDT) GB/T 23716-2009 Instrument for measuring human body's response to vibration (ISO 8041.2005, IDT) ISO 8041-1.2017 Instruments for measuring the response of the human body to vibrations - Part 1.General-purpose vibration meters (Hu- tionmeters) For dated citations, only the dated version applies to this Regulation; for undated citations The latest version (including all amendments) applies to this regulation.

3 Terminology and units of measurement

aw The root mean square value of the frequency-weighted vibration acceleration in the direction of the specified axis during the specified time interval, in meters per Quadratic second (m/s2). Its expression is. aw= T∫ a2w(ζ)dζ (1) where. aw(ζ)--- in the direction of the specified axis, the weighted vibration acceleration as a function of instantaneous time, m/s2; T---measurement time, s. Lw The ratio of the time-averaged weighted acceleration value to the reference acceleration is the base 10 logarithm multiplied by 20, and the unit is minutes Bezel (dB). Its expression is.

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