JJG 1182-2021 English PDF

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JJG 1182-2021: Verification Regulation of Vector Hydrophones in the Frequency Range 20 Hz to 1 kHz
Status: Valid

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Similar standards

GB/T 3222.2   GB/T 3222.1   JJG 188   JJG 1190   JJG 1175   JJF 1182   

Basic data

Standard ID: JJG 1182-2021 (JJG1182-2021)
Description (Translated English): Verification Regulation of Vector Hydrophones in the Frequency Range 20 Hz to 1 kHz
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A59
Classification of International Standard: 17.140
Word Count Estimation: 19,165
Date of Issue: 2021-12-28
Date of Implementation: 2022-06-28
Issuing agency(ies): State Administration for Market Regulation
Summary: This standard applies to the initial verification, subsequent verification and in-use inspection of vector hydrophones used in the frequency range of 20Hz~1kHz. For the type of vector hydrophone containing sound pressure channels, this standard is only applicable to the verification of its vector channels.

JJG 1182-2021: Verification Regulation of Vector Hydrophones in the Frequency Range 20 Hz to 1 kHz

---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.
National Metrology Verification Regulations of the People's Republic of China 20Hz~1kHz vector hydrophone Released on 2021-12-28 2022-06-28 Implementation Released by the State Administration for Market Regulation 20Hz~1kHz vector hydrophone Verification Regulations Responsible unit: National Acoustic Metrology Technical Committee Main drafting unit: The 715th Research Institute of China Shipbuilding Industry Corporation Participating in the drafting unit: Institute of Acoustics, Chinese Academy of Sciences Harbin Engineering University This regulation entrusts the National Acoustic Metrology Technical Committee to be responsible for interpretation The main drafters of this regulation: Fei Teng (The 715th Research Institute of China Shipbuilding Industry Corporation) Jia Guanghui (No:715 Research Institute of China Shipbuilding Industry Corporation) Zhao Han (No:715 Research Institute of China Shipbuilding Industry Corporation) Participating drafters: Mo Xiping (Institute of Acoustics, Chinese Academy of Sciences) Chen Hongjuan (Harbin Engineering University)

Table of contents

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 Terms and units of measurement(1) 3:1 Particle acceleration sensitivity (1) 3:2 Particle acceleration sensitivity level (1) 3:3 Particle velocity sensitivity (1) 3:4 Sensitivity level of particle velocity (2) 3:5 Particle displacement sensitivity (2) 3:6 Particle displacement sensitivity level(2) 3:7 Frequency Response of Sensitivity Level(2) 3:8 Axial Sensitivity Asymmetry(2) 3:9 Transverse rejection ratio(2) 4 Overview(2) 5 Metrological performance requirements (2) 5:1 Sensitivity levels(2) 5:2 Frequency Response of Sensitivity Level(3) 5:3 Directivity(3) 6 General technical requirements (3) 6:1 Appearance(3) 6:2 Marking and factory information (3) 6:3 Functionality(3) 7 Measuring Instrument Control(3) 7:1 Test conditions (3) 7:2 Verification items and verification methods (4) 7:3 Processing of verification results (8) 7:4 Verification cycle (8) Appendix A Format of the Inner Pages of the Verification Certificate and Verification Result Notification (9) A:1 Format of the inner page of the verification certificate (9) A:2 Format of the inner page of the test result notification (12) Appendix B Standing Wave Tube Design Requirements (13)

Introduction

This regulation is prepared according to the rules given in JJF1002-2010 "Rules for Compilation of National Metrology Verification Regulations", and According to the requirements of JJF1059:1-2012 "Assessment and Expression of Measurement Uncertainty", the measurement uncertainty is evaluated and expressed: This regulation uses the standing wave tube absolute calibration method, which is consistent with JJF1340-2012 "20Hz~2000Hz vector It is different from Hydrophone Calibration Specification, which uses the standing wave tube comparison method: This regulation is published for the first time: Verification Regulations for 20Hz~1kHz Vector Hydrophone

1 Scope

This regulation applies to the initial verification and follow-up verification of vector hydrophones used in the frequency range of 20Hz~1kHz and check in use: For the type of vector hydrophone that includes a sound pressure channel, this regulation is only applicable to the verification of its vector channel:

2 References

This procedure references the following documents: JJG 233-2008 piezoelectric accelerometer JJG 449-2014 Octave and Fractional Octave Filters JJF1001 General Metrology Terms and Definitions JJF1034-2020 Acoustic Metrology Terms and Definitions JJF1340-2012 20Hz~2000Hz vector hydrophone calibration specification GB/T 3102:7 Acoustic quantities and units Commonly used frequencies in GB/T 3240-1982 acoustic measurement GB/T 3947 Acoustic Terminology For dated references, only the dated version applies to this regulation; for undated references document, its latest version (including all amendments) applies to this regulation:

3 Terminology and units of measurement

JJF1001, JJF1034, GB/T 3947 and JJF1340-2012 and the following terms and definitions apply in this regulation: This regulation adopts the quantities and units specified in GB/T 3102:7: Ma The ratio of the open circuit voltage at the output of a vector hydrophone to the actual particle acceleration acting on its receiving surface: Unit: V/(m s-2): Ma The base 10 logarithm of the ratio of the magnitude of the particle acceleration sensitivity to the reference value multiplied by 20: Unit: dB: Note: The reference value is 1V/(m·s-2): Mv The ratio of the open circuit voltage at the output of a vector hydrophone to the actual particle velocity acting on its receiving surface: ......

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