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JJF 1861-2020 English PDF

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JJF 1861-2020: Calibration Specification for Underwater Sound Transducers in 1 kHz to 200 kHz
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1861-2020	English	599	Add to Cart	5 days [Need to translate]	Calibration Specification for Underwater Sound Transducers in 1 kHz to 200 kHz	Valid	JJF 1861-2020

PDF similar to JJF 1861-2020

Standard similar to JJF 1861-2020

GB/T 3222.2 GB/T 3222.1 JJG 188 JJF 1862 JJF 1863 JJF 1853

Basic data

Standard ID	JJF 1861-2020 (JJF1861-2020)
Description (Translated English)	Calibration Specification for Underwater Sound Transducers in 1 kHz to 200 kHz
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A59
Word Count Estimation	26,215
Date of Issue	2020-09-11
Date of Implementation	2021-03-11
Regulation (derived from)	Announcement No. 40 (2020) of the State Administration for Market Regulation
Issuing agency(ies)	State Administration for Market Regulation

JJF 1861-2020: Calibration Specification for Underwater Sound Transducers in 1 kHz to 200 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.
Calibration Specification for Underwater Sound Transducers in 1 kHz to.200 kHz National Metrology Technical Specifications of the People's Republic of China 1kHz~200kHz underwater acoustic transducer calibration specification 2020-09-11 released 2021-03-11 implementation Issued by the State Administration for Market Regulation 1kHz~200kHz underwater acoustic transducer Calibration specification Focal point. National Technical Committee of Acoustics Measurement Main drafting unit. 715 Research Institute of China Shipbuilding Industry Corporation Participated in the drafting unit. Institute of Acoustics, Chinese Academy of Sciences 726 Research Institute of China Shipbuilding Industry Corporation This specification entrusts the National Acoustics Metrology Technical Committee to be responsible for interpretation The main drafters of this specification. Yi Wensheng (The 715th Research Institute of China Shipbuilding Industry Corporation) Zhao Songyang (The 715th Research Institute of China Shipbuilding Industry Corporation) Zhao Han (The 715th Research Institute of China Shipbuilding Industry Corporation) Participating drafters. Mo Xiping (Institute of Acoustics, Chinese Academy of Sciences) Wang Yan (The 726 Research Institute of China Shipbuilding Industry Corporation)

Introduction (Ⅱ) 1 scope (1) 2 References (1) 3 Terms and measurement units (1) 3.1 Equivalent electrical impedance mode (1) 3.2 Equivalent electrical admittance mode (1) 3.3 Free field sensitivity (1) 3.4 Free-field sensitivity level (2) 3.5 Send voltage response (2) 3.6 Sending voltage response level (2) 3.7 Send current response (2) 3.8 Send current response level (2) 3.9 Sound source level(2) 3.10 Directivity pattern (2) 4 Overview (2) 5 Metering characteristics (3) 5.1 Equivalent electrical impedance mode, equivalent electrical admittance mode (3) 5.2 Free-field sensitivity level (3) 5.3 Sending voltage response level (3) 5.4 Send current response level (3) 5.5 Sound source level(3) 5.6 Directivity (3) 6 Calibration conditions (3) 6.1 Environmental conditions (3) 6.2 Measurement standards and other equipment (3) 7 Calibration items and calibration methods (4) 7.1 Calibration items (4) 7.2 Calibration method (4) 8 Calibration result expression (9) 8.1 Calibration data processing (9) 8.2 Calibration certificate (9) 8.3 Measurement uncertainty of calibration results (10) 9 Recheck interval (10) Appendix A Contents of Calibration Certificate (11) Appendix B Pulse Sound Calibration Technology (14) Appendix C Evaluation Example of Measurement Uncertainty (16)

Introduction

JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications", JJF 1001-2011 "General Metrology Terms and Definition" and JJF 1059.1-2012 "Evaluation and Expression of Measurement Uncertainty" together constitute the support for the formulation of this specification The basic series of specifications. This code was formulated with reference to GB/T 7965-2002 "Acoustic Underwater Acoustic Transducer Measurement Quantities" and GB/T 7967-2002 "High-power characteristics and measurement of acoustic hydroacoustic transmitters". This specification is released for the first time. 1kHz~200kHz underwater acoustic transducer calibration specification

1 Scope

This specification applies to the calibration of underwater acoustic transducers in the frequency range of 1kHz to.200kHz.

2 Reference documents

This specification refers to the following documents. JJG449-2014 Octave and Fractional Octave Filter JJF 1001 General measurement terms and definitions JJF 1034 Acoustic measurement terms and definitions JJF 1059.1-2012 Measurement Uncertainty Evaluation and Expression GB/T 3102.7 Acoustic quantities and units GB/T 3947-1996 Acoustic terms GB/T 7965-2002 Acoustic and underwater acoustic transducer measurement GB/T 7967-2002 High-power characteristics and measurement of acoustic hydroacoustic transmitter For dated reference documents, only the dated version applies to this specification; for undated reference documents, The latest version (including all amendments) is applicable to this specification.

3 Terms and units of measurement

The following terms and definitions defined by JJF 1001, JJF 1034 and GB/T 3947-1996 apply to this code. This specification adopts the quantities and units specified in GB/T 3102.7. 3.1 Equivalent electrical impedance mode At a certain frequency, the complex ratio of the instantaneous voltage at the electrical terminal of the underwater acoustic transducer to the instantaneous current caused is the equivalent electrical impedance, Its amplitude is the equivalent electrical impedance modulus, the symbol is |Z|. Note. The unit is ohm (Ω). 3.2 Equivalent conductivity nanomode The reciprocal of the equivalent electrical impedance of the underwater acoustic transducer is the equivalent electrical admittance, and its amplitude is the equivalent electrical admittance mode, with the symbol |Y|. Note. The unit is Siemens (S). 3.3 Free field sensitivity The open-circuit voltage at the output of the receiving transducer is the same as the reference sound center of the transducer before the transducer is introduced into the sound field The ratio of the free-field sound pressure at, the symbol is M. Note. The unit is Volts per Pa (V/Pa). [JJF 1034-2005, definition 3.64]

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