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JJG 2017-2005 English PDF

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JJG 2017-2005: Verification scheme of measuring instruments for underwater sound pressure
Status: Valid

JJG 2017: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 2017-2005English259 Add to Cart 3 days [Need to translate] Verification scheme of measuring instruments for underwater sound pressure Valid JJG 2017-2005
JJG 2017-1987English199 Add to Cart 2 days [Need to translate] Verification Scheme of Measuring Instruments for Underwater Sound Pressure Obsolete JJG 2017-1987

PDF similar to JJG 2017-2005


Standard similar to JJG 2017-2005

GB/T 3222.2   GB/T 3222.1   JJG 188   JJF 2012   JJG 1190   JJF 2017   

Basic data

Standard ID JJG 2017-2005 (JJG2017-2005)
Description (Translated English) Verification scheme of measuring instruments for underwater sound pressure
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Classification of International Standard 17.140.99
Word Count Estimation 10,156
Date of Issue 2005-04-28
Date of Implementation 2005-10-28
Older Standard (superseded by this standard) JJG 2017-1987
Summary This standard applies to 1Hz ~ 5MHz band sound pressure meter water value transfer. It provides the basis of measurement of the water by the water sound pressure sound pressure measurement standards to working measuring instruments value transfer between the program and the value transfer value transfer method when the best measurement capability. In carrying out the calibration, can be used as a basis for traceability.

JJG 2017-2005: Verification scheme of measuring instruments for underwater sound pressure

---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.
Verification scheme of measuring instruments for underwater sound pressure National Measurement and Verification System of the People's Republic of China Underwater sound pressure measuring instrument Released on.2005-04-28 2005-10-28 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG 2017-1987 The verification system was approved by the General Administration of Quality Supervision, Inspection and Quarantine on April 28,.2005. It will be implemented as of October 28,.2005. Focal Point. National Acoustic Metrology Technical Committee Main drafting unit. China Testing Technology Research Institute Participated in drafting unit. Institute of Acoustics, Chinese Academy of Sciences National Waterproof Sound Metering Level Station This verification system table is interpreted by the National Acoustic Metrology Technical Committee. The main drafters of this verification system table. Shang Guohua (China Testing Technology Research Institute) Sun Lei (China Testing Technology Research Institute) Participate in the drafters. Zhu Houqing (Institute of Acoustics, Chinese Academy of Sciences) Yuan Wenjun (Defense Water Sound Measurement Level 1 Station)

table of Contents

1 Scope (1) 2 Underwater sound pressure measurement reference equipment (1) 2.1 Low-frequency underwater sound pressure reference device (1) 2.2 Free-field reciprocal method underwater acoustic pressure reference device (intermediate frequency) (1) 2.3 High-frequency underwater sound pressure reference device (2) 2.4 The main way of water sound pressure transmission from the basic amount of the amount of transmission (2) 3 underwater sound pressure measurement standard device (2) 3.1 Low-frequency underwater sound pressure measurement standard device (2) 3.2 Medium frequency water sound pressure measurement standard device (2) 3.3 High-frequency underwater sound pressure measurement standard device (3) 3.4 The best measurement capability of hydroacoustic sound pressure standard and quantity transfer (3) 4 Underwater sound pressure working measuring instruments (4) 4.1 Measuring hydrophones (precision) (4) 4.2 Measuring hydrophones, transmitting transducers and underwater acoustic pressure measuring equipment (4) 5 Water sound pressure measurement instrument verification system table block diagram (5) Hydroacoustic sound pressure measuring instrument verification system table

1 Scope

This verification system table is applicable to the transmission of the magnitude of the underwater acoustic pressure measuring instrument in the frequency range of 1 Hz to 5 MHz. It The water pressure sound pressure measurement standard is determined by the water sound pressure measurement standard to the work measuring instrument between the value transfer procedures, the value The best measurement capability when passing methods and values. It can be used as a basis for traceability when performing calibration.

2 Underwater sound pressure measurement reference instrument

The underwater sound pressure reference is used to reproduce and preserve the water sound pressure unit quantity in the frequency range of 1 Hz to 5 MHz, and pass The water sound pressure measurement standard instrument transmits the quantity to the hydroacoustic sound pressure working measuring instrument to ensure the domestic water sound pressure and pressure The accuracy and uniformity of the values. The unit of sound pressure is Pascal (Pa), and the sound pressure level is expressed in decibels (dB) (reference value is 1 μPa). The sensitivity of the hydrophone (in V/μPa) parameter is used in this verification system table to reproduce the sound pressure value. And pass. The hydroacoustic sound pressure measurement standard includes GJJ (acoustic) 0201 "Low frequency underwater acoustic pressure reference device", GJJ (acoustic) 0202 "Free-field reciprocity method underwater acoustic pressure reference device" and GJJ (acoustic) 0203 "high-frequency underwater acoustic pressure reference device". 2.1 Low frequency underwater sound pressure reference device The low-frequency underwater acoustic pressure reference device is a sealed measuring chamber with a piezoelectric compensation transducer, a constant measuring device, and a low The frequency reference consists of a standard hydrophone and ancillary equipment. The standard of the low frequency reference device is a standard hydrophone for reference. through The double-radiation zero-value method is used to measure the sound pressure sensitivity of a standard hydrophone with a low-frequency reference, and the sound pressure value is reproduced. frequency The range is from 1 Hz to 2 kHz, and the uncertainty is U = 0.5 dB (k = 2). The sound pressure value is transmitted by the double radiation zero value method, and the measurement standard is directly calibrated on the low frequency underwater acoustic pressure pressure reference device. The sound pressure sensitivity of the low frequency standard hydrophone of the appliance. The frequency range is from 1 Hz to 2 kHz, the best measurement of the magnitude transfer The capability is 0.5dB (k=2). 2.2 Free-field reciprocal method underwater acoustic pressure reference device (intermediate frequency) Free-field reciprocal method underwater acoustic pressure reference device, intermediate frequency silencer pool satisfying free field conditions and its coordinate measurement The device and the intermediate frequency reference are composed of standard hydrophones and supporting equipment. The standard device of the reference device is the reference standard water listening Device. Measuring the IF level with the open field free field sensitivity of the standard hydrophone by the free field reciprocity method Recurrence. The frequency range is from 2 kHz to.200 kHz (generally referred to as the intermediate frequency hydroacoustic sound pressure reference device) when the frequency is When the frequency is 2 kHz~100 kHz, the uncertainty is U=0.7dB (k=2); when the frequency is 100kHz~200kHz, The uncertainty is U = 0.9 dB (k = 2). The transmission of sound pressure is based on the free field reciprocity method, which is composed of the intermediate frequency standard hydrophone and the intermediate frequency base in the standard instrument. A group of standard hydrophones is used to perform a reciprocal calibration on the free-field reciprocal hydroacoustic sound pressure reference device. Open-field free-field sensitivity of the IF standard hydrophone, and calibration with a standard hydrophone based on the IF reference participating in the calibration As a result, the calibration result of the intermediate frequency standard hydrophone is confirmed. Frequency range from 2kHz to.200kHz, when frequency For 2kHz~100kHz, the best measurement capability for magnitude transfer is 0.7dB (k=2); the frequency is 100kHz~ At.200 kHz, the optimal measurement capability for magnitude transfer is 0.9 dB (k=2).

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