GB/T 29023.1-2012Measurement and characterization of particles by acoustic methods -- Part 1: Concepts and procedures in ultrasonic attenuation spectroscopy (English PDF)
超声法颗粒测量与表征 第1部分： 超声衰减谱法的概念和过程
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Issued by
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Level / Type
National · Recommended
Issue date
December 31, 2012
Implementation date
October 1, 2013
Scope
GB/T 29023.1-2012 is the English-translated version of 超声法颗粒测量与表征 第1部分： 超声衰减谱法的概念和过程.
GB/T 29023.1-2012 is the Chinese standard "Measurement and characterization of particles by acoustic methods -- Part 1: Concepts and procedures in ultrasonic attenuation spectroscopy".
Its scope clause reads: This section GB/T 29023 specifies the ultrasonic measurements of liquid dispersed in one or more of the particle size distribution of the material over the concept and Drive range includes colloids, dispersions, slurries and emulsions, the size of a typical particle size analysis interval 10nm ~ 3mm, but outside this range Around the particles can be measured.
Volume concentration of the dispersed phase can be measured range from 0.1% to 50% or even higher, depending on the continuum and points Bulk density contrast quality.
This section applies to dynamic change monitoring particle size distribution, including high concentrations of coagulation and flocculation system. Its clauses include terms and definitions.
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Document preview — GB/T 29023.1-2012
National Standard of the People's Republic of China
- ICS
- 19.120
- Classification
- A 28
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Contents
- Preface
- Introduction
- 1 Scope
- 2 Terms and definitions
- 3 Sampling and reference
- 3.1 Sampling Considerations
- 3.2 reference
- 4. Method
- 4.1 Principle
- 4.2 Instrument
- 4.3 Preparing
- 4.4 Measuring
- 5 Results Report
- 5.1 Laboratory Test Report
- 5.2 Online measurement and control applications result
- Appendix A (informative) Technology
- Annex B (informative) Application Examples
- Annex C (informative) decay curve inversion
- References
1 Scope
This section GB/T 29023 specifies the ultrasonic measurements of liquid dispersed in one or more of the particle size distribution of the material over the concept and
Drive range includes colloids, dispersions, slurries and emulsions, the size of a typical particle size analysis interval 10nm ~ 3mm, but outside this range
Around the particles can be measured. Volume concentration of the dispersed phase can be measured range from 0.1% to 50% or even higher, depending on the continuum and points
Bulk density contrast quality.
This section applies to dynamic change monitoring particle size distribution, including high concentrations of coagulation and flocculation system.
2 Terms and definitions
The following terms and definitions apply to this document.
2.1 Absorption
Ultrasonic wave through the media, the removal of acoustic scattering other than the energy loss.
2.2 Attenuation
Muffler extinction
Ultrasonic wave through the media, the total acoustic energy losses, including scattering and absorption.
Note. The unit of measurement is recommended. decibels (dB). It is defined as the common logarithm of the ratio of 10 times the intensity of the incident and the transmitted ultrasonic wave or ultrasonic wave intensity 20 times
Common logarithm of the amplitude ratio of the incident ultrasonic wave and amplitude of the ultrasonic transmission. It can also be selected based on the natural logarithm of the neper (Np) as the unit of measurement, 1Np =
8.686dB.
2.3 Attenuation coefficient
Muffler coefficient extinctioncoefficient
Ultrasonic acoustic unit length by the media after the energy attenuation, expressed in dB/cm or Np/cm.
Note. The attenuation coefficient of frequency or frequency squared sometimes expressed in the form in order to distinguish the main attenuation mechanism. For clarity, only considers the standard unit length
Attenuation (dB/cm).
2.4 Attenuation spectrum
The measured attenuation coefficient as a function of frequency (in abscissa indicates frequency and the ordinate represents the attenuation coefficient of a curve drawn).
2.5 Bandwidth
Frequency range ultrasonic signals contained Typically, the attenuation 3dB frequency difference between the points on the spectrum analyzer.
2.6 Broadband
Wide band ultrasonic signals, characterized in that not less than one-half the bandwidth of the center frequency.
GB/T 19077 | GB/T 39990 | GB/T 39193 | GB/T 29025.1 | GB/T 29024.3 | GB/T 29024.2 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 40 pages — is available in the English PDF.
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