Backward elastic scattering spectral measurement analysis system and method for online detection of size distribution of small particles in suspension

A technology of tiny particles and elastic scattering, used in particle and sedimentation analysis, particle size analysis, measuring devices, etc., can solve the problems of large deviation in the extracted particle size, long database calculation and analysis time, and difficulty in real-time analysis and measurement. Accurate definition of scattering angle, simple structure, and the effect of improving accuracy

Inactive Publication Date: 2016-12-07
NANKAI UNIV
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Problems solved by technology

These methods all need to establish a database with the average particle size and distribution variance as variables. Due to the large database, the calculation and analysis time is too long, so it is difficult to achieve the purpose of real-time analysis and measurement.
In addition, some of these analysis methods have similar spectral shapes and spectral distributions, and there will be large deviations when extracting particle sizes.

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  • Backward elastic scattering spectral measurement analysis system and method for online detection of size distribution of small particles in suspension
  • Backward elastic scattering spectral measurement analysis system and method for online detection of size distribution of small particles in suspension
  • Backward elastic scattering spectral measurement analysis system and method for online detection of size distribution of small particles in suspension

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Embodiment Construction

[0029] as attached figure 1As shown, it is the back elastic scattering spectrum measurement and analysis system according to the present invention, including a continuous spectrum light source laser 1, a linear fiber probe 2, a three-dimensional translation stage 3, an angle deflector 4, an off-axis parabolic mirror 5, a two-dimensional translation Stage 6, angle deflector 7, spectrometer 9, computer 10. The first detection end of the line fiber probe 2 is the outgoing fiber, and the other is the collection fiber. The other end is divided into two parts, one fiber is connected to the light source, and the other fiber is connected to the spectrometer 9 . The spectrometer 9 is connected with the computer 10 to realize data operation. The No. 1 fiber in the line fiber probe 2 is located at the focal position of the off-axis parabolic mirror 5, and the fiber arrangement direction is perpendicular to its optical axis, so that the incident light reaching the sample particles 8 is ...

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Abstract

The invention discloses a backward elastic scattering spectral measurement analysis system and method for online detection of size distribution of small particles in a suspension. A linear array fiber probe and an off-axis parabolic reflector are used to construct a multi-angle spectral measurement system, and a spectral analysis method based on wavelet multi-scale analysis is utilized to provide quick and accurate acquisition for the size distribution of particles. The method may be used for real-time monitoring of the production of standard particle, detection of oil-in-water pollutants, granularity detection for milk products, study on particle structure in biological cells and the like. The system is simple, and analytical results are accurate.

Description

technical field [0001] The spectrum measurement and analysis method proposed by the invention belongs to the field of elastic scattering spectrum research and practical application of tiny particles. The existing spectrum acquisition methods are different, but the spectrum analysis method is basically the same, that is, the particle size and refractive index information can be obtained by comparing the measured spectrum with the theoretically calculated Mie scattering spectrum. Similar related technologies can be used for the quality inspection of standard particles, the study of particle structure in biological cells, and the detection of particle pollutants in aqueous solutions. Background technique [0002] The photoelastic scattering spectrum of tiny spherical medium particles has an analytical solution form, namely the Mie scattering formula, which can obtain accurate numerical results by common calculation programs. Therefore, comparing the measurement results with the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
CPCG01N15/0211
Inventor 张德明方晖
Owner NANKAI UNIV
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