Particle measurement device and method based on fiber coupling

A particle detection and optical fiber coupling technology, which is applied in the field of particles in emulsions and suspensions, and can solve the problems of high device complexity, sample cell reflection and scattering, etc.

Inactive Publication Date: 2011-11-23
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art, to provide a liquid particle automatic detection device and detection method based on optical fiber coupling, to solve the high complexity of the device and the determination of the refractive index to be measured in the particle measurement of the total light scattering method. and the reflection and scattering problems of the sample cell

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  • Particle measurement device and method based on fiber coupling
  • Particle measurement device and method based on fiber coupling

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0040] One, basic principle of the present invention:

[0041] For a polydisperse particle system whose particle size distribution function is N(D), there can be many different methods for defining the average particle size. In the light total scattering method, the average extinction coefficient K of the polydisperse particle system is defined according to the principle of equivalent extinction coefficient m and mean diameter D 32 as follows:

[0042] K m = ∫ K ext N D 2 dD ∫ N D 2 ...

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Abstract

The invention discloses a particle size measurement device and method based on fiber coupling. The measurement device is composed of a high-stability multi-wavelength light source, an input fiber, a first high-precision electric control optical adjusting bed, a CCD (charge coupled device) imaging system, a second high-precision electric control optical adjusting bed, an output fiber, a high-precision detector and a computer. The measurement method comprises the following steps: the computer is utilized to control the high-precision electric control optical adjusting bed, and control and lock the end surface of the input fiber which is connected with the light source and the end surface of the output fiber which is connected with a power meter within a distance of 100mu m, a solution to be tested is dropped to form a sample pool structure, then multi-wavelength scanning is utilized and a Lorentz model is combined to modify the traditional MIE theory; and a multivariable genetic algorithm is provided to realize real-time on-line measurement. The device has small volume and is convenient to move, the solution to be tested is not required to be subjected to refractive index measurement in advance, an external and independent high-power laser light source is not required, the reflection and scattering of a sample pool are eliminated and the real-time on-line particle measurement can be performed.

Description

technical field [0001] The invention relates to particles in emulsions and suspensions, in particular to a particle measuring device and detection method based on optical fiber coupling. Background technique [0002] In recent years, particle size detection has been widely used in agriculture, chemical industry, and biomedicine. Including sieving method, sedimentation method, microscope method, electric induction method, ultrasonic method, light scattering method, etc. Among them, the sieving method is detected by colorimetry or by using a specific pore structure to screen particles of related particle size. The total light scattering method is an absolute measurement method that does not require calibration, and is superior to other test methods in terms of measurement principle and measurement device. The particle measurement based on the total light scattering method has been widely used and researched in recent years, and many scholars and experts have proposed more ef...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
Inventor 隋国荣陈抱雪朱嘉宁江建军周霞程利
Owner UNIV OF SHANGHAI FOR SCI & TECH
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