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On-line measurement system and method for shape parameters of wet particles based on light scattering

A measurement system and particle shape technology, applied in the field of optical measurement, can solve problems such as large measurement errors, achieve the effects of high speed, avoid detection deviation problems, and high measurement accuracy

Active Publication Date: 2012-12-12
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

If the spherical particle model is used for approximation, the measurement error is large

Method used

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  • On-line measurement system and method for shape parameters of wet particles based on light scattering
  • On-line measurement system and method for shape parameters of wet particles based on light scattering
  • On-line measurement system and method for shape parameters of wet particles based on light scattering

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited to the embodiments.

[0041] An on-line measurement system for wet particle shape parameters in this embodiment includes a continuous laser 1, a parabolic mirror 4, a measurement pipeline 6, an ICCD detector 13, an oblique condenser lens 7, a photoelectric detection and signal generation including a PIN tube circuit 8 and computer 14.

[0042] Such as figure 1As shown, the central part of the measuring pipe 6 is located at the focal point of the mirror cavity of the parabolic mirror 4, where the particle is measured. After shaping and power adjustment, the laser light emitted by the laser 1 is reflected by the plane mirror 5 and the parabolic mirror 4 and converges at the focal position of the mirror cavity of the parabolic mirror 4 . When particles in the fluid to be measured enter the measurement area,...

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Abstract

The invention discloses an on-line measurement system for shape parameters of wet particles based on light scattering. The on-line measurement system is used for measuring shape parameters of wet particles in a fluid flowing through a measuring pipeline in real time and comprises the following components: a laser which generates continuous laser light used for irradiating the wet particles; a paraboloidal reflector which has a paraboloidal reflection plane, wherein the focus of the reflector is located at a central axis of the measuring pipeline and the continuous laser light gathers at the focus after reflection by the reflection plane, which enables the wet particles located at the focus to emit diffusion light; and an ICCD detector, wherein the diffusion light is parallelly incident on the ICCD detector after reflection by the paraboloidal reflector, the ICCD detector acquires a scattering pattern of the wet particles and inputs the scattering pattern to a computer for processing so as to obtain a three dimensional scattering function, and the shape parameters of the wet particles can be obtained through inversion algorithm based on template library matching. The invention also discloses an on-line measurement method for the shape parameters of the wet particles. According to the invention, deficiencies of conventional light scattering granularity measuring methods are made up, high measuring precision is obtained, and on-line measurement can be realized.

Description

technical field [0001] The invention belongs to the field of optical measurement, and in particular relates to an online measurement device for the shape parameter of wet particles and a measurement method using the device. Background technique [0002] Particle shape parameters (including particle size) are the most important parameters in particle geometric characteristics, and are widely used in marine microbial detection, environmental monitoring, medicine, chemical industry and many other fields. [0003] The traditional methods of measuring particle shape parameters include direct observation method, sedimentation method, sieving method and so on. With the development of laser technology, photoelectric detection technology and computer technology, the particle size measurement method based on the principle of light scattering has been greatly developed. The measurement of particle size by laser scattering method has the advantages of wide range of measurable particle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/10
Inventor 杨克成丁驰竹李微夏珉
Owner HUAZHONG UNIV OF SCI & TECH
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