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A method and system for measuring particle size distribution based on light scattering field

A particle size distribution and measurement method technology, applied in particle and sedimentation analysis, measuring device, particle size analysis and other directions, can solve the problems of complex measurement system structure and high measurement cost, and achieve the effect of simple structure and low cost

Active Publication Date: 2020-11-24
HUAZHONG UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

[0006] The present invention provides a particle size distribution measurement method and system based on the light scattering field, which is used to solve the problems caused by the complicated structure of the measurement system used in the existing particle size distribution measurement method to collect high-dimensional scattered light signals with high angular resolution. Technical problems with high measurement costs

Method used

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  • A method and system for measuring particle size distribution based on light scattering field
  • A method and system for measuring particle size distribution based on light scattering field
  • A method and system for measuring particle size distribution based on light scattering field

Examples

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Effect test

Embodiment 1

[0053] A method 100 for measuring particle size distribution based on light scattering field, such as figure 1 shown, including:

[0054] Step 110, directing the incident light to the area to be tested in the environment to be tested;

[0055] Step 120: Use a curved mirror to collect scattered light signals of all particles in the area to be measured within the range of observation angles on one side of the incident light direction; use an optical lens to shape the scattered light signals, and then use photoelectric The converter collects independent scattered light signals corresponding to each angle within the observation angle range;

[0056] Step 130, based on the scattered light signals at various angles, the particle size distribution of the particles is calculated through reverse deduction.

[0057] It should be noted that the particles of different particle sizes in the environment to be tested are evenly distributed, therefore, the particle size distribution of the ...

Embodiment 2

[0091] A particle size distribution measurement system 200 based on a light scattering field, comprising: a curved mirror, an optical lens, a photoelectric converter, and a processor. Among them, the curved reflector is used to collect the scattered light signals of all particles in the area to be measured on the side of the incident light direction; the optical lens is used to shape the scattered light signals, and the photoelectric converter is used to Collect independent scattered light signals corresponding to each angle within the range of observation angles; the processor is used to calculate the particle size distribution based on the scattered light signals at each angle through reverse deduction.

[0092] Since in the particle size distribution measurement of particle matter, the final particle size distribution measurement results need to be obtained from the collected optical signals, the acquisition of higher-dimensional scattered light signals is the key to the opt...

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Abstract

The invention discloses a particle size distribution measurement method and system based on a light scattering field. The method comprises the following steps: emitting incident light to a to-be-measured area in a to-be-measured environment; collecting scattered light signals of all particles in the area within an observation angle range on one side of the incident light incident direction by adopting a curved reflector; shaping the scattered light signals by adopting an optical lens, and then collecting an independent scattered light signal corresponding to each angle in an observation anglerange by adopting a photoelectric converter; and based on the scattered light signals at all angles, obtaining particle size distribution of the particles through reverse deduction calculation. According to the invention, only the curved reflector, the optical lens and the photoelectric converter are adopted; the system is simple in structure and low in cost, can achieve independent collection ofscattered light signals at all angles in the observation angle range, obtains a large-range high-angular-resolution scattering angle spectrum, provides scattered light signals with multiple channels for accurately solving the particle size distribution, achieves the function of accurate particle size distribution measurement of particles, and is simple in structure, low in cost and high in practicability.

Description

technical field [0001] The invention belongs to the field of particle measurement and sensing, and more particularly relates to a particle size distribution measurement method and system based on a light scattering field. Background technique [0002] Particulate matter plays an important role in human production and living activities, and is closely related to human production and life. In some industrial production, we often need to know the particle size information of the product in order to evaluate the quality and performance of the product. In specific applications such as fire detection, more accurate fire alarms can be achieved after obtaining particle size information. The particulate matter suspended in the air will directly affect people's health. Therefore, obtaining the particle size information of particulate matter in the air is of great significance for evaluating the air quality and more comprehensively characterizing the harm of particulate matter to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02
CPCG01N15/0211
Inventor 王殊邓田陈昂
Owner HUAZHONG UNIV OF SCI & TECH
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