Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Dual-wavelength optical real-time aerosol particle size detection device

A particle size and aerosol technology, applied in the field of environmental detection, can solve the problems of different received light intensity amplitude, fuzzy particle size, multi-aerosol particle enrichment time, low relative real-time performance, etc., so as to improve the detection accuracy. Effect

Active Publication Date: 2017-09-12
上海镭慎光电科技有限公司 +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] 2) The refractive index of the particles is different, the amplitude of the received light intensity of the particles in the same particle size or similar particle size range is different, the fluctuation is different, the particle size is more blurred, and it is easy to cause particle size measurement errors
This technology requires multiple aerosol particle enrichment time, relatively low real-time performance, and is not suitable for real-time detection of single aerosol particle size based on the principle of elastic scattered light

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dual-wavelength optical real-time aerosol particle size detection device
  • Dual-wavelength optical real-time aerosol particle size detection device
  • Dual-wavelength optical real-time aerosol particle size detection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0092] The specific implementation method of the present invention is divided into two parts: the theoretical calculation of the scattered light field and the detection device.

[0093] I theoretical simulation

[0094] According to the actual semiconductor device index parameters, the wavelengths of the two selected light sources are λ 1 = 405nm and λ 2 = 980nm. According to Mie scattering theory and Van de Hulst judgment factor P, aerosol particles with different refractive index materials and particle sizes are selected. In practice, particle materials include substances whose refractive index varies with wavelength. For light scattering measurement, specific calculations can be made based on the particle type information in the environment. In the present invention, liquid water and hypothetical substances with fixed refractive indices of 1.5, 1.7, 2 and 2.5 are selected for calculation, discussion and analysis.

[0095] Table 1 Refractive index of water for different ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
particle diameteraaaaaaaaaa
refractive indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a dual-wavelength optical real-time aerosol particle size measurement device, which includes a single-particle focusing gas circuit, two light intensity detection units, two light field distribution detection units, a scattering cavity, a microcomputer control unit and a power supply system. The invention reduces the influence of conditions such as particle refractive index and environmental humidity on the optical equivalent particle diameter of the light scattering method to detect particles, and can improve the sensitivity and accuracy of particle diameter detection; the particle refractive index is calculated by using a side forward scattering light field distribution detection unit , to enhance the accuracy of particle size detection; it can be combined with other aerosol particle detection technologies to improve detection accuracy.

Description

technical field [0001] This patent relates to real-time detection of single aerosol particle size, especially a dual-wavelength single-aerosol particle size measurement device based on light scattering method with strong real-time performance, which can achieve high accuracy of aerosol particle size concentration ground detection. The invention can be applied to the fields of environment detection and the like. Background technique [0002] Aerosol refers to a mixed system formed by solid or liquid particles dispersed and suspended in a gaseous medium. The particle size ranges from 0.001 to 100 μm, and usually the dynamic diameter of the particles is between 0.01 and 10 μm, which can reside in the atmosphere for several hours. It is customary to refer to solid and liquid particles suspended in the atmosphere as aerosols. [0003] Particle size is an important parameter used to describe aerosol particles because it largely determines the behavior of particles suspended in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02
Inventor 赵永凯陈正岩卜一川张佩黄惠杰
Owner 上海镭慎光电科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com