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

Method and device for measuring particle concentration

A particle concentration and measurement method technology, which is applied in the field of particle concentration measurement methods and devices based on the light scattering principle, can solve the problems of inability to calibrate and measure the K value, increase the complexity of the system, etc., and achieve accurate and reliable detection results. Simple, cost-reducing effect

Active Publication Date: 2020-01-31
FOCUSED PHOTONICS +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The K value cannot be calibrated in real time. Generally, the K value will be calibrated after a period of time (such as 2 hours) after the particle measurement;
[0004] 2. The combination technology introduces the β-ray method or the oscillation balance method or the filter membrane weighing method, which increases the cost, increases the complexity of the system, and increases the overall volume of the device, making it impossible to carry out portable particle measurement

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
  • Method and device for measuring particle concentration
  • Method and device for measuring particle concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] figure 1 The structure diagram of the particulate matter concentration measurement device of this embodiment is schematically given, such as figure 1 As shown, the particulate matter concentration measurement device includes a light source 1, a collimator lens 2, a light sensing area 3, and an optical trap 4. The measurement device further includes:

[0032] The side scattering unit 5, the side scattering unit includes: a collimating lens group 51, a polarization beam splitter 52, a first detector 53 and a second detector 54; the polarization beam splitter will collimate the side Splitting the scattered light to form horizontally polarized light and vertically polarized light, the horizontally polarized light and the vertically polarized light respectively enter the first detector and the second detector for detection;

[0033] The backscattering unit 6 includes a focusing lens 61 and a third detector 62, and the focused side scattered light enters the third detector for dete...

Embodiment 2

[0046] This embodiment is an application example of the method and device for measuring the concentration of particulate matter according to Embodiment 1 of the present invention in the field of atmospheric monitoring.

[0047] In this application example, the light source is a laser diode, the first detector, the second detector, and the third detector are all PIN photodiodes, and the first detector outputs a vertically polarized light signal I of side scattered light. 1 , The second detector outputs the horizontally polarized light signal I of the side scattered light 2 , So as to obtain the depolarization ratio D=I 1 / I 2 ; Side scatter signal I Sideways = I 1 +I 2 ; The third sensor outputs the backscatter signal I Backward . At the same time, the ambient temperature T and the relative humidity H are obtained through the temperature and humidity meter, and the depolarization ratio D and the side scatter signal I Sideways , Backscatter signal I Backward , The ambient tempe...

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

No PUM Login to View More

Abstract

The invention relates to a method and device for measuring the concentration of particulate matter. The method for measuring the concentration of particulate matter includes the following steps: (A1) establishing a neural network model; (A2) measuring and obtaining the depolarization ratio and side scattering signal of the particulate matter to be measured. The backscattered signal, ambient temperature and relative humidity are input into the neural network model; the depolarization ratio is the depolarization ratio of the side scattered light; (A3) the neural network model outputs the corrected particle concentration. The invention has the advantages of real-time correction of particle concentration and accurate measurement results.

Description

Technical field [0001] The present invention relates to the field of particulate matter concentration monitoring, in particular to a method and device for measuring particulate matter concentration based on the principle of light scattering. Background technique [0002] At present, the measurement methods of particle concentration mainly include: standard weighing method, oscillatory balance method, β-ray method and light scattering method. The light scattering method is widely used in the field of online particle monitoring due to its advantages of good repeatability and high sensitivity. However, the light scattering method is based on the principle of light scattering for measurement, which has poor adaptability to the environment. The scattering signal is easily affected by the particle size, shape, refractive index, and environmental temperature and humidity. The K value of the density conversion coefficient is calibrated regularly. Usually, light scattering method and β-r...

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): G01N15/06G06N3/08
CPCG06N3/08G01N15/06G01N15/075
Inventor 胡扬俊华道柱黄伟叶华俊
Owner FOCUSED PHOTONICS
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