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

PM2.5 concentration monitoring method based on CCD back scattering

A backscattering and concentration monitoring technology, applied in measurement devices, suspension and porous material analysis, particle suspension analysis, etc., can solve problems such as lack of mobility and convenience, and achieve sufficient data, practicability, and simplification. Calculated effect

Inactive Publication Date: 2015-01-28
HANGZHOU DIANZI UNIV
View PDF6 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is based on the basic principle of side scatter, and lacks mobility and convenience in actual operation

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
  • PM2.5 concentration monitoring method based on CCD back scattering
  • PM2.5 concentration monitoring method based on CCD back scattering
  • PM2.5 concentration monitoring method based on CCD back scattering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] see figure 1 , the specific scheme of this kind of PM 2.5 concentration monitoring method based on CCD backscattering is as follows:

[0024] Step 1 Preparations.

[0025] Step 1.1 Select the experimental equipment that meets the experimental requirements. The key instrument parameters of the method are as follows: the laser 16 emits a fundamental mode Gaussian beam, the laser power is 500mw, and the wavelength is 532nm, and the beam waist radius at the laser 16 port is 1mm; It is 10cm. The resolution of the CCD 12 on the focal plane is 768×574, and the pixel size is 12.7 μm×9.8 μm. The sensitivity of CCD is 0.0002lm illuminance and outputs 200mV voltage, and the frame number of CCD12 is 50 frames per second, that is, it can output 50 measurement data per second.

[0026] Step 1.2 Design the experimental device and complete the physical connection.

[0027...

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
Login to View More

Abstract

The invention relates to a PM2.5 concentration monitoring method based on CCD back scattering. The method comprises the steps of imaging emitted laser beams on a CCD through scattering of atmospheric particulate matters according to a mie scattering principle and a CCD laser radar imaging principle, inputting the laser beams into a computer through a data wire, and acquiring corresponding data through picture catching software; performing matlab function fitting to obtain a corresponding model according to an echo scattering diagram acquired by the catching software, and inverting the concentration of PM2.5 from the measured data of the echo scattering diagram by the model. The method can be used for monitoring the PM2.5 concentration in a specific region in real time. By the adoption of a statistical reasoning mode, complicated data calculation is ingeniously avoided; the echo scattering diagram is statistically analyzed according to a telescope imaging principle and the mie scattering principle; furthermore, by the selection of the relation between the image brightness sum within a certain range and the PM2.5 mass concentration, the calculation is simplified.

Description

technical field [0001] The invention belongs to the field of photoelectric technology and relates to a PM 2.5 concentration monitoring device based on CCD backscattering. Background technique [0002] In the past two decades, the rapid development of my country's energy, industry, transportation and other industries has brought about environmental pollution that cannot be ignored. Among them, the problem of atmospheric particulate matter pollution is particularly prominent. Particles of different particle sizes are deposited in different parts of the respiratory tract along with human breathing. Among them, particles with a particle size of 10-100 μm are blocked outside the nasal cavity, most of the 2.5-10 μm particles are intercepted in the nasopharynx, 0.01-2.5 μm particles are deposited in the bronchi and lungs, and 0.1 μm particles are mainly deposited in the lungs. The greatest harm to the human body. Particles with a particle size of less than 2.5 μm are called PM 2...

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 Applications(China)
IPC IPC(8): G01N15/06
Inventor 胡淼吴端法谢家亮邓晶李齐良周雪芳魏一振卢旸钱正丰
Owner HANGZHOU DIANZI UNIV
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