Monochrome laser induced incandescent light nano-grade soot grain diameter measurement device and method

A technology of laser induction and measurement device, which is applied in the direction of measurement device, particle size analysis, particle and sedimentation analysis, etc. It can solve the problems of low accuracy rate, slow cooling speed, and difficult operation of incandescent light, so as to achieve small relative error and avoid time-consuming and laborious Effect
CN107976384AActive Publication Date: 2018-05-01ZHEJIANG UNIV
7 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2018-05-01

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a monochrome laser induced incandescent light nano-grade soot grain diameter measurement device and method and belongs to a grain diameter measurement technology of soot particles. The measurement device comprises a flame generation unit, a laser device for heating the soot particles of flame, a capturing unit for capturing an incandescent light signal in the flame, an oscilloscope for displaying and recording a relationship between the captured incandescent light signal and time, and a processing unit which is in communication connection with the oscilloscope, whereinthe processing unit comprises a storage device and a processor; the storage device is used for storing a computer program; when the computer program is executed by the processor, the following steps can be realized: defining time needed for reducing the strength of the laser induced incandescent light signal of the soot particles to 1 / e of a peak value as signal characteristic time; obtaining thegrain diameter of the soot particles in the flame based on a grain diameter calculation model comprising a relationship between the grain diameter of soot and the signal characteristic time; obtaininga more accurate grain diameter value by utilizing a method for calibrating physical parameters, so as to conveniently and rapidly obtain two-dimensional grain diameter distribution of the soot.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the particle size measurement technology of soot particles, in particular to a monochromatic laser-induced incandescent light nanoscale soot particle size measurement device and method. Background technique

[0002] In recent years, the harm of particles in the atmosphere has been widely concerned by people, and the harm of soot to the human body has a great relationship with the particle size. The smaller the particle size of soot, the greater the proportion of stagnant particles entering the human lungs. The harm to the human body is also greater, so it is more practical to study the particle size measurement of nano-scale soot. The laser-induced incandescent light technology has high time and space resolution, and it is a promising technology for soot testing.

[0003] The current laser-induced incandescent technology is usually a two-color laser-induced technology, and it is necessary to establish a two-color laser-induced...

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