Fitting reconstruction method of gas temperature probability density distribution based on single optical path multi-spectrum

A technology of probability density distribution and single optical path, which is applied to thermometers, thermometers, instruments, etc. that change physically/chemically, to achieve the effect of improving reconstruction speed and simplifying the system

Active Publication Date: 2020-04-24
BEIHANG UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem with this is that it requires prior information
However, this method of realizing temperature field reconstruction requires multiple optical windows to obtain multiple sets of multiple projection measurement data, which is a limitation for some system equipment that does not recommend or allow opening of optical windows

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
  • Fitting reconstruction method of gas temperature probability density distribution based on single optical path multi-spectrum
  • Fitting reconstruction method of gas temperature probability density distribution based on single optical path multi-spectrum
  • Fitting reconstruction method of gas temperature probability density distribution based on single optical path multi-spectrum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] In this embodiment, a gas whose temperature probability density distribution is unimodal and bimodal is respectively given, and the effectiveness of the method is proved by numerical simulation of single optical path multi-spectrum.

[0031] Below in conjunction with accompanying drawing, the present invention will be further described:

[0032] Step 1, for the gas CO to be measured, the range of the laser output spectrum of the laser is 2100-2140cm -1 ,Such as figure 2 As shown, 32 spectral lines are selected for verification and simulation;

[0033] Step 2, the laser light emitted by the laser is divided into two beams of equal light intensity by the optical fiber beam splitter, one beam passes through the area to be tested, the other beam passes through the etalon, and then is received by the detector to obtain one absorption signal and one reference signal, such as figure 1 shown.

[0034] Step 3: Obtain 32 absorption peaks within the scanning range of the lase...

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 provides a gas temperature probability density distribution fitting reconstruction method based on single light path and multispectrum, comprising the following steps of: making a lightpath pass through the gas to be measured along a single optical path by multiple absorption spectrum information corresponding to the gas molecules to obtain a absorption rate integral measurement data; constructing an integral equation system according to the line strength and the corresponding absorption rate integral measurement data and performing normalization processing; performing a two-dimensional surface fitting of temperature and line center frequency on the line strength, and performing a polynomial fitting respectively on the measurement data and the probability density distribution to be solved to decompose the integral equation system into a matrix equation; solving the matrix equation to obtain fitting parameters, and then solving the gas temperature probability density distribution. Compared to a multi-view multispectral imaging system, the present invention has the advantage that no multiple optical windows are needed, the gas temperature probability density distribution can be reconstructed using only multiple absorption spectra, and the method has fast reconstruction speed, excellent effect, simple structure, good reliability, and widely used application prospect.

Description

technical field [0001] The invention relates to a gas temperature probability density distribution fitting reconstruction method based on single optical path and multi-spectrum, in particular to a high-precision single-optical path multi-spectral gas temperature probability density distribution reconstruction method when the measured temperature parameters are non-uniformly distributed . Background technique [0002] Tunable Laser Absorption Spectroscopy (TDLAS) is an effective method in the field of accurate measurement of temperature and substance concentration due to its fast, non-invasive, sensitive, and on-site measurement of multiple flow field parameters, and is widely used in combustion diagnosis. , combustion control and other aspects, the application potential is huge and the prospect is promising. [0003] Single-path laser absorption spectroscopy with two absorption lines is used to obtain the average temperature and component concentration of the flow field alo...

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): G01K11/00
CPCG01K11/00
Inventor 徐立军曹章陈亚婧邱爽郭宇东
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap