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

Real-time compensation method of measurement errors caused by spectrograph wavelength drift

A technology of wavelength drift and measurement error, applied in the measurement of color/spectral characteristics, etc., can solve the problems that the system calibration is no longer applicable to the system, the method is cumbersome, and the continuous monitoring instrument is not allowed, so as to improve the measurement accuracy, solve the measurement inaccuracy, Reduces the effect of instrument instability

Active Publication Date: 2014-12-10
NANJING GUODIAN ENVIRONMENTAL PROTECTION TECH
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, none of the spectrometers has the function of automatically calibrating the wavelength, and the wavelength calibration method provided by the spectrometer manufacturer is to calibrate the spectrometer through a mercury lamp or other characteristic light sources. stop working, which is not allowed for continuous monitoring instruments
In addition, taking out the spectrometer involves reinstalling the spectrometer. For continuous monitoring instruments, once reinstallation of parts is involved, the original system calibration may no longer be applicable to the reinstalled system. This is a problem for system maintenance personnel. heavy workload

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
  • Real-time compensation method of measurement errors caused by spectrograph wavelength drift
  • Real-time compensation method of measurement errors caused by spectrograph wavelength drift
  • Real-time compensation method of measurement errors caused by spectrograph wavelength drift

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] (The following combination Figure 1-Figure 4 , the present invention is described in further detail)

[0049] Take the absorption spectrum of NO as an example below, such as figure 2 The spectrometer shown has wavelength drift, and the specific implementation process is explained:

[0050] Step 1: Spectral data denoising

[0051] Since the absorption feature of the measured gas in the measurement light of a single scan of the spectrometer is not obvious, and the data has relatively large noise, the measurement data of 10 times are averaged to obtain the averaged measurement light spectrum data I 1 . Under the nitrogen gas situation, take 10 spectrometer measurement data and carry out average, obtain the reference light spectrum data I when there is no absorption 0 .

[0052] Step 2: Extract the absorbance of the measured gas

[0053] According to Lambert's law, for the NO gas to be measured, from I 1 Extract the wavelength band corresponding to absorption (223n...

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 designs a real-time compensation method of measurement errors caused by spectrograph wavelength drift. The method comprises the following steps: calculating the spectrograph wavelength drift by utilizing real-time measured spectral data of a measured gas and an absorption cross section database of the measured gas measured in a laboratory, and calculating the spectrograph wavelength drift; calculating a measured gas absorption cross section corresponding to a translational wavelength of the wavelength drift and measured gas absorbance for calculating concentration of the measured gas; eliminating the measurement errors caused by the wavelength drift in real time.

Description

technical field [0001] The invention relates to a real-time compensation method for the measurement error caused by the wavelength drift of a spectrometer. technical background [0002] The spectrometer is a device that detects the position and intensity of the corresponding wavelength of the spectral line with a photodetector. It is the core component of spectral absorption technology instruments such as ultraviolet differential absorption spectroscopy technology. With the continuous improvement of national flue gas emission standards, the existing infrared analysis instruments and conventional ultraviolet differential absorption spectroscopy technology have been difficult to meet the requirements of low detection limit, high sensitivity and high resolution of flue gas analysis, which is a long-term problem. The wavelength stability of the spectrometer, the core component of the ultraviolet differential absorption spectroscopic analysis instrument under the condition of tim...

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
IPC IPC(8): G01N21/31
Inventor 汤光华韩少鹏武善磊林正根苗丰杨剑孔红兵彭樟李利刘璐
Owner NANJING GUODIAN ENVIRONMENTAL PROTECTION TECH
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