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

Fixed point wavelength modulation gas concentration measurement device and measurement method based on wave number drift correction

A gas concentration measurement and drift correction technology, which is applied in the field of optical measurement, can solve the problems that the database cannot meet the measurement requirements, the wave number drift of the laser output center, and the impact on the accuracy of gas concentration measurement, etc., to achieve long-term stable monitoring and spectrum Narrow range, beneficial to the effect of multi-spectral coupling measurement

Active Publication Date: 2019-07-09
SOUTHEAST UNIV
View PDF7 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in an industrial environment with complex gas components, the gas composition and its concentration are unknown, so databases such as HITRAN cannot meet the measurement requirements
At the same time, during the gas concentration measurement process, environmental temperature changes, driving current and temperature drift, circuit aging and other issues will cause the center wave number of the laser output to drift, thus affecting the accuracy of gas concentration 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
  • Fixed point wavelength modulation gas concentration measurement device and measurement method based on wave number drift correction
  • Fixed point wavelength modulation gas concentration measurement device and measurement method based on wave number drift correction
  • Fixed point wavelength modulation gas concentration measurement device and measurement method based on wave number drift correction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but the scope of protection claimed by the present invention is not limited thereto.

[0041] Such as figure 1 As shown, the fixed-point wavelength modulation gas concentration measurement device based on wave number drift correction of the present invention sequentially includes a signal generation module 1, a gas measurement module 2, a signal receiving module 3 and a signal processing module 4; the signal generation module 1 includes a function generator 5 , laser controller 6, distributed feedback laser (DFB) 7, fiber optic beam splitter 8 and fiber optic collimator 9; The heating module 12 outside 11; the signal receiving module 3 is composed of three photodetectors 15; the gas 14 to be measured enters the measuring pool 11 with gas after being preheated by the heating pipe belt 13, and the heating module 12 keeps the measuring pool 11 maint...

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 discloses a fixed point wavelength modulation gas concentration measurement device based on wave number drift correction, and further discloses a fixed point wavelength modulation gas concentration measurement method based on wave number drift correction. According to the invention, by monitoring wave number correction gas concentration of a light emergent center of a laser in real time, bad influence of drift of the light emergent center on measurement in the long-term operation of the laser is overcome, and accurate measurement of calibration-free fixed point wavelength modulation is implemented; the method disclosed by the invention does not require an additional reference gas pool for calibrating gas concentration and is more beneficial to field severe environment measurement; in addition, a harmonic signal adopted by the method disclosed by the invention is narrow in spectrum occupied range, so as to benefit to multispectrum coupling measurement and facilitate implementing simultaneous online measurement on gas concentration of multiple components; and meanwhile, the method disclosed by the invention utilizes a line width obtained by measurement to participate incalculation on the gas concentration without utilizing excessive parameters in a spectral database, thereby eliminating influence of indeterminacy of spectrum parameters and component concentration.

Description

technical field [0001] The invention relates to a fixed-point wavelength modulation gas concentration measurement device based on wave number drift correction, and also relates to the above-mentioned fixed-point wavelength modulation gas concentration measurement method based on wave number drift correction, which belongs to the field of optical measurement technology. Background technique [0002] In recent years, although the process of industrialization has improved the quality of life and economic level of urban residents, it has also aggravated air pollution. With the society's increasing emphasis on environmental protection and the need to ensure safe and efficient industrial production, it is of great significance to accurately detect the concentration of atmospheric environmental gas pollutants and industrial process gases. Research and manufacturing can work on site for a long time, and it is accurate and fast The technology and equipment for accurately measuring ga...

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): G01N21/39G01N21/01
CPCG01N21/01G01N21/39
Inventor 周宾祝仰坤王一红
Owner SOUTHEAST 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