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

Multiple calibration index gas composition distinguishing and recognition method

A gas composition and identification method technology, applied in the detection field, can solve the problems of difficult further improvement of sensor selectivity and sensitivity, limited selectivity and sensitivity, and restricted gas sensitivity characteristics, so as to improve work stability and selectivity and sensitivity, the effect of improving core performance

Inactive Publication Date: 2010-11-17
SHANGHAI JIAOTONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This detection method has limited selectivity and sensitivity when detecting trace substances, because the influence of α on the change of discharge current amplitude is a statistical result caused by the impact ionization of a large number of particles. Therefore, the gas-sensing characteristics of current amplitude bound to be limited by the number of gas molecules
It can be seen that the selectivity and sensitivity of the sensor determined by the above detection methods are difficult to further improve

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019]The first step: form a three-pole structure of "discharge electrode positive electrode-discharge electrode negative electrode-detection electrode"; the discharge electrode positive electrode is a multilayer structure composed of "glass substrate-gold film with a thickness of 300nm-carbon nanotube film with a thickness of 3μm" , the average diameter of carbon nanotubes is 40 nanometers, due to the electric field polarization effect of carbon nanotubes, partial self-sustained discharge can occur in the area adjacent to the surface of the positive electrode of the discharge electrode, and the area of ​​the carbon tube film is 4mm×4mm; the negative electrode of the discharge electrode consists of four Nickel columns with a diameter of 0.8mm and a length of 1cm are arranged parallel to the positive electrode of the discharge electrode at a distance of 1mm, and the gap between the negative electrode of the discharge electrode and the positive electrode of the discharge electrode...

Embodiment 2

[0024] The first step: form a three-pole structure of "discharge electrode positive electrode-discharge electrode negative electrode-detection electrode"; the discharge electrode positive electrode is a multilayer structure composed of "glass substrate-gold film with a thickness of 300nm-carbon nanotube film with a thickness of 3μm" , the average diameter of carbon nanotubes is 40nm, due to the electric field polarization effect of carbon nanotubes, partial self-sustained discharge can occur in the area adjacent to the surface of the positive electrode of the discharge electrode, and the area of ​​the carbon tube film is 4mm×4mm; the negative electrode of the discharge electrode consists of a A silicon substrate with a diameter of 0.6 mm and 5 × 5 through holes in length and width, the center-to-center spacing of each through hole is 1.5 mm, and the side of the negative electrode of the discharge electrode facing the positive electrode of the discharge electrode is covered with ...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a discrimination and recognition method of a gas composition with a plurality of standardized indicators, which belongs to the detection technological field. The invention takes ion current produced by local self-maintained discharge as a detection object, forms a discharge zone and a detection zone through a three-stage structure of 'discharge electrode anode-discharge electrode cathode-detection electrode', measures the ion current of a certain gas composition formed at different electric field strengths in the detection zone through changing the loaded voltage of the detection electrode, and takes the 'measured loaded voltage-detection electrode current' relationship as the indicators designating the gas composition. When recognizing the gas composition, a measured valve of the detection electrode current under the same loaded voltage is compared with a designated value. The discrimination and recognition method can significantly improve selectivity and sensibility of a field ionized gas sensor; relative to a clearance breakdown electric feature detection method, the discrimination and recognition method can greatly improve the stability, service life, reliability and identification accuracy of the device.

Description

technical field [0001] The invention relates to a method in the technical field of detection, in particular to a method for distinguishing and identifying gas components of multiple calibration indexes. Background technique [0002] There are many kinds of gas molecules, and there are many gas recognition methods to identify the type and relative content of gas molecules. However, how to improve the selectivity, sensitivity, stability and lifespan has always been the most difficult technical problem faced by various gas sensors. For the "molecular ionization gas sensor" based on the electrical specificity in the field-induced gas molecule ionization process, due to the direct application of the specificity of different gas molecules in the field ionization and charge transport process, thus It can realize the detection and identification of the molecular composition in the gas. Therefore, it has many features and advantages in the sensing mechanism and has good application ...

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): G01N27/70
Inventor 侯中宇蔡炳初
Owner SHANGHAI JIAOTONG 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