Trace nitrous oxide gas detection device

A technology for nitrous oxide and gas detection, applied in the measurement of color/spectral characteristics, etc., can solve problems such as large transmission loss, poor stability, complex structure, etc., to increase stability and reliability, reduce loss problems, and solve optical path too short effect

Inactive Publication Date: 2015-03-04
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
View PDF15 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the single-path gas cell, although the multi-path gas cell is smaller in size and has a longer effective absorption distance, its structure is more complicated, it is difficult to manufacture and debug, an...

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
  • Trace nitrous oxide gas detection device
  • Trace nitrous oxide gas detection device
  • Trace nitrous oxide gas detection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Combine below Figure 1 to Figure 6 , the present invention is described in further detail.

[0014] refer to figure 1 , figure 2 , a trace nitrous oxide gas detection device, comprising an infrared laser output module 10, N 2 O absorbing gas chamber 20 and signal processing module 30, the laser center wavelength of described infrared laser output module 10 output and N 2 O gas absorption peak position coincides with that of N 2 The O absorption gas chamber 20 includes a hollow microstructured fiber 21, the peripheral wall of the hollow microstructured fiber 21 is provided with a microhole 211 in the radial direction, and the laser output from the infrared laser output module 10 is transmitted to the hollow microstructured fiber 21 through the single-mode fiber 40 One end, through the inner N of the hollow microstructured optical fiber 21 2 The laser light absorbed by the O gas is output to the signal processing module 30 from the other end of the hollow microstru...

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
Lengthaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of low-concentration gas detection and in particular relates to a trace nitrous oxide gas detection device. The device comprises an infrared laser output module, an N2O absorption gas chamber and a signal processing module, wherein the central wavelength of laser output by the infrared laser output module is matched with the position of an N2O gas absorption peak; the N2O absorption gas chamber comprises a hollow microstructure fiber; micro pores are formed in the peripheral wall of the hollow microstructure fiber along the radial direction; the laser output by the infrared laser output module is transmitted to one end of the hollow microstructure fiber by virtue of a single mode fiber; laser subjected to N2O gas absorption in the hollow microstructure fiber is output to the signal processing module from the other end of the hollow microstructure fiber by virtue of a multimode fiber; and the N2O gas content is calculated by the signal processing module according to the laser loss. The problem that the light path is short is fundamentally solved when the gas concentration is detected by a tunable laser spectral absorption method; and moreover, the transmission loss is avoided, and the accuracy and reliability of the measurement result are improved.

Description

technical field [0001] The invention relates to the technical field of low-concentration gas detection, in particular to a trace nitrous oxide gas detection device. Background technique [0002] Nitrous oxide (N 2 O) is one of the major greenhouse gases, with about one-third of the N in the atmosphere 2 O comes from human activities, while N emitted from agriculture 2 O accounts for approximately 2 52% of the total O. Research shows that agricultural N 2 O emissions are produced by the nitrification-denitrification of nitrogen fertilizers (mainly nitrate fertilizers) in the soil, and the unreasonable application of nitrogen fertilizers will directly lead to agricultural N 2 O Excessive emissions. Therefore, accurate monitoring of N in the farmland environment 2 O concentration can provide basic scientific data and theoretical reference for rational fertilization in agriculture and formulation of environmental protection policies. [0003] Currently used for low conce...

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): G01N21/39
Inventor 郑守国曾新华李淼张健翁士状李华龙陈友安陈诚万莉高翔
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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