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

Apparatus and method for determining presence of a gas

A technology of gas and profile, which is applied to determine the concentration of gas, obtain polarization-related radiation intensity measurement results, and remotely determine the existence of gas, which can solve the problems of huge settings and achieve a solid calibration effect

Pending Publication Date: 2021-02-12
LEIDEN UNIVERSITY
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stability requirements and sensitive alignments result in bulky setups

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
  • Apparatus and method for determining presence of a gas
  • Apparatus and method for determining presence of a gas
  • Apparatus and method for determining presence of a gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0145] An apparatus and method for determining the presence of a gas are provided. The apparatus and method can be used to determine the presence of a target gas within a volume of unknown gas composition. The apparatus and method may further be used to determine the radiation absorption or emission intensity of a gas, eg relative to a calibration reference or threshold. The device and method can be used to determine the concentration of a gas. The gas can be any gas with a known absorption or emission spectrum. The gas may be an atmospheric trace gas. Example gases that can be determined to be present can include NO 2 , O 3 , CO, CO 2 and CH 4 , but the device is not limited to detecting only these gases, and these are mentioned as examples only. Devices for determining the presence of gases may be used, for example, in remote sensing of atmospheric trace gases, for air pollution monitoring and source detection. The device could be used for ground-based air pollution ...

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

Apparatus (100) for determining presence of a gas (103) is provided, the apparatus (100) comprising: one or more retarders (109) to spectrally modulate polarisation of received radiation in accordancewith a plurality of polarised spectral modulation profiles which are offset in phase from each other, the radiation output from the one or more retarders (109) comprising radiation having polarisation spectrally modulated in accordance with the said plurality of polarised spectral modulation profiles in a common beam of radiation; one or more polarisers (147, 148); and radiation detectors (142, 144) to detect radiation output from the one or more retarders (109) filtered for respective polarisation states by the one or more polarisers (147, 148), the detectors (142, 144) selectively and separately detecting on different detectors at the same time polarised radiation conforming to each of at least first and second of the said polarised spectral modulation profiles to thereby provide at least respective first and second polarisation-dependent radiation intensity measurements from which the presence of the gas (103) can be determined.

Description

technical field [0001] Embodiments described herein generally relate to determining the presence of a gas. More specifically, but not exclusively, embodiments relate to obtaining polarization-dependent radiation intensity measurements from which the presence of gas can be determined. Some embodiments relate to remotely determining the presence of gas. Some embodiments relate to determining the concentration of a gas. Background technique [0002] Remote sensing of gases in the Earth's atmosphere is critical for air pollution monitoring, source detection, and gas leak detection. Many optical gas sensing instruments are based on spectroscopic measurements, where trace gases such as NO can be detected by their specific spectral features 2 or CH 4 . To obtain a two-dimensional image of the presence of trace gases, spectrometers typically use a scanning mechanism where the field of view can be scanned in both the spatial and spectral domains. Scanning mechanisms can take a ...

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): G01N21/21G01N21/31G01J3/433G01J4/04G02F1/01G01J3/447G01N21/17
CPCG01J3/433G01J3/447G01J4/04G01N21/21G01N21/31G01N2021/1795G01N2201/0616
Inventor 弗兰斯·斯尼克克里斯托夫·凯勒
Owner LEIDEN UNIVERSITY
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