GB201112171D0 - Method and apparatus for gas monitoring and detection - Google Patents

Method and apparatus for gas monitoring and detection

Info

Publication number
GB201112171D0
GB201112171D0 GBGB1112171.2A GB201112171A GB201112171D0 GB 201112171 D0 GB201112171 D0 GB 201112171D0 GB 201112171 A GB201112171 A GB 201112171A GB 201112171 D0 GB201112171 D0 GB 201112171D0
Authority
GB
United Kingdom
Prior art keywords
lasers
analytes
cell
excite
photoacoustic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GBGB1112171.2A
Other versions
GB2492841A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB1112171.2A priority Critical patent/GB2492841A/en
Publication of GB201112171D0 publication Critical patent/GB201112171D0/en
Priority to PCT/GB2012/000588 priority patent/WO2013011253A1/en
Publication of GB2492841A publication Critical patent/GB2492841A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2418—Probes using optoacoustic interaction with the material, e.g. laser radiation, photoacoustics
    • G01N29/2425—Probes using optoacoustic interaction with the material, e.g. laser radiation, photoacoustics optoacoustic fluid cells therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/46—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by spectral analysis, e.g. Fourier analysis or wavelet analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
    • G01N2021/1704—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in gases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
    • G01N2021/396—Type of laser source
    • G01N2021/399—Diode laser
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/021—Gases

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

A laser photoacoustic spectroscopy (PAS) apparatus for detecting gaseous analytes comprises a plurality of tuneable lasers, such as wavelength tuneable diode lasers (TDLs) and a photoacoustic cell 12, where each of the lasers is tuned to excite one or more of the analytes of interest. The apparatus may include a Michelson interferometer 16 that is used to measure an acoustic signal produced by a cantilever microphone 14 located in the photoacoustic cell and the cell may comprise a sample chamber and a balancing chamber. The outputs from the lasers may be coupled into a single beam used to excite the analytes simultaneously or sequentially using signal multiplexing techniques. Accurate monitoring of gas species at low concentrations may be achieved, such as is suitable for assessing ageing of materials based on the physical and chemical processes indicated by the gases evolved or consumed by the materials.
GB1112171.2A 2011-07-15 2011-07-15 Laser photoacoustic spectroscopy using a plurality of tuneable lasers Withdrawn GB2492841A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1112171.2A GB2492841A (en) 2011-07-15 2011-07-15 Laser photoacoustic spectroscopy using a plurality of tuneable lasers
PCT/GB2012/000588 WO2013011253A1 (en) 2011-07-15 2012-07-12 Method and apparatus for gas monitoring and detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1112171.2A GB2492841A (en) 2011-07-15 2011-07-15 Laser photoacoustic spectroscopy using a plurality of tuneable lasers

Publications (2)

Publication Number Publication Date
GB201112171D0 true GB201112171D0 (en) 2011-08-31
GB2492841A GB2492841A (en) 2013-01-16

Family

ID=44586644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1112171.2A Withdrawn GB2492841A (en) 2011-07-15 2011-07-15 Laser photoacoustic spectroscopy using a plurality of tuneable lasers

Country Status (2)

Country Link
GB (1) GB2492841A (en)
WO (1) WO2013011253A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103134773B (en) * 2013-02-06 2015-08-05 北京东方计量测试研究所 TDLAS temperature survey and calibration vacuum chamber
EP2770319B2 (en) 2013-02-25 2022-01-26 Sick Ag Gas measuring device
GB2511327A (en) * 2013-02-28 2014-09-03 Scytronix Ltd Photoacoustic Chemical Detector
EP3012616A1 (en) * 2014-10-22 2016-04-27 Services Petroliers Schlumberger A system and method for analyzing a gaseous sample extracted from a drilling fluid coming from a wellbore
CN105510233A (en) * 2015-12-25 2016-04-20 哈尔滨工业大学 Photoacoustic-spectral gas sensor with multi-point measurement capacity and measurement method
CN106505404B (en) * 2016-12-13 2023-08-01 深圳市唯锐科技有限公司 Laser control system and method based on TDLAS
EP3615919B1 (en) * 2017-04-28 2023-09-13 GasPorOx AB Apparatus and method for measuring concentration of multiple gases in a headspace of closed containers for food or pharmaceuticals using tdlas
CN109115688B (en) * 2018-09-10 2020-11-03 大连理工大学 Optical fiber remote measuring type multifunctional gas leakage listening instrument and method
CN110441241B (en) * 2019-07-31 2023-01-06 中国电力科学研究院有限公司 Performance evaluation device and method for photoacoustic spectroscopy multi-component gas analysis instrument
CN112540059A (en) * 2019-09-20 2021-03-23 天津科技大学 Ethylene detection method based on TDLAS technology
CN110779891B (en) * 2019-11-05 2022-03-15 北华航天工业学院 Method for monitoring carbon dioxide concentration by tunable semiconductor laser
CN111007033B (en) * 2019-12-09 2022-08-30 温州大学 Trace acetylene gas concentration detection method based on spectrum and power spectrum feature fusion
CN111337435A (en) * 2020-04-14 2020-06-26 聊城大学 Multi-component trace gas sensor detection system and detection method thereof
CN113640248A (en) * 2021-07-06 2021-11-12 杭州春来科技有限公司 In-situ monitoring method for gas multi-component concentration
CN113933250A (en) * 2021-09-22 2022-01-14 苏州大学 Gas detection device, gas detection method and computer equipment
CN114088631A (en) * 2021-11-18 2022-02-25 国网安徽省电力有限公司电力科学研究院 Distributed online monitoring system and method for sulfur hexafluoride decomposition products
IT202100033143A1 (en) * 2021-12-30 2023-06-30 Consiglio Nazionale Ricerche Photoacoustic spectroscopy sensor for trace gas detection and method for trace gas detection

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088760A1 (en) * 1981-04-13 1983-09-21 AUSTRALIAN NUCLEAR SCIENCE & TECHNOLOGY ORGANISATION Measuring the concentration of gaseous hydrogen fluoride
AU2002250325A1 (en) * 2001-03-15 2002-10-03 Molecular Reflection Method for monitoring the oscillatory characteristics of a microfabricated resonant mass sensor
KR100419094B1 (en) * 2001-06-28 2004-02-19 (주)나노믹스 gas identification device
US7064329B2 (en) * 2001-08-21 2006-06-20 Franalytica, Inc. Amplifier-enhanced optical analysis system and method
US20030038237A1 (en) * 2001-08-21 2003-02-27 Pranalytica, Inc. Amplifier-enhanced optical analysis system and method
US7304742B1 (en) * 2004-10-09 2007-12-04 United States Of America As Represented By The Secretary Of The Army Flow-through aerosol photoacoustic systems and methods
US7710566B2 (en) * 2005-05-27 2010-05-04 Board Of Regents Of The Nevada System Of Higher Education On Behalf Of The Desert Research Institute Method and apparatus for photoacoustic measurements
US7903704B2 (en) * 2006-06-23 2011-03-08 Pranalytica, Inc. Tunable quantum cascade lasers and photoacoustic detection of trace gases, TNT, TATP and precursors acetone and hydrogen peroxide
US7826509B2 (en) * 2006-12-15 2010-11-02 President And Fellows Of Harvard College Broadly tunable single-mode quantum cascade laser sources and sensors
FR2951545B1 (en) * 2009-10-21 2014-01-03 Commissariat Energie Atomique PHOTOACOUSTIC GAS SENSOR

Also Published As

Publication number Publication date
WO2013011253A1 (en) 2013-01-24
GB2492841A (en) 2013-01-16

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)