WO2014132046A3 - Photoacoustic chemical detector - Google Patents

Photoacoustic chemical detector Download PDF

Info

Publication number
WO2014132046A3
WO2014132046A3 PCT/GB2014/050548 GB2014050548W WO2014132046A3 WO 2014132046 A3 WO2014132046 A3 WO 2014132046A3 GB 2014050548 W GB2014050548 W GB 2014050548W WO 2014132046 A3 WO2014132046 A3 WO 2014132046A3
Authority
WO
WIPO (PCT)
Prior art keywords
photoacoustic
chemical detector
light source
liquid
sample
Prior art date
Application number
PCT/GB2014/050548
Other languages
French (fr)
Other versions
WO2014132046A2 (en
Inventor
Hideaki Page
Original Assignee
Scytronix Ltd
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
Priority to GB1303546.4 priority Critical
Priority to GB201303546A priority patent/GB2511327A/en
Application filed by Scytronix Ltd filed Critical Scytronix Ltd
Publication of WO2014132046A2 publication Critical patent/WO2014132046A2/en
Publication of WO2014132046A3 publication Critical patent/WO2014132046A3/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1702Systems 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03Cuvette constructions
    • G01N2021/0378Shapes
    • G01N2021/0382Frustoconical, tapered cell
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1702Systems 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
    • G01N2021/1704Systems 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

Abstract

The invention relates to a photoacoustic chemical detector for detecting one or more target chemicals in a sample gas or liquid, a method of detecting one or more target chemicals in a sample gas or liquid using a photoacoustic chemical detector, and a photoacoustic sensor for use in a photoacoustic chemical detector. The light source (e.g. Fabry-Perot laser) output is encoded by controlling the drive current, drive voltage and/or operating temperature in order to produce a known multimode emission (having known peaks of intensity at known frequencies) that is used to irradiate a sample gas or liquid within a specially designed photoacoustic sensor, which generates an acoustic signal that is detected by a microphone. The encoded drive signal applied to the light source results in a varying trace in the photoacoustic signal that can be used to analyse and identify the of the sample in the photoacoustic cell. The photoacoustic signal is the convolution of the programmed frequency encoding of the light source with the absorption spectrum of the sample.
PCT/GB2014/050548 2013-02-28 2014-02-24 Photoacoustic chemical detector WO2014132046A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1303546.4 2013-02-28
GB201303546A GB2511327A (en) 2013-02-28 2013-02-28 Photoacoustic Chemical Detector

Publications (2)

Publication Number Publication Date
WO2014132046A2 WO2014132046A2 (en) 2014-09-04
WO2014132046A3 true WO2014132046A3 (en) 2014-11-06

Family

ID=48092240

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2014/050548 WO2014132046A2 (en) 2013-02-28 2014-02-24 Photoacoustic chemical detector

Country Status (2)

Country Link
GB (1) GB2511327A (en)
WO (1) WO2014132046A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR102014020098A2 (en) * 2013-08-29 2015-11-24 Gen Electric method and system

Citations (12)

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WO1991014176A1 (en) * 1990-03-05 1991-09-19 Fls Airloq A/S Method and apparatus for the transmission of an acoustic signal in a photoacoustic cell
US5917193A (en) * 1995-01-14 1999-06-29 Schroff; Gerhart Method and apparatus for detecting leaks in a container
US20020093658A1 (en) * 2000-11-30 2002-07-18 Tao Han Portable dual frequency photoacoustic spectrometer
DE10308409A1 (en) * 2003-02-27 2004-09-09 Hinrich Dr. Groninga Measurement of concentration or concentration ratios of gas components, for potential use in breath analysis of a patient's digestion/metabolism, uses a structured laser beam where sound waves are detected and evaluated
WO2005093390A1 (en) * 2004-03-29 2005-10-06 Noveltech Solutions Oy Method and system for detecting one or more gases or gas mixtures and/or for measuring the concentration of one or more gases or gas mixtures
US20060254340A1 (en) * 2005-05-16 2006-11-16 Mourad Baraket Optoacoustic gas sensor
WO2006127971A2 (en) * 2005-05-26 2006-11-30 Araz Yacoubian Broadband imager
US20070229834A1 (en) * 2004-10-22 2007-10-04 Patel C Kumar N System and method for high sensitivity optical detection of gases
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
US20080159341A1 (en) * 2006-06-23 2008-07-03 Patel C Kumar N Tunable quantum cascade lasers and photoacoustic detection of trace gases, TNT, TATP and precursors acetone and hydrogen peroxide
WO2010030043A1 (en) * 2008-09-12 2010-03-18 Canon Kabushiki Kaisha Biological information imaging apparatus
EP2402735A2 (en) * 2010-06-30 2012-01-04 Honeywell International, Inc. Enhanced cavity for a photoacoustic gas sensor

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US4457162A (en) * 1982-09-17 1984-07-03 Institute Of Gas Technology Multi-frequency photo-acoustic detector
DK247786D0 (en) * 1986-05-27 1986-05-27 Brueel & Kjaer As Photo acoustic gas analyzer
DE4034375A1 (en) * 1990-10-29 1992-04-30 Diehl Gmbh & Co Acousto=optical gas measuring device - with pollutant enrichment cell preceding measuring chamber
GB2271181A (en) * 1992-09-30 1994-04-06 Marconi Gec Ltd Photoacoustic Gas Analyser.
JP2002328116A (en) * 2001-04-27 2002-11-15 Yamatake Corp Photoacoustic gas sensor
US7826509B2 (en) * 2006-12-15 2010-11-02 President And Fellows Of Harvard College Broadly tunable single-mode quantum cascade laser sources and sensors
EP1990629A1 (en) * 2007-05-07 2008-11-12 Core Enterprises Inc. Low-power fast infrared gas sensor, hand held gas leak detector, and gas monitor utilizing absorptive-photo-acoustic detection
SE533936C2 (en) * 2009-07-10 2011-03-08 Optac Hb Device for measuring the concentration and characteristics of particles in a fluid and a method thereof
GB2492841A (en) * 2011-07-15 2013-01-16 Secr Defence Laser photoacoustic spectroscopy using a plurality of tuneable lasers

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991014176A1 (en) * 1990-03-05 1991-09-19 Fls Airloq A/S Method and apparatus for the transmission of an acoustic signal in a photoacoustic cell
US5917193A (en) * 1995-01-14 1999-06-29 Schroff; Gerhart Method and apparatus for detecting leaks in a container
US20020093658A1 (en) * 2000-11-30 2002-07-18 Tao Han Portable dual frequency photoacoustic spectrometer
DE10308409A1 (en) * 2003-02-27 2004-09-09 Hinrich Dr. Groninga Measurement of concentration or concentration ratios of gas components, for potential use in breath analysis of a patient's digestion/metabolism, uses a structured laser beam where sound waves are detected and evaluated
WO2005093390A1 (en) * 2004-03-29 2005-10-06 Noveltech Solutions Oy Method and system for detecting one or more gases or gas mixtures and/or for measuring the concentration of one or more gases or gas mixtures
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
US20070229834A1 (en) * 2004-10-22 2007-10-04 Patel C Kumar N System and method for high sensitivity optical detection of gases
US20060254340A1 (en) * 2005-05-16 2006-11-16 Mourad Baraket Optoacoustic gas sensor
WO2006127971A2 (en) * 2005-05-26 2006-11-30 Araz Yacoubian Broadband imager
US20080159341A1 (en) * 2006-06-23 2008-07-03 Patel C Kumar N Tunable quantum cascade lasers and photoacoustic detection of trace gases, TNT, TATP and precursors acetone and hydrogen peroxide
WO2010030043A1 (en) * 2008-09-12 2010-03-18 Canon Kabushiki Kaisha Biological information imaging apparatus
EP2402735A2 (en) * 2010-06-30 2012-01-04 Honeywell International, Inc. Enhanced cavity for a photoacoustic gas sensor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BARBIERI STEFANO ET AL: "Gas detection with quantum cascade lasers: An adapted photoacoustic sensor based on Helmholtz resonance", REVIEW OF SCIENTIFIC INSTRUMENTS, AIP, MELVILLE, NY, US, vol. 73, no. 6, 1 June 2002 (2002-06-01), pages 2458-2461, XP012040077, ISSN: 0034-6748, DOI: 10.1063/1.1480463 *

Also Published As

Publication number Publication date
WO2014132046A2 (en) 2014-09-04
GB201303546D0 (en) 2013-04-10
GB2511327A (en) 2014-09-03

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