WO2014132046A3 - Photoacoustic chemical detector - Google Patents
Photoacoustic chemical detector Download PDFInfo
- 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
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
-
- 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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N2021/0378—Shapes
- G01N2021/0382—Frustoconical, tapered cell
-
- 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
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.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB201303546A GB2511327A (en) | 2013-02-28 | 2013-02-28 | Photoacoustic Chemical Detector |
GB1303546.4 | 2013-02-28 |
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 (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR102014020098A2 (en) | 2013-08-29 | 2015-11-24 | Gen Electric | method and system |
FR3084746B1 (en) * | 2018-08-03 | 2020-10-16 | Mirsense | PHOTOACOUSTIC GAS SENSOR USING AN ILLUMINATION WAVELENGTH MODULATION METHOD |
FR3084745B1 (en) * | 2018-08-03 | 2020-10-30 | Mirsense | PHOTOACOUSTIC GAS SENSOR WITH ROBUST ARCHITECTURE AND STABLE OPTICAL ALIGNMENT |
EP3795980A1 (en) * | 2019-09-19 | 2021-03-24 | Nokia Technologies Oy | Photoacoustic apparatus and methods |
WO2022223384A1 (en) | 2021-04-20 | 2022-10-27 | Basf Se | A method of detecting one or more markers in a petroleum fuel using a photoacoustic detector |
CN114689517A (en) * | 2022-05-05 | 2022-07-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Horn-shaped photoacoustic cell for gas photoacoustic spectrum detection |
CN115128011B (en) * | 2022-08-31 | 2022-12-20 | 之江实验室 | Photoacoustic spectroscopy solid/liquid detection device based on acoustic metamaterial impedance matching |
Citations (12)
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 | Marcus Dr. Wolff | 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)
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 | PHOTOACUSTIC 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 | Apparatus for measuring the concentration and properties 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 |
-
2013
- 2013-02-28 GB GB201303546A patent/GB2511327A/en not_active Withdrawn
-
2014
- 2014-02-24 WO PCT/GB2014/050548 patent/WO2014132046A2/en active Application Filing
Patent Citations (12)
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 | Marcus Dr. Wolff | 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)
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 |
---|---|
GB201303546D0 (en) | 2013-04-10 |
GB2511327A (en) | 2014-09-03 |
WO2014132046A2 (en) | 2014-09-04 |
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