SE9803019D0 - Detection of chemicals based on resistance fluctuation spectroscopy - Google Patents

Detection of chemicals based on resistance fluctuation spectroscopy

Info

Publication number
SE9803019D0
SE9803019D0 SE9803019A SE9803019A SE9803019D0 SE 9803019 D0 SE9803019 D0 SE 9803019D0 SE 9803019 A SE9803019 A SE 9803019A SE 9803019 A SE9803019 A SE 9803019A SE 9803019 D0 SE9803019 D0 SE 9803019D0
Authority
SE
Sweden
Prior art keywords
power
fluctuations
chemicals
density spectrum
sensor
Prior art date
Application number
SE9803019A
Other languages
Swedish (sv)
Other versions
SE9803019L (en
SE513148C2 (en
Inventor
Laszlo B Kiss
Claes-Goeran Granqvist
Jan Soederlund
Original Assignee
Laszlo B Kiss
Goeran Granqvist Claes
Jan Soederlund
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 Laszlo B Kiss, Goeran Granqvist Claes, Jan Soederlund filed Critical Laszlo B Kiss
Priority to SE9803019A priority Critical patent/SE513148C2/en
Publication of SE9803019D0 publication Critical patent/SE9803019D0/en
Priority to PCT/SE1999/001554 priority patent/WO2000014521A1/en
Priority to AU60158/99A priority patent/AU6015899A/en
Publication of SE9803019L publication Critical patent/SE9803019L/en
Publication of SE513148C2 publication Critical patent/SE513148C2/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
    • G01N33/0034—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array comprising neural networks or related mathematical techniques

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Biochemistry (AREA)
  • Evolutionary Computation (AREA)
  • Artificial Intelligence (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

The invention relates to a sensor-based electronic nose, and the general idea is to measure the noise fluctuations of the predetermined physical property, such as the resistance, of a sensor (120; 203; 213), and to determine a power-density spectrum of the noise fluctuations. The power-density spectrum of the fluctuations has turned out to be a sensitive tool for determining the composition of the chemicals applied to the sensor. The pattern of the power-density spectrum of the fluctuations is representative of the composition of the chemicals, and can be evaluated, manually or by means of an artificial neural network (160; 224), to determine the chemical composition. By dividing the power-density spectrum into a number of different frequency bands, where the nature of the response in each frequency band is different from that of the other bands, and using information of the power spectrum at each of these frequency bands, the number of sensors that are necessary to detect a given number of chemicals can be significantly reduced compared to conventional solutions.
SE9803019A 1998-09-07 1998-09-07 Detection of chemicals based on resistance fluctuation spectroscopy SE513148C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9803019A SE513148C2 (en) 1998-09-07 1998-09-07 Detection of chemicals based on resistance fluctuation spectroscopy
PCT/SE1999/001554 WO2000014521A1 (en) 1998-09-07 1999-09-07 Detection of chemicals based on resistance fluctuation-spectroscopy
AU60158/99A AU6015899A (en) 1998-09-07 1999-09-07 Detection of chemicals based on resistance fluctuation-spectroscopy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9803019A SE513148C2 (en) 1998-09-07 1998-09-07 Detection of chemicals based on resistance fluctuation spectroscopy

Publications (3)

Publication Number Publication Date
SE9803019D0 true SE9803019D0 (en) 1998-09-07
SE9803019L SE9803019L (en) 2000-03-08
SE513148C2 SE513148C2 (en) 2000-07-17

Family

ID=20412508

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9803019A SE513148C2 (en) 1998-09-07 1998-09-07 Detection of chemicals based on resistance fluctuation spectroscopy

Country Status (3)

Country Link
AU (1) AU6015899A (en)
SE (1) SE513148C2 (en)
WO (1) WO2000014521A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7809432B2 (en) 2002-04-12 2010-10-05 Infineon Technologies Ag Event detection—apparatus and method for measuring the activity of neural networks
WO2007070080A2 (en) 2005-05-04 2007-06-21 Brandt Innovative Technologies, Inc. Method and apparatus of detecting an object
CN101788440B (en) * 2010-01-15 2011-12-28 清华大学 Electronic nose used for food safety monitoring
WO2021061046A1 (en) * 2019-09-23 2021-04-01 National University Of Singapore An ai sensing device for a broad spectrum of gas and vapor detection

Also Published As

Publication number Publication date
SE9803019L (en) 2000-03-08
AU6015899A (en) 2000-03-27
WO2000014521A1 (en) 2000-03-16
SE513148C2 (en) 2000-07-17

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