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WO2000054045A1 - Systemes de capteurs chimiques - Google Patents

Systemes de capteurs chimiques Download PDF

Info

Publication number
WO2000054045A1
WO2000054045A1 PCT/GB2000/000809 GB0000809W WO0054045A1 WO 2000054045 A1 WO2000054045 A1 WO 2000054045A1 GB 0000809 W GB0000809 W GB 0000809W WO 0054045 A1 WO0054045 A1 WO 0054045A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
samples
sensors
sample
processing means
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.)
Ceased
Application number
PCT/GB2000/000809
Other languages
English (en)
Inventor
Andrew Pike
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.)
Teledyne UK Ltd
Original Assignee
Marconi Applied Technologies 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
Application filed by Marconi Applied Technologies Ltd filed Critical Marconi Applied Technologies Ltd
Priority to AU29286/00A priority Critical patent/AU2928600A/en
Priority to JP2000604219A priority patent/JP2004506174A/ja
Priority to EP00907819A priority patent/EP1159608A1/fr
Publication of WO2000054045A1 publication Critical patent/WO2000054045A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G01N33/0011—Sample conditioning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/26—Devices for withdrawing samples in the gaseous state with provision for intake from several spaces
    • 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

Definitions

  • This invention relates to chemical sensor systems, and more particularly for at- or on ⁇
  • Chemical sensor array systems may be used in assessing these characteristics.
  • the present invention seeks to provide a chemical sensor system which is particularly suitable for at-line or on-line monitoring.
  • a chemical sensor system for at or online monitoring of a product or process comprising: sampling means arranged to acquire
  • sensor means including an array of sensors arranged to sense the samples; and processing means for deriving information from the output of the sensor means concerning
  • At-line means that a monitoring instrument is located
  • on-line is defined to mean that there is a physical connection between the monitoring system and the detection point, which allows the
  • plurality of different locations may be nominally the same substance or it could be another
  • a process to be monitored may involve one or more
  • the sampling means may be incorporated as part of the sensor means, with sensors of the sensor means being placed at a detection point of interest.
  • the sampling means might
  • liquid headspace liquid sparge; sample vaporisation; a probe; solid head space; direct insertion of an array of liquid phase chemical sensors into the sample or sample stream; gas
  • a sample handling apparatus extracting a sample from a liquid head space is suitable
  • Liquid sparge comprises flushing a
  • a probe may comprise, for example, a
  • a gas line might be used in which a sample is drawn off
  • a sample handling module may use an ambient technique such as passive monitoring of the local environment, for example, for fire detection. Other techniques may be appropriate for
  • a sensor array may
  • the sample handling means may be such as to acquire a sample without operator
  • batched and continuous sampling may take place depending on the particular time in a
  • the sampling apparatus includes means to introduce a calibration or
  • the distributed chemical sensor system may provide information concerning the
  • SCAD A System Control and Data Acquisition
  • Feedback may also be provided to the monitoring system itself, for example, to adjust sensor
  • the sensor means comprises a plurality of sensor
  • each sensor array module may be located at the detection point at which the sample is acquired.
  • a change in a physical property such as a change in electrical
  • the sensor means are technologies for use in the sensor means.
  • the sensor means are technologies for use in the sensor means.
  • the sensor means are inexpensive to use in the sensor means.
  • the sensor means are inexpensive to use in the sensor means.
  • calorimetric sensors for example, amperometric, potentiometric or
  • Mass sensitive sensors may be for example those using
  • capacitance sensors may be for example chemo-resistors based on conducting polymer or metal oxide semiconductor materials.
  • Calorimetric sensors may for example be pellistors.
  • Electrochemical sensors are for example potentiometric cells. Infra red and fibre optic based
  • electrochemical sensors may be particularly suitable for liquid phase sensing.
  • a system in accordance with the invention may include a sensor array having sensors
  • the sensor environment can be specifically tailored
  • the sensor array includes
  • sensor arrays of differing technology types or different combinations of technology types may be included in a system.
  • the processing means may be arranged to simultaneously accept information relating
  • the processing means may classify substances at
  • the processing means uses pattern recognition to characterise the
  • the pattern recognition technique used in the processing module may use at least
  • a statistical method for example, principal component analysis (PCA)
  • PCA principal component analysis
  • MDA multiple discriminant analysis
  • FIG. 1 schematically illustrates a chemical sensor system in accordance with the
  • a chemical sensor array system is used to monitor a
  • the monitoring system includes a sampler 1 at
  • a first point A at which a sample of the substance is extracted using an appropriate sampling technique.
  • a sample is taken at fixed timing intervals.
  • the sample is housed is connected via a pipe to a sensor array module 2 in such a way that
  • the output of the sensors is determined by their response to the volatiles to which they belong
  • the sensor array module 2 combines a plurality of different sensor
  • central processor 3 accesses the outputs of the sensor array module 2 via a fixed link 4 to
  • a second sampler 5 is arranged to take samples downstream of location A at a second
  • a sample is taken by the sample handling means 5 in a way appropriate to the form of the
  • the sample is presented to a second sensor array module 6 which is located locally to the sample handling means 5.
  • the second sensor array module 6 is located locally to the sample handling means 5.
  • the central processor 3 is arranged to apply a suitable pattern recognition technique to
  • the processor 3 then assesses the data required from the second sensor array module 6.
  • the central processor 3 provides an overview of the production line as a whole to characterise the entire
  • a user interface 8 which in this case takes the form of a visual display from which an operator
  • the user interface 8 permits the
  • control data for example, to vary the frequency at which samples are taken
  • processor 3 detects rapid changes in characteristics of a set of samples, it may send control
  • the central processor 3 is also linked via line 9 to a manufacture control system 10
  • the central processor 3 may be set up so that it is able to acquire data communicated
  • a pattern recognition technique may be applied to each sensor array module in turn or to a plurality of sensor array modules simultaneously.
  • a user interface 19 is
  • the processor elements of the module 18 comprise a single board computer (SBC) 21
  • the user interface includes a flat panel
  • the SBC 21 is connected to sensor modules 14, 15 and 16 via an asynchronous RS 485 multi-drop
  • a power supply unit (psu) 25 is also included in enclosure 20.
  • One of the sensor modules 14 is illustrated in Figure 4 and includes means for
  • the sensor and control hardware 30 require interface electronics 28 to make them compatible
  • the microcomputer 29 acquires sensor data
  • RS 485 driver IC 31 is required to interface the signals over the data communications bus 17
  • the data link is 19,200 baud
  • data mode is 8 data bits, 1 stop bit, even parity. This can be reconfigured for different
  • the SBC 21 will communicate with a sensor module 14, 15 or 16 via a number of
  • commands e.g. idle mode, acquire data, cleanup mode, diagnostics.
  • Other commands relating to idle mode e.g. idle mode, acquire data, cleanup mode, diagnostics.
  • a sensor module may send a
  • Each sensor module has a unique identifying number that is used by the SBC to identify the recipient of a
  • each sensor module is polled in turn
  • An application that can benefit from this invention is a process plant that has its effluent monitored in order that its chemical composition does not exceed levels set by
  • a sensor module can be installed at each

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)

Abstract

Cette invention se rapporte à un système de capteurs chimiques, dans lequel les échantillons sont prélevés en de multiples points et ensuite traités par un seul module processeur, de façon à permettre un contrôle en ligne ou en direct d'un produit ou d'un processus.
PCT/GB2000/000809 1999-03-05 2000-03-06 Systemes de capteurs chimiques Ceased WO2000054045A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU29286/00A AU2928600A (en) 1999-03-05 2000-03-06 Chemical sensor systems
JP2000604219A JP2004506174A (ja) 1999-03-05 2000-03-06 化学的センサシステム
EP00907819A EP1159608A1 (fr) 1999-03-05 2000-03-06 Systemes de capteurs chimiques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9905051.0 1999-03-05
GBGB9905051.0A GB9905051D0 (en) 1999-03-05 1999-03-05 Chemical sensor systems

Publications (1)

Publication Number Publication Date
WO2000054045A1 true WO2000054045A1 (fr) 2000-09-14

Family

ID=10849003

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/000809 Ceased WO2000054045A1 (fr) 1999-03-05 2000-03-06 Systemes de capteurs chimiques

Country Status (5)

Country Link
EP (1) EP1159608A1 (fr)
JP (1) JP2004506174A (fr)
AU (1) AU2928600A (fr)
GB (2) GB9905051D0 (fr)
WO (1) WO2000054045A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002048700A3 (fr) * 2000-12-14 2003-09-25 Henkel Kgaa Procede de classification de substances chimiques selon leurs caracteristiques olfactives
WO2004076496A3 (fr) * 2003-02-25 2005-03-10 Kerr Mcgee Chemical Llc Procede de production de dioxyde de titane ameliore

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1401566A (en) * 1972-10-28 1975-07-16 Kneer F Process for converting sewage sludge into compost
US5025653A (en) * 1988-06-04 1991-06-25 Conducta Gesellschaft Fur Meb- Und Regeltechnik Gas detection system
US5131746A (en) * 1991-01-22 1992-07-21 The United States Of America As Represented By The United States Department Of Energy On-line process control monitoring system
EP0501682A2 (fr) * 1991-03-01 1992-09-02 Archer-Daniels-Midland Company Appareil pour la détermination de la stabilité de la graisse et de l'huile
EP0696005A2 (fr) * 1994-08-04 1996-02-07 Fluke Corporation Système à bord de mesure

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476674A1 (fr) * 1990-09-20 1992-03-25 Decisions Investments Corp. Système d'échantillonnage et d'analyse d'air
US5910765A (en) * 1993-11-02 1999-06-08 Advanced Optical Controls, Inc. Sensor module
US5675070A (en) * 1996-02-09 1997-10-07 Ncr Corporation Olfatory sensor identification system and method
US5946083A (en) * 1997-10-01 1999-08-31 Texas Instruments Incorporated Fixed optic sensor system and distributed sensor network

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1401566A (en) * 1972-10-28 1975-07-16 Kneer F Process for converting sewage sludge into compost
US5025653A (en) * 1988-06-04 1991-06-25 Conducta Gesellschaft Fur Meb- Und Regeltechnik Gas detection system
US5131746A (en) * 1991-01-22 1992-07-21 The United States Of America As Represented By The United States Department Of Energy On-line process control monitoring system
EP0501682A2 (fr) * 1991-03-01 1992-09-02 Archer-Daniels-Midland Company Appareil pour la détermination de la stabilité de la graisse et de l'huile
EP0696005A2 (fr) * 1994-08-04 1996-02-07 Fluke Corporation Système à bord de mesure

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
GOEPEL W: "CHEMOSENSOREN MIT ELEKTRISCHEN TRANSDUCERN", TECHNISCHES MESSEN TM,DE,R.OLDENBOURG VERLAG. MUNCHEN, vol. 62, no. 5, 1 May 1995 (1995-05-01), pages 186 - 197, XP000533425, ISSN: 0171-8096 *
J. MITROVICS ET AL.: "Hybrid Modular Sensor System: a New Generation of Electronic Noses", IEEE INT. SYMPOSIUM ON INDUSTRIAL ELECTRONICS, vol. 1, 7 July 1997 (1997-07-07) - 11 July 1997 (1997-07-11), Guimaraes (Portugal), pages 116 - 121, XP000887386 *
ULMER H ET AL: "Odours and flavours identified with hybrid modular sensor systems", SENSORS AND ACTUATORS B,CH,ELSEVIER SEQUOIA S.A., LAUSANNE, vol. 43, no. 1-3, 1 September 1997 (1997-09-01), pages 24 - 33, XP004103421, ISSN: 0925-4005 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002048700A3 (fr) * 2000-12-14 2003-09-25 Henkel Kgaa Procede de classification de substances chimiques selon leurs caracteristiques olfactives
WO2004076496A3 (fr) * 2003-02-25 2005-03-10 Kerr Mcgee Chemical Llc Procede de production de dioxyde de titane ameliore
EP2272799A3 (fr) * 2003-02-25 2011-09-14 Tronox LLC Procédé de préparation de dioxyde de titane
EP2272798A3 (fr) * 2003-02-25 2011-09-14 Tronox LLC Procédé de préparation de dioxyde de titane

Also Published As

Publication number Publication date
GB9905051D0 (en) 1999-04-28
AU2928600A (en) 2000-09-28
EP1159608A1 (fr) 2001-12-05
GB2348009A (en) 2000-09-20
GB0005358D0 (en) 2000-04-26
JP2004506174A (ja) 2004-02-26

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