WO1999034198A3 - Fluid property and flow sensing via a common frequency generator and fast fourier transformation - Google Patents

Fluid property and flow sensing via a common frequency generator and fast fourier transformation Download PDF

Info

Publication number
WO1999034198A3
WO1999034198A3 PCT/US1998/025657 US9825657W WO9934198A3 WO 1999034198 A3 WO1999034198 A3 WO 1999034198A3 US 9825657 W US9825657 W US 9825657W WO 9934198 A3 WO9934198 A3 WO 9934198A3
Authority
WO
WIPO (PCT)
Prior art keywords
frequency generator
common frequency
fast fourier
fourier transformation
flow sensing
Prior art date
Application number
PCT/US1998/025657
Other languages
French (fr)
Other versions
WO1999034198A2 (en
Inventor
David Kubisiak
Ulrich Bonne
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Priority to DE69814474T priority Critical patent/DE69814474T2/en
Priority to JP2000526799A priority patent/JP2002500355A/en
Priority to EP98960696A priority patent/EP1068517B1/en
Priority to CA002316916A priority patent/CA2316916A1/en
Publication of WO1999034198A2 publication Critical patent/WO1999034198A2/en
Publication of WO1999034198A3 publication Critical patent/WO1999034198A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/6845—Micromachined devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/6842—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow with means for influencing the fluid flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G01F1/708—Measuring the time taken to traverse a fixed distance
    • G01F1/7084—Measuring the time taken to traverse a fixed distance using thermal detecting arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G01F1/708—Measuring the time taken to traverse a fixed distance
    • G01F1/712—Measuring the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F5/00—Measuring a proportion of the volume flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
    • G01N27/185—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested using a catharometer

Abstract

A method and apparatus for using a common frequency generator for measuring selected properties of a fluid of interest via one or more heater and/or sensor elements. The common frequency generator may sequentially and/or simultaneously provide input signals to selected heater and/or sensor elements. Application of more than one frequency component by the common frequency generator enables the determination of one or more time and/or phase lags more efficiently, especially when using an FFT analysis technique. From the time and/or phase lags, the selected fluid properties including fluid flow speed can be determined.
PCT/US1998/025657 1997-12-31 1998-12-03 Fluid property and flow sensing via a common frequency generator and fast fourier transformation WO1999034198A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69814474T DE69814474T2 (en) 1997-12-31 1998-12-03 MEASURING PROPERTIES OF A FLUID BY MEANS OF A COMMON FREQUENCY GENERATOR AND ALMOST FOURIER TRANSFORMATION (FFT)
JP2000526799A JP2002500355A (en) 1997-12-31 1998-12-03 Fluid characteristics and flow rate detection using the same frequency generator and FFT
EP98960696A EP1068517B1 (en) 1997-12-31 1998-12-03 Fluid property sensing via a common frequency generator and fast fourier transform
CA002316916A CA2316916A1 (en) 1997-12-31 1998-12-03 Fluid property and flow sensing via a common frequency generator and fast fourier transform

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/001,453 US6169965B1 (en) 1997-12-31 1997-12-31 Fluid property and flow sensing via a common frequency generator and FFT
US09/001,453 1997-12-31

Publications (2)

Publication Number Publication Date
WO1999034198A2 WO1999034198A2 (en) 1999-07-08
WO1999034198A3 true WO1999034198A3 (en) 1999-09-10

Family

ID=21696098

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/025657 WO1999034198A2 (en) 1997-12-31 1998-12-03 Fluid property and flow sensing via a common frequency generator and fast fourier transformation

Country Status (7)

Country Link
US (1) US6169965B1 (en)
EP (4) EP1068517B1 (en)
JP (1) JP2002500355A (en)
CA (1) CA2316916A1 (en)
DE (4) DE69830343T2 (en)
ES (1) ES2195426T3 (en)
WO (1) WO1999034198A2 (en)

Families Citing this family (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7258003B2 (en) * 1998-12-07 2007-08-21 Honeywell International Inc. Flow sensor with self-aligned flow channel
US6911894B2 (en) * 1998-12-07 2005-06-28 Honeywell International Inc. Sensor package for harsh environments
US6322247B1 (en) * 1999-01-28 2001-11-27 Honeywell International Inc. Microsensor housing
EP1085568B1 (en) * 1999-09-17 2004-07-07 STMicroelectronics S.r.l. Method for the electrical and mechanical interconnection of microelectronic components
US6502459B1 (en) 2000-09-01 2003-01-07 Honeywell International Inc. Microsensor for measuring velocity and angular direction of an incoming air stream
DE10123920B4 (en) * 2001-05-17 2006-02-02 Robert Bosch Gmbh Integrated microstructure sensor element for detecting thermodynamic quantities of a fluid
US6681623B2 (en) 2001-10-30 2004-01-27 Honeywell International Inc. Flow and pressure sensor for harsh fluids
US6776817B2 (en) * 2001-11-26 2004-08-17 Honeywell International Inc. Airflow sensor, system and method for detecting airflow within an air handling system
US6838287B2 (en) * 2001-12-20 2005-01-04 Honeywell International Inc. Fluid mixture composition sensor
AU2003241774A1 (en) * 2002-05-29 2003-12-12 Ckd Corporation Thermal flowmeter
DE10243013B4 (en) * 2002-09-17 2013-08-22 Robert Bosch Gmbh Sensor and method
US7000452B2 (en) * 2002-09-27 2006-02-21 Honeywell International Inc. Phased micro fluid analyzer
WO2004029602A2 (en) * 2002-09-27 2004-04-08 Honeywell International Inc. Phased micro analyser
US20040224422A1 (en) * 2002-09-27 2004-11-11 Ulrich Bonne Phased micro analyzer III, IIIA
US7104112B2 (en) * 2002-09-27 2006-09-12 Honeywell International Inc. Phased micro analyzer IV
DE10309205A1 (en) * 2003-02-28 2004-09-30 Abb Research Ltd. Method and circuit for operating a thermal conductivity detector
GB2401183B (en) * 2003-04-29 2006-10-18 Terence Mcburney Probe
DE10323651A1 (en) * 2003-05-26 2004-12-16 Rational Ag Method for determining material properties and device usable in this method
US7359929B2 (en) * 2003-11-12 2008-04-15 City University Of Hong Kong Fast solution of integral equations representing wave propagation
JP4045549B2 (en) * 2004-02-12 2008-02-13 株式会社デンソー Hydrogen concentration detection device and hydrogen concentration detection method
US7502109B2 (en) 2005-05-17 2009-03-10 Honeywell International Inc. Optical micro-spectrometer
EP1904814A1 (en) * 2005-07-21 2008-04-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Measuring device for media-independent measuring of a flow rate of a medium
US7424366B2 (en) 2005-08-27 2008-09-09 Schlumberger Technology Corporation Time-of-flight stochastic correlation measurements
US7398681B2 (en) * 2005-09-22 2008-07-15 The Regents Of The University Of California Gas sensor based on dynamic thermal conductivity and molecular velocity
GB0605683D0 (en) * 2006-03-21 2006-05-03 Servomex Group Ltd Thermal conductivity sensor
EP2030685A1 (en) * 2007-08-29 2009-03-04 Koninklijke Philips Electronics N.V. A micro-fluidic device based upon active matrix principles
EP2107350A1 (en) * 2008-04-02 2009-10-07 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Fluid flow meter using thermal tracers
US7950286B2 (en) * 2008-12-19 2011-05-31 Honeywell International Inc. Multi-range pressure sensor apparatus and method utilizing a single sense die and multiple signal paths
US10330513B2 (en) * 2009-05-27 2019-06-25 Honeywell International Inc. Multi-dynamic-range sensor
EP2341214A1 (en) * 2009-12-29 2011-07-06 Welltec A/S Thermography logging tool
US8656772B2 (en) 2010-03-22 2014-02-25 Honeywell International Inc. Flow sensor with pressure output signal
US8756990B2 (en) 2010-04-09 2014-06-24 Honeywell International Inc. Molded flow restrictor
GB2480881B (en) 2010-06-04 2012-10-24 Servomex Group Ltd Thermal fluid flow apparatus
US8418549B2 (en) 2011-01-31 2013-04-16 Honeywell International Inc. Flow sensor assembly with integral bypass channel
US8286478B2 (en) 2010-12-15 2012-10-16 Honeywell International Inc. Sensor bridge with thermally isolating apertures
RU2451295C1 (en) * 2010-12-28 2012-05-20 Общество с ограниченной ответственностью "МЭМС-РЕЗЕРВ" Heat loss anemometer and method of its making
US8356514B2 (en) 2011-01-13 2013-01-22 Honeywell International Inc. Sensor with improved thermal stability
US8695417B2 (en) 2011-01-31 2014-04-15 Honeywell International Inc. Flow sensor with enhanced flow range capability
US8446220B2 (en) 2011-05-09 2013-05-21 Honeywell International Inc. Method and apparatus for increasing the effective resolution of a sensor
US8718981B2 (en) 2011-05-09 2014-05-06 Honeywell International Inc. Modular sensor assembly including removable sensing module
US20140130591A1 (en) 2011-06-13 2014-05-15 Schlumberger Technology Corporation Methods and Apparatus for Determining Downhole Parameters
US8770034B2 (en) 2011-09-06 2014-07-08 Honeywell International Inc. Packaged sensor with multiple sensors elements
FR2995691B1 (en) * 2012-09-19 2014-10-10 Commissariat Energie Atomique THERMAL FLOW SENSOR, GAS SENSOR COMPRISING AT LEAST ONE SUCH SENSOR AND PIRANI GAUGE COMPRISING AT LEAST ONE SUCH SENSOR
DE102012019657B3 (en) * 2012-10-08 2013-10-31 Bundesrepublik Deutschland, endvertreten durch die Physikalisch-Technische Bundesanstalt A method for determining a thermal transport size and a flow velocity in a flowing medium and thermal transport size measuring arrangement
SG2012080636A (en) * 2012-10-31 2014-05-29 Eng Hwee Freddie Lee Intravenous (iv) infusion monitoring method and system
US9052217B2 (en) 2012-11-09 2015-06-09 Honeywell International Inc. Variable scale sensor
US9170136B2 (en) 2013-11-05 2015-10-27 Amphenol Thermometrics, Inc. Systems and methods for flow sensing in a conduit
US9612146B2 (en) 2014-02-07 2017-04-04 Honeywell International, Inc. Airflow sensor with dust reduction
DE102014008284A1 (en) * 2014-06-03 2015-12-03 Diehl Metering Gmbh Method for determining the volume flow of a flowing medium through a measuring section and associated measuring device
WO2015190331A1 (en) * 2014-06-09 2015-12-17 日立オートモティブシステムズ株式会社 Dynamic quantity measuring device and pressure sensor using same
DE102016205776A1 (en) * 2016-04-07 2017-10-12 Robert Bosch Gmbh Calorimetric determination of a gas concentration
EP3258060B1 (en) * 2016-06-13 2019-12-11 Services Petroliers Schlumberger Fluid component determination using thermal properties
EP3348969B1 (en) 2017-01-12 2020-11-18 Sensirion AG Measurement of a fluid parameter and sensor device therefore
EP3421947B1 (en) * 2017-06-30 2019-08-07 Sensirion AG Operation method for flow sensor device
AU2018370858B2 (en) 2017-11-22 2023-04-27 Magic Leap, Inc. Thermally actuated cantilevered beam optical scanner
EP3926335B1 (en) 2018-01-05 2022-10-26 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Evaluation assembly for a thermal gas sensor, method and computer program
DE102018006868B4 (en) 2018-08-30 2020-03-19 Diehl Metering Gmbh Measuring device for determining the thermal conductivity of a fluid
DE102018008286A1 (en) 2018-10-19 2020-04-23 Diehl Metering Gmbh Thermal gas sensor, method for measuring the thermal conductivity of a gas or gas mixture and method for measuring the thermal conductivity of a gas or gas mixture
DE102020134912A1 (en) * 2020-04-30 2021-11-04 AST (Advanced Sensor Technologies) International GmbH Sensor arrangement for a fluid, fluid tank and use of the sensor arrangement

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783356A (en) * 1965-05-06 1974-01-01 Westinghouse Electric Corp Null balance indicating and control apparatus and phase sensitive pulse responsive circuits for use therein
US4043196A (en) * 1976-02-09 1977-08-23 Technology Incorporated Method and apparatus for effecting fluid flow measurement in a single sensor
DE2934566A1 (en) * 1979-08-27 1981-03-19 Siemens AG, 1000 Berlin und 8000 München Thermal flow speed measurement - using combined heater-sensing elements at two measurement points independent of heating times
JPS56153256A (en) * 1980-04-30 1981-11-27 Natl Aerospace Lab Direct-reading current meter
JPS57131029A (en) * 1981-02-05 1982-08-13 Toshiba Corp Temperature detector
US4478076A (en) * 1982-09-30 1984-10-23 Honeywell Inc. Flow sensor
US4507974A (en) * 1983-04-21 1985-04-02 The Board Of Trustees Of The Leland Stanford Jr. University Method and apparatus for measuring flow
US4576050A (en) * 1984-08-29 1986-03-18 General Motors Corporation Thermal diffusion fluid flow sensor
US4944035A (en) * 1988-06-24 1990-07-24 Honeywell Inc. Measurement of thermal conductivity and specific heat
US5044766A (en) * 1990-08-03 1991-09-03 Calspan Corporation Method and apparatus for determining the thermal time constant of fine metal wire segments
WO1992006369A1 (en) * 1990-09-28 1992-04-16 Institut National De La Recherche Agronomique (Inra) Method for detecting status changes of a liquid or gelled medium and sensor device for implementing such method
US5146414A (en) * 1990-04-18 1992-09-08 Interflo Medical, Inc. Method and apparatus for continuously measuring volumetric flow
DE4222458A1 (en) * 1992-07-08 1994-01-13 Heinz Dipl Ing Ploechinger Thermal wave flow meter - contains geometrically defined arrangement of sensor modules, derives propagation speeds of thermal wave and fluid using defined equations
DE4243573A1 (en) * 1992-12-22 1994-06-23 Lang Apparatebau Gmbh Calorimetric flow meter
US5379630A (en) * 1993-06-28 1995-01-10 Hewlett-Packard Company Thermal conductivity detector
GB2287792A (en) * 1994-03-25 1995-09-27 John Keith Bartington Method and devices for measurement of flow speed using continuous oscillations in a thermal wave
EP0702212A2 (en) * 1994-09-13 1996-03-20 Fuji Electric Co., Ltd. Phase difference measuring apparatus and mass flowmeter thereof
US5533412A (en) * 1993-07-07 1996-07-09 Ic Sensors, Inc. Pulsed thermal flow sensor system
DE29607315U1 (en) * 1996-04-23 1996-08-14 Kaestel Walter Prof Dr Thermal flow sensor
US5587520A (en) * 1995-09-29 1996-12-24 Hewlett-Packard Company Thermal conductivity detector
EP0773432A2 (en) * 1995-11-13 1997-05-14 The Boc Group, Inc. Flowmeter and method of using the same
DE19619133A1 (en) * 1996-05-11 1997-11-13 Richard Dipl Ing Maczan Sensor for determining the thermal conductivity and / or the temperature of non-flowing, liquid or gaseous substances and method for exciting the sensor

Family Cites Families (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015232A (en) 1957-10-02 1962-01-02 Flow Measurements Corp Flow cell
US3335606A (en) 1964-06-16 1967-08-15 Edison Instr Inc Double thermistor flowmeters
JPS5245518B2 (en) * 1972-09-11 1977-11-16
US4228815A (en) 1975-06-19 1980-10-21 Bayer Aktiengesellschaft Measurement and control of multicomponent liquid systems
US4279147A (en) 1980-01-10 1981-07-21 Djorup Robert Sonny Directional heat loss anemometer transducer
JPS57206830A (en) 1981-06-12 1982-12-18 Anima Kk Heat pulse system flow meter
US4483200A (en) 1981-01-19 1984-11-20 Anima Corporation Thermal pulse flowmeter
DE3234146A1 (en) 1982-09-15 1984-03-15 Werner Prof. Dr. 2308 Preetz Kroebel Flowmeter with heat pulse marking
US4713970A (en) 1984-08-29 1987-12-22 General Motors Corporation Thermal diffusion fluid flow sensor
DE3600679A1 (en) 1986-01-13 1987-07-16 Centra Buerkle Gmbh & Co METHOD AND DEVICE FOR MEASURING FLOW RATES
US5184509A (en) 1986-05-09 1993-02-09 Robert Bosch Gmbh Method and apparatus for measuring the air flow in the air intake passage of an internal combustion engine
US4682503A (en) 1986-05-16 1987-07-28 Honeywell Inc. Microscopic size, thermal conductivity type, air or gas absolute pressure sensor
US4735082A (en) 1986-07-14 1988-04-05 Hewlett-Packard Company Pulse modulated thermal conductivity detector
US4909078A (en) 1987-10-14 1990-03-20 Rosemount Inc. Fluid flow detector
DE3803611A1 (en) 1988-02-06 1989-08-17 Bosch Gmbh Robert SWITCH-CONTROLLED FLOW PROBE
US5031126A (en) 1988-06-30 1991-07-09 Delta M Corporation Constant power thermal sensor
US4981369A (en) 1988-10-20 1991-01-01 Murata Mfg. Co., Ltd. Frost and dew sensor
DE3841637C1 (en) 1988-12-10 1990-05-10 Gebr. Schmidt Fabrik Fuer Feinmechanik, 7742 St Georgen, De
US4961348A (en) 1988-12-16 1990-10-09 Ulrich Bonne Flowmeter fluid composition correction
US5080495A (en) 1989-08-30 1992-01-14 Mitsui Toatsu Chemicals, Inc. Method and apparatus for measuring thermal diffusivity by ac joule-heating
DE3938286C2 (en) 1989-11-17 1999-11-04 Bosch Gmbh Robert Method and device for temperature control of a measuring resistor which detects the throughput of a flowing fluid mass
US5237523A (en) 1990-07-25 1993-08-17 Honeywell Inc. Flowmeter fluid composition and temperature correction
US5247156A (en) 1990-11-13 1993-09-21 Cableries Et Trefileries De Cossonay S.A. Apparatus for measuring physical properties of fluids
US5303167A (en) 1991-03-08 1994-04-12 Honeywell Inc. Absolute pressure sensor and method
US5243858A (en) 1991-08-12 1993-09-14 General Motors Corporation Fluid flow sensor with thermistor detector
US5263380A (en) 1992-02-18 1993-11-23 General Motors Corporation Differential AC anemometer
GB9305088D0 (en) 1993-03-12 1993-04-28 Wrc Plc Improvements in and relating to measurement of fluid flow velocity
US5463899A (en) 1994-08-12 1995-11-07 Gas Research Institute Simultaneous measurement of gas thermal conductivity and mass flow
JP3252641B2 (en) * 1994-09-13 2002-02-04 富士電機株式会社 Phase difference measuring device
US6019505A (en) * 1997-12-31 2000-02-01 Honeywell Inc. Time lag approach for measuring thermal conductivity and specific heat
US6079253A (en) * 1997-12-31 2000-06-27 Honeywell Inc. Method and apparatus for measuring selected properties of a fluid of interest using a single heater element

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783356A (en) * 1965-05-06 1974-01-01 Westinghouse Electric Corp Null balance indicating and control apparatus and phase sensitive pulse responsive circuits for use therein
US4043196A (en) * 1976-02-09 1977-08-23 Technology Incorporated Method and apparatus for effecting fluid flow measurement in a single sensor
DE2934566A1 (en) * 1979-08-27 1981-03-19 Siemens AG, 1000 Berlin und 8000 München Thermal flow speed measurement - using combined heater-sensing elements at two measurement points independent of heating times
JPS56153256A (en) * 1980-04-30 1981-11-27 Natl Aerospace Lab Direct-reading current meter
JPS57131029A (en) * 1981-02-05 1982-08-13 Toshiba Corp Temperature detector
US4478076A (en) * 1982-09-30 1984-10-23 Honeywell Inc. Flow sensor
US4507974A (en) * 1983-04-21 1985-04-02 The Board Of Trustees Of The Leland Stanford Jr. University Method and apparatus for measuring flow
US4576050A (en) * 1984-08-29 1986-03-18 General Motors Corporation Thermal diffusion fluid flow sensor
US4944035A (en) * 1988-06-24 1990-07-24 Honeywell Inc. Measurement of thermal conductivity and specific heat
US5146414A (en) * 1990-04-18 1992-09-08 Interflo Medical, Inc. Method and apparatus for continuously measuring volumetric flow
US5044766A (en) * 1990-08-03 1991-09-03 Calspan Corporation Method and apparatus for determining the thermal time constant of fine metal wire segments
WO1992006369A1 (en) * 1990-09-28 1992-04-16 Institut National De La Recherche Agronomique (Inra) Method for detecting status changes of a liquid or gelled medium and sensor device for implementing such method
DE4222458A1 (en) * 1992-07-08 1994-01-13 Heinz Dipl Ing Ploechinger Thermal wave flow meter - contains geometrically defined arrangement of sensor modules, derives propagation speeds of thermal wave and fluid using defined equations
DE4243573A1 (en) * 1992-12-22 1994-06-23 Lang Apparatebau Gmbh Calorimetric flow meter
US5379630A (en) * 1993-06-28 1995-01-10 Hewlett-Packard Company Thermal conductivity detector
US5533412A (en) * 1993-07-07 1996-07-09 Ic Sensors, Inc. Pulsed thermal flow sensor system
GB2287792A (en) * 1994-03-25 1995-09-27 John Keith Bartington Method and devices for measurement of flow speed using continuous oscillations in a thermal wave
EP0702212A2 (en) * 1994-09-13 1996-03-20 Fuji Electric Co., Ltd. Phase difference measuring apparatus and mass flowmeter thereof
US5587520A (en) * 1995-09-29 1996-12-24 Hewlett-Packard Company Thermal conductivity detector
EP0773432A2 (en) * 1995-11-13 1997-05-14 The Boc Group, Inc. Flowmeter and method of using the same
DE29607315U1 (en) * 1996-04-23 1996-08-14 Kaestel Walter Prof Dr Thermal flow sensor
DE19619133A1 (en) * 1996-05-11 1997-11-13 Richard Dipl Ing Maczan Sensor for determining the thermal conductivity and / or the temperature of non-flowing, liquid or gaseous substances and method for exciting the sensor

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
ATALLA S R ET AL: "Measurement of thermal properties of liquids with an AC heated-wire technique", INTERNATIONAL JOURNAL OF THERMOPHYSICS, JUNE 1981, USA, vol. 2, no. 2, ISSN 0195-928X, pages 155 - 162, XP002103528 *
ATALLA S R ET AL: "Radiation effects with the AC heated strip technique for the measurement of thermal properties of liquids", 9TH EUROPEAN CONFERENCE ON THERMOPHYSICAL PROPERTIES, MANCHESTER, UK, 17-21 SEPT. 1984, vol. 17, no. 4, ISSN 0018-1544, High Temperatures - High Pressures, 1985, UK, pages 447 - 452, XP002103529 *
PATENT ABSTRACTS OF JAPAN vol. 006, no. 034 (P - 104) 2 March 1982 (1982-03-02) *
PATENT ABSTRACTS OF JAPAN vol. 006, no. 229 (P - 155) 16 November 1982 (1982-11-16) *
WOLFGAN WEHRMANN ET AL.: "Korrelationstechnik", 1980, EXPERT VERLAG, GRAFENAU, XP002094984 *

Also Published As

Publication number Publication date
DE69830343D1 (en) 2005-06-30
CA2316916A1 (en) 1999-07-08
DE69830345T2 (en) 2006-05-04
EP1068517A2 (en) 2001-01-17
WO1999034198A2 (en) 1999-07-08
DE69814474D1 (en) 2003-06-12
DE69814474T2 (en) 2004-03-18
EP1329712A1 (en) 2003-07-23
EP1329711B1 (en) 2005-05-25
EP1329711A1 (en) 2003-07-23
ES2195426T3 (en) 2003-12-01
DE69837946T2 (en) 2008-02-28
DE69830345D1 (en) 2005-06-30
JP2002500355A (en) 2002-01-08
EP1068517B1 (en) 2003-05-07
US6169965B1 (en) 2001-01-02
DE69830343T2 (en) 2006-02-02
DE69837946D1 (en) 2007-07-26
EP1329713B1 (en) 2007-06-13
EP1329712B1 (en) 2005-05-25
EP1329713A1 (en) 2003-07-23

Similar Documents

Publication Publication Date Title
WO1999034198A3 (en) Fluid property and flow sensing via a common frequency generator and fast fourier transformation
CA2316891A1 (en) Time lag approach for measuring thermal conductivity and specific heat
WO2005050228A3 (en) Electrochemical impedance measurement system and method for use thereof
EP0895584A4 (en) Analysis of complex mixtures
AU5746399A (en) Device for determining a physical process variable of a medium
WO2005045635A3 (en) Method and apparatus to reject electrical interference in a capacitive liquid level sensor system
AU6640790A (en) Velocity measurement system
WO1999015859A3 (en) Gas flow rate measurement apparatus and method
CA2232922A1 (en) A method and apparatus for acquiring data in a hydrocarbon well
EP0791176A4 (en) Detection device and method
CA2163425A1 (en) Method and apparatus for measuring flow using frequency-dispersive techniques
WO2002004916A3 (en) Method and apparatus for determining the composition of fluids
CA2316885A1 (en) Method and apparatus for measuring selected properties of a fluid of interest using a single heater element
WO2002046792A3 (en) A method of and apparatus for processing seismic data
CA2333153A1 (en) Process control
CA2172321A1 (en) Method and Apparatus for Testing RF Devices
WO2003054481A3 (en) Method for detecting and/or monitoring a physical or chemical process variable
JPH11510255A (en) Method for detecting characteristics of liquid in pipe and method for controlling pump
WO2002088760A3 (en) Method and system for measuring the energy of a signal
AU2645397A (en) Apparatus and method for detecting fluids
AU5551600A (en) Correlation analysis in the phase domain
NO973584D0 (en) Method and apparatus for measuring and regulating steam / liquid mixture by pipe connections
FR2667160B1 (en) METHOD AND DEVICE FOR MEASURING THE INTEGRITY OF A TRANSMISSION.
FR2820820B1 (en) DEVICE FOR CALIBRATING A PRESSURE SENSOR, IN PARTICULAR AN INFRASON PRESSURE SENSOR
WO1998052286A3 (en) Swept frequency device test

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): CA JP

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): CA JP

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 1998960696

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2316916

Country of ref document: CA

Ref country code: CA

Ref document number: 2316916

Kind code of ref document: A

Format of ref document f/p: F

ENP Entry into the national phase

Ref country code: JP

Ref document number: 2000 526799

Kind code of ref document: A

Format of ref document f/p: F

WWP Wipo information: published in national office

Ref document number: 1998960696

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1998960696

Country of ref document: EP