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DK201883A - Langboelget akustisk flowmeter - Google Patents

Langboelget akustisk flowmeter Download PDF

Info

Publication number
DK201883A
DK201883A DK201883A DK201883A DK201883A DK 201883 A DK201883 A DK 201883A DK 201883 A DK201883 A DK 201883A DK 201883 A DK201883 A DK 201883A DK 201883 A DK201883 A DK 201883A
Authority
DK
Denmark
Prior art keywords
long
wave acoustic
acoustic flowmeter
flowmeter
wave
Prior art date
Application number
DK201883A
Other languages
English (en)
Other versions
DK201883D0 (da
Inventor
James E Potzick
Baldwin Robertson
Original Assignee
Usa
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 Usa filed Critical Usa
Publication of DK201883D0 publication Critical patent/DK201883D0/da
Publication of DK201883A publication Critical patent/DK201883A/da

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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
DK201883A 1981-09-10 1983-05-05 Langboelget akustisk flowmeter DK201883A (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/300,830 US4445389A (en) 1981-09-10 1981-09-10 Long wavelength acoustic flowmeter
PCT/US1982/001227 WO1983000922A1 (en) 1981-09-10 1982-09-10 Long wavelength acoustic flowmeter

Publications (2)

Publication Number Publication Date
DK201883D0 DK201883D0 (da) 1983-05-05
DK201883A true DK201883A (da) 1983-05-05

Family

ID=23160772

Family Applications (1)

Application Number Title Priority Date Filing Date
DK201883A DK201883A (da) 1981-09-10 1983-05-05 Langboelget akustisk flowmeter

Country Status (5)

Country Link
US (1) US4445389A (da)
EP (1) EP0077285A3 (da)
JP (1) JPS58501442A (da)
DK (1) DK201883A (da)
WO (1) WO1983000922A1 (da)

Families Citing this family (122)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4628725A (en) * 1985-03-29 1986-12-16 Schlumberger Technology Corporation Apparatus and method for analyzing a fluid that includes a liquid phase, contained in a tubular conduit
US4712060A (en) * 1986-08-29 1987-12-08 Board Of Regents The University Of Texas System Sampling average phase meter
US4896540A (en) * 1988-04-08 1990-01-30 Parthasarathy Shakkottai Aeroacoustic flowmeter
JPH0778438B2 (ja) * 1988-07-08 1995-08-23 エンドレス ウント ハウザー フローテック アクチエンゲゼルシヤフト 超音波流量測定方法及び装置
US4934196A (en) * 1989-06-02 1990-06-19 Micro Motion, Inc. Coriolis mass flow rate meter having a substantially increased noise immunity
US4996871A (en) * 1989-06-02 1991-03-05 Micro Motion, Inc. Coriolis densimeter having substantially increased noise immunity
FI88208C (fi) * 1992-04-01 1993-04-13 Valtion Teknillinen Foerfarande och anordning foer akustisk maetning av en gasstroem
FI88209C (fi) * 1992-04-14 1993-04-13 Kytoelae Instrumenttitehdas Foerfarande och anordning vid akustisk stroemmaetning foer att foersaekra sig om den funktionsfoermaoga
US5460047A (en) * 1992-11-13 1995-10-24 Panametrics, Inc. Flow measurement system including ultrasonic transducers
CN1058335C (zh) * 1993-03-09 2000-11-08 联邦科学及工业研究组织 流体流量测量系统
FI94909C (fi) * 1994-04-19 1995-11-10 Valtion Teknillinen Akustinen virtausmittausmenetelmä ja sitä soveltava laite
US5622053A (en) * 1994-09-30 1997-04-22 Cooper Cameron Corporation Turbocharged natural gas engine control system
US5712805A (en) * 1995-11-03 1998-01-27 Wayne State University Noise diagnostic system
US6386018B1 (en) * 1996-03-11 2002-05-14 Daniel Industries, Inc. Ultrasonic 2-phase flow apparatus and stratified level detector
US6384738B1 (en) 1997-04-07 2002-05-07 Halliburton Energy Services, Inc. Pressure impulse telemetry apparatus and method
US6388577B1 (en) * 1997-04-07 2002-05-14 Kenneth J. Carstensen High impact communication and control system
DE19722274A1 (de) * 1997-05-28 1998-12-03 Degussa Verfahren zur Messung von Dichte und Massenstrom
GB9809375D0 (en) * 1998-05-02 1998-07-01 British Gas Plc Fluid temperature measurement
GB2336910B (en) * 1998-05-02 2002-07-31 British Gas Plc Fluid temperature measurement
US6354147B1 (en) 1998-06-26 2002-03-12 Cidra Corporation Fluid parameter measurement in pipes using acoustic pressures
CN1192213C (zh) * 1998-06-26 2005-03-09 塞德拉公司 利用声压测量管道中的流体参数的装置和方法
JP3569799B2 (ja) * 1998-12-17 2004-09-29 株式会社泉技研 超音波流量計
US6463813B1 (en) 1999-06-25 2002-10-15 Weatherford/Lamb, Inc. Displacement based pressure sensor measuring unsteady pressure in a pipe
US6435030B1 (en) 1999-06-25 2002-08-20 Weatherford/Lamb, Inc. Measurement of propagating acoustic waves in compliant pipes
US6691584B2 (en) 1999-07-02 2004-02-17 Weatherford/Lamb, Inc. Flow rate measurement using unsteady pressures
US6536291B1 (en) 1999-07-02 2003-03-25 Weatherford/Lamb, Inc. Optical flow rate measurement using unsteady pressures
US6813962B2 (en) * 2000-03-07 2004-11-09 Weatherford/Lamb, Inc. Distributed sound speed measurements for multiphase flow measurement
US6601458B1 (en) 2000-03-07 2003-08-05 Weatherford/Lamb, Inc. Distributed sound speed measurements for multiphase flow measurement
DE10012926C2 (de) * 2000-03-16 2002-01-31 Daimler Chrysler Ag Sensoreinrichtung zur Strömungsmessung, Vorrichtung zur Durchströmung mit einem Medium und Verfahren zur Bestimmung von Strömungsparametern
US9772311B2 (en) 2000-07-14 2017-09-26 Acosense Ab Active acoustic method for predicting properties of process fluids comprising solid particles or gas/liquid volumes based on their size distribution and concentration
SE516979C2 (sv) * 2000-07-14 2002-03-26 Abb Ab Aktiv akustisk spektroskopi
US6550342B2 (en) 2000-11-29 2003-04-22 Weatherford/Lamb, Inc. Circumferential strain attenuator
US6785004B2 (en) * 2000-11-29 2004-08-31 Weatherford/Lamb, Inc. Method and apparatus for interrogating fiber optic sensors
US6782150B2 (en) * 2000-11-29 2004-08-24 Weatherford/Lamb, Inc. Apparatus for sensing fluid in a pipe
US6558036B2 (en) 2000-11-29 2003-05-06 Weatherford/Lamb, Inc. Non-intrusive temperature sensor for measuring internal temperature of fluids within pipes
US6501067B2 (en) 2000-11-29 2002-12-31 Weatherford/Lamb, Inc. Isolation pad for protecting sensing devices on the outside of a conduit
US6443226B1 (en) 2000-11-29 2002-09-03 Weatherford/Lamb, Inc. Apparatus for protecting sensors within a well environment
US6898541B2 (en) * 2000-12-04 2005-05-24 Weatherford/Lamb, Inc. Method and apparatus for determining component flow rates for a multiphase flow
US7059172B2 (en) * 2001-11-07 2006-06-13 Weatherford/Lamb, Inc. Phase flow measurement in pipes using a density meter
US6698297B2 (en) 2002-06-28 2004-03-02 Weatherford/Lamb, Inc. Venturi augmented flow meter
US6971259B2 (en) * 2001-11-07 2005-12-06 Weatherford/Lamb, Inc. Fluid density measurement in pipes using acoustic pressures
US7213445B2 (en) * 2001-12-05 2007-05-08 Wayne State University Acoustic particulates density sensor
US7275421B2 (en) * 2002-01-23 2007-10-02 Cidra Corporation Apparatus and method for measuring parameters of a mixture having solid particles suspended in a fluid flowing in a pipe
US7328624B2 (en) * 2002-01-23 2008-02-12 Cidra Corporation Probe for measuring parameters of a flowing fluid and/or multiphase mixture
US7032432B2 (en) * 2002-01-23 2006-04-25 Cidra Corporation Apparatus and method for measuring parameters of a mixture having liquid droplets suspended in a vapor flowing in a pipe
US7359803B2 (en) * 2002-01-23 2008-04-15 Cidra Corporation Apparatus and method for measuring parameters of a mixture having solid particles suspended in a fluid flowing in a pipe
WO2004015377A2 (en) * 2002-08-08 2004-02-19 Cidra Corporation Apparatus and method for measuring multi-phase flows in pulp and paper industry applications
CA2513094C (en) * 2002-11-12 2013-08-06 Mark R. Fernald An apparatus having an array of clamp on piezoelectric film sensors for measuring parameters of a process flow within a pipe
US7165464B2 (en) * 2002-11-15 2007-01-23 Cidra Corporation Apparatus and method for providing a flow measurement compensated for entrained gas
US7139667B2 (en) * 2002-11-22 2006-11-21 Cidra Corporation Method for calibrating a volumetric flow meter having an array of sensors
DE602004029008D1 (de) * 2003-01-13 2010-10-21 Expro Meters Inc Apparat und verfahren zur bestimmung der geschwindigkeit eines fluids in einer leitung unter verwendung von ultraschallsensoren
US7096719B2 (en) * 2003-01-13 2006-08-29 Cidra Corporation Apparatus for measuring parameters of a flowing multiphase mixture
WO2004065914A2 (en) * 2003-01-21 2004-08-05 Cidra Corporation Measurement of entrained and dissolved gases in process flow lines
US20060048583A1 (en) * 2004-08-16 2006-03-09 Gysling Daniel L Total gas meter using speed of sound and velocity measurements
US7343818B2 (en) * 2003-01-21 2008-03-18 Cidra Corporation Apparatus and method of measuring gas volume fraction of a fluid flowing within a pipe
US7058549B2 (en) * 2003-01-21 2006-06-06 C1Dra Corporation Apparatus and method for measuring unsteady pressures within a large diameter pipe
EP1590637B1 (en) * 2003-01-21 2008-11-05 Expro Meters, Inc. An apparatus and method of measuring gas volume fraction of a fluid flowing within a pipe
WO2004079306A1 (en) 2003-03-04 2004-09-16 Cidra Corporation An apparatus having a multi-band sensor assembly for measuring a parameter of a fluid flow flowing within a pipe
US6986276B2 (en) 2003-03-07 2006-01-17 Weatherford/Lamb, Inc. Deployable mandrel for downhole measurements
US6837098B2 (en) 2003-03-19 2005-01-04 Weatherford/Lamb, Inc. Sand monitoring within wells using acoustic arrays
WO2004109239A2 (en) * 2003-06-05 2004-12-16 Cidra Corporation Apparatus for measuring velocity and flow rate of a fluid having a non-negligible axial mach number using an array of sensors
US7121152B2 (en) * 2003-06-06 2006-10-17 Cidra Corporation Portable flow measurement apparatus having an array of sensors
US7245385B2 (en) * 2003-06-24 2007-07-17 Cidra Corporation Characterizing unsteady pressures in pipes using optical measurement devices
US7197938B2 (en) * 2003-06-24 2007-04-03 Cidra Corporation Contact-based transducers for characterizing unsteady pressures in pipes
US20050050956A1 (en) * 2003-06-24 2005-03-10 Gysling Daniel L. Contact-based transducers for characterizing unsteady pressures in pipes
CA2530601C (en) * 2003-06-24 2013-06-04 Daniel L. Gysling System of distributed configurable flowmeters
WO2005054789A1 (en) * 2003-07-08 2005-06-16 Cidra Corporation Method and apparatus for measuring characteristics of core-annular flow
US7134320B2 (en) * 2003-07-15 2006-11-14 Cidra Corporation Apparatus and method for providing a density measurement augmented for entrained gas
DE602004017739D1 (de) * 2003-07-15 2008-12-24 Expro Meters Inc Apparat und verfahren zur kompensation eines coriolis-durchflussmessers
US7299705B2 (en) * 2003-07-15 2007-11-27 Cidra Corporation Apparatus and method for augmenting a Coriolis meter
CA2532577C (en) * 2003-07-15 2013-01-08 Cidra Corporation A configurable multi-function flow measurement apparatus having an array of sensors
CA2532468C (en) 2003-07-15 2013-04-23 Cidra Corporation A dual function flow measurement apparatus having an array of sensors
WO2005012844A1 (en) * 2003-08-01 2005-02-10 Cidra Corporation Method and apparatus for measuring a parameter of a high temperature fluid flowing within a pipe using an array of piezoelectric based flow sensors
US7253742B2 (en) 2003-08-01 2007-08-07 Cidra Corporation Method and apparatus for measuring parameters of a fluid flowing within a pipe using a configurable array of sensors
US7882750B2 (en) * 2003-08-01 2011-02-08 Cidra Corporate Services, Inc. Method and apparatus for measuring parameters of a fluid flowing within a pipe using a configurable array of sensors
WO2005015135A2 (en) * 2003-08-08 2005-02-17 Cidra Corporation Piezocable based sensor for measuring unsteady pressures inside a pipe
US6910388B2 (en) * 2003-08-22 2005-06-28 Weatherford/Lamb, Inc. Flow meter using an expanded tube section and sensitive differential pressure measurement
US20080264182A1 (en) * 2003-08-22 2008-10-30 Jones Richard T Flow meter using sensitive differential pressure measurement
US7110893B2 (en) * 2003-10-09 2006-09-19 Cidra Corporation Method and apparatus for measuring a parameter of a fluid flowing within a pipe using an array of sensors
US7237440B2 (en) * 2003-10-10 2007-07-03 Cidra Corporation Flow measurement apparatus having strain-based sensors and ultrasonic sensors
US7171315B2 (en) * 2003-11-25 2007-01-30 Cidra Corporation Method and apparatus for measuring a parameter of a fluid flowing within a pipe using sub-array processing
WO2005059479A1 (en) * 2003-12-11 2005-06-30 Cidra Corporation Method and apparatus for determining a quality metric of a measurement of a fluid parameter
AU2005220972B2 (en) * 2004-03-10 2010-12-23 Cidra Corporate Services, Inc. Method and apparatus for measuring parameters of a stratified flow
US7330797B2 (en) * 2004-03-10 2008-02-12 Cidra Corporation Apparatus and method for measuring settlement of solids in a multiphase flow
US7367239B2 (en) * 2004-03-23 2008-05-06 Cidra Corporation Piezocable based sensor for measuring unsteady pressures inside a pipe
US7426852B1 (en) 2004-04-26 2008-09-23 Expro Meters, Inc. Submersible meter for measuring a parameter of gas hold-up of a fluid
ATE528623T1 (de) * 2004-05-17 2011-10-15 Expro Meters Inc Vorrichtung und verfahren zum messen der zusammensetzung einer in einem rohr fliessenden mischung
US7480056B2 (en) * 2004-06-04 2009-01-20 Optoplan As Multi-pulse heterodyne sub-carrier interrogation of interferometric sensors
US7109471B2 (en) * 2004-06-04 2006-09-19 Weatherford/Lamb, Inc. Optical wavelength determination using multiple measurable features
US7380438B2 (en) 2004-09-16 2008-06-03 Cidra Corporation Apparatus and method for providing a fluid cut measurement of a multi-liquid mixture compensated for entrained gas
US7389687B2 (en) * 2004-11-05 2008-06-24 Cidra Corporation System for measuring a parameter of an aerated multi-phase mixture flowing in a pipe
US7561203B2 (en) * 2005-01-10 2009-07-14 Nokia Corporation User input device
US7404671B2 (en) * 2005-03-10 2008-07-29 Luna Innovations Incorporated Dynamic acoustic thermometer
US7962293B2 (en) * 2005-03-10 2011-06-14 Expro Meters, Inc. Apparatus and method for providing a stratification metric of a multiphase fluid flowing within a pipe
WO2010120258A2 (en) * 2005-03-17 2010-10-21 Cidra Corporation An apparatus and method of processing data to improve the performance of a flow monitoring system
CA2547125C (en) * 2005-05-16 2015-11-24 Cidra Corporation Method and apparatus for detecting and characterizing particles in a multiphase fluid
US7526966B2 (en) * 2005-05-27 2009-05-05 Expro Meters, Inc. Apparatus and method for measuring a parameter of a multiphase flow
MX2007014705A (es) * 2005-05-27 2008-02-15 Cidra Corp Un aparato y metodo para medir un parametro de un flujo de fases multiples.
US7249525B1 (en) 2005-06-22 2007-07-31 Cidra Corporation Apparatus for measuring parameters of a fluid in a lined pipe
US7418877B2 (en) * 2005-07-07 2008-09-02 Expro Meters, Inc. Wet gas metering using a differential pressure based flow meter with a sonar based flow meter
US7603916B2 (en) * 2005-07-07 2009-10-20 Expro Meters, Inc. Wet gas metering using a differential pressure and a sonar based flow meter
US7503227B2 (en) * 2005-07-13 2009-03-17 Cidra Corporate Services, Inc Method and apparatus for measuring parameters of a fluid flow using an array of sensors
US20070055464A1 (en) * 2005-08-17 2007-03-08 Gysling Daniel L System and method for providing a compositional measurement of a mixture having entrained gas
US7503217B2 (en) * 2006-01-27 2009-03-17 Weatherford/Lamb, Inc. Sonar sand detection
US20070180418A1 (en) * 2006-01-30 2007-08-02 Fam Fook T Clock scheme for circuit arrangement
US7454981B2 (en) * 2006-05-16 2008-11-25 Expro Meters. Inc. Apparatus and method for determining a parameter in a wet gas flow
US7624650B2 (en) 2006-07-27 2009-12-01 Expro Meters, Inc. Apparatus and method for attenuating acoustic waves propagating within a pipe wall
US7624651B2 (en) * 2006-10-30 2009-12-01 Expro Meters, Inc. Apparatus and method for attenuating acoustic waves in pipe walls for clamp-on ultrasonic flow meter
US7673526B2 (en) * 2006-11-01 2010-03-09 Expro Meters, Inc. Apparatus and method of lensing an ultrasonic beam for an ultrasonic flow meter
NO345532B1 (no) 2006-11-09 2021-03-29 Expro Meters Inc Apparat og fremgangsmåte for måling av en fluidstrømparameter innenfor en intern passasje i et langstrakt legme
GB2447691B (en) * 2007-03-23 2009-10-28 Schlumberger Holdings Flow measuring apparatus and method
US7753165B2 (en) * 2007-12-21 2010-07-13 Robert Bosch Gmbh Device and method for active noise cancellation in exhaust gas channel of a combustion engine
JP5682156B2 (ja) * 2010-06-24 2015-03-11 パナソニックＩｐマネジメント株式会社 超音波式流量計測装置
AT509641B1 (de) 2011-06-24 2012-08-15 Avl List Gmbh Verfahren zur ermittlung des durchflusses von fluiden nach dem ultraschalllaufzeitverfahren
TWI517079B (zh) 2013-07-30 2016-01-11 財團法人工業技術研究院 電器辨識裝置、方法及其系統
US9410422B2 (en) 2013-09-13 2016-08-09 Chevron U.S.A. Inc. Alternative gauging system for production well testing and related methods
EP2853871B1 (en) 2013-09-27 2016-03-30 Alstom Technology Ltd Method for determining the temperature inside a combustor
US9746360B2 (en) 2014-03-13 2017-08-29 Siemens Energy, Inc. Nonintrusive performance measurement of a gas turbine engine in real time
US9752959B2 (en) * 2014-03-13 2017-09-05 Siemens Energy, Inc. Nonintrusive transceiver and method for characterizing temperature and velocity fields in a gas turbine combustor
US10126266B2 (en) 2014-12-29 2018-11-13 Concentric Meter Corporation Fluid parameter sensor and meter
WO2016109451A1 (en) 2014-12-29 2016-07-07 Concentric Meter Corporation Electromagnetic transducer
WO2016109447A1 (en) 2014-12-29 2016-07-07 Concentric Meter Corporation Fluid parameter sensor and meter

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1881543A (en) * 1929-02-27 1932-10-11 Henry E Hartig Fluid meter
US2515221A (en) * 1948-01-22 1950-07-18 Eugene S Henning Cathode-ray phase measuring device
US2949773A (en) * 1955-01-20 1960-08-23 Raytheon Co Measurement of relative velocity between fluid and solid bodies
US2758663A (en) * 1955-03-21 1956-08-14 Benjamin L Snavely Sound velocity measuring system
US3007339A (en) * 1957-05-16 1961-11-07 Raytheon Co Acoustic flow meters
US3145564A (en) * 1962-02-12 1964-08-25 Foster M Poole System for measuring characteristics of fluids
US3238450A (en) * 1962-10-22 1966-03-01 Sperry Rand Corp Signal amplitude and phase synthesizing apparatus
US4003252A (en) * 1974-08-16 1977-01-18 The Institutes Of Medical Sciences Acoustical wave flowmeter
US4011755A (en) * 1975-10-23 1977-03-15 Panametrics, Inc. Acoustic flowmeter
US4164865A (en) * 1977-02-22 1979-08-21 The Perkin-Elmer Corporation Acoustical wave flowmeter
DE3046254A1 (de) * 1980-12-08 1982-07-15 Siemens AG, 1000 Berlin und 8000 München Ultraschallstroemungsmesser

Also Published As

Publication number Publication date
JPS58501442A (ja) 1983-08-25
EP0077285A2 (en) 1983-04-20
US4445389A (en) 1984-05-01
DK201883D0 (da) 1983-05-05
WO1983000922A1 (en) 1983-03-17
EP0077285A3 (en) 1984-09-19

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