GB2017914A - Improvements in or relating to ultrasonic flowmeters - Google Patents

Improvements in or relating to ultrasonic flowmeters

Info

Publication number
GB2017914A
GB2017914A GB7909513A GB7909513A GB2017914A GB 2017914 A GB2017914 A GB 2017914A GB 7909513 A GB7909513 A GB 7909513A GB 7909513 A GB7909513 A GB 7909513A GB 2017914 A GB2017914 A GB 2017914A
Authority
GB
United Kingdom
Prior art keywords
transducers
detector
fluid medium
transducer
conduit
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.)
Granted
Application number
GB7909513A
Other versions
GB2017914B (en
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.)
Flowmetering Instruments Ltd
Original Assignee
Flowmetering Instruments 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 Flowmetering Instruments Ltd filed Critical Flowmetering Instruments Ltd
Priority to GB7909513A priority Critical patent/GB2017914B/en
Publication of GB2017914A publication Critical patent/GB2017914A/en
Application granted granted Critical
Publication of GB2017914B publication Critical patent/GB2017914B/en
Expired legal-status Critical Current

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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
    • G01P5/245—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
    • G01P5/247—Sing-around-systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/14—Systems for determining distance or velocity not using reflection or reradiation using ultrasonic, sonic, or infrasonic waves

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measuring Volume Flow (AREA)

Abstract

An ultrasonic flowmeter comprises first and second electroacoustic transducers 13, 14 of the same type spaced apart on opposite sides of a conduit 10 for carrying the fluid medium, the transducers confronting one another along an axis which is inclined to the axis of the conduit so as to have a component parallel to the flow path of the fluid medium. An electrical current source 33 supplies an input signal to one transducer and a voltage detector 35 measures the relative phase of the output voltage from the other transducer. Switch means 32 are provided to interchange periodically the connections between the transducers and the signal source and detector, so that, in accordance with the electroacoustic reciprocity theorem, the outputs from the detector in the two states of the switch means will be the same when the fluid medium is stationary, and any difference in the outputs will be solely dependent on the rate of fluid flow. In a second embodiment, Figure 4 (not shown), a sing around mode is used to determine the difference in transit times in the two directions. <IMAGE>
GB7909513A 1978-03-29 1979-03-19 Ultrasonic flowmeters Expired GB2017914B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7909513A GB2017914B (en) 1978-03-29 1979-03-19 Ultrasonic flowmeters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1215078 1978-03-29
GB7909513A GB2017914B (en) 1978-03-29 1979-03-19 Ultrasonic flowmeters

Publications (2)

Publication Number Publication Date
GB2017914A true GB2017914A (en) 1979-10-10
GB2017914B GB2017914B (en) 1982-08-25

Family

ID=26248824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7909513A Expired GB2017914B (en) 1978-03-29 1979-03-19 Ultrasonic flowmeters

Country Status (1)

Country Link
GB (1) GB2017914B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002723A1 (en) * 1984-10-23 1986-05-09 N.V. Nederlandsche Apparatenfabriek Nedap Transducer with reduced acoustic reflection
GB2197472A (en) * 1986-11-17 1988-05-18 British Gas Plc Ultrasonic flowmeter
EP1345012A2 (en) * 2002-03-15 2003-09-17 Matsushita Electric Industrial Co., Ltd. Flow meter
GB2472087A (en) * 2009-07-24 2011-01-26 Wayne Rudd Apparatus and methods for determining flow characteristics of a medium
EP2383550A1 (en) 2010-04-28 2011-11-02 Miitors ApS Ultrasonic flow meter
EP2581715A1 (en) 2011-10-13 2013-04-17 Miitors ApS Ultrasonic flow meter

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002723A1 (en) * 1984-10-23 1986-05-09 N.V. Nederlandsche Apparatenfabriek Nedap Transducer with reduced acoustic reflection
GB2197472A (en) * 1986-11-17 1988-05-18 British Gas Plc Ultrasonic flowmeter
EP1345012A2 (en) * 2002-03-15 2003-09-17 Matsushita Electric Industrial Co., Ltd. Flow meter
EP1345012A3 (en) * 2002-03-15 2005-05-04 Matsushita Electric Industrial Co., Ltd. Flow meter
KR100776111B1 (en) 2002-03-15 2007-11-16 마츠시타 덴끼 산교 가부시키가이샤 Flow meter
GB2472087A (en) * 2009-07-24 2011-01-26 Wayne Rudd Apparatus and methods for determining flow characteristics of a medium
US10605646B2 (en) 2010-04-28 2020-03-31 Apator Miitors Aps Ultrasonic flow meter with subsampling of ultrasonic transducer signals
WO2011134470A2 (en) 2010-04-28 2011-11-03 Miitors Aps Ultrasonic flow meter
US9383239B2 (en) 2010-04-28 2016-07-05 Apator Miitors Aps Ultrasonic flow meter with subsampling of ultrasonic transducer signals
EP2383550A1 (en) 2010-04-28 2011-11-02 Miitors ApS Ultrasonic flow meter
EP3842767A1 (en) 2010-04-28 2021-06-30 Apator Miitors ApS Ultrasonic flow meter
US11243109B2 (en) 2010-04-28 2022-02-08 Apator Miitors Aps Ultrasonic flow meter with subsampling of ultrasonic transducer signals
EP4296630A2 (en) 2010-04-28 2023-12-27 Apator Miitors ApS Ultrasonic flow meter
EP2581715A1 (en) 2011-10-13 2013-04-17 Miitors ApS Ultrasonic flow meter
WO2013053360A2 (en) 2011-10-13 2013-04-18 Miitors Aps Ultrasonic flow meter
US10416012B2 (en) 2011-10-13 2019-09-17 Apator Miitors Aps Ultrasonic flow meter
US10775212B2 (en) 2011-10-13 2020-09-15 Apator Miitors Aps Ultrasonic flow meter
EP4414669A2 (en) 2011-10-13 2024-08-14 Apator Miitors ApS Ultrasonic flow meter

Also Published As

Publication number Publication date
GB2017914B (en) 1982-08-25

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)