SE0004219D0 - Flow Speedometer - Google Patents

Flow Speedometer

Info

Publication number
SE0004219D0
SE0004219D0 SE0004219A SE0004219A SE0004219D0 SE 0004219 D0 SE0004219 D0 SE 0004219D0 SE 0004219 A SE0004219 A SE 0004219A SE 0004219 A SE0004219 A SE 0004219A SE 0004219 D0 SE0004219 D0 SE 0004219D0
Authority
SE
Sweden
Prior art keywords
signals
transmitters
sound
receivers
polarities
Prior art date
Application number
SE0004219A
Other languages
Swedish (sv)
Other versions
SE0004219L (en
SE517922C2 (en
Inventor
Per-Aake Stroemberg
Original Assignee
Stroemberg Aake
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 Stroemberg Aake filed Critical Stroemberg Aake
Priority to SE0004219A priority Critical patent/SE517922C2/en
Publication of SE0004219D0 publication Critical patent/SE0004219D0/en
Priority to AU2002214518A priority patent/AU2002214518A1/en
Priority to PCT/SE2001/002541 priority patent/WO2002040948A1/en
Priority to EP01983063A priority patent/EP1342057A1/en
Publication of SE0004219L publication Critical patent/SE0004219L/en
Publication of SE517922C2 publication Critical patent/SE517922C2/en

Links

Classifications

    • 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
    • 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)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measuring Volume Flow (AREA)

Abstract

In a flow velocity meter of ultrasonic type sound signals are transmitted in a ring-around-process between two ultrasonic transmitters/detectors (G1, G2) placed opposite each other, having their transmission /receiving direction located in an angle to the flow direction (3) of a fluid. In the transmitting operation the polarities of the transmitted sound pulses are changed to that the currently active one of the transmitters/receivers is controlled to transmit the sound signals with positive and negative polarities chosen to reduce the influence of sound signals reflected by the transmitters/receivers on the direct sound signals that are received by the other one of the transmitters/receivers. The transmission of the signals is activated by a pulse transmission unit (27) so that for example each sound signal contains two pulses transmitted successively. The polarities are controlled by a multiplexer (13) that receives a control signal from a control unit (25). A polarity change is also made for received signals by means of another multiplexer (11) so that the received signals always have the same polarity. It facilitates the detection of a particular position in the received signals such as a suitably chosen zero passing using a zero point detector (21).
SE0004219A 2000-11-15 2000-11-15 Method and apparatus for determining the velocity of a fluid SE517922C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE0004219A SE517922C2 (en) 2000-11-15 2000-11-15 Method and apparatus for determining the velocity of a fluid
AU2002214518A AU2002214518A1 (en) 2000-11-15 2001-11-15 Flow velocity meter
PCT/SE2001/002541 WO2002040948A1 (en) 2000-11-15 2001-11-15 Flow velocity meter
EP01983063A EP1342057A1 (en) 2000-11-15 2001-11-15 Flow velocity meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0004219A SE517922C2 (en) 2000-11-15 2000-11-15 Method and apparatus for determining the velocity of a fluid

Publications (3)

Publication Number Publication Date
SE0004219D0 true SE0004219D0 (en) 2000-11-15
SE0004219L SE0004219L (en) 2002-05-16
SE517922C2 SE517922C2 (en) 2002-08-06

Family

ID=20281865

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0004219A SE517922C2 (en) 2000-11-15 2000-11-15 Method and apparatus for determining the velocity of a fluid

Country Status (4)

Country Link
EP (1) EP1342057A1 (en)
AU (1) AU2002214518A1 (en)
SE (1) SE517922C2 (en)
WO (1) WO2002040948A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004010291B4 (en) * 2004-03-03 2016-12-22 Robert Bosch Gmbh Ultrasonic flow sensor with multiple pulses
SE532010C2 (en) * 2007-09-24 2009-09-29 Per-Aake Stroemberg Flow rate meters working according to the sing-around principle
JP7129514B1 (en) 2021-03-24 2022-09-01 東京計装株式会社 Ultrasonic flow measurement device
CN113504389A (en) * 2021-07-27 2021-10-15 美卓伦仪表（常州）有限公司 Circuit and method for measuring ultrasonic wave propagation time

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783687A (en) * 1972-05-26 1974-01-08 Fischer & Porter Co Electromagnetic flowmeter with square-wave excitation
NZ243293A (en) * 1991-06-25 1995-03-28 Commw Scient Ind Res Org Fluid flow meter: time of travel of acoustic wave packet through fluid
NZ243294A (en) * 1991-06-25 1995-04-27 Commw Scient Ind Res Org Time of flight of acoustic wave packets through fluid: reduction of higher order acoustic mode effects
US5700952A (en) * 1995-11-28 1997-12-23 Sawtek Inc. Time domain delay measurement apparatus and associated method

Also Published As

Publication number Publication date
EP1342057A1 (en) 2003-09-10
SE0004219L (en) 2002-05-16
SE517922C2 (en) 2002-08-06
WO2002040948A1 (en) 2002-05-23
AU2002214518A1 (en) 2002-05-27

Similar Documents

Publication Publication Date Title
ES2080125T3 (en) MEASURING SYSTEM.
CA2100749A1 (en) Measurement system
KR920010025B1 (en) Speed measurement device
EP0219340A2 (en) Acoustic direction finder for use as an active responder
SE0004219D0 (en) Flow Speedometer
JP2003315123A5 (en)
JPS5836292B2 (en) ultrasonic flow meter
JPS57187664A (en) Detecting device for direction of movement of body
JPS57207864A (en) Ultrasonic current meter
JPH0431781A (en) Pulse type ultrasonic sensor
JPH07198830A (en) Received wave gain control device in measuring apparatus using ultrasonic wave
JPH0331767A (en) Ultrasonic current meter
GB1341586A (en) Ultrasonic flow-velocity meters

Legal Events

Date Code Title Description
NUG Patent has lapsed