FI921448A0 - FARING EQUIPMENT FOR ACOUSTIC MAINTENANCE AV ENTRY. - Google Patents

FARING EQUIPMENT FOR ACOUSTIC MAINTENANCE AV ENTRY.

Info

Publication number
FI921448A0
FI921448A0 FI921448A FI921448A FI921448A0 FI 921448 A0 FI921448 A0 FI 921448A0 FI 921448 A FI921448 A FI 921448A FI 921448 A FI921448 A FI 921448A FI 921448 A0 FI921448 A0 FI 921448A0
Authority
FI
Finland
Prior art keywords
acoustic
entry
maintenance
faring equipment
faring
Prior art date
Application number
FI921448A
Other languages
Finnish (fi)
Other versions
FI88208C (en
FI88208B (en
Inventor
Pekka Hiismaeki
Original Assignee
Valtion Teknillinen
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 Valtion Teknillinen filed Critical Valtion Teknillinen
Priority to FI921448A priority Critical patent/FI88208C/en
Publication of FI921448A0 publication Critical patent/FI921448A0/en
Priority to PCT/FI1992/000278 priority patent/WO1993020411A1/en
Priority to FI924880A priority patent/FI89835C/en
Application granted granted Critical
Publication of FI88208B publication Critical patent/FI88208B/en
Priority to CN 93104014 priority patent/CN1078552A/en
Publication of FI88208C publication Critical patent/FI88208C/en

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • G01P5/18—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 time taken to traverse a fixed distance
    • 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
    • G01F1/704—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
    • G01F1/7082—Measuring the time taken to traverse a fixed distance using acoustic detecting arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Measuring Volume Flow (AREA)
FI921448A 1992-04-01 1992-04-01 FARING EQUIPMENT FOR ACOUSTIC MAINTENANCE AV ENTRY FI88208C (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FI921448A FI88208C (en) 1992-04-01 1992-04-01 FARING EQUIPMENT FOR ACOUSTIC MAINTENANCE AV ENTRY
PCT/FI1992/000278 WO1993020411A1 (en) 1992-04-01 1992-10-16 Method and device for determination of the velocity of a gas flowing in a pipe
FI924880A FI89835C (en) 1992-04-01 1992-10-28 Method and apparatus for determining the velocity of a gas flowing in a pipe
CN 93104014 CN1078552A (en) 1992-04-01 1993-04-01 The assay method and the device of gas velocity in the pipe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI921448 1992-04-01
FI921448A FI88208C (en) 1992-04-01 1992-04-01 FARING EQUIPMENT FOR ACOUSTIC MAINTENANCE AV ENTRY

Publications (3)

Publication Number Publication Date
FI921448A0 true FI921448A0 (en) 1992-04-01
FI88208B FI88208B (en) 1992-12-31
FI88208C FI88208C (en) 1993-04-13

Family

ID=8535027

Family Applications (2)

Application Number Title Priority Date Filing Date
FI921448A FI88208C (en) 1992-04-01 1992-04-01 FARING EQUIPMENT FOR ACOUSTIC MAINTENANCE AV ENTRY
FI924880A FI89835C (en) 1992-04-01 1992-10-28 Method and apparatus for determining the velocity of a gas flowing in a pipe

Family Applications After (1)

Application Number Title Priority Date Filing Date
FI924880A FI89835C (en) 1992-04-01 1992-10-28 Method and apparatus for determining the velocity of a gas flowing in a pipe

Country Status (2)

Country Link
FI (2) FI88208C (en)
WO (1) WO1993020411A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI94909C (en) * 1994-04-19 1995-11-10 Valtion Teknillinen Acoustic flow measurement method and applicable device
US5531099A (en) * 1994-11-09 1996-07-02 At&T Corp. Underground conduit defect localization
NL1008827C1 (en) * 1998-04-07 1999-10-08 Nico Roosnek Method and device for measuring physical parameters.
SE0003348D0 (en) * 2000-09-18 2000-09-18 Flaekt Ab Apparatus and method for measuring the flow in a fluid
DE10062875B4 (en) * 2000-12-16 2007-02-08 Hydrometer Gmbh Flowmeter
WO2006134199A1 (en) * 2005-06-16 2006-12-21 Justiflow Oy Ultrasound flowmeter arrangement for determining speed of sound
GB0921530D0 (en) * 2009-12-09 2010-01-27 Atmos Wave Ltd Monitoring fluid flow in a conduit
JP5492606B2 (en) 2010-03-03 2014-05-14 アズビル株式会社 Arithmetic device and flow meter provided with arithmetic device
US20120173191A1 (en) * 2011-01-03 2012-07-05 Moeller Lothar B Airspeed And Velocity Of Air Measurement
CN102830245A (en) * 2012-08-15 2012-12-19 华北电力大学 Monitoring system and monitoring method for boiler furnace flue gas velocity based on acoustics
WO2020183719A1 (en) * 2019-03-14 2020-09-17 オムロン株式会社 Flow rate measurement device
CN116929476B (en) * 2023-06-29 2024-06-28 华能(广东)能源开发有限公司汕头电厂 Soot blowing air inflow detection method and system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445389A (en) * 1981-09-10 1984-05-01 The United States Of America As Represented By The Secretary Of Commerce Long wavelength acoustic flowmeter
FI76885C (en) * 1987-01-16 1988-12-12 Valtion Teknillinen Acoustic flow measurement method and device for application thereof.
FI87493C (en) * 1991-12-23 1993-01-11 Kytoelae Instrumenttitehdas OVER ANCHORING FOR OVER MAINTENANCE AV STROEMNINGSHASTIGHETEN AV GASER OCH / ELLER STORHETER SOM KAN HAERLEDAS FRAON DENNA

Also Published As

Publication number Publication date
FI924880A0 (en) 1992-10-28
FI88208C (en) 1993-04-13
FI89835C (en) 1993-11-25
FI88208B (en) 1992-12-31
FI89835B (en) 1993-08-13
WO1993020411A1 (en) 1993-10-14

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Legal Events

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