WO1995028619A1 - Acoustic flow measurement method and measurement apparatus implementing the method - Google Patents
Acoustic flow measurement method and measurement apparatus implementing the method Download PDFInfo
- Publication number
- WO1995028619A1 WO1995028619A1 PCT/FI1995/000168 FI9500168W WO9528619A1 WO 1995028619 A1 WO1995028619 A1 WO 1995028619A1 FI 9500168 W FI9500168 W FI 9500168W WO 9528619 A1 WO9528619 A1 WO 9528619A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measurement
- acoustic
- pipe section
- transducers
- measurement pipe
- Prior art date
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
-
- 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
- G01F1/662—Constructional details
-
- 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
- G01F1/668—Compensating or correcting for variations in velocity of sound
-
- 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
Definitions
- phase velocities of fundamental-mode wavefronts are independent from the flow profile over the pipe cross section, which makes it possible to accomplish fluid velocity and/or volumetric measurements with a high accuracy [cf. B. Robertson, "Effect of arbitrary temperature and flow profiles on the speed of sound in a pipe”, J. Acoust. Soc. Am., Vol. 62, No. 4, pp. 813-818, October 1977, and B. Robertson, "Flow and temperature profile independence of flow measurements using long acoustic waves", Transactions of the ASME, Vol. 106, pp. 18-20, March 1984].
- Accurate methods based on the above-described principle for the measurement of the phase velocities of the downstream and upstream fundamental modes have been disclosed in the art.
- the remaining signal will be subjected to filtering by a comb filter accomplishing the elimination of spectral components at certain bandstop frequencies of constant frequency spacing, while the spectral components falling between these bandstop frequencies will be amplified.
- a characterizing property of the invention is that the filtering procedure achieves high precision only when both the downstream and upstream acoustic wavefront propagation times are known exactly, which requirement is met by an iterative solution. Hence, the parameters of the direction-discriminating filters must be corrected as more accurate values are iterated for wavefront propagation times, and therefore, the filters are locked to follow the changes in the fluid flow velocity.
- a measurement pipe section 1 is shown with a horizontal coordinate axis x parallel to the direction of the measured flow having the origin of the axis aligned to the midpoint of the pipe section 1.
- To the measurement pipe section 1 are mounted four acoustic transducers 11,12,13,14, of which transducer 11 is at point -a-b, transducer 12 at point -a+b, transducer 13 at point a-b, and transducer 14 at point a+b.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002188145A CA2188145C (en) | 1994-04-19 | 1995-03-29 | Acoustic flow measurement method and measurement apparatus implementing the method |
US08/727,499 US5770806A (en) | 1994-04-19 | 1995-03-29 | Acoustic flow measurement method and measurement apparatus implementing the method |
DE69530764T DE69530764T2 (en) | 1994-04-19 | 1995-03-29 | METHOD AND DEVICE FOR ACOUSTIC FLOW MEASUREMENT |
AT95914364T ATE240505T1 (en) | 1994-04-19 | 1995-03-29 | METHOD AND DEVICE FOR ACOUSTIC FLOW MEASUREMENT |
EP95914364A EP0756697B1 (en) | 1994-04-19 | 1995-03-29 | Acoustic flow measurement method and measurement apparatus implementing the method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI941805 | 1994-04-19 | ||
FI941805A FI94909C (en) | 1994-04-19 | 1994-04-19 | Acoustic flow measurement method and applicable device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995028619A1 true WO1995028619A1 (en) | 1995-10-26 |
Family
ID=8540553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1995/000168 WO1995028619A1 (en) | 1994-04-19 | 1995-03-29 | Acoustic flow measurement method and measurement apparatus implementing the method |
Country Status (7)
Country | Link |
---|---|
US (1) | US5770806A (en) |
EP (1) | EP0756697B1 (en) |
AT (1) | ATE240505T1 (en) |
CA (1) | CA2188145C (en) |
DE (1) | DE69530764T2 (en) |
FI (1) | FI94909C (en) |
WO (1) | WO1995028619A1 (en) |
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US6579751B2 (en) * | 1999-09-01 | 2003-06-17 | Micron Technology, Inc. | Semiconductor processing methods of forming integrated circuitry |
US6587798B2 (en) * | 2000-12-04 | 2003-07-01 | Weatherford/Lamb, Inc. | Method and system for determining the speed of sound in a fluid within a conduit |
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JP5628186B2 (en) | 2008-10-30 | 2014-11-19 | フレセニウス メディカル ケア ホールディングス インコーポレーテッド | Modular portable dialysis system |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011755A (en) * | 1975-10-23 | 1977-03-15 | Panametrics, Inc. | Acoustic flowmeter |
WO1993013414A1 (en) * | 1991-12-23 | 1993-07-08 | Instrumenttitehdas Kytölä OY | Method and device for monitoring of a gas flow, in particular of a natural-gas flow |
WO1993013390A1 (en) * | 1991-12-23 | 1993-07-08 | Instrumenttitehdas Kytölä OY | Method and device for measurement of the flow velocities of gases and/or of quantities that can be derived from same |
WO1993020411A1 (en) * | 1992-04-01 | 1993-10-14 | Valtion Teknillinen Tutkimuskeskus | Method and device for determination of the velocity of a gas flowing in a pipe |
Family Cites Families (6)
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 |
NL8602690A (en) * | 1986-10-27 | 1988-05-16 | Servex Bv | DEVICE FOR DETERMINING THE FLOW RATE OF A MEDIUM IN A CYLINDRICAL PIPE. |
US5152174A (en) * | 1990-09-24 | 1992-10-06 | Labudde Edward V | Mass flow rate sensor and method |
US5437194A (en) * | 1991-03-18 | 1995-08-01 | Panametrics, Inc. | Ultrasonic transducer system with temporal crosstalk isolation |
US5228347A (en) * | 1991-10-18 | 1993-07-20 | Ore International, Inc. | Method and apparatus for measuring flow by using phase advance |
FI88209C (en) * | 1992-04-14 | 1993-04-13 | Kytoelae Instrumenttitehdas | Method and apparatus for acoustic current measurement to assure the performance |
-
1994
- 1994-04-19 FI FI941805A patent/FI94909C/en not_active IP Right Cessation
-
1995
- 1995-03-29 DE DE69530764T patent/DE69530764T2/en not_active Expired - Lifetime
- 1995-03-29 US US08/727,499 patent/US5770806A/en not_active Expired - Lifetime
- 1995-03-29 EP EP95914364A patent/EP0756697B1/en not_active Expired - Lifetime
- 1995-03-29 AT AT95914364T patent/ATE240505T1/en not_active IP Right Cessation
- 1995-03-29 WO PCT/FI1995/000168 patent/WO1995028619A1/en active IP Right Grant
- 1995-03-29 CA CA002188145A patent/CA2188145C/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011755A (en) * | 1975-10-23 | 1977-03-15 | Panametrics, Inc. | Acoustic flowmeter |
WO1993013414A1 (en) * | 1991-12-23 | 1993-07-08 | Instrumenttitehdas Kytölä OY | Method and device for monitoring of a gas flow, in particular of a natural-gas flow |
WO1993013390A1 (en) * | 1991-12-23 | 1993-07-08 | Instrumenttitehdas Kytölä OY | Method and device for measurement of the flow velocities of gases and/or of quantities that can be derived from same |
WO1993020411A1 (en) * | 1992-04-01 | 1993-10-14 | Valtion Teknillinen Tutkimuskeskus | Method and device for determination of the velocity of a gas flowing in a pipe |
Cited By (5)
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---|---|---|---|---|
EP0797105A2 (en) * | 1996-03-21 | 1997-09-24 | Siemens Aktiengesellschaft | Method for measuring the time of flight of electric, electromagnetic or acoustic signals |
DE19611233A1 (en) * | 1996-03-21 | 1997-09-25 | Siemens Ag | Procedure for measuring the transit time of an electrical, electromagnetic or acoustic signal |
EP0797105B1 (en) * | 1996-03-21 | 2004-08-11 | Siemens Aktiengesellschaft | Method for measuring the time of flight of electric, electromagnetic or acoustic signals |
WO2002023136A1 (en) * | 2000-09-18 | 2002-03-21 | ABB Fläkt AB | A device and a method for measuring the flow in a fluid |
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 |
Also Published As
Publication number | Publication date |
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DE69530764T2 (en) | 2004-02-19 |
CA2188145C (en) | 2005-03-22 |
FI94909C (en) | 1995-11-10 |
FI94909B (en) | 1995-07-31 |
CA2188145A1 (en) | 1995-10-26 |
EP0756697A1 (en) | 1997-02-05 |
ATE240505T1 (en) | 2003-05-15 |
EP0756697B1 (en) | 2003-05-14 |
US5770806A (en) | 1998-06-23 |
DE69530764D1 (en) | 2003-06-18 |
FI941805A0 (en) | 1994-04-19 |
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