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SE9002446D0 - PROCEDURE AND DEVICE FOR FLOW SPEED Saturation - Google Patents

PROCEDURE AND DEVICE FOR FLOW SPEED Saturation

Info

Publication number
SE9002446D0
SE9002446D0 SE9002446A SE9002446A SE9002446D0 SE 9002446 D0 SE9002446 D0 SE 9002446D0 SE 9002446 A SE9002446 A SE 9002446A SE 9002446 A SE9002446 A SE 9002446A SE 9002446 D0 SE9002446 D0 SE 9002446D0
Authority
SE
Sweden
Prior art keywords
measuring body
cooling
time interval
flow rate
measured
Prior art date
Application number
SE9002446A
Other languages
Swedish (sv)
Other versions
SE466820B (en
SE9002446L (en
Inventor
Bengt Noren
Original Assignee
Bengt Noren
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 Bengt Noren filed Critical Bengt Noren
Priority to SE9002446A priority Critical patent/SE466820B/en
Publication of SE9002446D0 publication Critical patent/SE9002446D0/en
Priority to EP19910913368 priority patent/EP0540595A1/en
Priority to JP91512589A priority patent/JPH05508923A/en
Priority to PCT/SE1991/000494 priority patent/WO1992001940A1/en
Publication of SE9002446L publication Critical patent/SE9002446L/en
Publication of SE466820B publication Critical patent/SE466820B/en

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
    • G01F1/68—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 using thermal effects
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
    • G01F1/6986—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters with pulsed heating, e.g. dynamic methods
    • 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
    • G01F1/68—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 using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • 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
    • G01P5/10—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables
    • G01P5/12—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables using variation of resistance of a heated conductor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Measuring Volume Flow (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)

Abstract

A process and an apparatus for flow rate measurement are based on the utilization of a measuring body exposed to the medium, the flow of which is to be measured, a physical quantity of said measuring body, for instance the resistance, changing with the temperature. The quantity (R1, R2) of the measuring body is measured in a measurement sequence at least two times during the cooling or heating of the measuring body, the time interval between the measurements being known or the same. Furthermore, the quantity (R0) of the measuring body is measured before heating or after cooling, i.e. when the measuring body has substantially the same temperature as the medium flow. Finally, the flow rate is calculated on the basis of the measurement values (R0, R1, R2) and the time interval (between R1 and R2). At least three quantity measurements are instead carried out with a known or the same time interval according to an alternative during heating or cooling and the flow rate is calculated on the basis thereof.
SE9002446A 1990-07-17 1990-07-17 PROCEDURE AND DEVICE FOR FLOW SPEED Saturation SE466820B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9002446A SE466820B (en) 1990-07-17 1990-07-17 PROCEDURE AND DEVICE FOR FLOW SPEED Saturation
EP19910913368 EP0540595A1 (en) 1990-07-17 1991-07-15 Method and device for flow rate measurement
JP91512589A JPH05508923A (en) 1990-07-17 1991-07-15 Flow rate measurement method and device
PCT/SE1991/000494 WO1992001940A1 (en) 1990-07-17 1991-07-15 Method and device for flow rate measurement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9002446A SE466820B (en) 1990-07-17 1990-07-17 PROCEDURE AND DEVICE FOR FLOW SPEED Saturation

Publications (3)

Publication Number Publication Date
SE9002446D0 true SE9002446D0 (en) 1990-07-17
SE9002446L SE9002446L (en) 1992-01-18
SE466820B SE466820B (en) 1992-04-06

Family

ID=20380011

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9002446A SE466820B (en) 1990-07-17 1990-07-17 PROCEDURE AND DEVICE FOR FLOW SPEED Saturation

Country Status (4)

Country Link
EP (1) EP0540595A1 (en)
JP (1) JPH05508923A (en)
SE (1) SE466820B (en)
WO (1) WO1992001940A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2272296B (en) * 1992-11-04 1997-04-16 Fisher & Paykel Medical airway temperature sensor
US5857368A (en) * 1995-10-06 1999-01-12 Applied Materials, Inc. Apparatus and method for fabricating metal paths in semiconductor substrates through high pressure extrusion
FR2751413A1 (en) * 1996-07-18 1998-01-23 Giraud Marc Thermal tachometer device for measuring relative speed for boats, windsurfers
DE10009638A1 (en) * 2000-03-01 2001-09-13 Invent Flow Control Systems Gm Gas flow speed measurement method, involves integrating voltage pulses of specific pulse width applied to heating filament and measuring resistance of filament during pulse switch-off time
EP1327864A1 (en) * 2002-01-10 2003-07-16 Abb Research Ltd. Piezoelectric mass flow sensor
US7333899B2 (en) * 2004-10-13 2008-02-19 Therm-O-Disc, Incorporated Fluid flow rate sensor and method of operation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1193973A (en) * 1966-11-02 1970-06-03 Graviner Colnbrook Ltd Improvements in Apparatus Responsive to Fluid Flow
GB1230638A (en) * 1968-06-08 1971-05-05

Also Published As

Publication number Publication date
WO1992001940A1 (en) 1992-02-06
JPH05508923A (en) 1993-12-09
EP0540595A1 (en) 1993-05-12
SE466820B (en) 1992-04-06
SE9002446L (en) 1992-01-18

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