SE9002446L - DEVICE TO DETERMINE A BOAT SPEED - Google Patents
DEVICE TO DETERMINE A BOAT SPEEDInfo
- Publication number
- SE9002446L SE9002446L SE9002446A SE9002446A SE9002446L SE 9002446 L SE9002446 L SE 9002446L SE 9002446 A SE9002446 A SE 9002446A SE 9002446 A SE9002446 A SE 9002446A SE 9002446 L SE9002446 L SE 9002446L
- Authority
- SE
- Sweden
- Prior art keywords
- measuring body
- cooling
- time interval
- flow rate
- measured
- 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
- G01F1/68—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.
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 |
PCT/SE1991/000494 WO1992001940A1 (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 |
EP19910913368 EP0540595A1 (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 SE9002446D0 (en) | 1990-07-17 |
SE9002446L true 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)
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)
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 |
-
1990
- 1990-07-17 SE SE9002446A patent/SE466820B/en not_active IP Right Cessation
-
1991
- 1991-07-15 WO PCT/SE1991/000494 patent/WO1992001940A1/en not_active Application Discontinuation
- 1991-07-15 EP EP19910913368 patent/EP0540595A1/en not_active Ceased
- 1991-07-15 JP JP91512589A patent/JPH05508923A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH05508923A (en) | 1993-12-09 |
SE466820B (en) | 1992-04-06 |
WO1992001940A1 (en) | 1992-02-06 |
SE9002446D0 (en) | 1990-07-17 |
EP0540595A1 (en) | 1993-05-12 |
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