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GB1488012A - Mass flow transducers - Google Patents

Mass flow transducers

Info

Publication number
GB1488012A
GB1488012A GB2739774A GB2739774A GB1488012A GB 1488012 A GB1488012 A GB 1488012A GB 2739774 A GB2739774 A GB 2739774A GB 2739774 A GB2739774 A GB 2739774A GB 1488012 A GB1488012 A GB 1488012A
Authority
GB
United Kingdom
Prior art keywords
flow
thermistor
rate
imbalance
fluid
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB2739774A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Babcock Partner No 6 Ltd
Original Assignee
Hawker Siddeley Dynamics Engineering Ltd
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 Hawker Siddeley Dynamics Engineering Ltd filed Critical Hawker Siddeley Dynamics Engineering Ltd
Priority to GB2739774A priority Critical patent/GB1488012A/en
Publication of GB1488012A publication Critical patent/GB1488012A/en
Expired legal-status Critical Current

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
    • G01P5/10—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
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/02—Indicating direction only, e.g. by weather vane

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1488012 Measuring fluid flow-rate electrically HAWKER SIDDELEY DYNAMICS ENG Ltd 18 Sept 1975 [20 June 1974] 27397/74 Heading GIN The direction of fluid-flow in a pipe 1 Fig. 2 is determined by comparing the temperatures of two bodies 3, 5 located equidistantly from a heated body 4: the rate of flow is determined by comparing the temperatures of the heated body 4 and of the upstream body 3 or 5. The bodies 3, 4, 5 comprise metallic rings on a plastics cylinder 2 supported by a pillar 10. Each ring is associated with a thermistor 6, 7 or 8 respectively, and the centre ring 4 is heated by an element 9. Thermistors 6, 8 form adjacent arms of a bridge network whose imbalance is amplified at 16, Fig. 3, to operate a relay 17 which either closes switch 18 and lights lamp 20, for fluid-flow from left to right, or closes switch 19 and lights lamp 21, for flow in the opposite direction. The appropriate upstream thermistor 6 or 8 is thus connected in a second bridge network with thermistor 7 and their resistance difference produces an imbalance which is amplified at 22, linearized at 24 and shown at 23 as indicative of mass fluid flow-rate. Alternatively the imbalance signal may be used to control the heating current to maintain a constant temperature difference. The rings 3, 4, 5 may alternatively be inside the cylinder 2 or on the surface of the pipe 1.
GB2739774A 1975-09-18 1975-09-18 Mass flow transducers Expired GB1488012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2739774A GB1488012A (en) 1975-09-18 1975-09-18 Mass flow transducers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2739774A GB1488012A (en) 1975-09-18 1975-09-18 Mass flow transducers

Publications (1)

Publication Number Publication Date
GB1488012A true GB1488012A (en) 1977-10-05

Family

ID=10258927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2739774A Expired GB1488012A (en) 1975-09-18 1975-09-18 Mass flow transducers

Country Status (1)

Country Link
GB (1) GB1488012A (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2439388A1 (en) * 1978-10-20 1980-05-16 Bosch Gmbh Robert INSTALLATION FOR MEASURING THE MASS OF A FLOWING FLUID
DE2900210A1 (en) * 1979-01-04 1980-07-17 Bosch Gmbh Robert DEVICE FOR MEASURING THE MASS OF A FLOWING MEDIUM
FR2512548A1 (en) * 1981-09-10 1983-03-11 Bosch Gmbh Robert METHOD AND DEVICE FOR MEASURING THE QUANTITY OF FLUID FLOWING BY PULSATION IN A TRANSVERSE SECTION OF FLOW
US4389876A (en) * 1980-08-26 1983-06-28 Honeywell Inc. Temperature sensor and detector cell utilizing the same
FR2575294A1 (en) * 1984-12-21 1986-06-27 Vaillant Sarl Device for measuring the speed of flow of a fluid
FR2592971A1 (en) * 1986-01-15 1987-07-17 Gaz De France Device for interrupting the operation of an apparatus using a gaseous fluid
EP0267354A1 (en) * 1986-11-04 1988-05-18 VDO Adolf Schindling AG Apparatus for the determination of the direction of a flow
EP0269781A1 (en) * 1986-11-04 1988-06-08 VDO Adolf Schindling AG Device for determining mass flow and the flow direction
GB2198238A (en) * 1986-11-24 1988-06-08 British Gas Plc Method and apparatus for measuring a property of material
EP0235358A3 (en) * 1986-03-03 1988-07-20 Vdo Adolf Schindling Ag Apparatus for measuring fluid-flow velocity
US4843882A (en) * 1985-08-13 1989-07-04 Nippon Soken, Inc. Direct-heated flow measuring apparatus having improved sensitivity response speed
EP0402977A1 (en) * 1989-06-13 1990-12-19 Bronkhorst High-Tech B.V. Device for determining the speed and direction of a flowing medium
EP0427018A3 (en) * 1989-11-08 1991-05-29 Giselher R. Gust Measuring device for measuring the speed of a fluid
US5417110A (en) * 1991-05-29 1995-05-23 Wood; Tony J. Unit and system for sensing fluid velocity
WO1995020166A1 (en) * 1994-01-19 1995-07-27 Vincenzo Arrichiello Device for measuring the velocity of a flow of fluid
US5582628A (en) * 1991-05-29 1996-12-10 Wood; Tony J. Unit and system for sensing fluid velocity
US5817932A (en) * 1994-08-02 1998-10-06 Hitachi, Ltd. Intake air flow measuring apparatus for internal combustion engine
GB2449654A (en) * 2007-05-30 2008-12-03 Havguardian Ltd Airflow sensor

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2439388A1 (en) * 1978-10-20 1980-05-16 Bosch Gmbh Robert INSTALLATION FOR MEASURING THE MASS OF A FLOWING FLUID
DE2900210A1 (en) * 1979-01-04 1980-07-17 Bosch Gmbh Robert DEVICE FOR MEASURING THE MASS OF A FLOWING MEDIUM
US4389876A (en) * 1980-08-26 1983-06-28 Honeywell Inc. Temperature sensor and detector cell utilizing the same
FR2512548A1 (en) * 1981-09-10 1983-03-11 Bosch Gmbh Robert METHOD AND DEVICE FOR MEASURING THE QUANTITY OF FLUID FLOWING BY PULSATION IN A TRANSVERSE SECTION OF FLOW
FR2575294A1 (en) * 1984-12-21 1986-06-27 Vaillant Sarl Device for measuring the speed of flow of a fluid
US4843882A (en) * 1985-08-13 1989-07-04 Nippon Soken, Inc. Direct-heated flow measuring apparatus having improved sensitivity response speed
FR2592971A1 (en) * 1986-01-15 1987-07-17 Gaz De France Device for interrupting the operation of an apparatus using a gaseous fluid
US4841769A (en) * 1986-03-03 1989-06-27 Vdo Adolf Schindling Ag Apparatus for measuring velocity of flow
EP0235358A3 (en) * 1986-03-03 1988-07-20 Vdo Adolf Schindling Ag Apparatus for measuring fluid-flow velocity
EP0269781A1 (en) * 1986-11-04 1988-06-08 VDO Adolf Schindling AG Device for determining mass flow and the flow direction
EP0267354A1 (en) * 1986-11-04 1988-05-18 VDO Adolf Schindling AG Apparatus for the determination of the direction of a flow
GB2198238A (en) * 1986-11-24 1988-06-08 British Gas Plc Method and apparatus for measuring a property of material
GB2198238B (en) * 1986-11-24 1990-08-22 British Gas Plc Method and apparatus for measuring a property of material
EP0402977A1 (en) * 1989-06-13 1990-12-19 Bronkhorst High-Tech B.V. Device for determining the speed and direction of a flowing medium
EP0427018A3 (en) * 1989-11-08 1991-05-29 Giselher R. Gust Measuring device for measuring the speed of a fluid
US5417110A (en) * 1991-05-29 1995-05-23 Wood; Tony J. Unit and system for sensing fluid velocity
US5582628A (en) * 1991-05-29 1996-12-10 Wood; Tony J. Unit and system for sensing fluid velocity
WO1995020166A1 (en) * 1994-01-19 1995-07-27 Vincenzo Arrichiello Device for measuring the velocity of a flow of fluid
US5817932A (en) * 1994-08-02 1998-10-06 Hitachi, Ltd. Intake air flow measuring apparatus for internal combustion engine
CN1050198C (en) * 1994-08-02 2000-03-08 株式会社日立制作所 Device for measuring amount of absorbed air of internal combustion
GB2449654A (en) * 2007-05-30 2008-12-03 Havguardian Ltd Airflow sensor
GB2449654B (en) * 2007-05-30 2011-07-06 Havguardian Ltd Airflow sensor

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee