GB1086742A - Gas flow detectors - Google Patents

Gas flow detectors

Info

Publication number
GB1086742A
GB1086742A GB1083664A GB1083664A GB1086742A GB 1086742 A GB1086742 A GB 1086742A GB 1083664 A GB1083664 A GB 1083664A GB 1083664 A GB1083664 A GB 1083664A GB 1086742 A GB1086742 A GB 1086742A
Authority
GB
United Kingdom
Prior art keywords
flow
rate
fluid
bridge
chosen value
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
GB1083664A
Inventor
Frederick Martin Gray
Norman Hugh Riley
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.)
English Electric Co Ltd
Original Assignee
English Electric Co 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB1083664A priority Critical patent/GB1086742A/en
Priority to FR9014A priority patent/FR1426659A/en
Priority to NL6503167A priority patent/NL6503167A/xx
Priority to BE661055D priority patent/BE661055A/xx
Priority to DE1965E0028871 priority patent/DE1498315A1/en
Publication of GB1086742A publication Critical patent/GB1086742A/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
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/0006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances
    • G01P13/006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances by using thermal variables
    • 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
    • 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
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Temperature (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1,086,742. Measuring fluid-Bow electrically. ENGLISH ELECTRIC CO. Ltd. March 12, 1965 [March 13, 1964], No.10836/64. Heading G1N. [Also in Division H3] In a device for detecting changes in the rate of flow of a fluid (e.g. ventilating air in a mine) by virtue of the consequent changes in the cooling effect of the flow, an electric heating coil 21 exposed to the fluid flow is connected in an A. C. bridge circuit 47 with a temperature-compensating coil 22 which is similar but shielded from the fluid flow so as to be affected only by its temperature, the bridge being set by a slider 46 to be balanced at a chosen rate of flow; the phase-sense of any output from the bridge, relative to the A. C. supply at terminals 27, is indicative of the sense of the change in fluid flow rate from the chosen value. A transistor 51 acts as a phase-sensitive rectifier so that an amplifier 57 produces an output to energize a relay 64 only when the rate of flow is greater than or equal to the chosen value, the relay 64 being de-energized to light warning lamps 17 and actuate a control circuit 68 when the rate of flow falls below the chosen value. The sensitivity of the device may be reduced by fitting an enclosure with variable apertures over the coils 21, 22.
GB1083664A 1964-03-13 1964-03-13 Gas flow detectors Expired GB1086742A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB1083664A GB1086742A (en) 1964-03-13 1964-03-13 Gas flow detectors
FR9014A FR1426659A (en) 1964-03-13 1965-03-12 Electrical devices for detecting fluid flow
NL6503167A NL6503167A (en) 1964-03-13 1965-03-12
BE661055D BE661055A (en) 1964-03-13 1965-03-12
DE1965E0028871 DE1498315A1 (en) 1964-03-13 1965-03-12 Electric display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1083664A GB1086742A (en) 1964-03-13 1964-03-13 Gas flow detectors

Publications (1)

Publication Number Publication Date
GB1086742A true GB1086742A (en) 1967-10-11

Family

ID=9975218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1083664A Expired GB1086742A (en) 1964-03-13 1964-03-13 Gas flow detectors

Country Status (5)

Country Link
BE (1) BE661055A (en)
DE (1) DE1498315A1 (en)
FR (1) FR1426659A (en)
GB (1) GB1086742A (en)
NL (1) NL6503167A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687130A (en) * 1969-11-26 1972-08-29 Pelam Inc Instrument to measure pulmonary function
US4357830A (en) * 1979-09-21 1982-11-09 Nippon Soken, Inc. Gas flow measuring apparatus
GB2136579A (en) * 1983-03-10 1984-09-19 Dwyer Instr Thermal anemometer
GB2176292A (en) * 1985-06-11 1986-12-17 Potterton Int Ltd Air-flow measuring device and method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343974A1 (en) * 1976-03-10 1977-10-07 Honeywell Bull Soc Ind VENTILATION ENCLOSURE
DE3331203A1 (en) * 1983-08-30 1985-03-14 Securiton AG, Zollikofen, Bern Device for monitoring the velocity of a gas flow in a duct
DE3433368A1 (en) * 1984-09-12 1986-03-20 Robert Bosch Gmbh, 7000 Stuttgart METHOD AND DEVICE FOR CARRYING OUT THE METHOD FOR MEASURING THE FLOW RATE OF A FLOWING MEDIUM, ESPECIALLY IN CONNECTION WITH COMBUSTION ENGINES

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687130A (en) * 1969-11-26 1972-08-29 Pelam Inc Instrument to measure pulmonary function
US4357830A (en) * 1979-09-21 1982-11-09 Nippon Soken, Inc. Gas flow measuring apparatus
GB2136579A (en) * 1983-03-10 1984-09-19 Dwyer Instr Thermal anemometer
GB2176292A (en) * 1985-06-11 1986-12-17 Potterton Int Ltd Air-flow measuring device and method
GB2176292B (en) * 1985-06-11 1989-07-26 Potterton Int Ltd Air-flow measuring device and method

Also Published As

Publication number Publication date
FR1426659A (en) 1966-01-28
NL6503167A (en) 1965-09-14
BE661055A (en) 1965-07-01
DE1498315A1 (en) 1969-03-06

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