GB1492632A - Electric circuit for turbine flow meters - Google Patents

Electric circuit for turbine flow meters

Info

Publication number
GB1492632A
GB1492632A GB1001075A GB1001075A GB1492632A GB 1492632 A GB1492632 A GB 1492632A GB 1001075 A GB1001075 A GB 1001075A GB 1001075 A GB1001075 A GB 1001075A GB 1492632 A GB1492632 A GB 1492632A
Authority
GB
United Kingdom
Prior art keywords
voltage
cycle
comparator
signals
turbine
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
GB1001075A
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.)
Compteurs Schlumberger SA
Original Assignee
Compteurs Schlumberger SA
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 Compteurs Schlumberger SA filed Critical Compteurs Schlumberger SA
Priority to GB1001075A priority Critical patent/GB1492632A/en
Publication of GB1492632A publication Critical patent/GB1492632A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D473/00—Heterocyclic compounds containing purine ring systems
    • C07D473/02—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6
    • C07D473/16—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms
    • 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
    • G01F1/05—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 mechanical effects
    • G01F1/10—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 mechanical effects using rotating vanes with axial admission
    • G01F1/115—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 mechanical effects using rotating vanes with axial admission with magnetic or electromagnetic coupling to the indicating device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
    • 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
    • G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
    • G01P5/06—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes
    • G01P5/07—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes with electrical coupling to the indicating device

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1492632 Electric flowmeters COMPTEURS SCHLUMBERGER 11 March 1975 10010/75 Heading G1N The voltage signals from a turbine type flowmeter are fed through an amplitude or frequency cut-off unit whose threshold value is adjusted to provide automatic compensation between the pulses lost on starting and gained on stopping, due to the inertia of the moving members. The turbine speed W o at which this compensation occurs is established experimentally and defines the frequency threshold, and an additional frequency comparator circuit enables the first pulse to be fed out by sensing a long interval after receipt of the last pulse. In an embodiment sensing the amplitude of the turbine signals, the cut-off voltage is determined from the speed W o as modified by the integral of each successive positive half-cycle. As shown, Fig. 3, the positive half-cycle of the flowmeter signals E are directed by rectifier 8 to an integrator 10 and to a comparator 11. The negative half-cycles are directed by rectifier 9 to monostable 14 which closes switch 12 at the start of the negative half-cycle, to feed the integrated voltage to terminal E 2 of comparator 11, and closes switch 16 at the end of the negative halfcycle to bring the integrated voltage back to zero. If the sensed positive half-cycle voltage at e 1 is greater than the integrated voltage at e2, suitably modified by a factor of W o , a metering pulse is fed out of comparator 11 at S.
GB1001075A 1975-03-11 1975-03-11 Electric circuit for turbine flow meters Expired GB1492632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1001075A GB1492632A (en) 1975-03-11 1975-03-11 Electric circuit for turbine flow meters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1001075A GB1492632A (en) 1975-03-11 1975-03-11 Electric circuit for turbine flow meters

Publications (1)

Publication Number Publication Date
GB1492632A true GB1492632A (en) 1977-11-23

Family

ID=9959740

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1001075A Expired GB1492632A (en) 1975-03-11 1975-03-11 Electric circuit for turbine flow meters

Country Status (1)

Country Link
GB (1) GB1492632A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3835732A1 (en) * 2019-12-10 2021-06-16 Bleckmann GmbH & Co. KG Flowmeter comprising an electronic magnetic sensor with buffered power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3835732A1 (en) * 2019-12-10 2021-06-16 Bleckmann GmbH & Co. KG Flowmeter comprising an electronic magnetic sensor with buffered power supply
US12013266B2 (en) 2019-12-10 2024-06-18 Bleckmann Gmbh & Co. Kg Flowmeter comprising an electronic magnetic sensor with buffered power supply

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee