WO2001084089A1 - Debitmetre muni d'un capteur de flux magnetique - Google Patents

Debitmetre muni d'un capteur de flux magnetique Download PDF

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Publication number
WO2001084089A1
WO2001084089A1 PCT/US2000/035627 US0035627W WO0184089A1 WO 2001084089 A1 WO2001084089 A1 WO 2001084089A1 US 0035627 W US0035627 W US 0035627W WO 0184089 A1 WO0184089 A1 WO 0184089A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
chamber
fluid
sensor
meter
Prior art date
Application number
PCT/US2000/035627
Other languages
English (en)
Inventor
Kent Murray
Timothy Bianchi
David Hamilton
William J. Brennan, Jr.
Jerry W. Lovett
Walter Castleberry
Original Assignee
Schlumberger Resource Management Services, Inc.
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 Schlumberger Resource Management Services, Inc. filed Critical Schlumberger Resource Management Services, Inc.
Priority to AU2001227439A priority Critical patent/AU2001227439A1/en
Publication of WO2001084089A1 publication Critical patent/WO2001084089A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
    • G01F3/02—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
    • G01F3/04—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls
    • G01F3/06—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising members rotating in a fluid-tight or substantially fluid-tight manner in a housing
    • G01F3/12—Meters with nutating members, e.g. discs
    • 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
    • G01F1/06—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 tangential admission
    • G01F1/075—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 tangential admission with magnetic or electromagnetic coupling to the indicating device

Definitions

  • the present invention relates to an apparatus for measuring fluid flow using a magnetic flux sensor. More specifically, the present invention translates the kinetic energy of a moving fluid into a rotating magnetic field. A stationary sensor is used to detect the resulting fluctuations in magnetic flux and provide a signal from which fluid flow measurements are obtained.
  • U.S. Pat. No.5, 530,298, issued to Gerhold. discloses a natural gas volume meter.
  • a magnetic sensor is located in close proximity to a magnet that is mounted upon a rotatable element in the gas meter. As the kinetic energy of the moving gas causes the element to rotate, a single magnet also rotates to create a magnetic field of changing flux. As only a single magnet is utilized, the resolution of this apparatus is limited to one change in magnetic flux, or signal, per each 180 degrees of revolution. Furthermore, specific physical configurations of the sensor and magnet are not taught.
  • the entire disclosures of the U.S. Patents noted above are herein incorporated by reference into the subject disclosure.
  • the present invention provides a fluid meter that utilizes a magnetic flux sensor to perform flow measurements.
  • the fluid meter translates the kinetic energy of a moving fluid into a rotating magnetic field.
  • a single stationary sensor is located within the rotating magnetic field.
  • the sensor detects the fluctuations in magnetic flux created by the rotating magnetic field and provides a signal from which fluid flow measurements are obtained. While the present invention is not limited to the use of only one sensor, only a single sensor is required. Any sensor capable of detecting a change in magnetic field may be used.
  • One such suitable type of sensor is disclosed in U.S. Pat. No. 3,820,090, issued to Wiegand. This reference discloses a magnetic sensor that may be formed by cold working a wire constructed from iron, cobalt, and vanadium.
  • the fluid meter includes a first chamber having a fluid inlet and a fluid outlet.
  • a measuring element is located within the first chamber such that a fluid passing through the first chamber will cause the measuring element to rotate.
  • a magnet is provided in mechanical communication with the measuring element such that the magnet rotates about a centerline as the measuring element rotates.
  • a second chamber containing the magnetic flux sensor is attached to the first chamber. The sensor is configured such that the rotation of the magnet is detected by the sensor.
  • the second chamber may also include a register for receiving the signals provided by the sensor. The register may determine the fluid measurement from the signals, record this information, and provide a display of the fluid measurement.
  • the magnet may be constructed as a cylindrically shaped disk.
  • the magnet may be a simple bipolar magnet or, alternatively, may have multiple poles for increasing the number of changes in magnetic flux applied to the sensor during one revolution of the measuring element.
  • the register may determine fluid flow rate from the signals provided by the sensor, and may also totalize the volume of flow passing through the meter.
  • the present invention includes a rotatable member that is placed into the path of fluid flow such that the member rotates about as axis while acted upon by the moving fluid.
  • a magnet is provided having a centerline that is coincident with the axis of the rotatable member and is also configured with the rotatable member such that as the magnet rotates the rotatable member simultaneously rotates.
  • a magnetic flux sensor is then located near the magnet such that as the rotation of the magnet creates changing fields of magnetic flux the same may be detected by the sensor.
  • the present invention includes a first chamber having a fluid inlet and a fluid outlet.
  • a rotatable member is configured within the first chamber so that a fluid passing through the first chamber acts upon the member and causes it to rotate.
  • a first magnet is also located within the first chamber and is in mechanical communication with the rotatable member. As the rotatable member rotates, the first magnet also rotates about a centerline.
  • a second chamber is attached to the first chamber.
  • a second magnet is located within this second chamber and is configured such that the second magnet is in magnetic communication with the first magnet located in the first chamber. Accordingly, as the first magnet rotates, the second magnet also rotates simultaneously.
  • a magnetic flux sensor is also configured within the second chamber to detect the fluctuating magnetic field created by the rotating second magnet.
  • a first chamber that defines a fluid inlet and a fluid outlet.
  • a rotatable, magnetic member is located within the first chamber. As fluid passes through the first chamber, the fluid causes the rotatable, magnetic member to rotate about an axis.
  • a first housing that defines a fluid inlet and a fluid outlet to the first housing.
  • a rotatable magnetic, member is located within the first housing. As the fluid passes through the first housing, the rotatable, magnetic member is configured such that the moving fluid causes the member to rotate.
  • a second housing is attached to the first housing and contains a magnet. The magnet is configured within the second housing such that it is in magnetic communication with the rotatable, magnetic member. Accordingly, as the rotatable magnetic member rotates, the magnet located in the second housing also rotates simultaneously.
  • a magnetic flux sensor is configured within the second housing such that the rotation of the magnet in the second housing creates a changing field of magnetic flux that may be detected by the sensor.
  • a chamber having a fluid ingress and a fluid egress.
  • a magnet is located in this chamber and has a centerline about which the magnet is configured to rotate.
  • a measuring member is located within the chamber and configured such that water entering the chamber acts upon the measuring member so as to cause the magnet to rotate about its centerline.
  • a magnetic flux sensor is then located external to the chamber and is configured so that the rotation of the magnet may be detected by the sensor.
  • a chamber having a fluid entrance and a fluid exit.
  • a first member is also located in the chamber and has an axis about which the first member may rotate.
  • a plurality of magnets are attached to the first member. The magnets may be placed adjacent to one another or may be evenly spaced apart from each other along the first member.
  • a second member is also located within the chamber. The second member is configured with the first member such that a fluid flowing through the chamber acts upon the second member so as to cause the first member to rotate about its axis.
  • a magnetic flux sensor is then located external to the chamber but in proximity to the first member such that the rotations cause a field of changing magnetic flux that may be detected by the sensor.
  • a housing having a fluid inlet and a fluid outlet.
  • a magnet is also located within the housing.
  • the magnet has a centerline and is configured such that it is rotatable about the centerline.
  • Means are provided for causing the magnet to rotate about its centerline as a fluid flows through the housing.
  • Means are also provided for sensing rotation of the magnet about its centerline.
  • Fig. 1 is a perspective and partial cross-sectional view of an exemplary embodiment of the invention configured within an exemplary fluid meter.
  • Fig. 2 is a cross-sectional view of the embodiment depicted in Fig. 1.
  • Fig. 2B is an alternate embodiment of the present invention.
  • Fig. 3 is an exploded, perspective view depicting an exemplary configuration of the measuring element.
  • Fig. 4 is a perspective view of certain components depicted in Fig. 3.
  • Fig. 5 A through 5C depict examples of meter magnets that may be utilized with embodiments of the present invention.
  • Fig. 6 is a perspective view of another magnet configuration which may be used in an embodiment of the present invention.
  • Fig. 7 is a perspective and partial cross-sectional view of an embodiment of the present invention. Detailed Description of the Preferred Embodiments
  • the present invention relates to an apparatus that measures fluid flow by translating the kinetic energy of a moving fluid into a rotating magnetic field.
  • a stationary sensor detects the fluctuating magnetic flux produced by the rotating magnetic field and provides an electrical signal from which fluid measurements may be determined.
  • the present invention may provide an indication of flow rate, and may also be configured to totalize the volume of fluid flow.
  • Fluid meter 20 includes a first chamber 22 detachably connected to a second chamber 24.
  • a plurality of tabs 26 and a locking boss 28 are used to detachably secure the first chamber 22 to the second chamber 24.
  • Detachability allows for the second chamber 24 to be readily substituted during the life of the fluid meter 20 and thereby facilitates replacement or changes in features.
  • the second chamber 24 may provide a housing or interior for including a register to provide mechanical recording and display of fluid measurements.
  • the second chamber 24 may be substituted so as to include a register having solid state electronics for recording and reporting fluid measurements. Detachability is not required by the present invention; the first chamber 22 and second chamber 24 may also be permanently connected.
  • the first chamber 22 provides a housing or interior for a measuring element 30 that converts the kinetic energy of a moving fluid into a measurable rotation or other measurable movement.
  • the measuring element 30 By nutating about axis AA, the measuring element 30 translates the kinetic energy of fluid flowing through the meter 24 into the rotation of a meter magnet 32, as will be more fully described below.
  • the present invention is not limited to the particular measuring element 30 depicted in Fig. 1 and Fig.2, and may include any mechanism that can translate the kinetic energy of a flowing fluid into a measurable movement.
  • the measuring element 30 may also be constructed from a rotatable member, such as a turbine, rotor, disk, or other such mechanisms.
  • the measuring element 30 is encased within a cartridge 34, the details of which will be described more fully below.
  • fluid enters first chamber 24 through a fluid inlet or ingress 36. Fluid then travels along a conduit 38 and enters the cartridge 34 through a cartridge inlet 40 as indicated by the flow arrows 42. Within the cartridge 34, the fluid acts upon the measuring element 30. The measuring element 30 then converts the kinetic energy of the moving fluid in a measurable movement by nutating, or oscillating, about axis AA. A shaft 44, connected to measuring element 30, then acts upon a spindle 46 so as to cause the meter magnet 32 to rotate about axis AA on a magnet shaft 48.
  • the fluid meter 20 may be connected into the path of fluid flow at fluid inlet 36 and fluid outlet 54. This connection may be permanent or resealable. Any suitable resealable connections known in the art may be used. For example, the embodiment show in Fig. 1 uses resealable, threaded connectors 57 and 58.
  • the first chamber 22, measuring element 30, and cartridge 34 may be constructed from any number of materials suitable for contact with the fluid to be measured. By way of example only, these materials may include bronze, plastics, iron, copper, and various other materials.
  • a sensor 60 is configured within the second chamber 24 to detect the changing fields of magnetic flux created by rotations of the meter magnet 32. Any sensor 60 capable of detecting changes in the field of magnetic flux may be utilized.
  • Any sensor 60 capable of detecting changes in the field of magnetic flux may be utilized.
  • One such particular sensor that may be applied is referred to generally as a "Wiegand" wire.
  • this magnetic sensor is constructed from a bistable ferromagnetic wire having a core portion and a shell portion. The shell surrounding the core has a relatively high coercivity; while the core of the Wiegand wire has a relatively low coercivity. As set forth is in U.S.
  • Patent No. 3,820,090 which is incorporated herein by reference, indicates that the wire may be constructed from an alloy having 48% iron and 52% nickel.
  • the Weigard wire is formed to have a core and shell as described.
  • the higher coercivity shell acts upon the core of the Wiegand wire to cause a magnetizing of the core in a direction opposite to the magnetization of the shell.
  • this effect may be overcome so as to cause the magnetizing of the core to switch.
  • a coil, referred to as a "pick-up coil” placed appropriately near the Wiegand wire will detect the reversal of magnetization in the Wiegand wire because an electrical pulse will be simultaneously generated in the pick-up coil.
  • a fluid acting upon the measuring element 30 in cartridge 34 causes the meter magnet 32 to rotate about axis AA.
  • the sensor 60 is subjected to a field of changing magnetic flux.
  • the meter magnet 32 shown in Fig. 1 is divided into four quadrants of polarity. A complete revolution of meter magnet 32 thereby creates four changes in magnetic flux that are detected by sensor 60. These four changes may then be recorded by appropriate circuitry.
  • the four electrical pulses created in a pick-up coil placed near the Wiegand wire may be recorded.
  • the rate of fluid flow or amount of fluid flow may be calculated from the number of magnetic flux changes detected by the sensor 60.
  • a register located within the second chamber 24 may be provided with appropriate circuitry to perform such a calculation and display, store, or transmit the results.
  • a fluid flowing through the first chamber 22 causes the measuring element 30 to nutate about axis AA.
  • the cartridge 34 includes a base 62 and a cap 64. Enclosed within cartridge 34 is the measuring element 30 having the shaft 44.
  • Attached to the measuring element 30 is an aligning wheel 66.
  • measuring element 30 oscillates about axis AA, and the aligning wheel 66 rides up and down along a partition 68.
  • Partition 68 is fixed in place in part by a recess 70 in the base 62.
  • shaft 44 rotates about axis AA causing meter magnet 32 to rotate.
  • shaft 44 acts upon the spindle 46, which in turn is in mechanical communication with the meter magnet 32.
  • the entire assembly shown in Fig. 3 and Fig. 4, comprising the cartridge 34, is located within first chamber 22 as shown in Fig. 1 and Fig. 2.
  • meter magnet 32 may be constructed to have a plurality of poles. Increasing the numbers of poles within meter magnet 32 increases the resolution capability of fluid meter 20 by providing more changes in magnetic flux for a given revolution of measuring element 30.
  • the meter magnet 32 shown in Fig. 5 A would produce four signals during one revolution.
  • the meter magnet 132 shown in Fig. 5B would produce six pulses during one revolution.
  • the magnet 232 shown in Fig. 5C would produce only two pulses during one revolution.
  • Fig. 6 shows elements of another embodiment of the present invention in which a plurality of meter magnets 232 are attached to a rotating platform 78.
  • shaft 44 contacts spindle 46 and thereby causes the platform 78 to rotate.
  • the cartridge 34 is located within first chamber 22.
  • Sensor 60 is located within the second chamber 24. As platform 78 rotates due to the flow of fluid through cartridge 34, sensor 60 detects the resulting changes in magnetic field transferred through the walls of the first chamber 22 and second chamber the 24.
  • Fig. 6 and Fig. 7 depict the use of four meter magnets 32
  • this embodiment of the present invention is not limited to this specific configuration.
  • numerous separate magnets 32 may be spaced about platform 78.
  • the magnets 32 should be oriented along the platform 78 so that during rotations the sensor 60 is subjected to changing fields of magnetic flux.
  • the magnets 32 should be positioned along the platform 78 so that at least one change in polarity of the magnetic field, or change in magnetic flux, is detected by the sensor 60 as a result of the rotation of platform 68.
  • the sensor 60 is a
  • Wiegand wire it is conceivable that only one magnet 32 may be used.
  • a single magnet may be located along the platform 78 so that sensor 60 is subjected to a pulsing magnetic flux of a single polarity during the rotation of platform 78.
  • at least two magnets 32 are used and are oriented so that sensor 60 is subjected to a magnetic field of changing polarity as the platform 78 rotates.
  • FIG. 2B shows another embodiment 120 of the present invention where a register magnet 80 is located within the second chamber 24.
  • the register magnet 80 is magnetically coupled to the meter magnet 32 due to the attractive forces of the magnets transmitted through the walls of first chamber 22 and second chamber 24.
  • fluid acts upon the measuring element 30 causing the shaft 44 to drive the spindle 46.
  • the meter magnet 32 rotates so as to cause the register magnet 80 to rotate about a register magnet shaft 82.
  • Sensor 60 located within second chamber 24, may then be located in proximity to register magnet 72.
  • register magnet 72 may be constructed so as to subject sensor 60 to any number of changes in the field of magnetic flux during the rotation of register magnet 72.
  • cartridge 34 may include a rotating element that in inherently magnetic.
  • cartridge 34 may be a turbine or rotating disk constructed in whole or part of magnetic material. The sensor 60 may then be positioned so that it is subjected to the changes in magnetic flux caused by the rotation of such elements.

Abstract

L'invention concerne un dispositif (20) servant à mesurer le débit d'un fluide, où l'énergie cinétique d'un fluide en déplacement est transformée en un champ magnétique tournant. Dans le dispositif de l'invention, l'élément de mesure (30) est situé dans une première enceinte (22), un aimant (32) étant en communication mécanique avec ledit élément de mesure. On utilise un capteur fixe (60), placé dans le champ magnétique, afin de détecter les variations du flux magnétique et de réaliser ainsi des mesures du débit du liquide.
PCT/US2000/035627 2000-05-04 2000-12-29 Debitmetre muni d'un capteur de flux magnetique WO2001084089A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001227439A AU2001227439A1 (en) 2000-05-04 2000-12-29 Fluid meter with magnetic flux sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56418100A 2000-05-04 2000-05-04
US09/564,181 2000-05-04

Publications (1)

Publication Number Publication Date
WO2001084089A1 true WO2001084089A1 (fr) 2001-11-08

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PCT/US2000/035627 WO2001084089A1 (fr) 2000-05-04 2000-12-29 Debitmetre muni d'un capteur de flux magnetique

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WO (1) WO2001084089A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015089595A1 (fr) * 2013-12-17 2015-06-25 MANGANELLI, Laurindo Débitmètre télémétrique pour liquides avec changement de mécanisme
EP3239666A1 (fr) 2016-04-27 2017-11-01 PLUM spólka z ograniczona odpowiedzialnoscia Ensemble de lecture électronique destiné à un débitmètre
CN108180957A (zh) * 2018-02-08 2018-06-19 江苏远传智能科技有限公司 无磁远传水表

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388595A (en) * 1965-12-27 1968-06-18 Rockwell Mfg Co Flow meter
US3949606A (en) * 1973-09-10 1976-04-13 Blancett Joe H Fluid meter and adapter units therefor
US4265127A (en) * 1978-06-02 1981-05-05 Kimmon Manufacturing Co., Ltd. Low meter system provided with a pulse generator
GB2102129A (en) * 1981-07-17 1983-01-26 Flight Refueling Ltd Fluid flow meters using Wiegand effect devices
US4461174A (en) * 1981-07-16 1984-07-24 Shinhan Kongki Co., Ltd. Vane wheel water meter
US4793192A (en) * 1985-10-30 1988-12-27 Bopp & Reuther Electromagnetic pulse receiver for a flow meter
US6098456A (en) * 1997-05-06 2000-08-08 Societe Anonyme De Production De Procedes De Comptage De L'eau Et Autres Liquides, Sappel Anti-fraud liquid meters having a drive and driven magnets with double polarity faces

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388595A (en) * 1965-12-27 1968-06-18 Rockwell Mfg Co Flow meter
US3949606A (en) * 1973-09-10 1976-04-13 Blancett Joe H Fluid meter and adapter units therefor
US4265127A (en) * 1978-06-02 1981-05-05 Kimmon Manufacturing Co., Ltd. Low meter system provided with a pulse generator
US4461174A (en) * 1981-07-16 1984-07-24 Shinhan Kongki Co., Ltd. Vane wheel water meter
GB2102129A (en) * 1981-07-17 1983-01-26 Flight Refueling Ltd Fluid flow meters using Wiegand effect devices
US4793192A (en) * 1985-10-30 1988-12-27 Bopp & Reuther Electromagnetic pulse receiver for a flow meter
US6098456A (en) * 1997-05-06 2000-08-08 Societe Anonyme De Production De Procedes De Comptage De L'eau Et Autres Liquides, Sappel Anti-fraud liquid meters having a drive and driven magnets with double polarity faces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015089595A1 (fr) * 2013-12-17 2015-06-25 MANGANELLI, Laurindo Débitmètre télémétrique pour liquides avec changement de mécanisme
EP3239666A1 (fr) 2016-04-27 2017-11-01 PLUM spólka z ograniczona odpowiedzialnoscia Ensemble de lecture électronique destiné à un débitmètre
CN108180957A (zh) * 2018-02-08 2018-06-19 江苏远传智能科技有限公司 无磁远传水表

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