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WO2002001164A1 - Debitmetre pour liquides - Google Patents

Debitmetre pour liquides Download PDF

Info

Publication number
WO2002001164A1
WO2002001164A1 PCT/GB2001/002879 GB0102879W WO0201164A1 WO 2002001164 A1 WO2002001164 A1 WO 2002001164A1 GB 0102879 W GB0102879 W GB 0102879W WO 0201164 A1 WO0201164 A1 WO 0201164A1
Authority
WO
WIPO (PCT)
Prior art keywords
passage
meter
meter according
rotary element
liquid
Prior art date
Application number
PCT/GB2001/002879
Other languages
English (en)
Inventor
Hassan Talal Yousef Assali
Atef Abdel Salam Abdel-Hady
Yousef Ahmad Osailan
Original Assignee
Hassan Talal Yousef Assali
Abdel Hady Atef Abdel Salam
Yousef Ahmad Osailan
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 Hassan Talal Yousef Assali, Abdel Hady Atef Abdel Salam, Yousef Ahmad Osailan filed Critical Hassan Talal Yousef Assali
Priority to AU2001266198A priority Critical patent/AU2001266198A1/en
Publication of WO2002001164A1 publication Critical patent/WO2002001164A1/fr

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
    • G01F1/05—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
    • 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
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/061—Indicating or recording devices for remote indication
    • G01F15/063—Indicating or recording devices for remote indication using electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/065—Indicating or recording devices with transmission devices, e.g. mechanical
    • G01F15/066—Indicating or recording devices with transmission devices, e.g. mechanical involving magnetic transmission devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
    • G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
    • G01F15/0755—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means involving digital counting

Definitions

  • the present invention concerns flow meters for liquids, and is particularly concerned with a flow meter for measuring water flows in domestic and industrial supply arrangements .
  • Conventional water meters for determining the consumption of water by a household or user generally comprise a turbine rotated by the water flow, and a mechanical transmission or gear train which drives a mechanical counter from the rotation of the turbine.
  • a drawback with such apparatus is that significant driving force is required from the turbine to operate the mechanical counting arrangements, and at low flow rates the forces generated on the turbine may be insufficient to drive the counting mechanism, leading to errors in the measurement of the volume of water consumed.
  • the present invention seeks to provide a flow meter for liquids, particularly but not exclusively for use in measuring domestic consumption of water from a mains supply, wherein an accurate measurement of the flow of water can be made even when the flow is small .
  • a further aspect of the invention is to provide a domestic or industrial water meter which can accurately measure the volume of water consumed by a user, without the need for a complex mechanical counting arrangement and drive transmission.
  • a meter for measuring a flow of a liquid comprising a passage through which a liquid may flow, a rotary element mounted at least partially in said passage so as to be rotatable by a liquid flowing through the passage, electromagnetic sensing means for sensing rotation of the rotary element, means for determining a flow rate of liquid through the passage on the basis of the sensed rotation, and display means for displaying information related to said determined flow rate.
  • the rotary element is a Pelton wheel mounted in a chamber immediately downstream of an orifice through which liquid may pass to impinge sequentially on radially-extending vanes of the Pelton wheel.
  • the orifice is a circular opening and the axis of the Pelton wheel extends substantially tangentially with respect to the orifice.
  • the displayed information is a cumulative total volume of liquid which has passed through the passage.
  • Figure 1 is a side view of a water meter according to the invention.
  • Figure 2 is a top view of the water meter shown in Figure i;
  • Figure 3 is a vertical section of the water meter of Figures 1 and 2;
  • Figure 4 is a schematic diagram of electronic circuitry of the water meter
  • Figure 5 is an illustration of the data stored in a correlation module
  • Figure 6 is an illustration of the data stored in a tariff memory table
  • the water meter comprises an upper housing part 1 containing the electronic circuitry, and having an upwardly-facing opening 2.
  • the opening 2 is sealed by a transparent cover 3.
  • a horizontal passage 4 is provided with a threaded connection 5 at each of its ends, for connection to a water pipe.
  • the passage 4 has a coaxial orifice 6 positioned slightly upstream of its midpoint, and immediately downstream of the orifice a Pelton wheel 7 is mounted in an enlarged chamber 8 extending upwardly of the passage, so that water flowing through the orifice 6 will impinge on the lower (as seen in the Figure) vanes 9 of the Pelton wheel 7 to cause the wheel to rotate.
  • the rotation axis of the Pelton wheel 7 is oriented substantially tangentially to the passage 4 and to the orifice 6.
  • the orifice 6 is preferably circular, and for general domestic use may have a diameter of approximately 7 mm.
  • the orifice 6 may be made larger and the diameter of the Pelton wheel 7 may be increased correspondingly.
  • the vanes 9 of the Pelton wheel 7 are formed from a metallic or a magnetic material, so that rotation of the wheel may be detected by a sensing coil.
  • the Pelton wheel 7 is an injection-molded component formed from plastics material with a magnetic filler.
  • the Pelton wheel 7 has six radially-extending vanes 9, but it is foreseen that any suitable number of vanes may be provided.
  • the chamber 8 is bounded at its upper face by a top wall 10, to the upper face of which is mounted a sensing coil 11 for detecting rotation of the Pelton wheel 7.
  • the sensing coil 11 is electrically connected to a circuit board 12 mounted in the upper part of the housing 1 , and having a display 13 which is visible through the transparent cover 3 which seals the opening 2 in the ' upper face of the housing 1.
  • the circuit board 12 comprises a processor 20, a clock circuit 21, memory modules 22 and 23, and the display 13.
  • the elements of the metering circuit are illustrated in figure 4, together with optional elements such as an input/output device 24, a tariff memory table 25, and a transceiver 26.
  • the water meter shown in Figures 1 to 3 is of a simplified type, in which the display 13 indicates only a cumulative total of the volume of water which has passed through the meter. The meter is intended to be read by the water supplier at the end of each billing period, and the consumption of water in the preceding period is calculated from the difference of the last two readings .
  • the circuitry for this simplified type of meter comprises the sensing coil 11 for generating pulses as water flows through the meter, a processor 20 for performing the data processing, the clock circuit 21 for defining time intervals, a total memory module 22 for storing the cumulative total, a correlation module 23, which is a memory module storing correlations between the number of pulses in a time interval and a corresponding volume of water passing through the meter in that time interval, and a display 13.
  • the processor 20 operates in a sequence of clock intervals, each interval having a predetermined length. During a clock interval, the processor receives the train of pulses from the sensor coil 11, and counts how many pulses have been received in that clock interval. The processor 20 then "looks up" in the correlation module 23 the value for the volume of water which corresponds to the number of pulses counted, and adds that value to a cumulative total. The total is then stored in the total memory module 22, which is preferably a non-volatile memory, and is also sent to the display 13. The displayed total thus represents the volume of water which has passed through the meter in all preceding time intervals.
  • the processor counter is then reset, and the number of pulses in the next clock interval is counted.
  • the processor determines from the correlation module 23 the volume of water passing through the meter in the next clock interval, and adds it to the cumulative total, updating the stored total in the total memory module 22 and the display 13.
  • the values stored in the correlation module 23, illustrated schematically in figure 6, are determined in a calibration mode for a meter having the same passage 4 and orifice 6 dimensions as the meter in which the circuit board is to be used.
  • the calibration mode water is passed through the passage 4 and orifice 6 at a number of predetermined flow rates, and for each flow rate the number of pulses generated by the sensing coil 11 in a predetermined clock interval is recorded. From the flow rate and the length of the clock interval, an increment value corresponding to the volume of water passing through the passage 4 during each clock interval is calculated and recorded, to be associated with the number of pulses counted at that flow rate.
  • the calibration mode may be performed at a number of different pressure ranges, and for a number of different Pelton wheels, so that a plurality of correlation tables are generated, correlating the increment value and number of pulses for each Pelton wheel at each pressure range.
  • the correlation module 23 may be programmed to store a single correlation table corresponding to the Pelton wheel fitted to the meter and to the water pressure where the meter is to be used.
  • the correlation module 23 is programmed to store a number of different correlation tables each corresponding to a particular Pelton wheel and a range of mains water pressures, then on installation of the meter the installer will install a particular Pelton wheel, and will test the mains water pressure and then, using an input device, will select the appropriate correlation table to be accessed by the processor.
  • the clock circuit 21 of the meter may include a real-time clock, which the installer will set to local time during the installation process.
  • the meter may include a further memory, the tariff memory table 25, in which the installer may set starting and ending times to define intervals during which different tariffs are payable for the consumption of water.
  • a first tariff band W extending from 7 a.m. to 10 a.m.
  • a second tariff band X from 10 a.m. to 4 p.m., and so on.
  • the total memory module will then include not only a cumulative total, but also a stored total for the volume of water corresponding to each tariff band.
  • the processor 20 will determine as before a volume of water corresponding to a clock interval, and will add that volume to the cumulative total. The processor will also compare the current time with the time intervals set in the tariff memory table, and will add to the stored total for the appropriate tariff band (W, X, etc) an increment corresponding to that volume.
  • the display may display only a single number, corresponding to the cumulative total. Alternatively, an input device may be provided so that the display may sequentially display the cumulative total, and the total for each of the tariff bands. In a further alternative, the display may have a plurality of display fields, so that the cumulative total and the tariff band totals may be displayed simultaneously.
  • the correlation module 23 may store a correlation between the number of pulses in a clock interval and an instantaneous flow rate, and the meter may display the instantaneous flow rate as well as or instead of the cumulative total volume.
  • the correlation module may store a correlation between the number of pulses in a clock interval and the volume of water flowing in that interval, and the processor may calculate an instantaneous flow rate from the length of the clock interval and the volume of water flowing in the clock interval.
  • the meter circuitry may optionally also include a transceiver circuit 26, to allow remote reading of the values stored in the total memory module.
  • the transceiver circuit 26 shown in figure 4 may be a radio transceiver, or alternatively the circuit board may include a modem connection for communication via a telephone line.
  • the meter circuitry may optionally also include an input/output device 24 such as an RS232 port or other electrical connection accessible via an opening 15 in the housing 1 to enable the meter to be read directly without an operator having to read the display and then enter the totals via a keyboard.
  • the total memory module 22 may also store an identification number unique to the meter, and which is attached to the data read from the total memory.
  • the input/output device 24 may alternatively be a keypad mounted to the housing 1.
  • the power supply for the electronic circuitry is preferably derived from batteries 14 contained within the housing 1, most preferably attached to the circuit board 12. Where the meter is mounted in an exposed location, rechargeable batteries may be used and solar panels may be provided to charge the batteries during hours of sunshine.
  • a secondary turbine may be provided downstream of the Pelton wheel 7 or turbine, the secondary turbine driving an alternator or generator to provide power for the metering circuitry.
  • an axial flow turbine may be mounted in the chamber 8 with its rotation axis substantially parallel to the length of the passage 4 and spaced upwardly from the centerline of the passage, so that water issuing from the orifice 6 will impinge on the lower blades of the turbine and cause it to turn, while the upper blades of the turbine pass close to the sensing coil to provide the sensing input for the processor.
  • the meter described and illustrated is oriented with its passage 4 horizontal and positional below the housing 1. It is to be understood that the meter may be mounted in any orientation, such as with the passage 4 vertical or inclined, and the housing may be above, below, or to one side of the passage 4.
  • the Pelton wheel or turbine is preferably manufactured to have a density close to that of water, in order to reduce bearing friction to a minimum.
  • the material for the Pelton wheel or turbine and its bearings is preferably selected so as to be lubricated by water.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measuring Volume Flow (AREA)

Abstract

L'invention concerne un mètre permettant de mesurer l'écoulement d'un liquide. Ce mètre comprend un passage (4) dans lequel le liquide peut s'écouler, un élément rotatif (7) monté de manière à s'étendre, au moins partiellement, dans ledit passage (4), de manière être pouvoir être tourné par l'écoulement du liquide dans le passage, des moyens de détection électromagnétiques servant à détecter une rotation de l'élément rotatif, des moyens de détermination permettant de déterminer le taux d'écoulement du liquide dans le passage en fonction de la rotation détectée, ainsi que des moyens d'affichage (13) servant à afficher des informations relatives au taux d'écoulement déterminé. De préférence, le passage est pourvu d'un orifice (6) de dimensions prédéterminées et placé en amont de l'élément rotatif.
PCT/GB2001/002879 2000-06-27 2001-06-27 Debitmetre pour liquides WO2002001164A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001266198A AU2001266198A1 (en) 2000-06-27 2001-06-27 Flow meter for liquids

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0015535A GB0015535D0 (en) 2000-06-27 2000-06-27 Electronic water meter
GB0015535.8 2000-06-27

Publications (1)

Publication Number Publication Date
WO2002001164A1 true WO2002001164A1 (fr) 2002-01-03

Family

ID=9894345

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/002879 WO2002001164A1 (fr) 2000-06-27 2001-06-27 Debitmetre pour liquides

Country Status (3)

Country Link
AU (1) AU2001266198A1 (fr)
GB (1) GB0015535D0 (fr)
WO (1) WO2002001164A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003093772A1 (fr) * 2002-05-06 2003-11-13 Elster Contatori Debitmetre du type a ailettes
EP1639323A4 (fr) * 2003-06-13 2007-10-03 Arad Measuring Technologies Lt Indicateur de compteur et lecteur de compteur a distance utilisant un moteur pas a pas
EP2040044A1 (fr) * 2007-09-18 2009-03-25 Actaris SAS Procédé de fabrication d'un carter de compteur à détection magnétique et carter ainsi obtenu
WO2009147691A1 (fr) * 2008-06-05 2009-12-10 Miriam Surro Débit-mètre autonome relié à une unité centrale par une liaison sans fil
ITMO20080216A1 (it) * 2008-08-07 2010-02-08 Hasley Plastic Technology S R L Misuratore di portata volumetrico.
CN106932046A (zh) * 2015-12-31 2017-07-07 无锡水表有限责任公司 一种斜面可旋转式水表

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2616323A1 (de) * 1976-04-14 1977-10-27 Kueppers Karl Durchflussmessgeraet, insbesondere fuer kleine und kleinste durchflussmengen
US4132981A (en) * 1976-10-21 1979-01-02 Rockwell International Corporation Self-powered system for measuring and storing consumption of utility meter
CH627359A5 (en) * 1978-02-22 1982-01-15 Schiller Alfred Spirometer for determination of the respiratory time volume
US4404860A (en) * 1980-02-01 1983-09-20 Sed Systems Inc. Flow rate sensor
US4887469A (en) * 1988-05-11 1989-12-19 Hydro-Craft, Inc. High accuracy turbine flowmeter with optical sensor
US5111407A (en) * 1989-08-25 1992-05-05 Arad Ltd. System for measuring and recording a utility consumption
DE4427413A1 (de) * 1994-08-03 1996-02-15 Stadtwerke Wolfsburg Ag Volumenmeßgerät
US5721383A (en) * 1995-11-20 1998-02-24 Water Savers, Inc. Flow meter system and method of using same
US5892158A (en) * 1995-11-20 1999-04-06 Watersavers, Inc. Method for installing a flow meter system and flow meter apparatus therefor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2616323A1 (de) * 1976-04-14 1977-10-27 Kueppers Karl Durchflussmessgeraet, insbesondere fuer kleine und kleinste durchflussmengen
US4132981A (en) * 1976-10-21 1979-01-02 Rockwell International Corporation Self-powered system for measuring and storing consumption of utility meter
CH627359A5 (en) * 1978-02-22 1982-01-15 Schiller Alfred Spirometer for determination of the respiratory time volume
US4404860A (en) * 1980-02-01 1983-09-20 Sed Systems Inc. Flow rate sensor
US4887469A (en) * 1988-05-11 1989-12-19 Hydro-Craft, Inc. High accuracy turbine flowmeter with optical sensor
US5111407A (en) * 1989-08-25 1992-05-05 Arad Ltd. System for measuring and recording a utility consumption
DE4427413A1 (de) * 1994-08-03 1996-02-15 Stadtwerke Wolfsburg Ag Volumenmeßgerät
US5721383A (en) * 1995-11-20 1998-02-24 Water Savers, Inc. Flow meter system and method of using same
US5892158A (en) * 1995-11-20 1999-04-06 Watersavers, Inc. Method for installing a flow meter system and flow meter apparatus therefor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003093772A1 (fr) * 2002-05-06 2003-11-13 Elster Contatori Debitmetre du type a ailettes
EP1639323A4 (fr) * 2003-06-13 2007-10-03 Arad Measuring Technologies Lt Indicateur de compteur et lecteur de compteur a distance utilisant un moteur pas a pas
US7775422B2 (en) 2003-06-13 2010-08-17 Arad Measuring Technologies Ltd. Meter register and remote meter reader utilizing a stepper motor
US8157160B2 (en) 2003-06-13 2012-04-17 Arad Measuring Technologies Ltd. Meter register and remote meter reader utilizing a stepper motor
US8448845B2 (en) 2003-06-13 2013-05-28 Arad Measuring Technologies Ltd. Meter register and remote meter reader utilizing a stepper motor
EP2040044A1 (fr) * 2007-09-18 2009-03-25 Actaris SAS Procédé de fabrication d'un carter de compteur à détection magnétique et carter ainsi obtenu
EP2040043A1 (fr) * 2007-09-18 2009-03-25 Actaris SAS Procédé de fabrication d'un carter de compteur à detection magnétique et carter ainsi obtenu
WO2009147691A1 (fr) * 2008-06-05 2009-12-10 Miriam Surro Débit-mètre autonome relié à une unité centrale par une liaison sans fil
ITMO20080216A1 (it) * 2008-08-07 2010-02-08 Hasley Plastic Technology S R L Misuratore di portata volumetrico.
CN106932046A (zh) * 2015-12-31 2017-07-07 无锡水表有限责任公司 一种斜面可旋转式水表

Also Published As

Publication number Publication date
AU2001266198A1 (en) 2002-01-08
GB0015535D0 (en) 2000-08-16

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