EP1327123A1 - Jauge comprenant un capteur magnetoresistant destinee a un systeme de mesure de niveau de liquide a distance sur des reservoirs - Google Patents

Jauge comprenant un capteur magnetoresistant destinee a un systeme de mesure de niveau de liquide a distance sur des reservoirs

Info

Publication number
EP1327123A1
EP1327123A1 EP00970345A EP00970345A EP1327123A1 EP 1327123 A1 EP1327123 A1 EP 1327123A1 EP 00970345 A EP00970345 A EP 00970345A EP 00970345 A EP00970345 A EP 00970345A EP 1327123 A1 EP1327123 A1 EP 1327123A1
Authority
EP
European Patent Office
Prior art keywords
gauge
reservoir
magneto
liquid
measuring
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.)
Withdrawn
Application number
EP00970345A
Other languages
German (de)
English (en)
Inventor
José Basilos Portas Salgado SIMOES
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.)
Isa-Instrumentacao E Sistemas De Automacao Lda
Original Assignee
Isa-Instrumentacao E Sistemas De Automacao Lda
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 Isa-Instrumentacao E Sistemas De Automacao Lda filed Critical Isa-Instrumentacao E Sistemas De Automacao Lda
Publication of EP1327123A1 publication Critical patent/EP1327123A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G01F23/38—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/80—Arrangements for signal processing
    • G01F23/802—Particular electronic circuits for digital processing equipment

Definitions

  • the present invention refers to a measuring instrument (or a gauge), (Fig.1) and (Fig.2), used for distance/remote determinations of the volume level of liquids or fluids stored in liquid reservoirs or deposits, that can have several applications.
  • a measuring instrument or a gauge
  • Fig.1 and Fig.2 used for distance/remote determinations of the volume level of liquids or fluids stored in liquid reservoirs or deposits, that can have several applications.
  • One of these applications may be the production, storage or fuel ditsribution in its liquid state, at an Industrial and/or Commercial Scale.
  • the present invention relates to liquid level measuring instruments.
  • a common type of instrument/ measuring sensor is the buoy / float system. This system introduces as a "sensor" element, in the first place, a buoy that floats in the surface of the liquid to be measured. Connected to this buoy we can normally find other moving pieces/arms, that perform in sinchrony between that buoy's oscillations and the liquid level oscillations.
  • a magnet In the top of a beam connected to the buoy mechanism there is a magnet, that moves vertically and in rotation over its own axis, provoking a variation in the direction of the magnetic field.
  • magneto-resistive sensors are ideal for all types of contactless position (Like for example: Distance, speed, annular speed and sense of rotation) and for energy and electrical current measuring. These sensors ensure a functional reliability, by being permanently stable and without contact with other measuring parts. They can ensure such reliability, even under the worst climate and geophysical conditions, such as rain, dirt, high and low temperatures. These demonstrated capabilities prove the high importance and interest in the use of magneto-resistive sensors, in several industrial applications
  • the Gauge illustrated in the drawings consists in a gauge, (Fig.1), that attached by the already existing means, to the. coupling surface for liquid measuring instruments, [1], which is positioned on the upper and outer part of a liquid reservoir, [2], normally used for fuel or other liquid storage, (Fig.2), can convert in an electric signal remotely transmitted, the information related to the liquid level inside the reservoir, [2].
  • a buoy,[4] that in synchrony with its fluctuation movement, induces a magnet,[5], positioned in the top of a beam, to turn.
  • This beam is linked to a moving buoy mechanism,[4] and [6], placed within the reservoir wall, [2].
  • This Gauge uses "magneto-resistive" type-"GMR- Giant Magneto Resistive"-effect based sensors, [7], embodied in a resin or any other plastic material, according to the illustrated configuration, [7 a]. Those sensors, which positioned on the exterior part of a reservoir [9], are used to determine the direction of the magnetic field, provoked by the rotation of magnet [5] e [10] within that reservoir [2].
  • sensors,[7] that only measure the direction of the magnetic field, independently from its intensity, which makes the use and assembly of the gauge extremely simple.
  • This sensor's insensitivity to the intensity of the field permits that according to this conception, it still can be possible to place over this instrument, another already known localised measuring instrument, which contains another magnet which movement, will also be synchronised with that magnet placed within the reservoir. This movement will cause to move a pointer over a scale, providing the needed local visualisation.
  • the gauge may also use two crossed magneto-resistive sensors, positioned according to an 90.° angle.
  • the calculation of the field direction from the sensor's (or both sensors) resistence variation is made by a microcontroller with two analogic entries.
  • the same microcontroller may convert the measured angle in the correct percentage volume of liquid in the reservoir (then adapting to the geometry of this one).
  • This digital information in an electric signal due to be transmitted remotely can be made by any of the conventional means and namely by tension cable or current, by infrared, radio wave and others.
  • the functioning of this invention is protected / isolated from contacts and frictions with mobile parts, from component dislocations and oxidation. This helps it to become at the same time, more reliable, precise, with low maintenance costs and with greater utility and durability for distance verifications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

L'invention concerne une jauge, qui fixée sur une surface d'accouplement et destinée à des instruments de mesure de liquide (1), positionnée sur la partie supérieure et externe d'un réservoir de liquide (2), habituellement utilisé dans le stockage de carburant ou d'autres liquides, pouvant convertir en un signal électrique transmis à distance, les informations liées au niveau de liquide à l'intérieur du réservoir. Le réservoir lui-même contient déjà un dispositif de mesure complémentaire composé d'un mécanisme flottant et à aimant (2, 6). Cette jauge comprend des capteurs basés sur un effet « magnétorésistant » du type « GMR » (magnétorésistance géante) (7) utilisés en vue de déterminer la direction du champ magnétique, bien qu'il soit insensible à l'intensité de ce champ, provoquée par la rotation d'un aimant (5, 10) à l'intérieur de ce réservoir (2).
EP00970345A 2000-10-16 2000-10-16 Jauge comprenant un capteur magnetoresistant destinee a un systeme de mesure de niveau de liquide a distance sur des reservoirs Withdrawn EP1327123A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/PT2000/000011 WO2002033364A1 (fr) 2000-10-16 2000-10-16 Jauge comprenant un capteur magnetoresistant destinee a un systeme de mesure de niveau de liquide a distance sur des reservoirs

Publications (1)

Publication Number Publication Date
EP1327123A1 true EP1327123A1 (fr) 2003-07-16

Family

ID=20081541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00970345A Withdrawn EP1327123A1 (fr) 2000-10-16 2000-10-16 Jauge comprenant un capteur magnetoresistant destinee a un systeme de mesure de niveau de liquide a distance sur des reservoirs

Country Status (2)

Country Link
EP (1) EP1327123A1 (fr)
WO (1) WO2002033364A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1691178A1 (fr) * 2005-02-11 2006-08-16 Sztek Anstalt Capteur magnétique d'angle de rotation pour utilisation avec un détecteur de niveau de liquide
US7523660B2 (en) 2005-06-08 2009-04-28 Ecolab Inc. Oval gear meter
MXNL06000005A (es) * 2006-01-25 2006-04-05 Juan Oscar Rodroguez Medina Metodo, sistema y aparatos para medir el volumen de un liquido contenido en un tanque.
CN102003991A (zh) * 2010-10-23 2011-04-06 丹东通博电器(集团)有限公司 转动轴磁藕合式内浮球液位计
CN103278216A (zh) 2013-05-31 2013-09-04 江苏多维科技有限公司 液位传感器系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4752899A (en) * 1985-10-23 1988-06-21 Newman John W Condition monitoring system for locomotives
US4782699A (en) * 1986-11-17 1988-11-08 General Motors Corporation Pulsed fuel level indicating system
US4911011A (en) * 1988-11-01 1990-03-27 Rochester Gauges, Inc. Gauge with magnetically driven voltage divider
FR2717575A1 (fr) * 1994-03-17 1995-09-22 Simonny Roger Dispositif de mesure du niveau d'un liquide.
US5619560A (en) * 1995-06-05 1997-04-08 Scully Signal Company Residential fuel oil tank level reporting device
DE19802227A1 (de) * 1997-03-06 1998-09-17 Elektra Beckum Ag Tauchpumpe
US6089086A (en) * 1997-08-26 2000-07-18 Rochester Gauges, Inc. Liquid level gauge
IT1309352B1 (it) * 1999-03-31 2002-01-22 Areagas S R L Sistema per il controllo del livello di liquido contenuto nei serbatoigpl o simili.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0233364A1 *

Also Published As

Publication number Publication date
WO2002033364A1 (fr) 2002-04-25

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