WO2006091107A1 - Commutateur magnetique pour mesure de niveau, appareil de mesure de niveau, et son utilisation - Google Patents

Commutateur magnetique pour mesure de niveau, appareil de mesure de niveau, et son utilisation Download PDF

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Publication number
WO2006091107A1
WO2006091107A1 PCT/NO2006/000071 NO2006000071W WO2006091107A1 WO 2006091107 A1 WO2006091107 A1 WO 2006091107A1 NO 2006000071 W NO2006000071 W NO 2006000071W WO 2006091107 A1 WO2006091107 A1 WO 2006091107A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
float
magnetic switch
hollow space
measuring device
Prior art date
Application number
PCT/NO2006/000071
Other languages
English (en)
Inventor
Jan Gismervik
Original Assignee
Jan Gismervik
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 Jan Gismervik filed Critical Jan Gismervik
Priority to CN2006800061348A priority Critical patent/CN101142464B/zh
Publication of WO2006091107A1 publication Critical patent/WO2006091107A1/fr

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
    • G01F23/64—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 of the free float type without mechanical transmission elements
    • G01F23/72—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 of the free float type without mechanical transmission elements using magnetically actuated indicating means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/02—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding actuated by movement of a float carrying a magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/60—Auxiliary means structurally associated with the switch for cleaning or lubricating contact-making surfaces

Definitions

  • Magnetic switch for level measurement, level meter, and use thereof Magnetic switch for level measurement, level meter, and use thereof.
  • the present invention relates to a magnetic switch to be used in level measurements of fluid or liquid gas in a tank, such as a fuel tank in a vehicle, storage tank or the like, comprising a housing with an internal, closed, hollow space that extends in the longitudinal direction in the housing, where a body is arranged at a first end of the hollow space adapted to be moved in the hollow space by mutual magnetic influence of an external movable float, and where at least two contact terminals at the other end of the hollow space are arranged to provide a closed contact with said body.
  • a level measuring device with a number of magnetic switches, and use thereof, is also disclosed.
  • a number of such housings can be placed after each other in a tube, where the magnetic field can be such that two subsequent switches are closed at the same time to provide a stepwise indication.
  • the switches one and two are closed simultaneously and thereafter, the switches two and three, then switches three and four, etc.
  • US 6,571 ,626 disclose a level measuring device for use in fuel tanks, with an elongated body comprising a number of magnetic switches, i.e. wedge switches/reed switches, which are under influence of a magnet float. A resistor between each magnetic switch makes it possible to read the current as a function of fluid level, assumed a constant voltage source. Said switches are not two-state.
  • Reed contacts which are normally used to make a circuit where a resistance area in ohm is created, and which are used in tanks for level measurements or to drive a fuel measuring gauge.
  • Reed contacts and resistors it is common that these are placed on a print card that is placed inside a pipe.
  • a float which has one or more magnets inserted, glides externally on the pipe, and the float glides up and down along the pipe and engages or disengages the Reed contacts. As the float passes the Reed contact, this is engaged, but is disengaged again as soon as the float has passed going up.
  • the invention thereby also simplifies the manufacturing possibilities and associated costs. Furthermore, the present invention makes a more accurate measurement in the tank possible, and can in particular be used in selected areas, for example to indicate when the tank is nearly empty. When the tank is full, or also half full, the same accuracy is not necessarily as interesting, for example, for the driver of a vehicle, in other areas, it can of course be important with a high degree of accuracy over the whole measuring range.
  • the magnetic connection between said body and the contact terminals can be provided by a permanent holding magnet.
  • the permanent holding magnet is arranged adjacent the contact terminals at the other end of the hollow space, and preferably between said contact terminals.
  • the housing can comprise a cover to close said hollow space, the permanent holding magnet and the contact terminals can be arranged to the cover.
  • the permanent holding magnet is arranged in the bottom the switch.
  • the permanent holding magnet can be made up of the contact terminals at the other end of the hollow space.
  • the first end of the hollow space can contain contact oil.
  • a level measuring device as disclosed in independent claim 12, in that the level measuring device comprises an elongated body, such as a print card, comprising a number of connected resistors, in where a separate magnetic switch, according to above, is connected in a number of nodes between said resistor and an end of the resistor series, and that at least one resistor is arranged between each switch to provide closed circuit when one or more of said switches are closed, and where each magnetic switch is adapted to be driven individually.
  • Preferred alternative embodiments are disclosed in the dependent claims 13- 15.
  • the magnetic switches can be arranged at different distances at different areas of the elongated body, arranged to provide different, but sufficient and intended, accuracy of the level measurements.
  • a magnetic float can be arranged about the elongated body, where the magnetic float is adapted to be moved by fluid or liquid gas in the tank. Further, the housing of the magnetic switch can be placed on the level measuring device so that the elongated hollow space runs vertically, or at a reasonable angle, in the longitudinal direction of the level measuring device.
  • the invention also regards use of a magnetic switch and a level measuring device as disclosed in claims 16 and 17, in which the magnetic switch is included in a tank measuring device for a vehicle, a boat, a stationary fuel tank, etc.
  • the level measuring device is arranged in the tank of a vehicle, a boat, a stationary fuel tank, etc., and is adapted to measure the fuel level in the tank and is included in a tank measuring device.
  • Figure 2 shows a level measuring device according to the invention.
  • the magnetic switch 10 comprises a housing 12 with an internal, closed, hollow space 24 that extends in the longitudinal direction in the housing 12, where a steel ball 16 is arranged in the first end 24a of the hollow space 24, set up to be moved in the hollow space 24 under the influence of an external, magnetic, floating magnet 18 associated with the level measuring device 30, and where at least two contact terminals 20a,20b are arranged at the other end 24b of the hollow space 24, set up to provide a closed contact with said steel ball 16.
  • the contact terminals are preferably shaped in an oblong form and stretch down into the hollow space 24.
  • steel ball is used in this description, it must be clear that other magnetic bodies can also be used, as long as they provide the same characteristics. Examples can be a rectangular body, a circular-cylindrical body, etc., that is arranged in a corresponding way to the steel ball in said hollow space in the housing.
  • the magnetic connection between the body and the float can be provide in that said body is magnetic and the float is or comprises a metallic component, such as a ring of iron.
  • the magnetic connection between said body and the float can be provided in that said body is or comprises a metallic component, such as a steel ball or iron ball, and that the float is magnetic.
  • said body can be magnetic and that the float and the contact terminals are or comprises a metallic component, such as iron.
  • a permanent holding magnet 22 is arranged at the other end 24b of the hollow space 24, set up to maintain contact with the contact terminals 20a,20b for the steel ball 16 after the magnetic float 18 has passed upward. Furthermore the permanent holding magnet 22 is set up to release the steel ball 16 when the magnetic float 18 passes down, i.e. the magnetic force in the holding magnet must not be so strong that the steel ball is prevented from being released, but at the same time the magnetic force in the holding magnet must be so strong that the steel ball does not fall down by itself, or by other external influences such as, for example, the tank, where the magnetic switch is placed, being shaken. The steel ball 16 is thereby pulled down due to the magnetic force in the floating magnet 18 being stronger than the magnetic force in the holding magnet 22.
  • the permanent holding magnet 22 is arranged adjoining the contact terminals 20a,20b at the other end 24b of the hollow space 24, and preferably between said contact terminals 20a,20b.
  • the contact terminals themselves can constitute a holding magnet, whereby there is no need for a separate holding magnet.
  • the first end 24a of the hollow space 24 can encompass contact oil in which the steel ball is lying when it is not active.
  • the housing 12 can comprise a cover 26 to close up said hollow space 24, such that fluid can not enter the housing of the magnetic switch.
  • the permanent magnet 22 and the contact terminals 20a,20b can be arranged to the cover 26, alternatively in another suitable way.
  • a float 18 glides externally on the pipe, dependent on the level of fluid in the tank, and which has one or more magnets inserted, and the float 18 consequently glides up and down along the pipe and engages or disengages the magnetic switches 10. As the float 18 passes the magnetic contact 10, this is laid in, and remains lying in after the float 18 has passed upwards. The contact is first broken when the float 18 is moved downwards again and pulls the steel ball 16 along down to its original position at the lower part 24a of the hollow space 24.
  • the housing 12 of the magnetic switch 10 is placed on the level measuring device 30 so that the elongated hollow space 24 extends vertically, or if necessary because of space limitations, at a reasonable angle in the longitudinal direction of the level measuring device.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

La présente invention concerne un commutateur magnétique (10) destiné à être utilisé dans des mesures de niveau de fluide ou gaz liquide dans un réservoir, tel qu’un réservoir de carburant dans un véhicule, réservoir de stockage ou analogue, comprenant un boîtier (12) avec un espace interne creux et fermé (24) qui s’étend dans la direction longitudinale dans le boîtier (12), où est agencé un corps (16) au niveau d’une première extrémité (24a) de l’espace creux (24) adapté pour être déplacé dans l’espace creux (24) par influence magnétique mutuelle d’un flotteur mobile externe (18), et où sont agencées au moins deux bornes de contact (20a, 20b) au niveau de l’autre extrémité (24b) de l’espace creux (24) pour fournir un contact fermé avec ledit corps (16), caractérisé en ce que le contact entre ledit corps et les bornes de contact (20a, 20b) est maintenu après que le flotteur (18) s’est déplacé vers le haut, par une connexion d’aimant, et que le contact entre les bornes de contact (20a, 20b) et ledit corps (16) est rompu lorsque le flotteur s’est déplacé vers le bas, ledit corps (16) étant tiré vers le bas lorsque la force magnétique entre le flotteur (18) et ledit corps (16) est supérieure à la connexion magnétique entre les bornes de contact (20a, 20b) et ledit corps (16). Un dispositif de mesure de niveau (30) comportant plusieurs commutateurs magnétiques (10) et son utilisation sont également décrits.
PCT/NO2006/000071 2005-02-28 2006-02-22 Commutateur magnetique pour mesure de niveau, appareil de mesure de niveau, et son utilisation WO2006091107A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2006800061348A CN101142464B (zh) 2005-02-28 2006-02-22 用于液位测量的磁性开关、液位计及其用途

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20051083A NO322352B1 (no) 2005-02-28 2005-02-28 Magnetisk bryter for nivamaling, nivamaler og anvendelse derav
NO20051083 2005-02-28

Publications (1)

Publication Number Publication Date
WO2006091107A1 true WO2006091107A1 (fr) 2006-08-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2006/000071 WO2006091107A1 (fr) 2005-02-28 2006-02-22 Commutateur magnetique pour mesure de niveau, appareil de mesure de niveau, et son utilisation

Country Status (3)

Country Link
CN (1) CN101142464B (fr)
NO (1) NO322352B1 (fr)
WO (1) WO2006091107A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104848921A (zh) * 2015-04-08 2015-08-19 昆明理工大学 一种磁性液位计
CN105745516A (zh) * 2016-02-18 2016-07-06 东莞正扬电子机械有限公司 液位检测方法及装置
CN109540266A (zh) * 2019-01-17 2019-03-29 北京锐达仪表有限公司 一种磁致伸缩液位计及液位测量方法
FR3104253A1 (fr) * 2019-12-09 2021-06-11 Safran Aircraft Engines Capteur, système et procédé de détection d’un niveau de liquide dans un réservoir
US11904196B2 (en) 2018-11-30 2024-02-20 Carrier Corporation Magnetic trap suppression tank level sensor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10955280B2 (en) 2015-11-30 2021-03-23 Bourns, Inc. Detecting fluid characteristics via a float
CN105865581A (zh) * 2016-05-30 2016-08-17 国家电网公司 液位计
CN106197619A (zh) * 2016-07-12 2016-12-07 苏州依斯倍环保装备科技有限公司 液位监测装置
JP6561968B2 (ja) * 2016-11-04 2019-08-21 トヨタ自動車株式会社 燃料タンク
WO2018085987A1 (fr) * 2016-11-08 2018-05-17 Hamlin Electronics (Suzhou) Co. Ltd. Capteur d'échelle de résistance unipolaire
CN107731625A (zh) * 2017-10-17 2018-02-23 国网山东省电力公司青岛供电公司 一种瓦斯继电器
CN111103039B (zh) * 2019-12-31 2021-05-04 赛卓电子科技（上海）有限公司 油箱油位传感器
CN111307027B (zh) * 2020-02-28 2021-10-29 北京纳米能源与系统研究所 机电一体式自供能位置传感装置及流体流量传感器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103562A (en) * 1963-09-10 Magnetic ball switch for electric circuits
US5347864A (en) * 1993-04-12 1994-09-20 Electrolab, Inc. Liquid level measuring apparatus
US6571626B1 (en) * 2001-10-11 2003-06-03 Walbro Corporation Fuel level sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103562A (en) * 1963-09-10 Magnetic ball switch for electric circuits
US5347864A (en) * 1993-04-12 1994-09-20 Electrolab, Inc. Liquid level measuring apparatus
US6571626B1 (en) * 2001-10-11 2003-06-03 Walbro Corporation Fuel level sensor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104848921A (zh) * 2015-04-08 2015-08-19 昆明理工大学 一种磁性液位计
CN105745516A (zh) * 2016-02-18 2016-07-06 东莞正扬电子机械有限公司 液位检测方法及装置
WO2017139960A1 (fr) * 2016-02-18 2017-08-24 东莞正扬电子机械有限公司 Procédé et appareil de détection du niveau d'un fluide
US11904196B2 (en) 2018-11-30 2024-02-20 Carrier Corporation Magnetic trap suppression tank level sensor
CN109540266A (zh) * 2019-01-17 2019-03-29 北京锐达仪表有限公司 一种磁致伸缩液位计及液位测量方法
CN109540266B (zh) * 2019-01-17 2023-11-07 北京锐达仪表有限公司 一种磁致伸缩液位计及液位测量方法
FR3104253A1 (fr) * 2019-12-09 2021-06-11 Safran Aircraft Engines Capteur, système et procédé de détection d’un niveau de liquide dans un réservoir

Also Published As

Publication number Publication date
CN101142464A (zh) 2008-03-12
NO322352B1 (no) 2006-09-18
NO20051083D0 (no) 2005-02-28
CN101142464B (zh) 2010-08-11

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