EP2300780A1 - Capteur de position - Google Patents

Capteur de position

Info

Publication number
EP2300780A1
EP2300780A1 EP09780150A EP09780150A EP2300780A1 EP 2300780 A1 EP2300780 A1 EP 2300780A1 EP 09780150 A EP09780150 A EP 09780150A EP 09780150 A EP09780150 A EP 09780150A EP 2300780 A1 EP2300780 A1 EP 2300780A1
Authority
EP
European Patent Office
Prior art keywords
position sensor
sensor according
track
elastic film
contact means
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Withdrawn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
EP09780150A
Other languages
German (de)
English (en)
Inventor
Petr Tesar
David Sebek
Jan Veselik
Roland Manur
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2300780A1 publication Critical patent/EP2300780A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/02—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means
    • G01D5/06—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means acting through a wall or enclosure, e.g. by bellows, by magnetic coupling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/16—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
    • G01D5/165—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance by relative movement of a point of contact or actuation and a resistive track
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/14—Adjustable resistors adjustable by auxiliary driving means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/28—Adjustable resistors the contact rocking or rolling along resistive element or taps

Definitions

  • the invention is based on a position sensor according to the preamble of the main claim.
  • a magnetic position sensor from DE 196 48 539 A1 is already known, having a resistance path formed on a carrier, a conductor track spaced apart from the resistance path, a movably mounted contact means for producing a local electrical connection between the resistance path and the conductor track.
  • the contact means is a magnet which attracts individual segments of the conductor track to the resistance path and in this way closes the contact with the resistance path.
  • the disadvantage is that the manufacturing costs for the position sensor are comparatively high.
  • the position sensor according to the invention with the characterizing features of the main claim has the advantage that the position sensor is simplified and thereby the manufacturing cost can be reduced by the conductor is formed on an elastic film and by the contact means is movably mounted on the conductor track and so on the conductor track acts to create a local contact with the resistance path.
  • a frame-shaped spacer is arranged between the carrier with the resistance path and the elastic film with the conductor track, which has a recess in the region of the resistance path and the conductor track, above the the elastic film is stretched.
  • the contact means can press down the elastic film locally on the resistance path, so that a local contact between the conductor track and the resistance path is formed.
  • the elastic film is glued to the spacer, soldered or welded, since this type of attachment is particularly simple and inexpensive.
  • the elastic film is a film made of polyimide or polyester, since these materials ensure a high elasticity.
  • the polyester film has a coating of glass.
  • the contact means is a ball or a cylindrical or conical roller and is made of a magnetized or magnetic material, since the contact means can be magnetically coupled in this way with a magnetic element and can be moved by movement of the magnetic element via the conductor track ,
  • the carrier, the elastic film, the spacer and the contact means are sealed in a sensor housing, wherein the contact means in a guide of the sensor housing is translationally movable, since in this way an encapsulated sensor is achieved.
  • a magnetic element is provided which is magnetically coupled to the contact means.
  • the magnetic coupling allows a fully enclosed sensor housing. There is no implementation of a mechanical coupling, whereby the sensor housing is only static seal.
  • the position sensor is advantageous to use as a tank level sensor, since tank level sensors for the fuel tank should be fuel-tight, in order to exclude the harmful influence of the fuel on the resistance path and the conductor and their contacting. It is advantageous if the conductor is made of an electrically conductive paste, since the electrical layout can be easily manufactured in this way in a printing process.
  • the electrically conductive paste consists of a polymer material, since in this way a high elasticity of the applied on the elastic film conductor track is achieved.
  • the electrically conductive paste is filled with electrically conductive particles.
  • the electrically conductive particles consist of silver and / or copper. In this way a good electrical conductivity is ensured.
  • the conductor track on the surface is provided with a corrosion protection layer, since in this way a good signal quality over the life of the sensor is ensured.
  • the diffusion barrier layer consists of nickel and gold is applied as a corrosion protection layer, since in this way a good signal quality and a long life of the sensor is achieved.
  • the electrically conductive particles consist of nickel or aluminum and are coated with gold, since in this way the separate corrosion protection layer on the conductor can be dispensed with.
  • Fig.l shows a sectional view of the position sensor according to the invention
  • Figure 2 is an exploded view of the position sensor according to the invention
  • Figure 3 is an overall view of the position sensor according to the invention.
  • Fig.l shows a sectional view of a position sensor according to the invention, which is for example a magnetic position sensor.
  • the position sensor has an electrically insulating carrier 1, on which a layer-shaped resistance path 2 is applied.
  • the resistance track 2 is arcuate, but may also be rectilinear or have any other shape.
  • the resistance track 2 has a predetermined electrical resistance.
  • the resistance track 2 is electrically connected to an electrical connection 4 via a layered connection track 3.
  • the resistance track 2 and the connecting track 3 of the carrier 1 are applied to the carrier 1 by means of a so-called thick-film or thin-film technique or in some other way.
  • a conductor 5 is provided, whose electrical resistance corresponds approximately to that of the connection track 3, but is much lower than the electrical resistance of the resistance path 2.
  • the conductor 5 overlaps in the Projection with the resistance track 2 or covers them substantially.
  • the conductor track 5 is electrically connected to an electrical connection 10 via a layered connection track 9.
  • a movably arranged contact means 6 establishes an electrical contact between the resistance track 2 and the conductor track 5 locally.
  • the magnetic position sensor is a potentiometer which divides an input voltage into two variable partial voltages or a total resistance into two partial resistors.
  • the partial voltages or partial resistances result depending on the position of the movable contact means 6.
  • the conductor track 5 is formed on an elastic film 12 and that the contact means 6 is movably mounted on the elastic film 12 along the conductor track 5 and acts on the conductor track 5 such that a local contact with the resistance track 2 is formed.
  • the contact means 6 can gravimetrisch, ie act with its own weight, by means of a magnetic force and / or by means of a spring on the conductor 5 that a local contact with the resistance path 2 is formed.
  • the contact means 6 is a ball or a cylindrical or conical roller which rolls on the elastic film 12.
  • the contact means 6 is made of a magnetized or magnetizable or magnetic material, for example of steel.
  • the contact means 6 can of course also be a permanent magnet.
  • a frame-shaped spacer 13 is arranged, which in the region of
  • Resistance track 2 and the conductor track 5 has a continuous recess 14, over which the elastic film 12 is clamped.
  • the elastic film 12 is glued to the spacer 13, soldered or welded.
  • the elastic film 12 is made of polyimide or polyester, for example.
  • the conductor 5 is made of an electrically conductive paste, which consists of a polymer material, such as epoxy resin. By the polymer, a high elasticity of the applied on the elastic film conductor 5 is achieved.
  • the paste is filled with electrically conductive particles to adjust electrical conductivity.
  • the electrically conductive particles consist of silver and / or copper.
  • a corrosion protection layer may be applied to ensure a good signal quality over the life of the sensor.
  • a diffusion barrier layer may be provided, which is a diffusion of material of the conductive
  • the diffusion barrier layer can be made of nickel, for example, and the corrosion protection layer of gold.
  • the electrically conductive particles made of nickel or aluminum and are coated with gold. This makes it possible to dispense with the separate corrosion protection layer on the conductor track and on the diffusion protection layer.
  • the conductor track 5 consists of a compact electrically conductive layer, which is a metal foil and with a higher mechanical Resilience can be achieved.
  • the metal foil is applied by lamination.
  • the layout of the trace can be made by etching the metal foil.
  • the applied metal foil can not only form the trace, but also other functions, e.g. that of a spacer or the provision of a suitable solder geometry, take over and have integrated into itself.
  • the carrier 1, the elastic film 12, the spacer 13 and the contact means 6 are sealed in a sensor housing 15, wherein the contact means 6 is mounted to be translationally movable in a guide 16 of the sensor housing 15.
  • the guide 16 extends in the direction of the resistance path 2.
  • a magnetic element 20 is provided, which is magnetically coupled to the contact means 6.
  • the magnetic element 20 is mechanically coupled to a linearly or rotatably mounted device whose position is to be determined, for example with a float.
  • the float is rotatably mounted for example via a lever arm.
  • On the rotatably mounted float arm and the magnetic element 20 is attached.
  • the contact means 6 is moved, whereby the position of the electrical connection between the conductor track 5 and the resistance track 2 is changed or shifted, so that sets a different partial electrical resistance or another partial voltage.
  • FIG. 2 shows an exploded view of the magnetic position sensor according to the invention. 2, the parts which are identical or functionally identical to the sensor according to FIG. 1 are identified by the same reference numerals.
  • 3 shows an overall view of the magnetic according to the invention

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

Il existe déjà des capteurs de position magnétiques présentant une piste résistive formée sur un support, une piste conductrice placée à distance de la piste résistive, ainsi qu'un moyen de contact monté mobile pour établir une liaison électrique locale entre la piste résistive et la piste conductrice. Le moyen de contact est un aimant qui attire des segments individuels de la piste conductrice contre la piste résistive et établit ainsi le contact avec la piste résistive. L'inconvénient de ce type de capteur de position est qu'il présente un coût de fabrication relativement élevé. Le capteur de position selon l'invention présente un coût de fabrication réduit. À cet effet, la piste conductrice (5) est formée sur un film élastique (12) et le moyen de contact (6) est monté sur ce film élastique (12) de façon à pouvoir se déplacer le long de la piste conductrice (5), ledit moyen de contact (6) agissant sur la piste conductrice (5) de telle sorte qu'un contact local soit établi avec la piste résistive (2).
EP09780150A 2008-07-09 2009-07-03 Capteur de position Withdrawn EP2300780A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008040289 2008-07-09
PCT/EP2009/058448 WO2010003907A1 (fr) 2008-07-09 2009-07-03 Capteur de position
DE102009027461A DE102009027461A1 (de) 2008-07-09 2009-07-03 Positionssensor

Publications (1)

Publication Number Publication Date
EP2300780A1 true EP2300780A1 (fr) 2011-03-30

Family

ID=41413011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09780150A Withdrawn EP2300780A1 (fr) 2008-07-09 2009-07-03 Capteur de position

Country Status (5)

Country Link
EP (1) EP2300780A1 (fr)
CN (1) CN102089627A (fr)
BR (1) BRPI0915610A2 (fr)
DE (1) DE102009027461A1 (fr)
WO (2) WO2010003732A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112594483A (zh) * 2021-01-26 2021-04-02 太原理工大学 一种自动调平装置及方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010048115A1 (de) * 2010-09-28 2012-03-29 Heinz Gross Verfahren zur Messung und Regelung der Wanddicke von Hohlprofilen
DE202011103117U1 (de) 2011-07-13 2011-11-07 Hoffmann + Krippner Gmbh Foliensensor
DE102012201466A1 (de) 2012-02-01 2013-08-01 Robert Bosch Gmbh Tankstandsgeber
DE202014103242U1 (de) 2014-07-15 2014-10-02 Hoffmann + Krippner Gmbh Magnetsensor
WO2019078021A1 (fr) * 2017-10-18 2019-04-25 三菱電機株式会社 Appareil de brasage et procédé de brasage
JP7111457B2 (ja) * 2017-10-27 2022-08-02 新光電気工業株式会社 半導体装置及びその製造方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457368A (en) * 1993-03-09 1995-10-10 University Of Utah Research Foundation Mechanical/electrical displacement transducer
DE19648539C2 (de) * 1996-11-25 2000-04-13 Mannesmann Vdo Ag Passiver magnetischer Positionssensor
JPH10223413A (ja) * 1997-02-04 1998-08-21 Nok Corp ポテンショメータ
DE10200867A1 (de) * 2002-01-11 2003-07-31 Bosch Gmbh Robert Flexibles Kontaktelement zur berührungslosen Signalerfassung
DE10329044B4 (de) * 2003-06-27 2006-04-20 Rexroth Mecman Gmbh Einrichtung zur Ermittlung der aktuellen Stellung eines Antriebsgliedes entlang des Hubwegs oder Drehwinkels, insbesondere bei einem druckmittelbetriebenen Linear- bzw. Drehantrieb
DE102007023530A1 (de) * 2007-05-18 2008-11-20 Metallux Ag Positionssensor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010003907A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112594483A (zh) * 2021-01-26 2021-04-02 太原理工大学 一种自动调平装置及方法
CN112594483B (zh) * 2021-01-26 2023-03-24 太原理工大学 一种自动调平装置及方法

Also Published As

Publication number Publication date
BRPI0915610A2 (pt) 2019-09-24
WO2010003907A1 (fr) 2010-01-14
CN102089627A (zh) 2011-06-08
WO2010003732A3 (fr) 2010-06-17
DE102009027461A1 (de) 2010-01-14
WO2010003732A2 (fr) 2010-01-14

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