EP1428230A1 - Potentiometre - Google Patents

Potentiometre

Info

Publication number
EP1428230A1
EP1428230A1 EP02747230A EP02747230A EP1428230A1 EP 1428230 A1 EP1428230 A1 EP 1428230A1 EP 02747230 A EP02747230 A EP 02747230A EP 02747230 A EP02747230 A EP 02747230A EP 1428230 A1 EP1428230 A1 EP 1428230A1
Authority
EP
European Patent Office
Prior art keywords
contact
grinding
potentiometer according
potentiometer
grinder
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Withdrawn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
EP02747230A
Other languages
German (de)
English (en)
Inventor
Reiner Schweinfurth
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 EP1428230A1 publication Critical patent/EP1428230A1/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Withdrawn legal-status Critical Current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
    • G01D5/12—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
    • G01D5/1655—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 more than one point of contact or actuation on one or more tracks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element

Definitions

  • the invention relates to a potentiometer of the type defined in the preamble of claim 1.
  • the grinder In a known potentiometer of this type (DE 196 24 780 A1), which is used as a position sensor for detecting the angular position of a throttle valve in the intake pipe of an internal combustion engine, the grinder has a carrier and two resilient grinding plates attached to it, each carrying a contact brush at the end which, in turn, make electrical contact with a resistance mat shark. Of the two concentrically arranged sliding tracks, one is connected at the end to two connecting terminals for applying a potentiometer voltage and the other
  • Grinding path is connected at one end to a measuring terminal to which a tapped from s' grinders potentiometer voltage is removable as a measure of the relative position of the grinder and the grinding path. Since the sliding track is fixed in a housing of a throttle valve connector and the grinder is connected in a rotationally fixed manner to the adjusting shaft for the throttle valve, the is on the Measuring terminal removed voltage a measure of the rotational position of the throttle valve.
  • the potentiometer according to the invention with the features of claim 1 has the advantage that the inventive construction of the contact element electrically contacting the sliding track from an electrically conductive core and a noble metal jacket, which usually reduces a high proportion of the noble metal used for electrical contacting, which is a
  • the ring surface of the noble metal jacket ensures that the noble metal that ensures good contact still lies on the grinding track.
  • the contact element is designed as a grinding wire which is fastened at its end facing away from the contact surface on a grinder arm of the grinder. This has the advantage that due to the Ede existing over the length of the grinding wire . lmetallmantei a reliable contact with low contact resistance can also be produced on the carrier side.
  • the grinding wire is angled so that the longer leg is attached to the carrier and the shorter leg has the contact surface.
  • This has the advantage that a contact force exerted on the contact surface by the wire itself is applied by the long leg of the angled contact wire, which ensures the electrical contact with the contact track.
  • the core of the grinding wire is made of spring wire, so that a resilient bias can be impressed on the grinding wire.
  • FIG. 1 shows a potentiometer in use as a position sensor or angle encoder for detecting the angle of rotation position of a rotating component
  • Fig. 2 excerpts a bottom view of the grinder of the
  • Fig. 4 shows a section of a grinding wire of the grinder of the
  • the potentiometer shown in the drawing serves as a position sensor for sensing the rotary setting of a rotating component.
  • a position sensor In motor vehicles, such a position sensor is used to detect the swivel angle of a throttle valve which is arranged in an intake duct of the internal combustion engine and which represents the rotating component.
  • a housing 10 accommodating the potentiometer is fastened to the so-called throttle valve connector of the intake duct, and the drive shaft for the throttle valve is coupled to the potentiometer.
  • the potentiometer has two slideways 11, 12, at least one of which is made of electrical resistance material, and a slider 13, which is rotatable relative to the slideways 11, 12.
  • the two grinding tracks 11, 12 are designed as arc sections which are applied concentrically to one another on a base plate 14, which in turn is firmly accommodated in the housing 10.
  • the grinder 13 sits on a rotary shaft 15 which is mounted in the housing 10 and, in the case of using the potentiometer as a position sensor for detecting the pivoting angle of a throttle valve, is connected in a rotationally fixed manner to the actuating shaft of the throttle valve or is formed by the actuating shaft of the throttle valve.
  • the front and rear ends of the sliding track 11 are each connected to a connecting terminal 16, 17 via conductor tracks 111, 112, while the front end of the sliding track 12 is only connected to a connecting terminal 18 via a conductive path 121.
  • the connecting terminals 16 - 18 are guided to plug pins, not shown here, in a plug housing 26.
  • the connector pins are assigned such that a potentiometer voltage is applied to the connecting terminals 16 and 17 and the voltage tapped at the potentiometer is taken from the connecting terminal 18, which voltage is a measure of the rotational position of the grinder 13 or of the component connected to it in a rotationally fixed manner, for example the Throttle valve, is.
  • the grinder 13 has a plurality of contact elements 19 which rest on the sliding tracks 11, 12 with a contact surface 20 (FIG. 4).
  • the plurality of contact elements 19 is divided into two groups 191 and 192, of which the group 191 of the contact elements 19 with their contact surfaces 20 on the sliding track 11 and the group 192 of the contact elements 19 with their
  • each contact element 19 has an electrically conductive core 21 made of an inexpensive filler of a conductive material, at least in the area of its contact surface 20, that is to say at its end resting on the sliding track 11 or 12 Graphite, carbon fiber and dgL, and a noble metal jacket 22 surrounding the core 21. Core 21 and noble metal jacket 22 are flush on the end face, so that the annular end face of the noble metal jacket 22 forms the contact surface 20 together with the end face of the core 21.
  • each contact element 19 is designed as a long grinding wire 23, which at its end remote from the contact surface 20 is supported on an electrically conductive carrier plate 24, e.g. a support plate is attached.
  • the attachment is preferably carried out by welding the grinding wire end onto the carrier plate 24.
  • the carrier plate 24 is either attached to the underside of a plastic grinding arm 25 or itself forms the grinding arm 25, which is then connected in a rotationally fixed manner to the rotary shaft 15 via a plastic bushing.
  • each grinding wire 23 is angled and has a long leg 231, which is fastened at the end to the carrier plate 24, and a short leg 232 protruding therefrom at right angles, which carries the contact surface 20 at its end.
  • the core 21 of the grinding wire 23 is preferably made of spring steel, which is enclosed by the noble metal jacket 22 over the entire length of the grinding wire.
  • the desired contact pressure of the contact surface 20 on the sliding tracks 11, 12 can be set by a suitable prestressing of the now resilient grinding wire.
  • Each of the multiplicity of grinding wires 23 which — as described — contact the sliding track 11 in group 191 and contact the sliding track 12 in group 192 have an outer diameter of approximately 0.1 mm.
  • the invention is not restricted to the exemplary embodiment described above.
  • a single slideway to which a potentiometer voltage is applied is sufficient.
  • the measuring voltage is then taken from the grinder 13, which is carried out with a corresponding electrical connection.
  • the relative movement between Grinder 13 and grinding tracks 11, 12 are not a rotary movement, but can be designed as a linear displacement.
  • the base plate carrying the grinding tracks 11, 12 can also be rotated or displaced linearly, the grinder 13 then being spatially fixed.

Landscapes

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

Abstract

L'invention concerne un potentiomètre utilisé notamment comme détecteur de position ou capteur d'emplacement, qui présente au moins une bande de glissement et un curseur qui comporte au moins un élément de contact (19) reposant par une surface de contact (20) sur la bande de glissement et établissant un contact électrique avec la bande de glissement. Le curseur et la bande de contact peuvent se déplacer l'un par rapport à l'autre. Afin de réduire les coûts par diminution du métal noble utilisé dans le potentiomètre pour la mise en contact, l'élément de contact (19) comporte un noyau (21) électroconducteur et une enveloppe en métal noble (22) qui renferme le noyau (21) et dont la face avant annulaire constitue au moins en partie la surface de contact (20).
EP02747230A 2001-09-04 2002-06-20 Potentiometre Withdrawn EP1428230A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10143164.3A DE10143164B4 (de) 2001-09-04 2001-09-04 Potentiometer
DE10143164 2001-09-04
PCT/DE2002/002253 WO2003028046A1 (fr) 2001-09-04 2002-06-20 Potentiometre

Publications (1)

Publication Number Publication Date
EP1428230A1 true EP1428230A1 (fr) 2004-06-16

Family

ID=7697572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02747230A Withdrawn EP1428230A1 (fr) 2001-09-04 2002-06-20 Potentiometre

Country Status (5)

Country Link
US (1) US6838973B2 (fr)
EP (1) EP1428230A1 (fr)
JP (1) JP2005504302A (fr)
DE (1) DE10143164B4 (fr)
WO (1) WO2003028046A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004028838A1 (de) * 2004-06-16 2006-01-26 W.C. Heraeus Gmbh Schleifkontakt
US8736285B2 (en) 2011-06-03 2014-05-27 Hamilton Sundstrand Corporation High temperature position sensor
FR2983987B1 (fr) * 2011-12-09 2014-01-10 Thales Sa Dispositif d'entree de donnees a potentiometre et manche destine au pilotage d'un aeronef, le manche comprenant le dispositif d'entree de donnees

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3597720A (en) * 1969-09-05 1971-08-03 Gulf & Western Ind Prod Co Wiper arm and potentiometer comprising the same
US5673015A (en) * 1994-05-19 1997-09-30 Tubame Musen Inc. Sliding type variable resistor
US5982272A (en) * 1997-05-30 1999-11-09 Murata Manufacturing Co., Ltd. Variable resistor

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447780A (en) * 1947-05-03 1948-08-24 Honeywell Regulator Co Potentiometer assembly
US3353134A (en) * 1964-08-17 1967-11-14 Amphenol Corp Resistive element and variable resistor
US3328707A (en) * 1965-06-01 1967-06-27 Markite Corp Wiper assembly for potentiometers
DE2125609A1 (de) * 1968-05-13 1972-12-14 Illinois Tool Works Federkontakt sowie Verfahren zur Herstellung desselben.-
FR2053825A5 (fr) * 1969-07-18 1971-04-16 Electro Resistance
DE2254085A1 (de) * 1972-11-04 1974-05-16 Itw Ateco Gmbh Veraenderbarer widerstand
US3936624A (en) * 1974-03-04 1976-02-03 Illinois Tool Works Inc. Multifinger contact
US3974471A (en) * 1975-07-30 1976-08-10 Illinois Tool Works Inc. Brush contact
JPS62274701A (ja) * 1986-05-23 1987-11-28 アイシン精機株式会社 可変抵抗器
JPH01157502A (ja) * 1987-12-14 1989-06-20 Tanaka Kikinzoku Kogyo Kk 摺動ブラシ
DE3911100A1 (de) * 1989-04-06 1990-10-18 Siedle Horst Kg Vorrichtung zur (bewegten) elektrischen kontaktgabe
US5047746A (en) * 1990-05-24 1991-09-10 Bourns, Inc. Potentiometer wiper assembly
DE4137989A1 (de) * 1991-11-19 1993-05-27 Siedle Horst Kg Beweglicher abgriff oder schleifer fuer potentiometer
DE19624780A1 (de) * 1996-06-21 1998-01-02 Bosch Gmbh Robert Positonssensor
US5818324A (en) * 1996-11-13 1998-10-06 Resistance Technology, Inc. Wire coil potentiometer wiper
JPH11295016A (ja) * 1998-04-08 1999-10-29 Matsushita Electric Ind Co Ltd 位置センサ
DE19913246A1 (de) * 1999-03-24 2000-09-28 Siedle Horst Gmbh & Co Kg Schleifer zur Übertragung elektrischer Signale
JP2001155909A (ja) * 1999-11-30 2001-06-08 Murata Mfg Co Ltd 可変抵抗器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3597720A (en) * 1969-09-05 1971-08-03 Gulf & Western Ind Prod Co Wiper arm and potentiometer comprising the same
US5673015A (en) * 1994-05-19 1997-09-30 Tubame Musen Inc. Sliding type variable resistor
US5982272A (en) * 1997-05-30 1999-11-09 Murata Manufacturing Co., Ltd. Variable resistor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO03028046A1 *

Also Published As

Publication number Publication date
DE10143164A1 (de) 2003-03-20
WO2003028046A1 (fr) 2003-04-03
US6838973B2 (en) 2005-01-04
US20040041687A1 (en) 2004-03-04
JP2005504302A (ja) 2005-02-10
DE10143164B4 (de) 2015-04-02

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