EP1098180B1 - Dispositif pour mesurer un déplacement - Google Patents

Dispositif pour mesurer un déplacement

Info

Publication number
EP1098180B1
EP1098180B1 EP20000121126 EP00121126A EP1098180B1 EP 1098180 B1 EP1098180 B1 EP 1098180B1 EP 20000121126 EP20000121126 EP 20000121126 EP 00121126 A EP00121126 A EP 00121126A EP 1098180 B1 EP1098180 B1 EP 1098180B1
Authority
EP
European Patent Office
Prior art keywords
transmission
displacement
compression spring
sensing device
sensing
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.)
Expired - Lifetime
Application number
EP20000121126
Other languages
German (de)
English (en)
Other versions
EP1098180A1 (fr
Inventor
Helmut Plener
Günter Eisermann
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.)
MAN Truck and Bus SE
Robert Seuffer GmbH and Co KG
Original Assignee
Robert Seuffer GmbH and Co KG
MAN Nutzfahrzeuge AG
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 Seuffer GmbH and Co KG, MAN Nutzfahrzeuge AG filed Critical Robert Seuffer GmbH and Co KG
Publication of EP1098180A1 publication Critical patent/EP1098180A1/fr
Application granted granted Critical
Publication of EP1098180B1 publication Critical patent/EP1098180B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/52—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H01H13/063—Casings hermetically closed by a diaphragm through which passes an actuating member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/052—Strain gauge

Definitions

  • the invention relates to a device for measuring the distance according to the preamble of claim 1.
  • Such from the EP-A-0 440 011 known device serves as a force, in particular pressure measuring device and has a permanently connected to a piston sensing device, which acts on the force to be measured.
  • the resulting piston movement is transmitted via an elastomeric material, in which the piston is embedded in a cup-shaped housing, on the deformable bottom of the cup-shaped housing.
  • a sensor which provides an electrical signal proportional to the deformation.
  • the deformable bottom forms a sensor cooperating surface which extends transversely to the direction of translation transmitted by the transmission.
  • the bottom can be formed as a membrane and the sensor can be formed by one or more strain gauges.
  • a pressure measuring device in which the pressure to be measured acts on a piston surface and the piston is displaced against the biasing force of a spring proportional to the pressure to be measured.
  • the object of the invention is to provide a device of the type mentioned, with which a touched by the sensing device linear displacement with simple Means is transmitted to the sensor having deformable part.
  • a helical compression spring of the transmission device and the sensing device have a common linear or axial guide, said guide being rod-shaped and extending in the interior of the helical compression spring and a sleeve-shaped part of the sensing device.
  • the deformable member may have a deformable surface cooperating with the sensor which extends transversely to the direction of the transmission means stretching shift.
  • the deformable part can form the bottom of a measuring cell, in which the Obertragungs worn is used.
  • the transfer device can have a transfer foot, which covers substantially the entire bottom of the cup-shaped measuring cell and is convexly curved on its surface facing the deformable part.
  • the scanning device is guided in a preferred manner in an adapter displaceable.
  • the adapter can be connected by a plug or screw connection or other suitable connection with a component, against which a displacement movement of another component is to be measured.
  • the sensing device comes into contact with the component whose displacement is to be detected or measured.
  • This may be, for example, a transmission part of a motor vehicle. Frictional forces resulting from the linear or axial guidance of the sensing device do not affect the measured variable. For example, by self-calibration, the Reibungshimfte can be compensated.
  • the adapter is suitably connected to a housing, in which the electronic evaluation device is arranged, which serves for the evaluation of the sensor signals.
  • This housing forms at the same time a protection against high-frequency interference and is preferably designed as it is in the DE 198 12 296 A1 is described. As a result, when used in a transmission, a transmission switch can be formed.
  • the device has a sensing device 1, which is guided in an adapter 10 in the axial direction displaceable.
  • the sensing device 1 has a sleeve-shaped or cylindrical part, which extends in the axial direction in the adapter 10 and also a probe with a touch surface 13, which is brought to a component to be monitored for scanning system.
  • the lateral surface of the cylindrical part of the sensing device 1 can for this purpose abut against a corresponding guide surface of the adapter 10, as can be seen from the figure.
  • a sleeve 8 may be provided, which is provided between the probe and the adapter 10.
  • a rod-shaped guide 5 extends inside the sensing device 1, a rod-shaped guide 5.
  • a helical compression spring 6 is wound.
  • the helical compression spring 6 is supported at its one end on a collar 14 of the sensing device 1 from.
  • the helical compression spring 6 is supported on a transmission foot 7.
  • the transfer foot 7 and the rod-shaped guide 5 are connected to each other firmly or with positive engagement.
  • a bias voltage is generated, with which the sensing device is biased in the axial direction.
  • a stop 17 may be provided on the inner wall of the measuring cell 9 for the collar 14.
  • the helical compression spring 6 and the transmission foot 7 form a transmission device 3, with which the axial displacement of the sensing device 1 is transmitted to a sensor 2.
  • the measuring transducer 2 has the deformable part 4, for example in the form of a disk or membrane.
  • a sensor On the side facing away from the support foot 7 surface of the deformable part 4 is a sensor, for example in the form of one or more resistance elements of semiconductor material, such as strain gauges, which connects to a measuring bridge could be.
  • the sensor can also interact capacitively with the deformable part 4. With an axial displacement of the sensing device 1, this is transmitted to the deformable part 4 via the compression spring 6 and the transfer foot 7.
  • the deformation is detected by the sensor of the encoder 2 and delivered a signal proportional to the deformation.
  • the deformation corresponds to the axial displacement of the sensing device 1.
  • a non-compressible medium such as a hydraulic fluid can be used, which forwards the axial displacement of the sensing device 1 and deforms the deformable part 4.
  • a friction force can, for. B. be compensated by self-calibration using a transmitter 12. The frictional forces then have no influence on the measuring signal.
  • the deformable part 4 may form the bottom surface of a cup-shaped measuring cell 9.
  • the measuring cell 9 has a circular cylindrical recess into which the transmission foot 7 is inserted.
  • the outer diameter of the transmission foot 7 can correspond approximately to the inner diameter of the recess in the measuring cell 9.
  • the deformable part 4 and the side wall of the measuring cell 9 can be made in one piece.
  • the deformable part 4 and the measuring cell 9 is made of a ceramic material.
  • the output from the encoder 2 sensor signals are evaluated by the transmitter 12 and can be forwarded via an electrical connector 15.
  • Der Sensor 2 own von der Meßgeber 2 mit dem Meßgeber 2sky.
  • the transmitter and also the measuring cell 9 with the encoder 2 are located in a housing 11 which may be formed in the manner as in the DE 198 12 296 A1 is described. This housing is a perfect dissipation of high-frequency interference without affecting the sealing effect of seals 16, which serve to seal the housing achieved.
  • the adapter 10 is, as in the DE 198 12 296 A1 described, tightly inserted into the housing. By plug or screw, the adapter 10 can be firmly connected to a component against which the displacement of another component by means of the sensing device 1 is to be detected. In this case, evenly distributed on a circumference connecting means, which ensure a derivative of high-frequency electrical currents from the housing 11 to the adapter 10 may be provided, as shown in the DE 198 12 296 A1 is described.
  • various functions such as switching functions, can be effected by the sensor signals generated thereby according to their evaluations.

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Claims (17)

  1. Dispositif de mesure de course avec une installation à effleurement mécanique (1), une installation de transmission (3), laquelle transmet un déplacement de l'installation à effleurement, un transmetteur de mesure (2), lequel présente une pièce déformable (4) par le déplacement de l'installation de transmission avec un capteur, qui fournit un signal électrique proportionnel à la déformation, caractérisé en ce que l'installation à effleurement (1) présente une pièce en forme de douille avec une surface d'effleurement, cette pièce étant alimentée par une prétension mécanique opposée au déplacement à mesurer, et en ce que la pièce en forme de douille et le ressort de pression hélicoïdal (6) présentent un guidage (5) commun en forme de tige, qui s'appuie à l'intérieur sur le ressort de pression hélicoïdal (6) et sur la pièce en forme de douille.
  2. Dispositif selon la revendication 1, caractérisé en ce que la pièce déformable (4) présente une surface agissant avec le capteur, cette surface s'étendant en biais en direction du déplacement transmis par le ressort de pression hélicoïdal (6).
  3. Dispositif selon l'une des revendications 1 à 2, caractérisé en ce que la pièce déformable (4) est formée d'un disque ou une membrane mince.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que l'installation de transmission (3) présente un pied de transmission (7) s'appuyant sur la pièce déformable (4), ce pied possédant une surface convexe au niveau de la face orientée vers la pièce déformable (4).
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que l'installation de transmission (3) présente un support compressible ou incompressible transmettant le déplacement de l'installation à effleurement (1) au pied de transmission (7).
  6. Dispositif selon la revendication 5, caractérisé en ce que le support incompressible est un fluide hydraulique.
  7. Dispositif selon la revendication 5, caractérisé en ce que le support compressible est formé d'un ressort de pression hélicoïdal.
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que le ressort de pression hélicoïdal (6) est tendu entre le pied de transmission (7) et la pièce en forme de douille de l'installation à effleurement (1).
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que la pièce déformable (4) forme le fond d'un capteur de mesure dans laquelle est monté le pied de transmission (7) et l'installation de transmission (3).
  10. Dispositif selon la revendication 9, caractérisé en ce que la paroi du capteur de mesure (9) et la pièce déformable (4) sont constituées d'une pièce profilée.
  11. Dispositif selon la revendication 10, caractérisé en ce que la pièce profilée du capteur de mesure (9) est constituée d'un matériau en céramique.
  12. Dispositif selon l'une des revendications 1 à 11, caractérisé en ce que le déplacement linéaire de l'installation à effleurement (1) est arrêté avant une position de blocage du ressort de pression hélicoïdal (6).
  13. Dispositif selon la revendication 12, caractérisé en ce que le déplacement linéaire de l'installation à effleurement (1) est arrêté par une butée.
  14. Dispositif selon l'une des revendications 1 à 13, caractérisé en ce que le capteur est constitué d'une ou plusieurs jauges de contrainte.
  15. Dispositif selon l'une des revendications 1 à 14, caractérisé en ce que l'installation à effleurement (1) est guidée de manière déplaçable dans un adaptateur (10).
  16. Dispositif selon l'une des revendications 1 à 15, caractérisé en ce que les forces de frottement résultant du déplacement linéaire de l'installation à effleurement (1) sont compensées par calibrage.
  17. Dispositif selon l'une des revendications 1 à 16, caractérisé en ce que celui-ci est constitué comme contacteur de boîte de vitesses.
EP20000121126 1999-11-08 2000-09-28 Dispositif pour mesurer un déplacement Expired - Lifetime EP1098180B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999153617 DE19953617A1 (de) 1999-11-08 1999-11-08 Vorrichtung zur Wegmessung
DE19953617 1999-11-08

Publications (2)

Publication Number Publication Date
EP1098180A1 EP1098180A1 (fr) 2001-05-09
EP1098180B1 true EP1098180B1 (fr) 2007-10-03

Family

ID=7928248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000121126 Expired - Lifetime EP1098180B1 (fr) 1999-11-08 2000-09-28 Dispositif pour mesurer un déplacement

Country Status (2)

Country Link
EP (1) EP1098180B1 (fr)
DE (2) DE19953617A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016536B4 (de) 2007-04-05 2010-01-07 Robert Seuffer Gmbh & Co. Kg Vorrichtung zur Messung eines in einem Druckmedium herrschenden Drucks
DE102014206771B4 (de) 2014-04-08 2023-04-27 Inelta Sensorsysteme Gmbh & Co. Kg Linearer Messtaster

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558256A1 (fr) * 1984-01-13 1985-07-19 Brachet Pierre Detecteur avertisseur d'un defaut de pression d'un liquide ou d'un gaz
EP0440011A3 (en) * 1990-02-02 1992-06-03 Pfister Messtechnik Gmbh Force and/or measuring device
DE19812296C1 (de) * 1998-03-20 1999-11-04 Robert Seuffer Gmbh & Co Vorrichtung zur Ableitung hochfrequenter elektrischer Ströme von einem zylindrischen Gehäuse

Also Published As

Publication number Publication date
DE19953617A1 (de) 2001-05-10
DE50014691D1 (de) 2007-11-15
EP1098180A1 (fr) 2001-05-09

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