EP0108949A1 - Dispositif pour enregistrer la position et/ou la vitesse d'un piston d'un vérin - Google Patents

Dispositif pour enregistrer la position et/ou la vitesse d'un piston d'un vérin Download PDF

Info

Publication number
EP0108949A1
EP0108949A1 EP83110401A EP83110401A EP0108949A1 EP 0108949 A1 EP0108949 A1 EP 0108949A1 EP 83110401 A EP83110401 A EP 83110401A EP 83110401 A EP83110401 A EP 83110401A EP 0108949 A1 EP0108949 A1 EP 0108949A1
Authority
EP
European Patent Office
Prior art keywords
piston rod
piston
sensor
cylinder
depressions
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Withdrawn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
EP83110401A
Other languages
German (de)
English (en)
Inventor
Hans-Friedrich Dipl.-Ing. Meyer
Dietmar Dipl.-Ing. Schmidt
Rolf Heise
Werner Dannenberg
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.)
Wabco Westinghouse Steuerungstechnik and Co GmbH
Original Assignee
Wabco Westinghouse Steuerungstechnik and Co 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 Wabco Westinghouse Steuerungstechnik and Co GmbH filed Critical Wabco Westinghouse Steuerungstechnik and Co GmbH
Publication of EP0108949A1 publication Critical patent/EP0108949A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2846—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using detection of markings, e.g. markings on the piston rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means

Definitions

  • the invention relates to a device for detecting the position and / or the speed of the piston of a working cylinder according to the preamble of claim 1.
  • Such facilities are such.
  • This known device has the disadvantage of being space-consuming since both the scale and the sensor are arranged outside the working cylinder.
  • Another device known from DE-OS 29 45 895 for detecting the piston position is designed such that one or more magnetic tracks are provided on the piston rod, which interact with one or more magnetic field sensors and a corresponding electronic circuit.
  • the magnetic field sensors of this device are arranged in the cylinder cover on the piston rod side.
  • This device is arranged in a space-saving and protected manner in the cylinder, but requires a relatively complex treatment of the piston rod of the working cylinder.
  • the invention is therefore based on the object of providing a device of the type mentioned at the outset which can be produced with less effort than the known devices.
  • the invention offers the particular advantage of the order of any number of recesses in the piston rod in a simple manner to obtain a scale interacting with a sensor, the accuracy of which can be easily adapted to the corresponding requirements.
  • a simple threaded rod provided with a coating is used as the piston rod, the pulse density emitted by the sensor can be easily changed by using threaded rods with different thread pitches.
  • a working cylinder 13 which has a piston 11 connected to a piston rod 5.
  • the piston 11 divides the working cylinder into a first pressure medium chamber 10 on the piston rod side and one opposite the pressure medium chamber 10 on the piston rod side second pressure medium chamber 12 arranged on the other side of the piston 11.
  • the first pressure medium chamber 10 is connected via a pressure medium connection 19 and a pressure medium line 18 to a first outlet of an electrically controllable valve device 16.
  • a second outlet of the valve device 16 is connected to the second pressure medium chamber 12 of the working cylinder 13 via a pressure medium line 14 and a pressure medium connection 20.
  • a pressure medium line 21 connects the pressure medium inlet of the valve device 16 to a pressure medium source 22.
  • the valve device 16 contains both an inlet valve and an outlet valve both for the first pressure medium chamber 10 and for the second pressure medium chamber 12 of the cylinder. At least one throttle is assigned to each outlet valve.
  • the piston rod 5 has flat threads 6 over its entire length and is provided with an aluminum jacket 7. Instead of flat threads, trapezoidal or pointed threads can also be provided.
  • a recess 9 is provided with a sealing ring 8, through which the piston rod 5 is led out of the working cylinder 13.
  • a sensor 3, 4 provided with a pole piece 4 is arranged in the cylinder cover 23 perpendicular to the longitudinal axis of the piston rod 5. The sensor contains a permanent magnet.
  • the pole piece 4 of the sensor 3, 4 is dimensioned such that when the piston rod 5 provided with thread 6 drives past the pole piece 4, several of the elevations formed by the thread 6 are not simultaneously covered by the pole piece 4.
  • a signal line 2 leads from the sensor 3, 4 to an input of an electronic evaluation and control circuit 1, which contains an analog-digital converter for converting a sinusoidal voltage into square-wave pulses.
  • the electronic evaluation and control circuit is connected to the valve device 16 via signal lines 15, 17.
  • the evaluation circuit is designed so that it generates a pulse when the magnetic field reaches a strength that only when an increase in the thread 6 passes the pole piece 4 of the sensor 3.4 occurs.
  • the pulses occurring per unit of time are counted by the evaluation circuit and the speed of the piston 11 or the piston rod 5 is thus determined.
  • the actual speed determined in this way is compared with a predetermined target speed. If the ACTUAL speed value exceeds the TARGET speed value, an output signal is generated which reaches the valve device 16 via the signal line 17.
  • the signal emitted by the electronic evaluation and control circuit 1 has the effect that the pressure in the first pressure medium chamber 10 of the working cylinder is reduced in a throttled manner until the actual speed of the piston 11 or the piston rod 5 corresponds to the predetermined target speed.
  • the evaluation circuit is designed so that the distance. represents a defined path between two pulses, the instantaneous position of the piston 11 can be determined over the entire piston stroke.
  • FIG. 2 shows a section of a working cylinder 24, from which a piston rod 29 is led out.
  • the piston rod 29 is made of magnetizable material 'and points in the direction of its longitudinal axis to extend a plurality of radially inwardly extending bores 28, which are arranged at the same distance from each other.
  • the bores 28 are filled with a non-magnetizable material 27.
  • the piston rod 29 is sealed by a sealing ring 26, which is mounted in the wall of a recess provided in the cylinder cover 25.
  • a sensor 32, 31 is arranged in the cylinder cover 25 perpendicular to the piston rod running surface in such a way that a small air gap remains between the outer surface of the piston rod 29 and the pole piece 31 of the sensor 32, 31.
  • the function of this device is the same as that of the device described in FIG. 1.
  • the elevations and depressions required to change the magnetic field building up between the pole piece 31 of the sensor 32, 31 and the piston rod 29 are formed by the bores 28 and the webs 30 remaining between the bores 28.
  • FIG. 3 Another possibility of providing the piston rod with the required elevations and depressions is shown in FIG. 3.
  • a piston (not shown), which is connected to a piston rod 36, is arranged in a cylinder 40.
  • the piston rod 36 is led out of the cylinder through a recess arranged in the cylinder cover 33.
  • a sealing ring 34 is arranged in the wall of the recess for the passage of the piston rod 36, which sealingly surrounds the piston rod 36.
  • the piston rod 36 has circumferential grooves 4I arranged at the same distance from one another.
  • the piston rod 36 is provided with a plastic jacket 35.
  • a sensor 39, 38 is arranged in the cylinder cover 33 perpendicular to the longitudinal axis of the piston rod.
  • the elevations and depressions required to change the magnetic field building up between the pole piece 38 of the sensor 39, 38 and the piston rod 36 are formed by the circumferential projections 37 and the circumferential grooves 41.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Actuator (AREA)
EP83110401A 1982-11-10 1983-10-19 Dispositif pour enregistrer la position et/ou la vitesse d'un piston d'un vérin Withdrawn EP0108949A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823241525 DE3241525A1 (de) 1982-11-10 1982-11-10 Einrichtung zum erfassen der position oder/und der geschwindigkeit des kolbens eines arbeitszylinders
DE3241525 1982-11-10

Publications (1)

Publication Number Publication Date
EP0108949A1 true EP0108949A1 (fr) 1984-05-23

Family

ID=6177748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110401A Withdrawn EP0108949A1 (fr) 1982-11-10 1983-10-19 Dispositif pour enregistrer la position et/ou la vitesse d'un piston d'un vérin

Country Status (2)

Country Link
EP (1) EP0108949A1 (fr)
DE (1) DE3241525A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634730A1 (de) * 1986-10-11 1988-04-21 Klaus Huegler Arbeitszylinder, insbesondere pneumatikzylinder fuer komponenten von handlingautomaten
EP0618373A1 (fr) * 1993-03-30 1994-10-05 Hydraudyne Cylinders B.V. Indicateur de position
EP2226514A1 (fr) * 2009-03-06 2010-09-08 SICK STEGMANN GmbH Dispositif de mesure de la position axiale d'une tige de piston par rapport à un boîtier de cylindre
EP1790860A3 (fr) * 2005-11-24 2011-10-19 LuK Lamellen und Kupplungsbau Beteiligungs KG Système de mesure de déplacement linéaire pour des systèmes de détachement d'embrayage
KR101130098B1 (ko) * 2007-12-17 2012-03-28 알까뗄 루슨트 집합된 클라이언트 패킷들의 이송

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508479A1 (de) * 1985-03-09 1986-09-11 Ruhrkohle Ag, 4300 Essen Einrichtung zur wegerfassung, beispielsweise des rueckweges in abbaubetrieben des steinkohlenbergbaus
DE3639150A1 (de) * 1986-11-15 1988-05-19 Wabco Westinghouse Steuerung Potentiometer bzw. veraenderbarer widerstand
DE3643290A1 (de) * 1986-12-18 1988-06-30 Boge Ag Vorrichtung zur wegbestimmung eines kolbens
DE3900086A1 (de) * 1989-01-03 1990-07-05 Norbert Kolb Verstelleinrichtung mit sensor fuer ein arbeitsgeraet, insbesondere drehpflug
DE3940819C2 (de) * 1989-12-11 1994-01-20 Bilstein August Gmbh Co Kg Aktiver Schwingungsdämpfersensor zur Messung der Relativgeschwindigkeit zwischen Aufbau und Achse
DE4236057A1 (de) * 1992-10-26 1994-04-28 Tox Pressotechnik Gmbh Wegaufnehmer für Druckübersetzer
DE19622545A1 (de) * 1996-06-05 1997-12-11 Teves Gmbh Alfred Vorrichtung zum Messen
DE19818796A1 (de) * 1998-04-27 1999-11-04 Walter Hunger Kolbenstange, Kolbenanordnung und Verfahren zur Herstellung einer Kolbenstange
JP4713584B2 (ja) * 2004-07-14 2011-06-29 テネコ オートモティブ オペレーティング カンパニー インコーポレイテッド 一体化された変位センサをもつショックアブソーバ
DE102004040587B3 (de) * 2004-08-21 2006-04-13 Zf Friedrichshafen Ag Sensoranordnung für einen Schwingungsdämpfer
DE102017118509B4 (de) * 2017-08-14 2025-06-12 Jungheinrich Aktiengesellschaft Zylinder mit einer Kolbenstange und einem optischen Positionsmesser
CN112394192A (zh) * 2019-08-19 2021-02-23 和舰芯片制造(苏州)股份有限公司 气缸测速仪器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2233512A1 (en) * 1973-06-14 1975-01-10 Repiquet Sa Vice with controlled displacement - has plastic marks on stem for photodetector
US3956973A (en) * 1972-07-11 1976-05-18 Basic Aluminum Castings Company Die casting machine with piston positioning control

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1262621B (de) * 1959-02-26 1968-03-07 Contraves Ag Elektromechanische Einrichtung zur Feststellung der momentanen Relativlage zweier gegeneinander verschiebbarer Maschinenteile
DE1299432B (de) * 1967-12-30 1969-07-17 Maurer Ludwig Verfahren und Vorrichtung zur Stellwegmessung bei einer mit einem Druckmedium beaufschlagten Kolben-zylinder-Einheit
DE2933557C2 (de) * 1979-08-18 1982-11-04 Robert Bosch Gmbh, 7000 Stuttgart Meßumformer zur berührungslosen Weg- oder Geschwindigkeitsmessung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956973A (en) * 1972-07-11 1976-05-18 Basic Aluminum Castings Company Die casting machine with piston positioning control
FR2233512A1 (en) * 1973-06-14 1975-01-10 Repiquet Sa Vice with controlled displacement - has plastic marks on stem for photodetector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MACHINE DESIGN, Band 54, Nr. 5, M{rz 1982, Seite 72, Cleveland, Ohio, US *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634730A1 (de) * 1986-10-11 1988-04-21 Klaus Huegler Arbeitszylinder, insbesondere pneumatikzylinder fuer komponenten von handlingautomaten
EP0618373A1 (fr) * 1993-03-30 1994-10-05 Hydraudyne Cylinders B.V. Indicateur de position
NL9300565A (nl) * 1993-03-30 1994-10-17 Hydraudyne Cylinders Bv Positie-indicator.
EP1790860A3 (fr) * 2005-11-24 2011-10-19 LuK Lamellen und Kupplungsbau Beteiligungs KG Système de mesure de déplacement linéaire pour des systèmes de détachement d'embrayage
KR101130098B1 (ko) * 2007-12-17 2012-03-28 알까뗄 루슨트 집합된 클라이언트 패킷들의 이송
EP2226514A1 (fr) * 2009-03-06 2010-09-08 SICK STEGMANN GmbH Dispositif de mesure de la position axiale d'une tige de piston par rapport à un boîtier de cylindre
US8151636B2 (en) 2009-03-06 2012-04-10 Sick Stegmann Gmbh Device for measuring the axial position of a piston rod relative to a cylinder housing

Also Published As

Publication number Publication date
DE3241525A1 (de) 1984-05-10

Similar Documents

Publication Publication Date Title
EP0108949A1 (fr) Dispositif pour enregistrer la position et/ou la vitesse d'un piston d'un vérin
DE2933557C2 (de) Meßumformer zur berührungslosen Weg- oder Geschwindigkeitsmessung
DE3347491C2 (fr)
DE3715591A1 (de) Einrichtung und verfahren zur ueberwachung des schaltzustandes von magnetventilen bei elektrohydraulischen ausbausteuerungen u.dgl.
EP2166312B2 (fr) Capteur de trajectoire magnétique ou inductif
EP0355179A1 (fr) Disposition de vérin linéaire
DE3319522C2 (de) Druckmittelbetätigte Kolben-Zylinder-Einheit
DE1299432B (de) Verfahren und Vorrichtung zur Stellwegmessung bei einer mit einem Druckmedium beaufschlagten Kolben-zylinder-Einheit
DE102010028333A1 (de) Inkrementelles Multipositions-Erfassungssystem für ein umlaufendes elektromagnetisches Transfersystem
DE4201464C2 (de) Vorrichtung zur Dämpfung eines in einem Zylinder verschiebbaren Kolbens in wenigstens einem seiner Endlagenbereiche
DE4108158C2 (de) Linear-Antriebsvorrichtung
EP2072961A1 (fr) Capteur
DE3507974A1 (de) Druckluftzylinder-baugruppe
DE102007029488B4 (de) Sensor
DE19712829B4 (de) Vorrichtung zur Erkennung der Position eines beweglichen Gegenstandes
EP0103162B1 (fr) Dispositif de mesure et de commande pour charges suspendues à des câbles, en particulier pour soulever des décors de théatre
DE3634730A1 (de) Arbeitszylinder, insbesondere pneumatikzylinder fuer komponenten von handlingautomaten
DE19622545A1 (de) Vorrichtung zum Messen
EP0111637A1 (fr) Système pour capter et régler la vitesse du piston d'un cylindre
EP0922936B1 (fr) Capteur de position
DE19545923A1 (de) Einrichtung mit einem Zylinder, einem in diesem verschiebbaren Kolben und einem im Zylinder angeordneten, induktiven Meßwandler
DE2916500C2 (fr)
DE3324584A1 (de) Einrichtung zum feststellen einer relativen verschiebelage
EP0310776B1 (fr) Dispositif de transmission de signaux d'une pièce rotative à une pièce stationnaire, en particulier d'une roue d'un véhicule sur ce véhicule
DE3803764A1 (de) Reed-schaltervorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR IT LI NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850124

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHMIDT, DIETMAR, DIPL.-ING.

Inventor name: HEISE, ROLF

Inventor name: DANNENBERG, WERNER

Inventor name: MEYER, HANS-FRIEDRICH, DIPL.-ING.