EP2149715A3 - Position detection device for a fluid cylinder - Google Patents

Position detection device for a fluid cylinder Download PDF

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Publication number
EP2149715A3
EP2149715A3 EP09008292A EP09008292A EP2149715A3 EP 2149715 A3 EP2149715 A3 EP 2149715A3 EP 09008292 A EP09008292 A EP 09008292A EP 09008292 A EP09008292 A EP 09008292A EP 2149715 A3 EP2149715 A3 EP 2149715A3
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston rod
detection device
position detection
fluid cylinder
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.)
Granted
Application number
EP09008292A
Other languages
German (de)
French (fr)
Other versions
EP2149715B1 (en
EP2149715A2 (en
Inventor
Alfred Dr.-Ing. Engler
Nejat Dr.-Ing. Mahdavi
Christian Dr.-Ing. Thürigen
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.)
Liebherr Electronics and Drives GmbH
Original Assignee
Liebherr Elektronik 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 Liebherr Elektronik GmbH filed Critical Liebherr Elektronik GmbH
Publication of EP2149715A2 publication Critical patent/EP2149715A2/en
Publication of EP2149715A3 publication Critical patent/EP2149715A3/en
Application granted granted Critical
Publication of EP2149715B1 publication Critical patent/EP2149715B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F15B15/2853—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using potentiometers

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)

Abstract

Die vorliegende Erfindung betrifft eine Positionsmeßvorrichtung für einen fluidischen Zylinder, welcher einen Zylindermantel (1) und eine im Zylindermantel (1) längsverschieblich geführte Kolbenstange (2) aufweist, wobei die Positionsmeßvorrichtung eine Auswerteeinheit (30) aufweist, welche die Position der Kolbenstange (2) bezüglich des Zylindermantels (1) anhand der intrinsischen Kapazität des von Zylindermantel (1), Kolbenstange (2) und einem als Dielektrikum wirkenden dielektrischen Fluid gebildeten Kondensators bestimmt.

Figure imgaf001
The present invention relates to a position measuring device for a fluidic cylinder which has a cylinder jacket (1) and a cylinder rod (1) longitudinally displaceably guided piston rod (2), wherein the position measuring device has an evaluation unit (30) which determines the position of the piston rod (2). with respect to the cylinder jacket (1) determined on the basis of the intrinsic capacity of the cylinder jacket (1), piston rod (2) and a dielectric fluid acting as a dielectric fluid formed capacitor.
Figure imgaf001
EP09008292.6A 2008-07-31 2009-06-24 Position detection device for a fluid cylinder Active EP2149715B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202008010230U DE202008010230U1 (en) 2008-07-31 2008-07-31 Position measuring device for a fluidic cylinder

Publications (3)

Publication Number Publication Date
EP2149715A2 EP2149715A2 (en) 2010-02-03
EP2149715A3 true EP2149715A3 (en) 2012-11-07
EP2149715B1 EP2149715B1 (en) 2017-06-07

Family

ID=41314654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09008292.6A Active EP2149715B1 (en) 2008-07-31 2009-06-24 Position detection device for a fluid cylinder

Country Status (3)

Country Link
US (1) US8117908B2 (en)
EP (1) EP2149715B1 (en)
DE (1) DE202008010230U1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010034749A1 (en) * 2010-08-19 2012-02-23 Schaeffler Technologies Gmbh & Co. Kg Device for monitoring a rotating machine part
DE102011008381A1 (en) * 2011-01-12 2012-07-12 Liebherr-Elektronik Gmbh Piston-cylinder unit with device for position determination
US9217405B2 (en) * 2011-06-22 2015-12-22 Ford Global Technologies, Llc System and method for lubricating a fuel pump
JP6083736B2 (en) * 2013-01-11 2017-02-22 株式会社やまびこ Boom sprayer and boom lifting device
DE102013001121A1 (en) * 2013-01-23 2014-07-24 Liebherr-Elektronik Gmbh Method for determining the piston position of a piston-cylinder unit and piston-cylinder unit
DE102013014753B4 (en) * 2013-09-06 2021-03-18 Lisa Dräxlmaier GmbH Device for processing several components of a pallet with secondary locking, and method
DE102013018342A1 (en) * 2013-10-31 2015-04-30 Liebherr-Elektronik Gmbh Piston-cylinder unit with evaluation unit for determining the position of the piston
CN105534523B (en) * 2015-12-07 2018-04-24 天津大学 Thoracic cavity outline data harvester for torso model electrical impedance tomography
CN105547127B (en) * 2015-12-07 2018-04-27 天津大学 Displacement sensor for torso model data acquisition
JP1561824S (en) * 2016-03-25 2017-01-23
FR3064322B1 (en) * 2017-03-23 2022-08-12 Valeo Embrayages CONTROL DEVICE COMPRISING A CYLINDER
DE102017131066A1 (en) * 2017-12-22 2019-06-27 Endress+Hauser SE+Co. KG Method of providing calibrated pressure transducers
DE102018117775A1 (en) 2018-07-23 2020-01-23 Stabilus Gmbh Length measurement on piston-cylinder arrangements
WO2023033779A1 (en) * 2021-09-02 2023-03-09 Skvorchevsky Alexander Electro-hydraulic servo drive and a method of controlling the position of its rod with a piston

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518858A1 (en) * 1984-05-28 1985-11-28 Nissan Motor Co., Ltd., Yokohama, Kanagawa Shock absorber with a device for length measurement
EP0358366A2 (en) * 1988-08-20 1990-03-14 Atsugi Motor Parts Co. Ltd. Electrostatic capacity-type displacement sensor

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
US3928796A (en) * 1973-11-30 1975-12-23 Int Lead Zinc Res Capacitive displacement transducer
US3948359A (en) * 1975-04-14 1976-04-06 General Motors Corporation Vehicle hydraulic shock absorber and indicating system
DE3331170C1 (en) * 1983-06-15 1984-12-13 Boge Gmbh, 5208 Eitorf Device for determining the path of a piston of hydraulic, pneumatic or hydropneumatic units
ES532751A0 (en) * 1983-09-24 1985-01-16 Boge Gmbh DEVICE TO DETERMINE THE TRAVEL OF A HYDRAULIC, PNEUMATIC OR HYDRAULIC PISTON
US4788489A (en) * 1985-07-12 1988-11-29 Nissan Motor Co., Ltd. Position sensor for use in variable height automotive suspension or the like
US5387004A (en) * 1988-04-16 1995-02-07 Volkswagen Ag Coupling rod for jointed attachment of a U-shape stabilizer arm
US4949573A (en) * 1989-11-13 1990-08-21 Lord Corporation Velocity transducer for vehicle suspension system
US5396973A (en) * 1991-11-15 1995-03-14 Lord Corporation Variable shock absorber with integrated controller, actuator and sensors
US5585733A (en) * 1992-09-10 1996-12-17 David Sarnoff Research Center Capacitive sensor and method of measuring changes in capacitance
US5510986A (en) * 1994-03-14 1996-04-23 Trw Inc. Method and apparatus for controlling an active suspension system
US5901633A (en) * 1996-11-27 1999-05-11 Case Corporation Method and apparatus for sensing piston position using a dipstick assembly
US6662099B2 (en) * 2001-05-22 2003-12-09 Massachusetts Institute Of Technology Wireless roadway monitoring system
DE20218623U1 (en) 2002-11-30 2003-02-13 Festo Ag & Co Position measuring device for fluid cylinders with a piston rod electrically connected to the cylinder housing
JP4228927B2 (en) * 2004-02-04 2009-02-25 株式会社デンソー Acceleration sensor module
US7548075B2 (en) * 2004-08-31 2009-06-16 Koninklijke Philips Electronics N.V. Proximity sensor for X-ray apparatus
US7521921B2 (en) * 2004-10-26 2009-04-21 Georgia Tech Research Corporation Displacement sensor
US7443174B2 (en) * 2006-04-06 2008-10-28 Freescale Semiconductor, Inc. Electric field reciprocal displacement sensors
DE202007001420U1 (en) * 2007-01-31 2007-04-12 Festo Ag & Co Position measuring device for a fluidic cylinder comprises a longitudinal channel in a cylinder housing for receiving a sensor support which lies on a housing end region and is supported on a pressure spring

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518858A1 (en) * 1984-05-28 1985-11-28 Nissan Motor Co., Ltd., Yokohama, Kanagawa Shock absorber with a device for length measurement
EP0358366A2 (en) * 1988-08-20 1990-03-14 Atsugi Motor Parts Co. Ltd. Electrostatic capacity-type displacement sensor

Also Published As

Publication number Publication date
US20100089144A1 (en) 2010-04-15
EP2149715B1 (en) 2017-06-07
US8117908B2 (en) 2012-02-21
DE202008010230U1 (en) 2009-12-10
EP2149715A2 (en) 2010-02-03

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