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DE69120091D1 - Vorrichtung und Verfahren zum Detektieren einer Stellung eines Kolbens - Google Patents

Vorrichtung und Verfahren zum Detektieren einer Stellung eines Kolbens

Info

Publication number
DE69120091D1
DE69120091D1 DE69120091T DE69120091T DE69120091D1 DE 69120091 D1 DE69120091 D1 DE 69120091D1 DE 69120091 T DE69120091 T DE 69120091T DE 69120091 T DE69120091 T DE 69120091T DE 69120091 D1 DE69120091 D1 DE 69120091D1
Authority
DE
Germany
Prior art keywords
piston
detecting
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 - Fee Related
Application number
DE69120091T
Other languages
English (en)
Other versions
DE69120091T2 (de
Inventor
William Allen
Ali Bitar
Robert Herold
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.)
Caterpillar Inc
Original Assignee
Caterpillar Inc
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 Caterpillar Inc filed Critical Caterpillar Inc
Publication of DE69120091D1 publication Critical patent/DE69120091D1/de
Application granted granted Critical
Publication of DE69120091T2 publication Critical patent/DE69120091T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F15B15/2869—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using electromagnetic radiation, e.g. radar or microwaves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • 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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/248—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 characteristics of pulses or pulse trains; generating pulses or pulse trains by varying pulse repetition frequency

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Toxicology (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
DE69120091T 1991-10-03 1991-10-03 Vorrichtung und Verfahren zum Detektieren einer Stellung eines Kolbens Expired - Fee Related DE69120091T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1991/007313 WO1993007444A1 (en) 1991-10-03 1991-10-03 Apparatus and method for determining the linear position of a hydraulic cylinder

Publications (2)

Publication Number Publication Date
DE69120091D1 true DE69120091D1 (de) 1996-07-11
DE69120091T2 DE69120091T2 (de) 1997-01-30

Family

ID=22225855

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69120091T Expired - Fee Related DE69120091T2 (de) 1991-10-03 1991-10-03 Vorrichtung und Verfahren zum Detektieren einer Stellung eines Kolbens

Country Status (5)

Country Link
US (1) US5471147A (de)
EP (1) EP0560894B1 (de)
JP (1) JPH06503419A (de)
DE (1) DE69120091T2 (de)
WO (1) WO1993007444A1 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5608332A (en) * 1995-05-09 1997-03-04 Caterpillar Inc. Dynamic gain adjustment in electromagnetic wave hydraulic cylinder piston position sensing
AUPO359096A0 (en) * 1996-11-13 1996-12-05 Lonsdale, Anthony Apparatus for tracking resonant frequency
US5977778A (en) * 1996-11-27 1999-11-02 Case Corporation Method and apparatus for sensing piston position
US6142059A (en) * 1996-11-27 2000-11-07 Case Corporation Method and apparatus for sensing the orientation of a mechanical actuator
US5901633A (en) * 1996-11-27 1999-05-11 Case Corporation Method and apparatus for sensing piston position using a dipstick assembly
US5856745A (en) * 1996-12-19 1999-01-05 Caterpillar Inc. Hydraulic cylinder end member arrangement for a piston position sensing system
US5994906A (en) * 1996-12-19 1999-11-30 Caterpillar Inc. Fluid measurement of dielectric property change in hydraulic fluid
US5780743A (en) * 1997-02-13 1998-07-14 Caterpillar Inc. Resonance identification in hydraulic cylinder piston position sensing
US6005395A (en) * 1997-11-12 1999-12-21 Case Corporation Method and apparatus for sensing piston position
US20010037689A1 (en) 2000-03-08 2001-11-08 Krouth Terrance F. Hydraulic actuator piston measurement apparatus and method
EP1269027B1 (de) 2000-03-08 2005-07-27 Rosemount Inc. Bidirektionaler differenzdruck- durchflusssensor
WO2001066954A2 (en) 2000-03-08 2001-09-13 Rosemount Inc. Piston position measuring device
US20010037724A1 (en) 2000-03-08 2001-11-08 Schumacher Mark S. System for controlling hydraulic actuator
US20020077734A1 (en) * 2000-12-19 2002-06-20 Muller Thomas P. Hydraulic cylinder life prediction
US6588313B2 (en) 2001-05-16 2003-07-08 Rosemont Inc. Hydraulic piston position sensor
US6722261B1 (en) 2002-12-11 2004-04-20 Rosemount Inc. Hydraulic piston position sensor signal processing
US6722260B1 (en) 2002-12-11 2004-04-20 Rosemount Inc. Hydraulic piston position sensor
DE102004057769A1 (de) * 2004-11-30 2006-06-01 Mts Mikrowellen-Technologie Und Sensoren Gmbh Abstandmessvorrichtung und Verfahren zur Bestimmung eines Abstands
US8365637B2 (en) * 2007-10-23 2013-02-05 Caterpillar Inc. Drop box for powertrain
US8482607B2 (en) * 2008-03-10 2013-07-09 Timothy David Webster Position sensing of a piston in a hydraulic cylinder using a photo image sensor
US8100045B2 (en) * 2008-10-21 2012-01-24 Clark Equipment Company Hydraulic cylinder rod position sensor
CN111712280B (zh) * 2017-12-21 2022-09-13 赛诺菲 使用无源rf调制的与注射装置使用相关的数据的传输
US10634442B2 (en) * 2018-01-17 2020-04-28 Cubic Corporation Light gun breech position detector
US11505920B2 (en) * 2019-01-08 2022-11-22 Deere & Company Grade control having real time cylinder stop lengths

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1180843A (en) * 1966-02-10 1970-02-11 Yawata Iron & Steel Co A Method for Measuring the Configuration or Thickness of a Metal Body.
US3522527A (en) * 1967-09-13 1970-08-04 British Iron Steel Research Method and apparatus for measuring material thickness
BE759483R (fr) * 1969-12-08 1971-04-30 Commissariat Energie Atomique Procede de mesure d'un deplacement et dispositif en faisant applicatio
SU758006A2 (en) * 1978-02-06 1980-08-23 Sergej V Firsov Differential device for measuring linear dimensions
JPS5537958A (en) * 1978-09-11 1980-03-17 Hiromi Ogasawara Rotation angle detector
US4588953A (en) * 1983-08-11 1986-05-13 General Motors Corporation Microwave piston position location
US4689553A (en) * 1985-04-12 1987-08-25 Jodon Engineering Associates, Inc. Method and system for monitoring position of a fluid actuator employing microwave resonant cavity principles
US4737705A (en) * 1986-11-05 1988-04-12 Caterpillar Inc. Linear position sensor using a coaxial resonant cavity
US5351541A (en) * 1992-01-22 1994-10-04 Charles Stark Draper Laboratories Microwave resonator accelerometer

Also Published As

Publication number Publication date
WO1993007444A1 (en) 1993-04-15
US5471147A (en) 1995-11-28
EP0560894B1 (de) 1996-06-05
DE69120091T2 (de) 1997-01-30
JPH06503419A (ja) 1994-04-14
EP0560894A1 (de) 1993-09-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee