CA2346678A1 - Precision sensor for a hydraulic cylinder - Google Patents

Precision sensor for a hydraulic cylinder Download PDF

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Publication number
CA2346678A1
CA2346678A1 CA002346678A CA2346678A CA2346678A1 CA 2346678 A1 CA2346678 A1 CA 2346678A1 CA 002346678 A CA002346678 A CA 002346678A CA 2346678 A CA2346678 A CA 2346678A CA 2346678 A1 CA2346678 A1 CA 2346678A1
Authority
CA
Canada
Prior art keywords
spool
transducer
hydraulic cylinder
lead screw
coupled
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
CA002346678A
Other languages
French (fr)
Other versions
CA2346678C (en
Inventor
Richard O. Glasson
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.)
Copeland Cold Chain LP
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2346678A1 publication Critical patent/CA2346678A1/en
Application granted granted Critical
Publication of CA2346678C publication Critical patent/CA2346678C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F15B15/283—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using a cable wrapped on a drum and attached to the piston
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D5/00—Control of dimensions of material
    • G05D5/02—Control of dimensions of material of thickness, e.g. of rolled material

Abstract

A sensor (218) mountable within a hydraulic cylinder (200) provides a precision signal indicative of the position of the piston (212) utilizing a non-contacting electromechanical transducer. The sensor includes a flexible connector (216) attached between the cylinder piston and a converting element (220) for sensing the displacement of the cylinder piston. The converting element comprises a pick-up spool (310) coupled to the other end of the connector and rotatable about an axis.
The spool is under tension from a spring (317) coupled to the spool. A lead screw (324) engages threads on the interior of the spool, and translates along an axis when the spool rotates. A transducer (323) is disposed to sense the position of the lead screw, and provides an output signal proportional to the motion or position of the movable element. The transducer may be an LVDT or other non-contacting transducer.
CA002346678A 1998-10-20 1999-10-18 Precision sensor for a hydraulic cylinder Expired - Lifetime CA2346678C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US10488698P 1998-10-20 1998-10-20
US60/104,886 1998-10-20
US09/302,701 US6234061B1 (en) 1998-10-20 1999-04-30 Precision sensor for a hydraulic cylinder
US09/302,701 1999-04-30
PCT/US1999/024287 WO2000023717A1 (en) 1998-10-20 1999-10-18 Precision sensor for a hydraulic cylinder

Publications (2)

Publication Number Publication Date
CA2346678A1 true CA2346678A1 (en) 2000-04-27
CA2346678C CA2346678C (en) 2007-11-20

Family

ID=26802046

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002346678A Expired - Lifetime CA2346678C (en) 1998-10-20 1999-10-18 Precision sensor for a hydraulic cylinder

Country Status (7)

Country Link
US (1) US6234061B1 (en)
EP (1) EP1123464B1 (en)
AT (2) ATE298045T1 (en)
AU (1) AU1446900A (en)
CA (1) CA2346678C (en)
DE (2) DE69925851T2 (en)
WO (1) WO2000023717A1 (en)

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US8156798B1 (en) * 2010-07-09 2012-04-17 Hongfeng Bi High pressure high temperature fluid densitometer
US8558408B2 (en) 2010-09-29 2013-10-15 General Electric Company System and method for providing redundant power to a device
US20120134783A1 (en) 2010-11-30 2012-05-31 General Electric Company System and method for operating a compressor
US8278779B2 (en) 2011-02-07 2012-10-02 General Electric Company System and method for providing redundant power to a device
CA2876197C (en) * 2012-06-26 2020-04-21 Control Products, Inc. System and method of manufacture for a linear position sensor
US10006763B2 (en) 2014-06-02 2018-06-26 Reel Power Licensing Corp. Accumulator assembly fixture
US10279443B2 (en) 2014-06-02 2019-05-07 Reel Power Licensing Corp. Accumulator assembly fixture
FR3027037B1 (en) * 2014-10-13 2018-01-26 Groupe Mecalac TOOL HOLDER FOR CONSTRUCTION OR PUBLIC WORKS EQUIPMENT
CN107531297A (en) 2015-03-25 2018-01-02 哥伦比亚车辆有限公司 For conveying and turning to heavy duty method and apparatus
US10358876B2 (en) 2015-07-22 2019-07-23 Columbia Trailer Co., Inc. Method and apparatus for transporting and steering a heavy load
US10113883B1 (en) 2016-01-08 2018-10-30 Control Products, Inc. Hybrid sensor system and method of use
US10563678B2 (en) 2016-08-09 2020-02-18 Industries Mailhot, Inc. Pressure vessel arrangement providing piston position feedback, pressure vessel, and method for providing piston position feedback in a pressure vessel
GB2554655B (en) * 2016-09-30 2019-10-02 Caterpillar Inc A hydraulic actuator arrangement
CA3109051A1 (en) 2018-08-17 2020-02-20 Columbia Trailer Co., Inc. Method and apparatus for transporting and steering a heavy load
US10779506B1 (en) * 2018-10-24 2020-09-22 Matthew J. Ulrich Fully automated, sensor-driven, catch system for a hydraulic livestock squeeze chute
US11692563B2 (en) 2020-01-28 2023-07-04 Caterpillar Paving Products Inc. Milling machine having a valve current based height measurement system
US11255059B2 (en) 2020-01-28 2022-02-22 Caterpillar Paving Products Inc. Milling machine having a non-contact leg-height measurement system
US11629735B2 (en) 2020-01-28 2023-04-18 Caterpillar Paving Products Inc. Milling machine having a fluid flow based height measurement system
US11578737B2 (en) 2020-03-12 2023-02-14 Caterpillar Paving Products Inc. Distance based actuator velocity calibration system
US11566387B2 (en) 2020-03-12 2023-01-31 Caterpillar Paving Products Inc. Relative velocity based actuator velocity calibration system
IT202100028070A1 (en) 2021-11-04 2023-05-04 Tpi S R L “CONTACTLESS LINEAR POSITION TRANSDUCER.”

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Also Published As

Publication number Publication date
DE69925851T2 (en) 2006-05-11
ATE350588T1 (en) 2007-01-15
DE69925851D1 (en) 2005-07-21
CA2346678C (en) 2007-11-20
DE69934729D1 (en) 2007-02-15
EP1123464B1 (en) 2005-06-15
AU1446900A (en) 2000-05-08
WO2000023717A1 (en) 2000-04-27
WO2000023717A9 (en) 2001-02-01
DE69934729T2 (en) 2007-10-18
ATE298045T1 (en) 2005-07-15
EP1123464A1 (en) 2001-08-16
US6234061B1 (en) 2001-05-22

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Effective date: 20191018