GB2405757A - Absolute position encoder - Google Patents

Absolute position encoder Download PDF

Info

Publication number
GB2405757A
GB2405757A GB0421150A GB0421150A GB2405757A GB 2405757 A GB2405757 A GB 2405757A GB 0421150 A GB0421150 A GB 0421150A GB 0421150 A GB0421150 A GB 0421150A GB 2405757 A GB2405757 A GB 2405757A
Authority
GB
United Kingdom
Prior art keywords
movement
device part
coding pattern
kinematic
patterns
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
GB0421150A
Other versions
GB2405757B (en
GB0421150D0 (en
Inventor
Klaus Biester
Peter Kunow
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.)
Cameron International Corp
Original Assignee
Cooper Cameron Corp
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
Priority claimed from DE2002109058 external-priority patent/DE10209058B4/en
Priority claimed from DE20203298U external-priority patent/DE20203298U1/en
Application filed by Cooper Cameron Corp filed Critical Cooper Cameron Corp
Publication of GB0421150D0 publication Critical patent/GB0421150D0/en
Publication of GB2405757A publication Critical patent/GB2405757A/en
Application granted granted Critical
Publication of GB2405757B publication Critical patent/GB2405757B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G01D5/249—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 using pulse code
    • G01D5/2492—Pulse stream
    • 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
    • G01D5/249—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 using pulse code
    • G01D5/2492—Pulse stream
    • G01D5/2495—Pseudo-random code
    • 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
    • G01D5/26—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34776—Absolute encoders with analogue or digital scales

Abstract

A transducer, a method and a coding pattern for determining a kinematic measurable variable are disclosed. A transducer comprises a first device part which is moveable in or through a corresponding device for oil or natural gas production and a second device part which is stationary relative to said first device part. To detect both the directions of movement and the respective position in a simple constructional and inexpensive way without the need for return movement up to ends of the range of movement, the first and/or second device part comprises a coding pattern which is changing along a direction of movement and of which position-specific patterns can be scanned by a scanning means which is arranged on the respective other device part. By scanning such a specific coding pattern during mutual relative movement of said objects or device parts a corresponding scanning signal can then be converted by an evaluation unit into a kinematic measurable variable. The corresponding coding pattern comprises a plurality of single patterns wherein neighboring single patterns differ from one another by at least one characteristic feature and/or said single pattern has at least one characteristic feature that is changing in the direction of movement.

Description

GB 2405757 A continuation (72) Inventor(s): Klaus Biester Peter Kunow (74)
Agent and/or Address for Service: N.J.Akers & Co Grey Friars, Spring Road, HARPENDEN, Hertfordshire, ALE 3PP, United Kingdom
GB0421150A 2002-03-01 2003-02-28 Transducer, method and coding pattern for determining a kinematic measurable variable Expired - Fee Related GB2405757B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2002109058 DE10209058B4 (en) 2002-03-01 2002-03-01 Method and bit pattern for determining a kinematic measured variable
DE20203298U DE20203298U1 (en) 2002-03-01 2002-03-01 Measurement value transducer, especially a linear displacement transducer for use in a blowout preventer for an oil or gas well, has a bit pattern generator whose signal is detected and evaluated to indicate component position
PCT/EP2003/002078 WO2003074977A1 (en) 2002-03-01 2003-02-28 Absolute position encoder

Publications (3)

Publication Number Publication Date
GB0421150D0 GB0421150D0 (en) 2004-10-27
GB2405757A true GB2405757A (en) 2005-03-09
GB2405757B GB2405757B (en) 2005-11-02

Family

ID=27789717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0421150A Expired - Fee Related GB2405757B (en) 2002-03-01 2003-02-28 Transducer, method and coding pattern for determining a kinematic measurable variable

Country Status (7)

Country Link
US (1) US7091883B2 (en)
AU (1) AU2003206963A1 (en)
BR (1) BR0308140A (en)
DE (1) DE10392297B4 (en)
GB (1) GB2405757B (en)
NO (1) NO20044210L (en)
WO (1) WO2003074977A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7280049B2 (en) * 2004-05-17 2007-10-09 Xerox Corporation Encoder runout error correction circuit
ES2717028T3 (en) 2011-12-28 2019-06-18 Servosense Smc Ltd High resolution absolute encoder
US9470556B2 (en) 2012-10-18 2016-10-18 Cnh Industrial Canada, Ltd. Method and apparatus for sensing position
EP4279874A1 (en) 2022-05-19 2023-11-22 Dr. Johannes Heidenhain GmbH Inductive position measurement device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224603A (en) * 1976-06-09 1980-09-23 Societe D'etude Et De Construction D'appareils De Precision (S.E.C.A.P.) Device for locating the position of a movable component and especially a value-setting component in a franking machine
DE19504307A1 (en) * 1995-02-09 1996-08-14 Siemens Ag Position and/or speed detecting appts.
US5576535A (en) * 1992-06-15 1996-11-19 Bootsman Holding B.V. Position detection system having groups of unique, partially overlapping sequences of scanner readable markings
US5739775A (en) * 1993-07-22 1998-04-14 Bourns, Inc. Digital input and control device
US5918199A (en) * 1997-10-31 1999-06-29 Volvo Construction Equipment Korea Co., Ltd. Absolute position detection method for stroke sensing cylinder
EP0947805A2 (en) * 1998-04-02 1999-10-06 J.C. Bamford Excavators Limited An apparatus for determining the position of a movable mechanical element and method of marking a mechanical element

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5774074A (en) * 1997-01-21 1998-06-30 Hewlett-Packard Company Multi-track position encoder system
US5841274A (en) * 1997-01-29 1998-11-24 Mitutoyo Corporation Induced current absolute position transducer using a code-track-type scale and read head
US6335618B1 (en) * 1999-10-05 2002-01-01 Mitutoyo Corporation Position transducer having position-dependent amplitude encoding applying first and second modulations
DE10012202C2 (en) * 2000-03-13 2002-11-07 Siemens Ag Device for detecting the speed, direction of movement and / or position of a part of the device to be moved
DE10060574A1 (en) * 2000-12-06 2002-06-13 Heidenhain Gmbh Dr Johannes Multi-turn rotary encoder
JP4235425B2 (en) * 2002-09-20 2009-03-11 Ｈｏｙａ株式会社 Photointerrupter position adjustment mechanism
JP4075590B2 (en) * 2002-11-27 2008-04-16 松下電器産業株式会社 Rotating electronic components
JP4039251B2 (en) * 2003-01-16 2008-01-30 松下電器産業株式会社 Rotary encoder
JP3730232B2 (en) * 2003-04-24 2005-12-21 ファナック株式会社 Optical encoder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224603A (en) * 1976-06-09 1980-09-23 Societe D'etude Et De Construction D'appareils De Precision (S.E.C.A.P.) Device for locating the position of a movable component and especially a value-setting component in a franking machine
US5576535A (en) * 1992-06-15 1996-11-19 Bootsman Holding B.V. Position detection system having groups of unique, partially overlapping sequences of scanner readable markings
US5739775A (en) * 1993-07-22 1998-04-14 Bourns, Inc. Digital input and control device
DE19504307A1 (en) * 1995-02-09 1996-08-14 Siemens Ag Position and/or speed detecting appts.
US5918199A (en) * 1997-10-31 1999-06-29 Volvo Construction Equipment Korea Co., Ltd. Absolute position detection method for stroke sensing cylinder
EP0947805A2 (en) * 1998-04-02 1999-10-06 J.C. Bamford Excavators Limited An apparatus for determining the position of a movable mechanical element and method of marking a mechanical element

Also Published As

Publication number Publication date
WO2003074977A1 (en) 2003-09-12
US20050275564A1 (en) 2005-12-15
GB2405757B (en) 2005-11-02
DE10392297T5 (en) 2005-06-02
GB0421150D0 (en) 2004-10-27
NO20044210L (en) 2004-11-30
DE10392297B4 (en) 2007-04-05
BR0308140A (en) 2005-01-11
US7091883B2 (en) 2006-08-15
AU2003206963A1 (en) 2003-09-16

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20150903 AND 20150909

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20170228