FI980441A - Förfarande och anordning för mätning av en rörlig banas egenskaper - Google Patents

Förfarande och anordning för mätning av en rörlig banas egenskaper Download PDF

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Publication number
FI980441A
FI980441A FI980441A FI980441A FI980441A FI 980441 A FI980441 A FI 980441A FI 980441 A FI980441 A FI 980441A FI 980441 A FI980441 A FI 980441A FI 980441 A FI980441 A FI 980441A
Authority
FI
Finland
Prior art keywords
measuring
differential coil
track
voltage
moving web
Prior art date
Application number
FI980441A
Other languages
English (en)
Finnish (fi)
Other versions
FI103918B1 (sv
FI103918B (sv
FI980441A0 (fi
Inventor
Hannu Moisio
Mauri Ojala
Original Assignee
Valmet Automation 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 Valmet Automation Inc filed Critical Valmet Automation Inc
Priority to FI980441A priority Critical patent/FI103918B/sv
Publication of FI980441A0 publication Critical patent/FI980441A0/fi
Priority to US09/248,753 priority patent/US6366082B1/en
Publication of FI980441A publication Critical patent/FI980441A/sv
Application granted granted Critical
Publication of FI103918B1 publication Critical patent/FI103918B1/sv
Publication of FI103918B publication Critical patent/FI103918B/sv

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
    • G01D5/14—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 the magnitude of a current or voltage
    • G01D5/20—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 the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—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 the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2291—Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils
    • 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
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
    • G01B7/107—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring objects while moving
    • 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
    • G01D5/14—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 the magnitude of a current or voltage
    • G01D5/20—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 the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—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 the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2053—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 the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by a movable non-ferromagnetic conductive element

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
FI980441A 1998-02-26 1998-02-26 Förfarande och anordning för mätning av en rörlig banas egenskaper FI103918B (sv)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI980441A FI103918B (sv) 1998-02-26 1998-02-26 Förfarande och anordning för mätning av en rörlig banas egenskaper
US09/248,753 US6366082B1 (en) 1998-02-26 1999-02-12 Method and apparatus for determining properties of a moving web with a differential coil sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI980441A FI103918B (sv) 1998-02-26 1998-02-26 Förfarande och anordning för mätning av en rörlig banas egenskaper
FI980441 1998-02-26

Publications (4)

Publication Number Publication Date
FI980441A0 FI980441A0 (fi) 1998-02-26
FI980441A true FI980441A (sv) 1999-08-27
FI103918B1 FI103918B1 (sv) 1999-10-15
FI103918B FI103918B (sv) 1999-10-15

Family

ID=8551033

Family Applications (1)

Application Number Title Priority Date Filing Date
FI980441A FI103918B (sv) 1998-02-26 1998-02-26 Förfarande och anordning för mätning av en rörlig banas egenskaper

Country Status (2)

Country Link
US (1) US6366082B1 (sv)
FI (1) FI103918B (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8589946B2 (en) * 2008-09-08 2013-11-19 International Business Machines Corporation Prevention of browser timeout

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1925904A (en) * 1928-11-24 1933-09-05 Goodrich Co B F Method and apparatus for gauging sheet material
US2102450A (en) * 1933-11-01 1937-12-14 Magnetic Analysis Corp Magnetic analysis
DE1931654B2 (de) * 1969-06-21 1971-11-11 Walzenspaltpositionsregelung fuer walzgerueste
FR2398999A1 (fr) 1977-07-27 1979-02-23 Measurex Corp Comparateur d'epaisseur de matieres en feuille
US4528507A (en) 1981-10-26 1985-07-09 Accuray Corporation Sheet measuring apparatus with two structurally isolated non-contacting surface follower bodies and wireless signal transmission
US4791367A (en) 1987-07-15 1988-12-13 Impact Systems, Inc. Contacting thickness gauge for moving sheet material
US5017869A (en) 1989-12-14 1991-05-21 General Electric Company Swept frequency eddy current system for measuring coating thickness
US5418823A (en) 1994-01-04 1995-05-23 General Electric Company Combined ultrasonic and eddy-current method and apparatus for non-destructive testing of tubular objects to determine thickness of metallic linings or coatings

Also Published As

Publication number Publication date
FI103918B1 (sv) 1999-10-15
FI103918B (sv) 1999-10-15
FI980441A0 (fi) 1998-02-26
US6366082B1 (en) 2002-04-02

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