DE60041086D1 - Digitales wirbelstrom grenztastsystem;apparat und verfahren - Google Patents

Digitales wirbelstrom grenztastsystem;apparat und verfahren

Info

Publication number
DE60041086D1
DE60041086D1 DE60041086T DE60041086T DE60041086D1 DE 60041086 D1 DE60041086 D1 DE 60041086D1 DE 60041086 T DE60041086 T DE 60041086T DE 60041086 T DE60041086 T DE 60041086T DE 60041086 D1 DE60041086 D1 DE 60041086D1
Authority
DE
Germany
Prior art keywords
bording
digital switch
switch current
digital
calibration method
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 - Lifetime
Application number
DE60041086T
Other languages
English (en)
Inventor
Rich Slates
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.)
BN CORP
Original Assignee
BN 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
Application filed by BN CORP filed Critical BN CORP
Application granted granted Critical
Publication of DE60041086D1 publication Critical patent/DE60041086D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01D5/14—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
    • G01D5/2006—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 self-induction of one or more coils
    • G01D5/202—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 self-induction of one or more coils by movable a non-ferromagnetic conductive element
    • 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
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • 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
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
    • 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
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
DE60041086T 1999-10-22 2000-10-17 Digitales wirbelstrom grenztastsystem;apparat und verfahren Expired - Lifetime DE60041086D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/425,830 US6346807B1 (en) 1999-10-22 1999-10-22 Digital eddy current proximity system: apparatus and method
PCT/US2000/041257 WO2001029500A2 (en) 1999-10-22 2000-10-17 A digital eddy current proximity system: apparatus and method

Publications (1)

Publication Number Publication Date
DE60041086D1 true DE60041086D1 (de) 2009-01-22

Family

ID=23688208

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60041086T Expired - Lifetime DE60041086D1 (de) 1999-10-22 2000-10-17 Digitales wirbelstrom grenztastsystem;apparat und verfahren

Country Status (8)

Country Link
US (18) US6346807B1 (de)
EP (1) EP1247111B1 (de)
JP (1) JP2003512609A (de)
AT (1) ATE417278T1 (de)
AU (1) AU2467001A (de)
DE (1) DE60041086D1 (de)
DK (1) DK1247111T3 (de)
WO (1) WO2001029500A2 (de)

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US6765395B2 (en) 2004-07-20
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US20030222639A1 (en) 2003-12-04
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EP1247111A4 (de) 2005-12-21
US20030206000A1 (en) 2003-11-06
WO2001029500A2 (en) 2001-04-26
US6798194B2 (en) 2004-09-28
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US6819122B2 (en) 2004-11-16
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