SE9900119L - Detection method and device - Google Patents

Detection method and device

Info

Publication number
SE9900119L
SE9900119L SE9900119A SE9900119A SE9900119L SE 9900119 L SE9900119 L SE 9900119L SE 9900119 A SE9900119 A SE 9900119A SE 9900119 A SE9900119 A SE 9900119A SE 9900119 L SE9900119 L SE 9900119L
Authority
SE
Sweden
Prior art keywords
frequency
electric current
alternating electric
impedance
detected
Prior art date
Application number
SE9900119A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9900119D0 (en
Inventor
Carl Tyren
Original Assignee
Rso 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 Rso Corp filed Critical Rso Corp
Priority to SE9900119A priority Critical patent/SE9900119L/en
Publication of SE9900119D0 publication Critical patent/SE9900119D0/en
Priority to JP2000593969A priority patent/JP2002535856A/en
Priority to EP00902252A priority patent/EP1149313A1/en
Priority to AU23380/00A priority patent/AU2338000A/en
Priority to PCT/SE2000/000089 priority patent/WO2000042450A1/en
Priority to BR0007572-8A priority patent/BR0007572A/en
Priority to CN00802899.0A priority patent/CN1337007A/en
Publication of SE9900119L publication Critical patent/SE9900119L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
    • G01V3/06—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current using ac

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • General Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Near-Field Transmission Systems (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

A method is provided for detecting an article identification tag (30), which has at least one electrically conductive member (31-3n). For each electrically conductive member, an alternating electric current is caused to flow through the member. A frequency of the alternating electric current is varied, and a corresponding variation in impedance of the member is monitored. A discontinuity in the variation in impedance is detected, and the frequency of the alternating electric current is detected, i.e. the frequency at which the discontinuity appears.
SE9900119A 1999-01-18 1999-01-18 Detection method and device SE9900119L (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE9900119A SE9900119L (en) 1999-01-18 1999-01-18 Detection method and device
JP2000593969A JP2002535856A (en) 1999-01-18 2000-01-18 Article identification tag and method of detecting the article identification tag
EP00902252A EP1149313A1 (en) 1999-01-18 2000-01-18 An article identification tag, and a method for the detection thereof
AU23380/00A AU2338000A (en) 1999-01-18 2000-01-18 An article identification tag, and a method for the detection thereof
PCT/SE2000/000089 WO2000042450A1 (en) 1999-01-18 2000-01-18 An article identification tag, and a method for the detection thereof
BR0007572-8A BR0007572A (en) 1999-01-18 2000-01-18 Nameplate and method for detecting it
CN00802899.0A CN1337007A (en) 1999-01-18 2000-01-18 Article identification tag, and method for the detection thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9900119A SE9900119L (en) 1999-01-18 1999-01-18 Detection method and device

Publications (2)

Publication Number Publication Date
SE9900119D0 SE9900119D0 (en) 1999-01-18
SE9900119L true SE9900119L (en) 2000-07-19

Family

ID=20414118

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9900119A SE9900119L (en) 1999-01-18 1999-01-18 Detection method and device

Country Status (7)

Country Link
EP (1) EP1149313A1 (en)
JP (1) JP2002535856A (en)
CN (1) CN1337007A (en)
AU (1) AU2338000A (en)
BR (1) BR0007572A (en)
SE (1) SE9900119L (en)
WO (1) WO2000042450A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080266101A1 (en) * 2007-04-27 2008-10-30 Sensormatic Electronics Corporation Security tag sensor and seccurity meethod for capital assets
AT506311B1 (en) * 2008-05-08 2009-08-15 Univ Graz Tech WIRELESS ENERGY AND DATA TRANSMISSION

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048558A (en) * 1975-08-06 1977-09-13 Clark Goodman Method and apparatus for detecting metal failures in situ
FR2460009B1 (en) * 1979-06-26 1985-07-19 Metalimphy METHOD OF MARKING AND IDENTIFYING OBJECTS MARKED BY ELECTRICALLY CONDUCTIVE ELEMENTS
US4571592A (en) * 1983-03-03 1986-02-18 Cubic Corporation Skin effect antennas
US4982158A (en) * 1988-06-23 1991-01-01 Electric Power Research Institute, Inc. Method and apparatus for magnetic detection of flaws

Also Published As

Publication number Publication date
AU2338000A (en) 2000-08-01
WO2000042450A1 (en) 2000-07-20
BR0007572A (en) 2001-11-06
CN1337007A (en) 2002-02-20
JP2002535856A (en) 2002-10-22
EP1149313A1 (en) 2001-10-31
SE9900119D0 (en) 1999-01-18

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Legal Events

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