DE2035356C3 - Einrichtung zum Erfassen der Anwesenheit eines hochpermeablen, ferromagnetischen, länglichen Markierungselementes in einer Abfragezone - Google Patents

Einrichtung zum Erfassen der Anwesenheit eines hochpermeablen, ferromagnetischen, länglichen Markierungselementes in einer Abfragezone

Info

Publication number
DE2035356C3
DE2035356C3 DE19702035356 DE2035356A DE2035356C3 DE 2035356 C3 DE2035356 C3 DE 2035356C3 DE 19702035356 DE19702035356 DE 19702035356 DE 2035356 A DE2035356 A DE 2035356A DE 2035356 C3 DE2035356 C3 DE 2035356C3
Authority
DE
Germany
Prior art keywords
field
marking element
signal
coil
zone
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
Application number
DE19702035356
Other languages
German (de)
English (en)
Other versions
DE2035356B2 (de
DE2035356A1 (de
Inventor
Donald Arthur St.Paul Minn. Wright
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of DE2035356A1 publication Critical patent/DE2035356A1/de
Publication of DE2035356B2 publication Critical patent/DE2035356B2/de
Application granted granted Critical
Publication of DE2035356C3 publication Critical patent/DE2035356C3/de
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2468—Antenna in system and the related signal processing
    • G08B13/2477—Antenna or antenna activator circuit
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2468—Antenna in system and the related signal processing
    • G08B13/2474—Antenna or antenna activator geometry, arrangement or layout

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radar Systems Or Details Thereof (AREA)
DE19702035356 1969-07-11 1970-07-10 Einrichtung zum Erfassen der Anwesenheit eines hochpermeablen, ferromagnetischen, länglichen Markierungselementes in einer Abfragezone Expired DE2035356C3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US84097369A 1969-07-11 1969-07-11
US88587469A 1969-12-17 1969-12-17
US5084070A 1970-06-29 1970-06-29

Publications (3)

Publication Number Publication Date
DE2035356A1 DE2035356A1 (de) 1971-02-04
DE2035356B2 DE2035356B2 (de) 1977-06-08
DE2035356C3 true DE2035356C3 (de) 1984-06-28

Family

ID=27367841

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19702035356 Expired DE2035356C3 (de) 1969-07-11 1970-07-10 Einrichtung zum Erfassen der Anwesenheit eines hochpermeablen, ferromagnetischen, länglichen Markierungselementes in einer Abfragezone

Country Status (7)

Country Link
JP (1) JPS511400B1 (https=)
DE (1) DE2035356C3 (https=)
FR (1) FR2055019A5 (https=)
GB (1) GB1330481A (https=)
HK (1) HK36077A (https=)
NL (2) NL177945C (https=)
SE (1) SE377387B (https=)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2161773B1 (https=) * 1971-11-29 1975-08-29 See International
US4134538A (en) * 1976-03-18 1979-01-16 La Societe Metalimphy Process and apparatus for identification of objects
NL7708012A (nl) * 1977-07-19 1979-01-23 Nedap Nv Detectiestelsel.
GB2247383B (en) * 1987-08-28 1992-07-29 Sensormatic Electronics Corp Antenna for use in an article surveillance system
US5541577A (en) * 1995-05-26 1996-07-30 Consolidated Graphic Materials, Inc. Electromagnetic asset protection system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR763681A (fr) * 1933-11-10 1934-05-04 Procédé de repérage des objets par modification d'un champ magnétique
US3292080A (en) * 1964-11-23 1966-12-13 Emmanuel M Trikilis System and method for preventing pilferage by detection of magnetic fields
US3500373A (en) 1966-05-06 1970-03-10 Nat Bank Of North America The Method and apparatus for article theft detection

Also Published As

Publication number Publication date
DE2035356B2 (de) 1977-06-08
DE2035356A1 (de) 1971-02-04
NL177945C (nl) 1985-12-16
HK36077A (en) 1977-07-15
NL177945B (nl) 1985-07-16
JPS511400B1 (https=) 1976-01-16
NL8401703A (nl) 1984-09-03
NL180359C (nl) 1987-02-02
SE377387B (https=) 1975-06-30
NL7010224A (https=) 1971-01-13
GB1330481A (en) 1973-09-19
FR2055019A5 (https=) 1971-05-07

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