ES2100934T3 - Etiqueta de division de frecuencia teniendo un circuito biresonante acoplado magneticamente. - Google Patents

Etiqueta de division de frecuencia teniendo un circuito biresonante acoplado magneticamente.

Info

Publication number
ES2100934T3
ES2100934T3 ES91306658T ES91306658T ES2100934T3 ES 2100934 T3 ES2100934 T3 ES 2100934T3 ES 91306658 T ES91306658 T ES 91306658T ES 91306658 T ES91306658 T ES 91306658T ES 2100934 T3 ES2100934 T3 ES 2100934T3
Authority
ES
Spain
Prior art keywords
circuit
frequency
resonant
electromagnetic radiation
response
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
ES91306658T
Other languages
English (en)
Inventor
Fred Wade Herman
Ming Ren Lian
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.)
Sensormatic Electronics Corp
Original Assignee
Sensormatic Electronics 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 US07/562,475 external-priority patent/US5065137A/en
Priority claimed from US07/562,471 external-priority patent/US5065138A/en
Application filed by Sensormatic Electronics Corp filed Critical Sensormatic Electronics Corp
Application granted granted Critical
Publication of ES2100934T3 publication Critical patent/ES2100934T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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
    • G08B13/2405—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 characterised by the tag technology used
    • G08B13/2414—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 characterised by the tag technology used using inductive tags
    • G08B13/242—Tag deactivation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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
    • G08B13/2405—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 characterised by the tag technology used
    • G08B13/2422—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 characterised by the tag technology used using acoustic or microwave tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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
    • G08B13/2405—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 characterised by the tag technology used
    • G08B13/2422—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 characterised by the tag technology used using acoustic or microwave tags
    • G08B13/2425—Tag deactivation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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
    • G08B13/2431—Tag circuit details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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 OR 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • General Induction Heating (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Filters And Equalizers (AREA)
  • Magnetic Treatment Devices (AREA)
  • Electronic Switches (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

UN DIVISOR DE FRECUENCIA, PORTATIL Y DE BATERIA MINIMA INCLUYE UN PRIMER CIRCUITO (70) RESONANTE LC QUE ES RESONANTE EN UNA PRIMERA FRECUENCIA PARA RECIBIR UNA RADIACION ELECTROMAGNETICA EN LA PRIMERA FRECUENCIA; Y UN SEGUNDO CIRCUITO RESONANTE LC (74) QUE ES RESONANTE EN UNA SEGUNDA FRECUENCIA QUE ES LA MITAD DE LA PRIMERA FRECUENCIA PARA TRANSMITIR RADIACION ELECTROMAGNETICA EN LA SEGUNDA FRECUENCIA. EL PRIMER CIRCUITO ESTA ACOPLADO SOLO MAGNETICAMENTE AL SEGUNDO CIRCUITO PARA TRANSFERIR ENERGIA AL SEGUNDO CIRCUITO EN RESPUESTA A LA RECEPCION POR EL PRIMER CIRCUITO DE RADIACION ELECTROMAGNETICA EN LA PRIMERA FRECUENCIA. UNO DE LOS CIRCUITOS RESONANTES POR LO MENOS, INCLUYE UN ELEMENTO DE REACTANCIA VARIABLE, TAL COMO UN DIODO DE CAPACITANCIA VARIABLE (D1, D1) O UN VARACTOR . EN UN ELEMENTO DE REACTANCIA VARIABLE (D1) DEL PRIMER CIRCUITO (70), LA REACTANCIA VARIA CON VARIACIONES RECIBIDAS POR EL PRIMER CIRCUITO PARA HACER QUE EL SEGUNDO CIRCUITO VARIE EN REACTANCIA DEBIDO AL ACOPLAMIENTO REACTIVO MUTUO PARA HACER QUE EL SEGUNDO CIRCUITO TRANSMITA RADIACION ELECTROMAGNETICA EN LA SEGUNDA FRECUENCIA EN RESPUESTA A LA ENERGIA TRANSFERIDA DESDE EL PRIMER CIRCUITO EN LA PRIMERA FRECUENCIA. EN UN ELEMENTO DE REACTANCIA VARIABLE (D2) DEL SEGUNDO CIRCUITO (74), LA REACTANCIA VARIA CON VARIACIONES EN ENERGIA TRANSFERIDAS DESDE EL PRIMER CIRCUITO PARA HACER QUE EL SEGUNDO CIRCUITO TRANSMITA RADIACION ELECTROMAGNETICA EN LA SEGUNDA FRECUENCIA EN RESPUESTA A LA ENERGIA TRANSFERIDA DESDE EL PRIMER CIRCUITO EN LA PRIMERA FRECUENCIA. AMBOS CIRCUITOS RESONANTES INCLUYEN BOBINAS DE INDUCTANCIA (L1, L2) QUE ESTAN DISPUESTAS EN UNA VARILLA DE FERRITO (72), PARA REALZAR EL ACOPLAMIENTO MAGNETICO. EL DIVISOR DE FRECUENCIA ESTA INCLUIDO EN UNA ETIQUETA UTILIZADA EN UN SISTEMA DE DETECCION DE PRESENCIA.
ES91306658T 1990-08-03 1991-07-22 Etiqueta de division de frecuencia teniendo un circuito biresonante acoplado magneticamente. Expired - Lifetime ES2100934T3 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/562,475 US5065137A (en) 1990-08-03 1990-08-03 Magnetically-coupled, two-resonant-circuit, frequency-division tag
US07/562,471 US5065138A (en) 1990-08-03 1990-08-03 Magnetically-coupled two-resonant-circuit, frequency divider for presence-detection-system tag

Publications (1)

Publication Number Publication Date
ES2100934T3 true ES2100934T3 (es) 1997-07-01

Family

ID=27072966

Family Applications (1)

Application Number Title Priority Date Filing Date
ES91306658T Expired - Lifetime ES2100934T3 (es) 1990-08-03 1991-07-22 Etiqueta de division de frecuencia teniendo un circuito biresonante acoplado magneticamente.

Country Status (8)

Country Link
EP (1) EP0469769B1 (es)
JP (1) JP3224564B2 (es)
AT (1) ATE152848T1 (es)
AU (1) AU635654B2 (es)
CA (1) CA2047559C (es)
DE (1) DE69125985T2 (es)
ES (1) ES2100934T3 (es)
NO (1) NO912997L (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5241298A (en) * 1992-03-18 1993-08-31 Security Tag Systems, Inc. Electrically-and-magnetically-coupled, batteryless, portable, frequency divider
SE508322C2 (sv) * 1994-02-07 1998-09-28 Leif Aasbrink Larmelement
GB9815118D0 (en) * 1998-07-14 1998-09-09 Clan Holdings Ltd Security tag
US7199717B2 (en) * 2004-02-17 2007-04-03 Sensormatic Electronics Corporation Frequency-division marker for an electronic article surveillance system
US10380857B1 (en) * 2018-03-05 2019-08-13 Sensormatic Electronics, LLC Systems and methods for radio frequency identification enabled deactivation of acousto-magnetic ferrite based marker

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1604219A (en) * 1977-04-28 1981-12-02 Parmeko Ltd Detection systems
US4481428A (en) * 1981-05-19 1984-11-06 Security Tag Systems, Inc. Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation
NL8204802A (nl) * 1982-12-10 1984-07-02 Nedap Nv Detectieplaatje met niet-lineair circuit voor een detectiestelsel.
US4727360A (en) * 1985-09-13 1988-02-23 Security Tag Systems, Inc. Frequency-dividing transponder and use thereof in a presence detection system
US4670740A (en) * 1985-11-04 1987-06-02 Security Tag Systems, Inc. Portable, batteryless, frequency divider consisting of inductor and diode

Also Published As

Publication number Publication date
CA2047559A1 (en) 1992-02-04
DE69125985D1 (de) 1997-06-12
EP0469769B1 (en) 1997-05-07
EP0469769A2 (en) 1992-02-05
AU635654B2 (en) 1993-03-25
NO912997D0 (no) 1991-08-01
EP0469769A3 (en) 1992-12-30
JPH04233696A (ja) 1992-08-21
DE69125985T2 (de) 1997-12-11
JP3224564B2 (ja) 2001-10-29
CA2047559C (en) 1999-07-06
NO912997L (no) 1992-02-04
ATE152848T1 (de) 1997-05-15
AU8132591A (en) 1992-02-06

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