BE748053A - ELECTRONIC MONITORING SYSTEM - Google Patents

ELECTRONIC MONITORING SYSTEM

Info

Publication number
BE748053A
BE748053A BE748053DA BE748053A BE 748053 A BE748053 A BE 748053A BE 748053D A BE748053D A BE 748053DA BE 748053 A BE748053 A BE 748053A
Authority
BE
Belgium
Prior art keywords
monitoring system
electronic monitoring
electronic
monitoring
Prior art date
Application number
Other languages
French (fr)
Inventor
P H Cole
R Vaughan
Original Assignee
Unisearch Ltd
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 Unisearch Ltd filed Critical Unisearch Ltd
Publication of BE748053A publication Critical patent/BE748053A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/755—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using delay lines, e.g. acoustic delay lines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/753—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using frequency selective elements, e.g. resonator
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)
BE748053D 1969-04-02 1970-03-27 ELECTRONIC MONITORING SYSTEM BE748053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU5297069 1969-04-02

Publications (1)

Publication Number Publication Date
BE748053A true BE748053A (en) 1970-09-28

Family

ID=3739082

Family Applications (1)

Application Number Title Priority Date Filing Date
BE748053D BE748053A (en) 1969-04-02 1970-03-27 ELECTRONIC MONITORING SYSTEM

Country Status (12)

Country Link
JP (1) JPS5122797B1 (en)
AR (1) AR211833A1 (en)
BE (1) BE748053A (en)
BR (1) BR7017853D0 (en)
CH (1) CH522259A (en)
DE (1) DE2015319C3 (en)
FR (1) FR2038186A1 (en)
GB (1) GB1290097A (en)
IL (1) IL34201A0 (en)
LU (1) LU60651A1 (en)
NL (1) NL172893C (en)
SE (1) SE341363B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481428A (en) * 1981-05-19 1984-11-06 Security Tag Systems, Inc. Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation
US4413254A (en) * 1981-09-04 1983-11-01 Sensormatic Electronics Corporation Combined radio and magnetic energy responsive surveillance marker and system
US4642640A (en) * 1983-04-25 1987-02-10 Sensormatic Electronics Corporation Signal receptor-reradiator and surveillance tag using the same
US4736207A (en) * 1986-01-31 1988-04-05 Sensormatic Electronics Corporation Tag device and method for electronic article surveillance
US5095240A (en) * 1989-11-13 1992-03-10 X-Cyte, Inc. Inductively coupled saw device and method for making the same
US4951057A (en) * 1989-11-13 1990-08-21 X-Cyte, Inc. Inductive input/output coupling for a surface acoustic wave device
US20210261334A1 (en) * 2018-06-11 2021-08-26 Hivetracker Sa A System for Determining the Location of Mobile Units in a Warehouse and a Warehouse Provided with Such System

Also Published As

Publication number Publication date
DE2015319C3 (en) 1980-02-21
DE2015319A1 (en) 1970-10-15
AR211833A1 (en) 1978-03-31
NL172893C (en) 1983-11-01
NL7004749A (en) 1970-10-06
DE2015319B2 (en) 1979-06-28
CH522259A (en) 1972-06-15
FR2038186A1 (en) 1971-01-08
NL172893B (en) 1983-06-01
IL34201A0 (en) 1970-05-21
JPS5122797B1 (en) 1976-07-12
BR7017853D0 (en) 1973-04-17
SE341363B (en) 1971-12-20
LU60651A1 (en) 1971-06-14
GB1290097A (en) 1972-09-20

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Legal Events

Date Code Title Description
RE20 Patent expired

Owner name: UNISEARCH LTD

Effective date: 19900327