FR2405527A1 - Circuit d'annulation du bruit pour un dispositif electronique de securite - Google Patents

Circuit d'annulation du bruit pour un dispositif electronique de securite

Info

Publication number
FR2405527A1
FR2405527A1 FR7827491A FR7827491A FR2405527A1 FR 2405527 A1 FR2405527 A1 FR 2405527A1 FR 7827491 A FR7827491 A FR 7827491A FR 7827491 A FR7827491 A FR 7827491A FR 2405527 A1 FR2405527 A1 FR 2405527A1
Authority
FR
France
Prior art keywords
safety device
cancellation circuit
noise cancellation
electronic safety
representation
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.)
Granted
Application number
FR7827491A
Other languages
English (en)
Other versions
FR2405527B1 (fr
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.)
LICHTBLAU GEORGE
Original Assignee
LICHTBLAU GEORGE
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 LICHTBLAU GEORGE filed Critical LICHTBLAU GEORGE
Publication of FR2405527A1 publication Critical patent/FR2405527A1/fr
Application granted granted Critical
Publication of FR2405527B1 publication Critical patent/FR2405527B1/fr
Granted 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
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2468—Antenna in system and the related signal processing
    • G08B13/2471—Antenna signal processing by receiver or emitter
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

L'invention concerne les dispositifs électroniques de sécurité. Un dispositif destiné à détecter la présence d'une étiquette résonnante 15 dans une zone contrôlée comprend un circuit d'annulation du bruit quasi-stationnaire, 24, qui enregistre périodiquement une représentation du bruît quasi-stationnaire présent dans l'environnement dans lequel est placé le dispositif de sécurité, et qui soustrait cette représentation par rapport au signal reçu, de façon à annuler automatiquement le bruit. Application aux dispositifs de protection contre le vol.
FR7827491A 1977-10-05 1978-09-26 Circuit d'annulation du bruit pour un dispositif electronique de securite Granted FR2405527A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/839,662 US4168496A (en) 1977-10-05 1977-10-05 Quasi-stationary noise cancellation system

Publications (2)

Publication Number Publication Date
FR2405527A1 true FR2405527A1 (fr) 1979-05-04
FR2405527B1 FR2405527B1 (fr) 1983-01-14

Family

ID=25280344

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7827491A Granted FR2405527A1 (fr) 1977-10-05 1978-09-26 Circuit d'annulation du bruit pour un dispositif electronique de securite

Country Status (13)

Country Link
US (1) US4168496A (fr)
JP (2) JPS5477600A (fr)
AU (1) AU518385B2 (fr)
CA (1) CA1118865A (fr)
DE (1) DE2843293C2 (fr)
DK (1) DK158420C (fr)
ES (1) ES473683A1 (fr)
FR (1) FR2405527A1 (fr)
GB (1) GB2005518B (fr)
IT (1) IT1108102B (fr)
MX (1) MX144458A (fr)
SE (1) SE439703B (fr)
ZA (1) ZA784992B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489001A1 (fr) * 1980-08-21 1982-02-26 Knogo Corp Procede et dispositif de detection electronique de vol d'articles

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383995A (en) * 1979-12-28 1995-01-24 Flex Products, Inc. Method of making optical thin flakes and inks incorporating the same
EP0058205B1 (fr) * 1980-08-20 1987-01-14 Secom Co, Ltd. Systeme d'alarme a ultrasons
US4539558A (en) * 1981-11-24 1985-09-03 Shin International, Inc. Antitheft system
WO1983003203A1 (fr) * 1982-03-15 1983-09-29 Progressive Dynamics Procede et appareil pour systemes de detection de vols
US4535323A (en) * 1982-03-15 1985-08-13 Progressive Dynamics, Inc. Preamplifying and signal processing method and apparatus for theft detection systems
US4623877A (en) * 1983-06-30 1986-11-18 Knogo Corporation Method and apparatus for detection of targets in an interrogation zone
CA1234892A (fr) * 1984-02-16 1988-04-05 Pierre Taillefer Systeme de detection pour etiquettes anti-vol
US4668942A (en) * 1984-11-19 1987-05-26 Progressive Dynamics, Inc. Signal analysis apparatus including recursive filter for electromagnetic surveillance system
US4740944A (en) * 1985-02-19 1988-04-26 Laser Magnetic Storage International Company Optical disk phase lock loop with comb filter
US4779077A (en) * 1987-04-13 1988-10-18 Lichtblau G J Continuously armed high reliability pulse train processor
US4854113A (en) * 1987-12-29 1989-08-08 Ford New Holland, Inc. Digital noise cancellation in a metal detector
US4975681A (en) * 1989-12-07 1990-12-04 Sensormatic Electronics Corporation Interfering signal rejection circuitry and electronic article surveillance system and method employing same
US5023598A (en) * 1990-01-02 1991-06-11 Pitney Bowes Inc. Digital signal processor for electronic article gates
US5300922A (en) * 1990-05-29 1994-04-05 Sensormatic Electronics Corporation Swept frequency electronic article surveillance system having enhanced facility for tag signal detection
SE9203479L (sv) * 1992-01-20 1993-07-21 Rso Corp Saett och anordning vid elektronisk identifiering
SE9203258L (sv) * 1992-01-20 1993-07-21 Rso Corp Saett och anordning vid laeges- och vinkelmaetning
SE469673B (sv) * 1992-01-20 1993-08-16 Rso Corp Saett och anordning vid beroeringsfri avkaenning av objekt
US5508684A (en) * 1995-03-02 1996-04-16 Becker; Richard S. Article tag
DE19642985A1 (de) * 1996-10-18 1998-04-23 Esselte Meto Int Gmbh Vorrichtung zur Überwachung eines elektronischen Sicherungselementes in einer Abfragezone
DE19644927A1 (de) * 1996-10-29 1998-04-30 Esselte Meto Int Gmbh Vorrichtung zur Überwachung eines elektronischen Sicherungselementes in einer Abfragezone
DE19647905A1 (de) * 1996-11-20 1998-05-28 Meto International Gmbh Vorrichtung zur Überwachung eines elektronischen Sicherungselementes in einer Abfragezone
US5790031A (en) * 1997-01-13 1998-08-04 Trw Inc. Apparatus and method for sensing a rearward facing child seat with error detection
US6249229B1 (en) 1999-08-16 2001-06-19 Checkpoint Systems, Inc., A Corp. Of Pennsylvania Electronic article security system employing variable time shifts
US6859652B2 (en) 2000-08-02 2005-02-22 Mobile Satellite Ventures, Lp Integrated or autonomous system and method of satellite-terrestrial frequency reuse using signal attenuation and/or blockage, dynamic assignment of frequencies and/or hysteresis
MXPA02001964A (es) 2000-08-02 2003-07-21 Mobile Satellite Ventures Lp Reutilizacion de frecuencia satelital-terrestre coordinada.
US7792488B2 (en) 2000-12-04 2010-09-07 Atc Technologies, Llc Systems and methods for transmitting electromagnetic energy over a wireless channel having sufficiently weak measured signal strength
US6947860B2 (en) * 2002-08-09 2005-09-20 Sensormatic Electronics Corporation Electronic article surveillance system stationary tag response canceller
AU2002951697A0 (en) * 2002-09-27 2002-10-17 Tagsys Australia Pty Ltd Method of Maintaining pseudo-synchranism with a finite length transmitted clock in electronic label systems
NL1026690C2 (nl) * 2004-07-20 2006-01-23 Nedap Nv Elektronisch detectiesysteem voor het detecteren van antidiefstal- en/of identificatielabels.
US7460059B1 (en) * 2006-10-25 2008-12-02 Sandia Corporation Removing interfering clutter associated with radar pulses that an airborne radar receives from a radar transponder
JP5596927B2 (ja) * 2009-02-06 2014-09-24 アルプス電気株式会社 車両用携帯機

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116511A1 (fr) * 1970-12-02 1972-07-13 Knogo Corp
US3810147A (en) * 1971-12-30 1974-05-07 G Lichtblau Electronic security system
US3863244A (en) * 1972-06-14 1975-01-28 Lichtblau G J Electronic security system having improved noise discrimination

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743768A (en) * 1971-04-02 1973-07-03 Halliburton Co Method and apparatus for electronically monitoring a field of view
JPS4877695A (fr) * 1971-12-30 1973-10-18
US3885234A (en) * 1972-03-17 1975-05-20 Uro Electronics Ind Co Ltd Ultrasonic wave type alarm device for depicting a moving object
JPS5034500A (fr) * 1973-07-31 1975-04-02
JPS5623161B2 (fr) * 1973-12-24 1981-05-29
JPS50142057A (fr) * 1974-05-01 1975-11-15
US3988533A (en) * 1974-09-30 1976-10-26 Video Tek, Inc. Video-type universal motion and intrusion detection system
IT1032162B (it) * 1974-12-10 1979-05-30 Cnen Apparecchiatura per registrare in una memoria traiettorie di tracce di oggetti

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116511A1 (fr) * 1970-12-02 1972-07-13 Knogo Corp
US3810147A (en) * 1971-12-30 1974-05-07 G Lichtblau Electronic security system
US3863244A (en) * 1972-06-14 1975-01-28 Lichtblau G J Electronic security system having improved noise discrimination

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489001A1 (fr) * 1980-08-21 1982-02-26 Knogo Corp Procede et dispositif de detection electronique de vol d'articles

Also Published As

Publication number Publication date
CA1118865A (fr) 1982-02-23
GB2005518B (en) 1982-04-21
DK158420C (da) 1990-10-22
DK158420B (da) 1990-05-14
DE2843293C2 (de) 1985-12-05
US4168496A (en) 1979-09-18
SE439703B (sv) 1985-06-24
AU3947178A (en) 1980-03-06
IT7869289A0 (it) 1978-10-04
DK441978A (da) 1979-04-06
ES473683A1 (es) 1979-10-16
SE7810387L (sv) 1979-04-06
JPS6020694U (ja) 1985-02-13
MX144458A (es) 1981-10-16
IT1108102B (it) 1985-12-02
ZA784992B (en) 1979-09-26
FR2405527B1 (fr) 1983-01-14
JPS5477600A (en) 1979-06-21
DE2843293A1 (de) 1979-04-12
GB2005518A (en) 1979-04-19
AU518385B2 (en) 1981-10-01

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