GB2247383B - Antenna for use in an article surveillance system - Google Patents
Antenna for use in an article surveillance systemInfo
- Publication number
- GB2247383B GB2247383B GB9119215A GB9119215A GB2247383B GB 2247383 B GB2247383 B GB 2247383B GB 9119215 A GB9119215 A GB 9119215A GB 9119215 A GB9119215 A GB 9119215A GB 2247383 B GB2247383 B GB 2247383B
- Authority
- GB
- United Kingdom
- Prior art keywords
- antenna
- surveillance system
- article surveillance
- article
- surveillance
- 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
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
- G08B13/2408—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 ferromagnetic tags
-
- 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
- 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
- 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
-
- 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
- G08B13/2477—Antenna or antenna activator circuit
-
- 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
- G08B13/2482—EAS methods, e.g. description of flow chart of the detection procedure
-
- 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
- G08B13/2488—Timing issues, e.g. synchronising measures to avoid signal collision, with multiple emitters or a single emitter and receiver
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/04—Screened antennas
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)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Burglar Alarm Systems (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/091,052 US4859991A (en) | 1987-08-28 | 1987-08-28 | Electronic article surveillance system employing time domain and/or frequency domain analysis and computerized operation |
GB8818913A GB2209450B (en) | 1987-08-28 | 1988-08-09 | An electronic article surveillance system |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9119215D0 GB9119215D0 (en) | 1991-10-23 |
GB2247383A GB2247383A (en) | 1992-02-26 |
GB2247383B true GB2247383B (en) | 1992-07-29 |
Family
ID=26294258
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9119213A Expired - Lifetime GB2247381B (en) | 1987-08-28 | 1991-09-06 | An electronic article surveillance system |
GB9119214A Expired - Lifetime GB2247382B (en) | 1987-08-28 | 1991-09-06 | Antenna for use in an article surveillance system |
GB9119215A Expired - Lifetime GB2247383B (en) | 1987-08-28 | 1991-09-06 | Antenna for use in an article surveillance system |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9119213A Expired - Lifetime GB2247381B (en) | 1987-08-28 | 1991-09-06 | An electronic article surveillance system |
GB9119214A Expired - Lifetime GB2247382B (en) | 1987-08-28 | 1991-09-06 | Antenna for use in an article surveillance system |
Country Status (1)
Country | Link |
---|---|
GB (3) | GB2247381B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5387900A (en) * | 1992-11-19 | 1995-02-07 | Sensormatic Electronics Corporation | EAS system with improved processing of antenna signals |
US5373301A (en) * | 1993-01-04 | 1994-12-13 | Checkpoint Systems, Inc. | Transmit and receive antenna having angled crossover elements |
US5699046A (en) * | 1995-11-02 | 1997-12-16 | Sensormatic Electronics Corporation | EAS system employing central and local stations with shared functions |
ES2302679T3 (en) * | 2000-02-21 | 2008-08-01 | N.V. Nederlandsche Apparatenfabriek Nedap | ANTENNA OF AN ELECTROMAGNETIC DETECTION SYSTEM AND ELECTROMAGNETIC DETECTION SYSTEM THAT INCLUDES SUCH ANTENNA. |
US6617856B1 (en) * | 2002-02-15 | 2003-09-09 | Radiodetection Limited | Electronic marker locator system and method |
US7285958B2 (en) | 2004-01-15 | 2007-10-23 | Metrotech Corporation, Inc. | Method and apparatus for digital detection of electronic markers using frequency adaptation |
JP4550447B2 (en) | 2004-02-25 | 2010-09-22 | 独立行政法人科学技術振興機構 | Silyl linker for nucleic acid solid phase synthesis |
US8754771B2 (en) | 2007-04-13 | 2014-06-17 | Alert Metalguard Aps | Method, a device and a system for preventing false alarms in a theft-preventing system |
WO2011044915A1 (en) | 2009-10-16 | 2011-04-21 | Alert Metalguard Aps | An electronic anti-theft protection system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2083978A (en) * | 1980-08-21 | 1982-03-31 | Knogo Corp | Article theft detection |
GB2101456A (en) * | 1980-10-31 | 1983-01-12 | Knogo Corp | Theft detection apparatus using saturable magnetic targets |
US4535323A (en) * | 1982-03-15 | 1985-08-13 | Progressive Dynamics, Inc. | Preamplifying and signal processing method and apparatus for theft detection systems |
US4539558A (en) * | 1981-11-24 | 1985-09-03 | Shin International, Inc. | Antitheft system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS511400B1 (en) * | 1969-07-11 | 1976-01-16 | ||
US4524350A (en) * | 1982-03-15 | 1985-06-18 | Progressive Dynamics, Inc. | Detection logic 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 (en) * | 1984-02-16 | 1988-04-05 | Pierre Taillefer | Security tag detection system |
US4668942A (en) * | 1984-11-19 | 1987-05-26 | Progressive Dynamics, Inc. | Signal analysis apparatus including recursive filter for electromagnetic surveillance system |
-
1991
- 1991-09-06 GB GB9119213A patent/GB2247381B/en not_active Expired - Lifetime
- 1991-09-06 GB GB9119214A patent/GB2247382B/en not_active Expired - Lifetime
- 1991-09-06 GB GB9119215A patent/GB2247383B/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2083978A (en) * | 1980-08-21 | 1982-03-31 | Knogo Corp | Article theft detection |
GB2101456A (en) * | 1980-10-31 | 1983-01-12 | Knogo Corp | Theft detection apparatus using saturable magnetic targets |
US4539558A (en) * | 1981-11-24 | 1985-09-03 | Shin International, Inc. | Antitheft system |
US4535323A (en) * | 1982-03-15 | 1985-08-13 | Progressive Dynamics, Inc. | Preamplifying and signal processing method and apparatus for theft detection systems |
Also Published As
Publication number | Publication date |
---|---|
GB2247382A (en) | 1992-02-26 |
GB2247381B (en) | 1992-08-05 |
GB9119215D0 (en) | 1991-10-23 |
GB2247382B (en) | 1992-08-12 |
GB9119213D0 (en) | 1991-10-23 |
GB9119214D0 (en) | 1991-10-23 |
GB2247381A (en) | 1992-02-26 |
GB2247383A (en) | 1992-02-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Expiry date: 20080808 |