ZA832313B - Crossed beam high frequency anti-theft system - Google Patents
Crossed beam high frequency anti-theft systemInfo
- Publication number
- ZA832313B ZA832313B ZA832313A ZA832313A ZA832313B ZA 832313 B ZA832313 B ZA 832313B ZA 832313 A ZA832313 A ZA 832313A ZA 832313 A ZA832313 A ZA 832313A ZA 832313 B ZA832313 B ZA 832313B
- Authority
- ZA
- South Africa
- Prior art keywords
- frequency
- center frequency
- antenna
- displaced
- antennae
- Prior art date
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
- G08B13/2422—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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Automation & Control Theory (AREA)
- Acoustics & Sound (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Burglar Alarm Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
- Aerials With Secondary Devices (AREA)
- Alarm Systems (AREA)
- Circuits Of Receivers In General (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pyrane Compounds (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36771582A | 1982-04-12 | 1982-04-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA832313B true ZA832313B (en) | 1983-12-28 |
Family
ID=23448316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA832313A ZA832313B (en) | 1982-04-12 | 1983-03-30 | Crossed beam high frequency anti-theft system |
Country Status (15)
Country | Link |
---|---|
EP (1) | EP0091581B1 (de) |
JP (1) | JPS5932093A (de) |
KR (1) | KR910000108B1 (de) |
AT (1) | ATE34474T1 (de) |
AU (1) | AU558397B2 (de) |
BR (1) | BR8301775A (de) |
CA (1) | CA1233539A (de) |
DE (1) | DE3376703D1 (de) |
DK (1) | DK153183A (de) |
ES (1) | ES521268A0 (de) |
FI (1) | FI79625C (de) |
MC (1) | MC1521A1 (de) |
NO (1) | NO158390C (de) |
NZ (1) | NZ203790A (de) |
ZA (1) | ZA832313B (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU567604B2 (en) * | 1984-02-15 | 1987-11-26 | Esselte Meto International Gmbh | Method and system for detecting an indicating device |
US5106175A (en) * | 1989-12-28 | 1992-04-21 | At&T Bell Laboratories | Locatable object suitable for underground use and methods of locating same |
JPH07167427A (ja) * | 1993-12-15 | 1995-07-04 | World Seiki:Kk | ガスバーナ装置及びガスオーブン及びガスバーナの燃焼制御方法 |
US6046682A (en) * | 1997-09-29 | 2000-04-04 | Ncr Corporation | Electronic price label including noisemaker and method of locating electronic price labels |
US7576655B2 (en) | 2005-03-29 | 2009-08-18 | Accu-Sort Systems, Inc. | RFID conveyor system and method |
US8854212B2 (en) | 2009-03-30 | 2014-10-07 | Datalogic Automation, Inc. | Radio frequency identification tag identification system |
ES2534702B1 (es) * | 2013-09-24 | 2016-02-09 | Ontech Security, Sl | Sensor de campos electrostáticos y sistema de seguridad en espacios interiores |
CN106980144A (zh) * | 2017-03-22 | 2017-07-25 | 绍兴职业技术学院 | 一种硬标签质量参数检测电路 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO126975B (de) * | 1967-03-30 | 1973-04-16 | John Welsh | |
DE2551348A1 (de) * | 1975-11-15 | 1977-05-18 | Wilhelm Jank | Vorrichtung zur erkennung von resonatormarken |
GB1604220A (en) * | 1978-04-24 | 1981-12-02 | Parmeko Ltd | Detection systems |
CA1145015A (en) * | 1979-05-18 | 1983-04-19 | James H. Stephen | Surveillance systems |
CA1190970A (en) * | 1980-10-09 | 1985-07-23 | Harold B. Williams | Dual frequency anti-theft system |
-
1983
- 1983-03-23 EP EP83102895A patent/EP0091581B1/de not_active Expired
- 1983-03-23 DE DE8383102895T patent/DE3376703D1/de not_active Expired
- 1983-03-23 AT AT83102895T patent/ATE34474T1/de active
- 1983-03-30 ZA ZA832313A patent/ZA832313B/xx unknown
- 1983-04-05 CA CA000425181A patent/CA1233539A/en not_active Expired
- 1983-04-06 NZ NZ203790A patent/NZ203790A/en unknown
- 1983-04-06 DK DK153183A patent/DK153183A/da not_active IP Right Cessation
- 1983-04-06 KR KR1019830001424A patent/KR910000108B1/ko active IP Right Grant
- 1983-04-06 ES ES521268A patent/ES521268A0/es active Granted
- 1983-04-06 BR BR8301775A patent/BR8301775A/pt not_active IP Right Cessation
- 1983-04-06 FI FI831167A patent/FI79625C/fi not_active IP Right Cessation
- 1983-04-07 MC MC831628A patent/MC1521A1/xx unknown
- 1983-04-08 AU AU13242/83A patent/AU558397B2/en not_active Ceased
- 1983-04-11 NO NO831275A patent/NO158390C/no unknown
- 1983-04-12 JP JP58064394A patent/JPS5932093A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
NZ203790A (en) | 1986-06-11 |
CA1233539A (en) | 1988-03-01 |
FI79625C (fi) | 1990-01-10 |
ES8404061A1 (es) | 1984-04-01 |
NO158390C (no) | 1988-08-31 |
MC1521A1 (fr) | 1984-02-10 |
DE3376703D1 (en) | 1988-06-23 |
AU1324283A (en) | 1983-10-20 |
EP0091581A3 (en) | 1986-01-15 |
NO158390B (no) | 1988-05-24 |
BR8301775A (pt) | 1983-12-20 |
AU558397B2 (en) | 1987-01-29 |
FI831167A0 (fi) | 1983-04-06 |
EP0091581A2 (de) | 1983-10-19 |
KR840004597A (ko) | 1984-10-22 |
FI831167L (fi) | 1983-10-13 |
EP0091581B1 (de) | 1988-05-18 |
FI79625B (fi) | 1989-09-29 |
KR910000108B1 (ko) | 1991-01-21 |
NO831275L (no) | 1983-10-13 |
DK153183D0 (da) | 1983-04-06 |
JPS5932093A (ja) | 1984-02-21 |
DK153183A (da) | 1983-10-13 |
ES521268A0 (es) | 1984-04-01 |
ATE34474T1 (de) | 1988-06-15 |
JPS6356588B2 (de) | 1988-11-08 |
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