CA1190970A - Dual frequency anti-theft system - Google Patents
Dual frequency anti-theft systemInfo
- Publication number
- CA1190970A CA1190970A CA000386839A CA386839A CA1190970A CA 1190970 A CA1190970 A CA 1190970A CA 000386839 A CA000386839 A CA 000386839A CA 386839 A CA386839 A CA 386839A CA 1190970 A CA1190970 A CA 1190970A
- Authority
- CA
- Canada
- Prior art keywords
- frequency
- antenna
- signal
- signals
- radio frequency
- 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
Links
- 230000009977 dual effect Effects 0.000 title description 4
- 239000013078 crystal Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 13
- 230000007717 exclusion Effects 0.000 claims 1
- 230000000977 initiatory effect Effects 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract description 13
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 239000004065 semiconductor Substances 0.000 abstract description 4
- 230000004044 response Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 230000035945 sensitivity Effects 0.000 description 10
- 238000003491 array Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
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- 230000005855 radiation Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000005686 electrostatic field Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 108010033040 Histones Proteins 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000002844 continuous effect Effects 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- LYZQCTRTDQFROA-UHFFFAOYSA-N sodium 4-hydroxy-7-[[5-hydroxy-7-sulfo-6-[(6-sulfonaphthalen-2-yl)diazenyl]naphthalen-2-yl]carbamoylamino]-3-phenyldiazenylnaphthalene-2-sulfonic acid Chemical group C1=CC=C(C=C1)N=NC2=C(C=C3C=C(C=CC3=C2O)NC(=O)NC4=CC5=CC(=C(C(=C5C=C4)O)N=NC6=CC7=C(C=C6)C=C(C=C7)S(=O)(=O)O)S(=O)(=O)O)S(=O)(=O)O.[Na+] LYZQCTRTDQFROA-UHFFFAOYSA-N 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 101150036453 sur-2 gene Proteins 0.000 description 1
- 230000000451 tissue damage Effects 0.000 description 1
- 231100000827 tissue damage Toxicity 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
- 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)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- Burglar Alarm Systems (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19557280A | 1980-10-09 | 1980-10-09 | |
| US06/195,572 | 1980-10-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1190970A true CA1190970A (en) | 1985-07-23 |
Family
ID=22721923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000386839A Expired CA1190970A (en) | 1980-10-09 | 1981-09-28 | Dual frequency anti-theft system |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0062056A4 (en, 2012) |
| JP (1) | JPH0353678B2 (en, 2012) |
| AU (1) | AU552568B2 (en, 2012) |
| BR (1) | BR8108829A (en, 2012) |
| CA (1) | CA1190970A (en, 2012) |
| DK (1) | DK161172C (en, 2012) |
| ES (1) | ES8207351A1 (en, 2012) |
| FI (1) | FI73532C (en, 2012) |
| IT (1) | IT1142881B (en, 2012) |
| NZ (1) | NZ198497A (en, 2012) |
| WO (1) | WO1982001437A1 (en, 2012) |
| ZA (1) | ZA816937B (en, 2012) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3376703D1 (en) * | 1982-04-12 | 1988-06-23 | Ici America Inc | Crossed beam high frequency anti-theft system |
| CA1236542A (en) * | 1983-08-02 | 1988-05-10 | Harold B. Williams | Electronic article surveillance system having microstrip antennas |
| US5349332A (en) * | 1992-10-13 | 1994-09-20 | Sensormatic Electronics Corportion | EAS system with requency hopping |
| US5347280A (en) * | 1993-07-02 | 1994-09-13 | Texas Instruments Deutschland Gmbh | Frequency diversity transponder arrangement |
| US5831530A (en) * | 1994-12-30 | 1998-11-03 | Lace Effect, Llc | Anti-theft vehicle system |
| US5798693A (en) * | 1995-06-07 | 1998-08-25 | Engellenner; Thomas J. | Electronic locating systems |
| US8358209B2 (en) * | 2005-06-03 | 2013-01-22 | Sensomatic Electronics, LLC | Techniques for detecting RFID tags in electronic article surveillance systems using frequency mixing |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO126975B (en, 2012) * | 1967-03-30 | 1973-04-16 | John Welsh | |
| US3631484A (en) * | 1969-07-30 | 1971-12-28 | Microlab Fxr | Harmonic detection system |
| US3707711A (en) * | 1970-04-02 | 1972-12-26 | Peter Harold Cole | Electronic surveillance system |
| US3895368A (en) * | 1972-08-09 | 1975-07-15 | Sensormatic Electronics Corp | Surveillance system and method utilizing both electrostatic and electromagnetic fields |
| GB1586069A (en) * | 1976-11-15 | 1981-03-18 | Nedap Nv | Detection systems |
| NL7804417A (nl) * | 1977-04-28 | 1978-10-31 | Parmeko Ltd | Detectiestelsel voor het bewaken van de positie van een artikel in een controlezone. |
| US4139844A (en) * | 1977-10-07 | 1979-02-13 | Sensormatic Electronics Corporation | Surveillance method and system with electromagnetic carrier and plural range limiting signals |
| ZA7994B (en) * | 1978-01-11 | 1980-01-30 | Tag Radionics Ltd | Presence sensing system |
| US4249167A (en) * | 1979-06-05 | 1981-02-03 | Magnavox Government And Industrial Electronics Company | Apparatus and method for theft detection system having different frequencies |
-
1981
- 1981-09-28 CA CA000386839A patent/CA1190970A/en not_active Expired
- 1981-09-29 NZ NZ198497A patent/NZ198497A/en unknown
- 1981-10-01 EP EP19810902853 patent/EP0062056A4/en not_active Ceased
- 1981-10-01 JP JP56503332A patent/JPH0353678B2/ja not_active Expired - Lifetime
- 1981-10-01 WO PCT/US1981/001335 patent/WO1982001437A1/en not_active Application Discontinuation
- 1981-10-01 BR BR8108829A patent/BR8108829A/pt unknown
- 1981-10-01 AU AU77219/81A patent/AU552568B2/en not_active Ceased
- 1981-10-07 ZA ZA816937A patent/ZA816937B/xx unknown
- 1981-10-08 ES ES506117A patent/ES8207351A1/es not_active Expired
- 1981-10-08 IT IT49451/81A patent/IT1142881B/it active
-
1982
- 1982-06-02 FI FI821956A patent/FI73532C/fi not_active IP Right Cessation
- 1982-06-09 DK DK258082A patent/DK161172C/da not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU552568B2 (en) | 1986-06-05 |
| ES506117A0 (es) | 1982-09-01 |
| ES8207351A1 (es) | 1982-09-01 |
| JPH0353678B2 (en, 2012) | 1991-08-15 |
| IT8149451A0 (it) | 1981-10-08 |
| BR8108829A (pt) | 1982-08-24 |
| IT1142881B (it) | 1986-10-15 |
| EP0062056A4 (en) | 1985-06-06 |
| FI73532C (fi) | 1987-10-09 |
| EP0062056A1 (en) | 1982-10-13 |
| DK258082A (da) | 1982-06-09 |
| NZ198497A (en) | 1985-08-30 |
| ZA816937B (en) | 1982-11-24 |
| FI821956A0 (fi) | 1982-06-02 |
| WO1982001437A1 (en) | 1982-04-29 |
| FI73532B (fi) | 1987-06-30 |
| AU7721981A (en) | 1982-05-11 |
| DK161172C (da) | 1991-11-25 |
| JPS57501550A (en, 2012) | 1982-08-26 |
| DK161172B (da) | 1991-06-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |