NL8104644A - Diefstaldetectieinrichting waarbij van verzadigbare magnetische doelwitelementen wordt gebruik gemaakt. - Google Patents
Diefstaldetectieinrichting waarbij van verzadigbare magnetische doelwitelementen wordt gebruik gemaakt. Download PDFInfo
- Publication number
- NL8104644A NL8104644A NL8104644A NL8104644A NL8104644A NL 8104644 A NL8104644 A NL 8104644A NL 8104644 A NL8104644 A NL 8104644A NL 8104644 A NL8104644 A NL 8104644A NL 8104644 A NL8104644 A NL 8104644A
- Authority
- NL
- Netherlands
- Prior art keywords
- antenna
- circuit
- theft
- receiving antenna
- detection device
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title claims description 64
- 239000003990 capacitor Substances 0.000 claims description 31
- 238000004804 winding Methods 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 230000001939 inductive effect Effects 0.000 claims description 12
- 230000007423 decrease Effects 0.000 claims description 11
- 239000000696 magnetic material Substances 0.000 claims description 9
- 229920006395 saturated elastomer Polymers 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 230000001960 triggered effect Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 241000158147 Sator Species 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000000415 inactivating effect Effects 0.000 claims 3
- 238000012544 monitoring process Methods 0.000 claims 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 230000013011 mating Effects 0.000 claims 1
- 230000008685 targeting Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 23
- 230000001360 synchronised effect Effects 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 230000002051 biphasic effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000010363 phase shift Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- JNUZADQZHYFJGW-JOCHJYFZSA-N (2R)-N-[3-[5-fluoro-2-(2-fluoro-3-methylsulfonylanilino)pyrimidin-4-yl]-1H-indol-7-yl]-3-methoxy-2-(4-methylpiperazin-1-yl)propanamide Chemical compound FC=1C(=NC(=NC=1)NC1=C(C(=CC=C1)S(=O)(=O)C)F)C1=CNC2=C(C=CC=C12)NC([C@@H](COC)N1CCN(CC1)C)=O JNUZADQZHYFJGW-JOCHJYFZSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 244000291564 Allium cepa Species 0.000 description 1
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 1
- 101000869592 Daucus carota Major allergen Dau c 1 Proteins 0.000 description 1
- 101000650136 Homo sapiens WAS/WASL-interacting protein family member 3 Proteins 0.000 description 1
- 241000995105 Mycobacterium phage Henry Species 0.000 description 1
- 240000008881 Oenanthe javanica Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 102100027539 WAS/WASL-interacting protein family member 3 Human genes 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 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
- G08B13/2408—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
- 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
- G08B13/2488—Timing issues, e.g. synchronising measures to avoid signal collision, with multiple emitters or a single emitter and receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/22—Capacitive coupling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
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)
- Computer Networks & Wireless Communication (AREA)
- Burglar Alarm Systems (AREA)
- Near-Field Transmission Systems (AREA)
- Geophysics And Detection Of Objects (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US20400580 | 1980-10-31 | ||
| US06/204,005 US4384281A (en) | 1980-10-31 | 1980-10-31 | Theft detection apparatus using saturable magnetic targets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8104644A true NL8104644A (nl) | 1982-05-17 |
Family
ID=22756220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8104644A NL8104644A (nl) | 1980-10-31 | 1981-10-13 | Diefstaldetectieinrichting waarbij van verzadigbare magnetische doelwitelementen wordt gebruik gemaakt. |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4384281A (de) |
| JP (1) | JPS57134789A (de) |
| AU (1) | AU539605B2 (de) |
| BE (1) | BE890920A (de) |
| CA (1) | CA1168727A (de) |
| DE (1) | DE3143002A1 (de) |
| FR (1) | FR2493531B1 (de) |
| GB (4) | GB2087197B (de) |
| IT (1) | IT1142894B (de) |
| NL (1) | NL8104644A (de) |
| SE (1) | SE8106399L (de) |
| ZA (1) | ZA816599B (de) |
Families Citing this family (50)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4539558A (en) * | 1981-11-24 | 1985-09-03 | Shin International, Inc. | Antitheft system |
| US4524350A (en) * | 1982-03-15 | 1985-06-18 | Progressive Dynamics, Inc. | Detection logic and signal processing method and apparatus for theft detection systems |
| GB2133660B (en) * | 1982-11-09 | 1986-07-30 | Tag Radionics Ltd | Transponder detection systems |
| US4553136A (en) * | 1983-02-04 | 1985-11-12 | Allied Corporation | Amorphous antipilferage marker |
| US4623877A (en) * | 1983-06-30 | 1986-11-18 | Knogo Corporation | Method and apparatus for detection of targets in an interrogation zone |
| US4665387A (en) * | 1983-07-13 | 1987-05-12 | Knogo Corporation | Method and apparatus for target deactivation and reactivation in article surveillance systems |
| CA1234892A (en) * | 1984-02-16 | 1988-04-05 | Pierre Taillefer | Security tag detection system |
| US4642613A (en) * | 1984-03-16 | 1987-02-10 | Knogo Corporation | Electronic theft detection apparatus with responder elements on protected articles |
| US4583083A (en) * | 1984-06-28 | 1986-04-15 | Bogasky John J | Checkout station to reduce retail theft |
| GB2164824A (en) * | 1984-09-20 | 1986-03-26 | Stc Plc | Access control system |
| US4622542A (en) * | 1985-06-26 | 1986-11-11 | Controlled Information Corporation | Magnetic article surveillance system, method and coded marker |
| US4683461A (en) * | 1985-09-17 | 1987-07-28 | Allied Corporation | Inductive magnetic field generator |
| US4658241A (en) * | 1985-09-17 | 1987-04-14 | Allied Corporation | Surveillance system including transmitter and receiver synchronized by power line zero crossings |
| DE3600307A1 (de) * | 1986-01-08 | 1987-07-09 | Horst Merchel | Transportwagen fuer einkaufsgut oder reisegepaeck |
| DK161227C (da) * | 1986-01-27 | 1991-11-25 | Antonson Security Denmark Aps | Apparat til synkronisering af tyveridetektorer |
| US4684930A (en) * | 1986-03-18 | 1987-08-04 | Knogo Corporation | Method and apparatus for deactivating targets used in electromagnetic type article surveillance systems |
| US4779076A (en) * | 1987-05-20 | 1988-10-18 | Controlled Information Corp. | Deactivatable coded marker and magnetic article surveillance system |
| GB2247381B (en) * | 1987-08-28 | 1992-08-05 | Sensormatic Electronics Corp | An electronic article surveillance system |
| US4859991A (en) * | 1987-08-28 | 1989-08-22 | Sensormatic Electronics Corporation | Electronic article surveillance system employing time domain and/or frequency domain analysis and computerized operation |
| US4813564A (en) * | 1988-02-25 | 1989-03-21 | Westinghouse Electric Corp. | Package |
| NL8800546A (nl) * | 1988-03-04 | 1989-10-02 | Nedap Nv | Eenwindingantennespoel voor draadloos electromagnetisch detectiesysteem. |
| US5057095A (en) * | 1989-11-16 | 1991-10-15 | Fabian Carl E | Surgical implement detector utilizing a resonant marker |
| US5029291A (en) * | 1990-04-10 | 1991-07-02 | Knogo Corporation | Electromagnetic sensor element and methods and apparatus for making and using same |
| NL9100026A (nl) * | 1991-01-09 | 1992-08-03 | Texas Instruments Holland | Ondervraagstation voor het identificeren van over een transportbaan voortbewogen objecten. |
| NL9100111A (nl) * | 1991-01-23 | 1992-08-17 | Texas Instruments Holland | Antennestelsel voor een ondervraagstation voor het identificeren van objecten. |
| DE4200082A1 (de) * | 1992-01-03 | 1993-07-08 | Minnesota Mining & Mfg | Vorrichtung und verfahren zum erkennen eines magnetisierbaren markierungselementes |
| US5883968A (en) * | 1994-07-05 | 1999-03-16 | Aw Computer Systems, Inc. | System and methods for preventing fraud in retail environments, including the detection of empty and non-empty shopping carts |
| US5552778A (en) * | 1994-11-23 | 1996-09-03 | International Business Machines Corporation | Multibit bimorph magnetic tags using acoustic or magnetic interrogation for identification of an object coupled thereto |
| US5602528A (en) * | 1995-06-20 | 1997-02-11 | Marian Rubber Products Company, Inc. | Theft detection marker and method |
| US5812065A (en) | 1995-08-14 | 1998-09-22 | International Business Machines Corporation | Modulation of the resonant frequency of a circuit using an energy field |
| US7123129B1 (en) | 1995-08-14 | 2006-10-17 | Intermec Ip Corp. | Modulation of the resonant frequency of a circuit using an energy field |
| US5703565A (en) * | 1996-02-23 | 1997-12-30 | Sensormatic Electronics Corporation | Transformer coupled switching transmitter for electronic article surveillance system |
| US5653192A (en) * | 1996-03-06 | 1997-08-05 | Alfa Laval Agri Inc. | Livestock identification apparatus |
| DE19621823A1 (de) * | 1996-05-31 | 1997-12-04 | Vendoret Holding Sa | Pfandkarte mit Sender |
| US5751255A (en) * | 1996-06-07 | 1998-05-12 | Carter, Jr.; Philip S. | Electrically small receiving antennas |
| US6362737B1 (en) * | 1998-06-02 | 2002-03-26 | Rf Code, Inc. | Object Identification system with adaptive transceivers and methods of operation |
| US6307468B1 (en) * | 1999-07-20 | 2001-10-23 | Avid Identification Systems, Inc. | Impedance matching network and multidimensional electromagnetic field coil for a transponder interrogator |
| DE10139502C1 (de) * | 2001-08-10 | 2003-03-20 | Diehl Munitionssysteme Gmbh | Verfahren und Vorrichtung zum Auffinden von Streumunition-Blindgängern |
| AU2002342054A1 (en) | 2001-10-10 | 2003-04-22 | Ranger Security Detectors Inc. | System and method for scanning individuals for illicit objects |
| US20040102870A1 (en) * | 2002-11-26 | 2004-05-27 | Andersen Scott Paul | RFID enabled paper rolls and system and method for tracking inventory |
| US7864107B1 (en) | 2005-07-30 | 2011-01-04 | Rockwell Collins, Inc. | RF receiver sensing by harmonic generation |
| US7639178B1 (en) * | 2005-11-04 | 2009-12-29 | Rockwell Collins, Inc. | System and method for detecting receivers |
| US8143997B2 (en) * | 2008-06-30 | 2012-03-27 | International Business Machines Corporation | System for self-service checkout inventory control |
| US20100186525A1 (en) * | 2009-01-26 | 2010-07-29 | Chris Mashburn | Wheelchair and Method of Security Screening a Wheelchair |
| JP2014030184A (ja) * | 2012-07-06 | 2014-02-13 | Panasonic Corp | 通信装置及び無線通信システム |
| US9424724B2 (en) | 2013-08-02 | 2016-08-23 | Bibliotheca Rfid Library Systems Ag | Single turn magnetic drive loop for electronic article surveillance |
| ES2667121B2 (es) * | 2017-12-27 | 2018-11-05 | Universidad Politécnica de Madrid | Sistema inductivo de transmisión/recepción de datos mediante bloqueo de la generación de armónicos de un núcleo ferromagnético |
| GB201805257D0 (en) | 2018-03-29 | 2018-05-16 | Nicoventures Holdings Ltd | An aerosol delivery device, an article for use therewith, and a method of identifying an article |
| CN108595995A (zh) * | 2018-05-02 | 2018-09-28 | 北京紫光微电子系统有限公司 | 一种用于中频射频识别卡的检测天线系统及检测方法 |
| USD867192S1 (en) | 2018-06-06 | 2019-11-19 | Donald R. Sweeney | Metal detector |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1394560A (en) * | 1916-11-27 | 1921-10-25 | Frederick A Xolster | Apparatus for transmitting radiant energy |
| FR763681A (fr) * | 1933-11-10 | 1934-05-04 | Procédé de repérage des objets par modification d'un champ magnétique | |
| US2267047A (en) * | 1940-02-19 | 1941-12-23 | Johnson Lab Inc | Signal collecting system for radio receivers and the like |
| GB1217581A (en) * | 1967-01-24 | 1970-12-31 | Mitsubishi Electric Corp | An inverter device |
| US3673437A (en) * | 1970-06-29 | 1972-06-27 | Minnesota Mining & Mfg | Damped sinusoidal current pulse generator and method |
| US3737735A (en) * | 1972-02-04 | 1973-06-05 | Minnesota Mining & Mfg | Autotransformer assisted resonated energy transfer circuit |
| US3820103A (en) * | 1972-12-15 | 1974-06-25 | Stop Loss Inc | System for detecting an object within a magnetic field |
| US3820104A (en) * | 1972-12-15 | 1974-06-25 | Stop Loss Inc | Method and system for detecting an object within a magnetic field interrogation zone |
| US3896425A (en) * | 1973-10-16 | 1975-07-22 | Tyco Laboratories Inc | Proximity detector |
| US4074249A (en) * | 1977-02-04 | 1978-02-14 | Knogo Corporation | Magnetic detection means |
| DE2709522C3 (de) * | 1977-03-04 | 1980-02-21 | Woerl Geb. Mueller, Waltraud, 8031 Stockdorf | Anlage zur Meldung von Markieningskörpern |
| US4118693A (en) * | 1977-05-09 | 1978-10-03 | Knogo Corporation | Method and apparatus for producing uniform electromagnetic fields in an article detection system |
| US4135183A (en) * | 1977-05-24 | 1979-01-16 | Minnesota Mining And Manufacturing Company | Antipilferage system utilizing "figure-8" shaped field producing and detector coils |
| US4243980A (en) * | 1978-02-17 | 1981-01-06 | Lichtblau G J | Antenna system for electronic security installations |
| US4260990A (en) * | 1979-11-08 | 1981-04-07 | Lichtblau G J | Asymmetrical antennas for use in electronic security systems |
| US4251808A (en) * | 1979-11-15 | 1981-02-17 | Lichtblau G J | Shielded balanced loop antennas for electronic security systems |
-
1980
- 1980-10-31 US US06/204,005 patent/US4384281A/en not_active Expired - Lifetime
-
1981
- 1981-09-21 GB GB8128485A patent/GB2087197B/en not_active Expired
- 1981-09-21 GB GB08218334A patent/GB2101455B/en not_active Expired
- 1981-09-21 GB GB08218333A patent/GB2101454B/en not_active Expired
- 1981-09-21 GB GB08218335A patent/GB2101456B/en not_active Expired
- 1981-09-23 ZA ZA816599A patent/ZA816599B/xx unknown
- 1981-10-09 AU AU76210/81A patent/AU539605B2/en not_active Ceased
- 1981-10-13 NL NL8104644A patent/NL8104644A/nl not_active Application Discontinuation
- 1981-10-15 IT IT49490/81A patent/IT1142894B/it active
- 1981-10-19 CA CA000388225A patent/CA1168727A/en not_active Expired
- 1981-10-29 SE SE8106399A patent/SE8106399L/xx not_active Application Discontinuation
- 1981-10-29 DE DE19813143002 patent/DE3143002A1/de not_active Ceased
- 1981-10-29 BE BE0/206392A patent/BE890920A/fr not_active IP Right Cessation
- 1981-10-30 FR FR8120472A patent/FR2493531B1/fr not_active Expired
- 1981-10-31 JP JP56173737A patent/JPS57134789A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2493531B1 (fr) | 1985-11-22 |
| GB2101456B (en) | 1984-05-23 |
| IT8149490A0 (it) | 1981-10-15 |
| US4384281A (en) | 1983-05-17 |
| DE3143002A1 (de) | 1982-05-19 |
| CA1168727A (en) | 1984-06-05 |
| GB2101455B (en) | 1984-05-23 |
| GB2087197B (en) | 1984-05-23 |
| ZA816599B (en) | 1983-02-23 |
| FR2493531A1 (fr) | 1982-05-07 |
| JPS57134789A (en) | 1982-08-20 |
| AU539605B2 (en) | 1984-10-04 |
| AU7621081A (en) | 1982-05-06 |
| GB2101454B (en) | 1984-05-23 |
| GB2087197A (en) | 1982-05-19 |
| IT1142894B (it) | 1986-10-15 |
| GB2101455A (en) | 1983-01-12 |
| BE890920A (fr) | 1982-04-29 |
| GB2101456A (en) | 1983-01-12 |
| GB2101454A (en) | 1983-01-12 |
| SE8106399L (sv) | 1982-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NL8104644A (nl) | Diefstaldetectieinrichting waarbij van verzadigbare magnetische doelwitelementen wordt gebruik gemaakt. | |
| EP0130286B1 (de) | Verfahren und Einrichtung zum Erkennen von Markierungselementen in einer Überwachungszone | |
| US4476459A (en) | Theft detection method and apparatus in which the decay of a resonant circuit is detected | |
| US3820104A (en) | Method and system for detecting an object within a magnetic field interrogation zone | |
| JPH0782592B2 (ja) | 物品の磁気監視のための方式及び装置 | |
| US3820103A (en) | System for detecting an object within a magnetic field | |
| US4063229A (en) | Article surveillance | |
| AU608720B2 (en) | Load isolated article surveillance system and antenna assembly | |
| US6362739B1 (en) | Passive security device for detecting ferromagnetic objects | |
| US3740742A (en) | Method and apparatus for actuating an electric circuit | |
| EP0319637B1 (de) | Magnetisches Diebstahl- bzw. Einbruch-Sicherungssystem sowie hierfür geeignetes Sensor-Metallelement | |
| NL8104499A (nl) | Inrichting voor het detecteren van de aanwezigheid van een object in een onder toezicht staand gebied. | |
| GB1604219A (en) | Detection systems | |
| GB1585303A (en) | System and method for detecting the unauthorised passage of articles through an interrogation zone and an apparatus for and method of producing an interrogation signal in said zone | |
| NL8103236A (nl) | Detectiestelsel voor het voorkomen van het stelen van artikelen. | |
| US5726628A (en) | Metal detector system | |
| JP6061352B2 (ja) | 金属導体乱れ検出装置および方法 | |
| NL8900658A (nl) | Hoogfrequent winkeldiefstaldetectiesysteem volgens het transmissieprincipe. | |
| CN109478358B (zh) | 用于检测检测区域中的金属物体的方法、设备和系统 | |
| NL8401703A (nl) | Inrichting voor het detecteren van de identiteit van voorwerpen. | |
| JPH0417514Y2 (de) | ||
| JPH0355878B2 (de) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BA | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| BC | A request for examination has been filed | ||
| A85 | Still pending on 85-01-01 | ||
| BV | The patent application has lapsed |