EP0748492B1 - Procede et dispositif pour la detection, l'identification et la protection de biens notamment contre le vol - Google Patents
Procede et dispositif pour la detection, l'identification et la protection de biens notamment contre le vol Download PDFInfo
- Publication number
- EP0748492B1 EP0748492B1 EP95943258A EP95943258A EP0748492B1 EP 0748492 B1 EP0748492 B1 EP 0748492B1 EP 95943258 A EP95943258 A EP 95943258A EP 95943258 A EP95943258 A EP 95943258A EP 0748492 B1 EP0748492 B1 EP 0748492B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- transmitter
- receiver
- tag
- circuit
- 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
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000003213 activating effect Effects 0.000 claims abstract 11
- 230000001960 triggered effect Effects 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 19
- 238000009434 installation Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 238000013475 authorization Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Images
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
- G08B13/2428—Tag details
- G08B13/2431—Tag circuit details
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
- G08B13/1436—Mechanical actuation by lifting or attempted removal of hand-portable articles with motion detection
-
- 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
- G08B29/181—Prevention or correction of operating errors due to failing power supply
Definitions
- the present invention relates to a method and a device for detection, identification and protection property, in particular against theft.
- the detector could consist, for example, of a accelerometric sensor or inclinometer capable of detecting a displacement or a change in inclination of the object.
- Miniature beacons with the smallest footprint possible so that they can be fixed on objects of small dimensions, but having the largest autonomy possible.
- beacons are mainly due to the consumption of the radio transmitter contained in the tag. Given the fact that the transmitter must have a minimum range that it is not possible to reduce, to increase the autonomy of the beacon by limiting its energy consumption, it is necessary to ensure that the transmission time of the alarm signal is reduced to the absolute minimum.
- the use of a delay circuit limiting the issue period from the detection of the above parameter is not satisfactory. Indeed, when a device is authorized to change location at inside a room, but must not leave it (the exit door from the room being equipped with a receiver), the energy source of the beacon may be discharged as a result of a multiplicity of authorized trips without the receiver being used.
- the object of the invention is therefore more particularly to remove these drawbacks.
- the range of the receiver will be greater than that of the alarm signal transmitter, so as to be able to detect, over a wide area, the alarm signal emitted by beacons awakened by other means or tags responding directly to the detection of the parameter monitored and in a more narrow, for example a passage area, signals alarm emanating from beacons authorized to emit and which were awakened by the wake-up signal.
- the device for implementing the previously described process should involve, from a share, at least one local unit, possibly coupled to a central unit, and comprising a transmitter circuit suitable for transmitting a wake-up signal and a receiver circuit suitable for receiving an alarm signal from a tag and, on the other hand, at least one tag associated with an object to protect including a receiver circuit capable receive the wake-up signal from the local unit and to transmit an alarm signal as a result of this reception, a detector capable of carrying out the detection of a significant parameter of a prohibited use of the object and to issue an authorization signal following this detection, and a logic control circuit capable of trigger the alarm signal twice provided that the enabling signal has been issued and the beacon receiver has received the wake-up signal.
- the monitoring device involves, on the one hand, associated with each object to be protected, a beacon 1 comprising at least one high frequency emitter circuit 2 capable of generating, for example an electromagnetic wave having a frequency of 433.92 MHz, modulated in frequency modulation by a microcontroller and, on the other hand, distributed in the protected space, a plurality of local units R 1 , R 2 , R 3 , R 4 , provided with tuned receivers on the frequency of the transmitters of the beacons.
- a beacon 1 comprising at least one high frequency emitter circuit 2 capable of generating, for example an electromagnetic wave having a frequency of 433.92 MHz, modulated in frequency modulation by a microcontroller and, on the other hand, distributed in the protected space, a plurality of local units R 1 , R 2 , R 3 , R 4 , provided with tuned receivers on the frequency of the transmitters of the beacons.
- the different local units R 1 , R 2 , R 3 , R 4 are connected to a central unit UC comprising a processor associated with peripherals such as a keyboard / screen console CE, a printer I as well as possibly a remote transmission system Text-to-speech alarms.
- a central unit UC comprising a processor associated with peripherals such as a keyboard / screen console CE, a printer I as well as possibly a remote transmission system Text-to-speech alarms.
- the central processing unit UC can for example be designed from so as to manage eight independent zones, by through cards that manage a zone each.
- Each zone comprises up to one hundred and twenty seven local units R 1 , R 2 , R 3 , R 4 connected to each other and to the central unit UC via of an RS 422 type network, for example at 9600 baud in closed or open loop.
- the central unit UC ensures a permanent dialogue with the loops of local units according to a specific protocol.
- the beacons 1 fitted to the objects to be monitored can understand, as shown in Figure 2, a circuit high frequency transmitter 2, using FM synthesizer connected to a message editor 3.
- This transmitter circuit 2 just as the message editor 3, is supplied with from a power source 4 which can, by example, consisting of a battery, or an accumulator, for via a controllable switch 5 (represented here by a transistor) whose control is ensured by a logic circuit 6 (indicated by a door logic AND).
- One of the two inputs of this logic circuit 6 is connected to a validation circuit comprising a detector 7, such that for example an accelerometric type motion detector and a monostable rocker 8 which allows issue an authorization signal of predetermined duration (monostable period) following the detection of a acceleration exceeding a predetermined threshold.
- a validation circuit comprising a detector 7, such that for example an accelerometric type motion detector and a monostable rocker 8 which allows issue an authorization signal of predetermined duration (monostable period) following the detection of a acceleration exceeding a predetermined threshold.
- the second input of logic circuit 6 is connected to the wake-up circuit output including a receiver electromagnetic wave 9 for receiving a signal alarm from a transmitter 10 associated with the units local R ( Figure 3).
- the supply of the detector 7, the monostable 8, the logic circuit 6 and receiver 9 is permanently ensured by source 4.
- the supply of the sender 2 and the message editor 3 is done by via the controllable switch 5.
- detector 7 When detector 7 detects the monitored parameter, this detection causes the emission of a signal enabling by the monostable 8, when the receiver 9 receives a wake-up signal from the transmitter 10 of the local unit R on which it is located granted, logic circuit 6 causes the closure of switch 5. Circuits 2 and 3 are then fed so that editor 3 composes a message alarm which is transmitted to the local unit R by the transmitter 2.
- This second alternative relates for example to the case of 1 beacons fitted to objects which can be moved to inside a room but which should not exit: the transmitter 10 of the local unit R is then arranged so that its range includes the passage volume of the access door to the room.
- the tags 1 may furthermore include an energy level detection circuit batteries or batteries from the power source 4.
- This circuit can include, as shown, a detector 13 able to measure the voltage across the source power supply 4 and which delivers a digital signal representative of this voltage, to the message editor 3, via a controllable switch 14. This the latter is controlled by a decoder 15 placed at the output of the wake-up signal receiver 9.
- This level detection also requires a module transmitter / receiver M, which transmits, at the request of an operator, a coded signal for requesting information on the battery level, at destination of the receiver.
- this signal When received by the receiver 9, this signal is decoded by the decoder 15 which causes the closing of the switches 5 and 14.
- the detector 13 can then measure the voltage of the source and transmit corresponding digital information, to the message editor 3.
- the transmitter 2 then transmits this information to the receiver of the module M which can display it or indicate only that the level of the source is sufficient or not.
- the module M can also be designed so as to emit a coded signal to temporarily deactivate the beacon.
- the decoder 15 could be designed so as to force the input of logic circuit 6 for a preset duration, at following reception by the receiver 9 of the signal deactivation.
- the standalone beacons 1 could consist of detection clips such as those illustrated in the Figures 4 to 6 which are intended to be secured by pinching to the object you want to protect (for example a textile object) and which include a detection system designed to detect both an opening of the clamp and a tearing of the object which was secured to the clamp.
- the clamp 20 consists of two arms 21, 22 articulated to each other by one end by means of a disengageable freewheel device 23 opposing the opening of the clamp 20 in the engaged position, and of which the other two ends are provided with two respective jaws 24, 25, one, 24, of these jaws carrying a support piece 26 elastically deformable in engagement with a detector D (by example a microswitch) coupled to a TV surveillance, E powered by an energy source renewable S.
- a detector D by example a microswitch
- this monitoring device comprises a radio transmitter E of limited range controlled by the detector D, so as to be able to pass from a standby state to a triggered state in which the transmitter E is authorized to transmit intended for a receiver R n of a surveillance network, such as that represented in FIG. 1, an alarm signal containing an identification message.
- This transmission can be carried out either immediately after the change of state of the detector D, or after this change, following the reception by a TV receiver of a wake-up circuit associated with the clamp 20, of a signal of alarm clock sent by the transmitter device 10 associated with the receiver R n of the surveillance network.
- the TV monitoring device, E associated with the clamp 20 may include timing means allowing only authorize transmitter E to transmit the alarm signal for a limited time from the change of state of the detector D.
- the device according to the invention can also use as fixed beacons, for example communication devices. self-protected closure for protection against theft of objects contained in enclosures 32 closed by a sliding door 33.
- such a device comprises a latch 31 disposed inside the enclosure 32 and designed to provide self-locking in position closed from door 33 and to move to the unlocked position under the effect of a control signal.
- This lock 31 is ensured by means of a remote control device comprising a box of remote control 34 capable of transmitting an unlocking order coded and a receiver circuit 35, 36, 38 placed inside enclosure 32 and designed to receive the order from unlocking and decoding this order, so as to transmit at lock 31, after recognition of the code, a signal unlocking for a limited time.
- a remote control device comprising a box of remote control 34 capable of transmitting an unlocking order coded and a receiver circuit 35, 36, 38 placed inside enclosure 32 and designed to receive the order from unlocking and decoding this order, so as to transmit at lock 31, after recognition of the code, a signal unlocking for a limited time.
- the processing circuit here includes a first flip-flop monostable 38 triggered by the unlock signal and which maintains lock 31 in the unlocked state for a time sufficient to allow an operator to open door 33, and a second monostable flip-flop 49 triggered by the signal unlocking.
- the logic circuit 40 triggers the emission by a radio transmitter 41 of an alarm signal intended for a receiver R n of the surveillance network located within its range in the case where the signal transmitted by the first monostable flip-flop 18 is in state 0, while the signal delivered by detector 39 which is then in state 1 indicates the open position of door 33.
- the detector 39 can be connected to the monostable scale 49 reset input from so as to trigger an alarm during a reopening of door 33 during the metastable period of the flip-flop 49, triggered following a command from unlocking followed by first opening and then closing the door 33.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Signal Processing (AREA)
- Burglar Alarm Systems (AREA)
Abstract
Description
- soit des signaux d'alarme émanant de balises 1 situées dans une zone Z1 relativement importante et ne disposant pas de circuit de réveil ou dont le circuit de réveil a été intentionnellement forcé, ce qui est par exemple le cas d'objet devant rester à postes fixes et qui ne doivent donc pas subir des déplacements,
- soit des signaux d'alarme émanant de balises 1 équipées de circuits de réveil et qui se trouvent donc dans la zone Z2 de portée de l'émetteur de réveil 10 et dont le détecteur a déclenché l'émission d'un signal d'habilitation.
- un dispositif de détection 39, 39' délivrant un signal représentatif de la position ouverte ou fermée de la porte 33, et
- un circuit de traitement qui reçoit le signal de déverrouillage et le signal représentatif de la position de la porte 33, et qui émet un signal d'alarme dans le cas où la porte 33 est restée ouverte au-delà d'un laps de temps prédéterminé après l'émission du signal de déverrouillage.
Claims (13)
- Procédé pour la détection, l'identification et la protection d'objets contre le vol, procédé selon lequel on dote les objets d'une balise autonome (1) contenant une source d'alimentation en énergie électrique (4) et un émetteur (2) de portée limitée commandé par un dispositif de détection (7), de manière à pouvoir passer d'un état de veille à un état déclenché dans lequel l'émetteur (2) émet un signal d'alarme contenant un message d'identification, à la suite de la détection par ledit dispositif de détection (7) d'un paramètre significatif d'un usage prohibé de l'objet, et à placer dans des endroits appropriés de la zone surveillée, des unités locales (R) comprenant des récepteurs respectifs (11), aptes à recevoir les signaux d'alarme émis par les balises et à transmettre ce signal d'alarme à une unité centrale (U2),
caractérisé en ce que l'alimentation du circuit émetteur (2) à partir de la source (4) ne se produit qu'à la double condition que la balise ait été habilitée par suite de la détection du susdit paramètre et reçoive un signal de réveil émis, en continu par un dispositif émetteur (10) associé de préférence au circuit récepteur (R). - Procédé selon la revendication 1,
caractérisé en ce que la portée du récepteur (11) est plus importante que celle de l'émetteur du signal de réveil (10), de manière à pouvoir détecter, dans une large zone, le signal d'alarme émis par des balises réveillées par d'autres moyens ou des balises répondant directement à la détection du paramètre surveillé et dans une zone plus étroite, par exemple une zone de passage, les signaux d'alarme émanant de balises habilitées à émettre et qui ont été réveillées par le signal de réveil. - Procédé selon l'une des revendications précédentes,
caractérisé en ce qu'à la suite de la détection du susdit paramètre, la balise demeure habilitée pendant une durée limitée. - Procédé selon l'une des revendications précédentes,
caractérisé en ce que l'émetteur (2) de la balise est en outre utilisé pour transmettre des informations concernant l'état énergétique de la source. - Dispositif pour la mise en oeuvre du procédé selon l'une des revendications précédentes,
caractérisé en ce qu'il fait intervenir, d'une part, au moins une unité locale (R), éventuellement couplée à une unité centrale (UC), et comprenant un circuit émetteur (10) apte à émettre un signal de réveil et un circuit récepteur (11) apte à recevoir un signal d'alarme émis par une balise (1) et, d'autre part, au moins ladite balise 1 qui est associée à un objet à protéger et qui comprend un circuit récepteur (9), apte à recevoir le signal de réveil émis par l'unité locale (R) et à transmettre un signal d'alarme à la suite de cette réception, un détecteur (7) apte à effectuer la détection d'un paramètre significatif d'un usage prohibé de l'objet et à émettre un signal d'habilitation à la suite de cette détection, et un circuit logique de commande (6) apte à déclencher l'émission du signal d'alarme à la double condition que le signal d'habilitation ait été émis et que le récepteur (9) de la balise (1) ait reçu le signal de réveil. - Dispositif selon la revendication 5,
caractérisé en ce que l'alimentation du circuit émetteur de la balise est commandée par un interrupteur commandable (5) dont la commande est assurée par un circuit logique (6) dont une entrée est connectée à un circuit de validation comprenant un détecteur (7) et une bascule monostable (8) et une autre entrée est reliée à la sortie d'un circuit de réveil comprenant un récepteur (9) accordé sur l'émetteur (10) de l'unité locale (R). - Dispositif selon la revendication 6,
caractérisé en ce que l'alimentation du récepteur (9) de la balise (1) est contrôlée par un interrupteur commandable (12) commandé par la susdite bascule monostable (8). - Dispositif selon l'une des revendications 5 à 7,
caractérisé en ce que la susdite balise (1) comprend en outre un détecteur (13) apte à mesurer le niveau énergétique de la source (4), et dont la sortie est reliée à un éditeur de message (3) associé à l'émetteur (2), par l'intermédiaire d'un interrupteur commandable (14) commandé par un décodeur (15) placé en sortie du récepteur du signal de réveil (9), et en ce que le Dispositif fait en outre intervenir un module émetteur/récepteur (M), qui émet, à la demande d'un opérateur, un signal codé de demande d'informations du niveau énergétique de la source, à destination du récepteur (9) et qui reçoit en réponse un signal transmis par l'émetteur (2). - Dispositif selon l'une des revendications 5 à 8,
caractérisé en ce que la balise (1) comprend des moyens permettant de la désactiver temporairement à la suite de la réception d'un signal codé de désactivation. - Dispositif selon l'une des revendications 5 à 9,
caractérisé en ce que la susdite balise comprend une pince de détection (20) apte à se solidariser par pincement à un objet que l'on veut protéger, un détecteur (D) conçu de manière à détecter une ouverture de la pince (20) ainsi qu'un arrachement de l'objet qui se trouvait pincé, et des moyens de transmission du signal d'alarme, commandés par le susdit détecteur (D) et par le susdit signal de réveil. - Dispositif selon la revendication 10,
caractérisé en ce que la susdite pince (20) se compose de deux bras (21, 22) articulés l'un à l'autre, par une extrémité, au moyen d'un dispositif de roue libre débrayable (23) qui s'oppose à l'ouverture de la pince (20) en position embrayée. - Dispositif selon la revendication 5,
caractérisé en ce qu'il fait en outre intervenir un verrou (31) placé à l'intérieur d'une enceinte (32) et conçu de manière à assurer un auto-verrouillage, en position fermée d'une porte (33) de l'enceinte (32) et à passer en position déverrouillée sous l'effet d'un signal de déverrouillage engendré par une télécommande (34), ce verrou (31) étant associé à un dispositif de détection (39, 39') délivrant un signal représentatif de la position ouverte ou fermée de la porte (33), un circuit de traitement qui reçoit le signal de déverrouillage et le signal représentatif de la position de la porte (33) et qui émet un signal d'alarme à destination d'une unité locale (R) dans le cas où la porte (33) est restée ouverte au-delà d'un laps de temps prédéterminé après l'émission du signal de déverrouillage. - Dispositif selon la revendication 12,
caractérisé en ce que le susdit circuit de traitement comprend des moyens permettant de provoquer le déclenchement d'une alarme lors d'une réouverture de la porte (33) se produisant pendant une période métastable déclenchée à la suite d'une commande de deverrouillage suivie d'une première ouverture puis d'une fermeture de la porte (33).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9415765A FR2728991A1 (fr) | 1994-12-28 | 1994-12-28 | Procede et dispositif pour la detection, l'identification et la protection de biens notamment contre le vol |
FR9415765 | 1994-12-28 | ||
PCT/FR1995/001713 WO1996020463A1 (fr) | 1994-12-28 | 1995-12-21 | Procede et dispositif pour la detection, l'identification et la protection de biens notamment contre le vol |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0748492A1 EP0748492A1 (fr) | 1996-12-18 |
EP0748492B1 true EP0748492B1 (fr) | 2000-11-29 |
Family
ID=9470328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95943258A Expired - Lifetime EP0748492B1 (fr) | 1994-12-28 | 1995-12-21 | Procede et dispositif pour la detection, l'identification et la protection de biens notamment contre le vol |
Country Status (5)
Country | Link |
---|---|
US (1) | US5838234A (fr) |
EP (1) | EP0748492B1 (fr) |
DE (1) | DE69519512D1 (fr) |
FR (1) | FR2728991A1 (fr) |
WO (1) | WO1996020463A1 (fr) |
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IL119509A (en) * | 1996-10-28 | 2000-02-17 | Hi G Tek Ltd | Electronic tag |
EP1058918B1 (fr) * | 1998-03-05 | 2002-06-26 | Infineon Technologies AG | Procede permettant de proteger l'identite d'objets et dispositif permettant de mettre en oeuvre ce procede |
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EP0955616A1 (fr) * | 1998-05-07 | 1999-11-10 | Hi-G-Tek Ltd | Etiquette électronique |
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---|---|---|---|---|
US3668675A (en) * | 1970-04-03 | 1972-06-06 | Allan D Joens | Remote alarm system |
US3665448A (en) * | 1970-08-03 | 1972-05-23 | Hugh A Mcglinchey | Electronic shoplifting prevention system |
US4827395A (en) * | 1983-04-21 | 1989-05-02 | Intelli-Tech Corporation | Manufacturing monitoring and control systems |
US4686513A (en) * | 1985-09-30 | 1987-08-11 | Sensormatic Electronics Corporation | Electronic surveillance using self-powered article attached tags |
DE3733808A1 (de) * | 1987-10-07 | 1989-05-11 | T E C Computer Gmbh | Vorrichtung zur ueberwachung von sachen und/oder personen |
US4962369A (en) * | 1989-02-09 | 1990-10-09 | Marcia Israel | Merchandise security system utilizing RF transmitter |
US4980671A (en) * | 1989-04-26 | 1990-12-25 | Guardian Technologies, Inc. | Remote confinement system with timed tamper signal reset |
US5154504A (en) * | 1989-08-31 | 1992-10-13 | Minitronics Pty Limited | Communications and testing for emergency systems |
IT1249797B (it) * | 1989-11-21 | 1995-03-20 | Simepro Srl | Dispositivo per controllare il movimento di un oggetto custodito. |
US5025246A (en) * | 1990-04-10 | 1991-06-18 | Sensormatic Electronics Corporation | EAS tag with motion detection facility |
US5168263A (en) * | 1990-10-03 | 1992-12-01 | Sensormatic Electronics Corporation | EAS tag with piezoelectric facility for motion detection |
DE4034104A1 (de) * | 1990-10-26 | 1992-04-30 | Klein Schanzlin & Becker Ag | Gleitringdichtung |
US5083111A (en) * | 1990-11-26 | 1992-01-21 | Sensormatic Electronics Corporation | Jamming apparatus for electronic article surveillance systems |
US5151684A (en) * | 1991-04-12 | 1992-09-29 | Johnsen Edward L | Electronic inventory label and security apparatus |
FR2700872B1 (fr) * | 1993-01-27 | 1995-04-07 | Robin Veronique | Procédé et dispositif pour la protection d'objets contre le vol. |
US5610587A (en) * | 1993-08-31 | 1997-03-11 | Kubota Corporation | Theft preventive apparatus having an alarm output device |
-
1994
- 1994-12-28 FR FR9415765A patent/FR2728991A1/fr active Granted
-
1995
- 1995-12-21 US US08/702,604 patent/US5838234A/en not_active Expired - Fee Related
- 1995-12-21 EP EP95943258A patent/EP0748492B1/fr not_active Expired - Lifetime
- 1995-12-21 WO PCT/FR1995/001713 patent/WO1996020463A1/fr active IP Right Grant
- 1995-12-21 DE DE69519512T patent/DE69519512D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69519512D1 (de) | 2001-01-04 |
WO1996020463A1 (fr) | 1996-07-04 |
FR2728991B1 (fr) | 1997-02-28 |
FR2728991A1 (fr) | 1996-07-05 |
EP0748492A1 (fr) | 1996-12-18 |
US5838234A (en) | 1998-11-17 |
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