WO2012059678A2 - Antitheft protection system for self-service item on sale - Google Patents

Antitheft protection system for self-service item on sale Download PDF

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Publication number
WO2012059678A2
WO2012059678A2 PCT/FR2011/052546 FR2011052546W WO2012059678A2 WO 2012059678 A2 WO2012059678 A2 WO 2012059678A2 FR 2011052546 W FR2011052546 W FR 2011052546W WO 2012059678 A2 WO2012059678 A2 WO 2012059678A2
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WO
WIPO (PCT)
Prior art keywords
alarm
protection system
transmitter
housing
frequency
Prior art date
Application number
PCT/FR2011/052546
Other languages
French (fr)
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WO2012059678A3 (en
Inventor
Bruno Bouan
Original Assignee
Fors France
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Publication of WO2012059678A2 publication Critical patent/WO2012059678A2/en
Publication of WO2012059678A3 publication Critical patent/WO2012059678A3/en

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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
    • G08B13/2414—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 inductive tags
    • G08B13/2417—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 inductive tags having a radio frequency identification chip
    • 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
    • G08B13/2448—Tag with at least dual detection means, e.g. combined inductive and ferromagnetic tags, dual frequencies within a single technology, tampering detection or signalling means on the tag

Definitions

  • the present invention relates to the field of electronic protection of articles sold in self-service stores.
  • the electronic protection is generally carried out by gantries located at the entrances and exits of small and large stores, exit without purchase and staff exit, and which trigger a sound and light signal when an article still labeled crosses their field.
  • the articles are equipped with anti-theft devices interacting with the frame by radio-frequency or magnetic means. Composed of a marker, these locks are inserted into an overwrap box, or hooked by means of a needle locked on a textile article, or fixed on the packaging of an article by a "octopus” wired or stuck on the article to protected.
  • Each gantry antenna pair transmits a wave in frequencies ranging from 1.75 to 10 MHz.
  • the most common frequency is 8.2 MHz.
  • the frequencies of 3.25 MHz, 5.5 MHz, 8.2 MHz and 10.7 MHz are also used.
  • the advantage of the low frequencies like 1.55 or 1.81 MHz is to be little used therefore little disturbed by the surrounding systems.
  • the advantage of 8.2 MHz is to be the most prevalent frequency in the world so to be available on a large number of support.
  • the label consists of a winding (case of hard tags) or a printed circuit (case of Sticky notes).
  • One of the gantries emits a very weak signal, insufficient to be detected by the other. When the lock passes between the two, it amplifies the signal which can then be picked up by the other gantry.
  • the deactivation of radio frequency tags can be carried out remotely, by the application of an intense magnetic field, without contact between the tag and the deactivator.
  • the label consists of a spirally wound copper wire representing the winding and a printed circuit board.
  • a radio-frequency tag 5 cm long can be detected by an antenna located 2 meters away.
  • Electromagnetic technology is also known, where the antennas comprise an emitter which creates a low or high frequency magnetic field.
  • the labels incorporate a metal strip made from a metal alloy that saturates easily at a very low magnetic intensity.
  • the two antennas are composed of two windings of wires placed parallel to each other, so that the magnetic axis of the windings are identical. An alternating current is applied in one of the antennas which induces a voltage in the other. The passage of a label in this field will produce a disturbance in its form.
  • the antennas controlled by microprocessors in order to take into account the external environment, are only triggered when the tag is passed.
  • This technique affects magnetic media such as audio cassettes, video, floppy disks or credit cards, and does not work on metal items.
  • the range of the antennas is at most only 90 cm. Moving an object over this distance will not trigger the alarm.
  • Magneto-acoustic technology using antennas creating a magnetic field is also known.
  • the labels associated with this technology are composed of two ferromagnetic lamellae which then begin to vibrate as they pass through the magnetic field.
  • Transmitter tags with very low frequency are also known. These are labels containing a battery operated transceiver. Store access must be protected by a "total screen”. This is still a little used system because the labels are expensive, are heavy and have a life limited to that of battery operation.
  • the object of the present invention is to remedy these drawbacks by proposing a mode of interaction between the monitoring terminal and the antitheft device, reducing the effectiveness of the countermeasures used to inhibit the antitheft devices of the art. prior.
  • the invention relates, in its most general sense, to an anti-theft protection system of a self-service zone, comprising at least one transmitter equipment implanted at the limit of the self-service area and at least one control unit. protection adapted to be associated in a locked manner with the article to be protected, said housing comprising means of interaction with the sending equipment and alarm means triggered by the penetration of the housing into the emission volume of said equipment, characterized in that the interaction means act in the frequency band below 30 Khz in an encoded mode.
  • the transmission frequency of the transmitter is included in the very low frequency band (VLF-very low frequency according to the international designation) corresponding to the frequency band between 3 Khz and 30 Khz.
  • the transmission frequency of the transmitter is included in the ultrafast frequency band (ULF-Ultra low frequency according to the international designation) corresponding to the frequency band between 300 Hz and 3 Khz.
  • the transmitter transmits a frame with a carrier whose frequency is between 1 and 3 Khz.
  • the transmitter further comprises an audio modulation circuit for the transmission of sound information.
  • This variant makes it possible to transmit, via the same equipment, voice information destined for sonotones equipped with a very low frequency loop. This information is for example the amplified way of the cashier.
  • the invention also relates to a transmitter equipment for a protection system comprising a low-frequency amplifier supplying at least one transmission loop configured to generate an activation volume of said boxes.
  • the invention also relates to an antitheft housing for a protection system comprising a connection means with an article to be protected as well as an electronic circuit comprising a power supply means, a coil whose output is connected to an operational amplifier carrying out the demodulation of the received signal, as well as a microcontroller triggering an alarm in the event of detection of the coded signal.
  • the alarm means is an audible alarm.
  • the alarm means is an electromagnetic alarm interacting with fixed equipment.
  • the invention also relates to a housing whose means of connection with an article to be protected is of the macaroon alarm type, octopus, macaroon with alarm strap, bottle necklace with alarm, self adhesive label or insertable with alarm.
  • the antitheft box according to the invention is able to receive several codes by the transmitting antenna: namely: triggering the alarm, battery test, activation of the alarm and inhibition of it on a voluntary basis ( by means of a specific antenna placed in the hands of the safety manager)
  • FIG. 1 represents the schematic diagram of the transmitter
  • Figure 2 shows the block diagram of the antitheft housing.
  • Figure 1 shows the block diagram of a transmitter according to the invention. It comprises an electronic amplifier (1) emitting a carrier of 1 kHz with a power of 40 Watt.
  • a power supply (2) delivering a voltage of 12 volts with an intensity of 4 amperes.
  • the carrier is modulated by a frame generator (3) delivering a coded signal in a predefined sequence for discriminating the noise protection signal.
  • the carrier may optionally receive a second modulation from an audio amplifier (10) transmitting the cashier's amplified channel or any other audio information.
  • This variant makes it possible to provide a signal intended for the soundproofing devices of hearing-impaired clients.
  • the signal delivered by the amplifier (1) feeds a loop (4) disposed on the ground, on the ceiling or on the sides of a passage, in order to form a controlled emission space.
  • the configuration of the loop can be determined by a simulation calculation or empirically, by successive adjustment of the shapes and dimensions of the loop.
  • the loop consists of a hundred turns of wire of a diameter of 0.5 mm, positioned on a support of 8 cm by 30 cm, or more if necessary to protect a warehouse exit area.
  • FIG. 2 represents the block diagram of a receiver circuit according to the invention. It comprises a detection circuit (5) connected to a coil (8). The detected signal is transmitted to a microcontroller (6) performing peak detection and demodulation to trigger the activation of a sound transmitter (7) when a signal conforming to the encoded signal is detected.
  • the coil is, for example, a T-coil coil type of about 200 mH.
  • Receiver circuits are powered by an electric battery or a rechargeable battery.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The present invention relates to an antitheft protection system for a self-service area. Said system includes at least one transmitting apparatus, set up at the boundary of the self-service area, and at least one protective housing that is capable of being connected in a locked manner with the item to be protected. Said housing comprises a means for interacting with the transmitting apparatus and an alarm means triggered by penetrating the housing within the transmission space of said apparatus. Said system is characterized in that the interaction means operates within the frequency band of less than 30 KHz in an encoded mode.

Description

SYSTEME DE PROTECTION ANTIVOL POUR ARTICLE EXPOSE A LA ANTI-THEFT PROTECTION SYSTEM FOR AN ARTICLE EXPOSED TO THE
VENTE EN LIBRE SERVICE SALE IN FREE SERVICE
Domaine de l' invention Field of the invention
La présente invention concerne le domaine de la protection électronique d'articles vendus dans des magasins libre service. The present invention relates to the field of electronic protection of articles sold in self-service stores.
Etat de la technique La protection électronique est généralement réalisée par des portiques implantés aux entrées et sorties des petits et grands magasins, sortie sans achat et sortie du personnel, et qui déclenchent un signal sonore et lumineux lorsqu'un article encore étiqueté traverse leur champ. State of the art The electronic protection is generally carried out by gantries located at the entrances and exits of small and large stores, exit without purchase and staff exit, and which trigger a sound and light signal when an article still labeled crosses their field.
Les articles sont équipés d'antivol interagissant avec le portique par des moyens radio- fréquence ou magnétique. Composé d'une marqueur, ces antivols sont insérés dans un boîtier de suremballage, ou accrochés par l'intermédiaire d'une aiguille verrouillée sur un article textile, ou encore fixés sur l'emballage d'un article par une « pieuvre » filaire ou collé sur l'article à protégé.  The articles are equipped with anti-theft devices interacting with the frame by radio-frequency or magnetic means. Composed of a marker, these locks are inserted into an overwrap box, or hooked by means of a needle locked on a textile article, or fixed on the packaging of an article by a "octopus" wired or stuck on the article to protected.
Chaque couple d'antenne du portique émet une onde dans des fréquences allant de 1,75 à 10 MHz. La fréquence la plus répandue est celle de 8,2 MHz. On utilise aussi les fréquences de 3,25 MHz, 5,5 MHz, 8,2 MHz et 10,7 MHz. L'avantage des basses fréquences comme 1,55 ou 1,81 MHz est d'être peu utilisées donc peu perturbées par les systèmes environnants. L'avantage du 8,2 MHz est d'être la fréquence la plus répandue dans le monde donc d'être disponible sur un grand nombre de support .  Each gantry antenna pair transmits a wave in frequencies ranging from 1.75 to 10 MHz. The most common frequency is 8.2 MHz. The frequencies of 3.25 MHz, 5.5 MHz, 8.2 MHz and 10.7 MHz are also used. The advantage of the low frequencies like 1.55 or 1.81 MHz is to be little used therefore little disturbed by the surrounding systems. The advantage of 8.2 MHz is to be the most prevalent frequency in the world so to be available on a large number of support.
L'étiquette est constituée d'un bobinage (cas des étiquettes dures) ou d'un circuit imprimé (cas des étiquettes autocollantes). L'un des portiques émet un signal très faible, insuffisant pour être détecté par l'autre. Lorsque l'antivol passe entre les deux, il amplifie le signal qui peut alors être capté par l'autre portique. The label consists of a winding (case of hard tags) or a printed circuit (case of Sticky notes). One of the gantries emits a very weak signal, insufficient to be detected by the other. When the lock passes between the two, it amplifies the signal which can then be picked up by the other gantry.
Cette solution permet d'assurer la protection des objets métalliques si l'étiquette n'est pas directement collée sur l'objet métallique et n'interfère pas avec les appareils électroniques. This solution ensures the protection of metal objects if the label is not directly glued to the metal object and does not interfere with electronic devices.
La désactivâtion des étiquettes radio- fréquence peut s'effectuer à distance, par l'application d'un intense champ magnétique, sans qu'il y ait contact entre l'étiquette et le désactivateur .  The deactivation of radio frequency tags can be carried out remotely, by the application of an intense magnetic field, without contact between the tag and the deactivator.
Lorsqu'une désactivation systématique est installée, elle peut être intégrée dans le scanner dont se sert la caissière pour lire les codes à barres. Ceci offre, dans le cas des étiquettes intégrées au support, la possibilité pour la caissière de passer directement l'objet dans le champ du désactivateur (jusqu'à une distance de 30 cm) sans connaître la localisation exacte de l'étiquette antivol sur ou dans le produit. Ce système présente pour le magasin le double avantage de ne pas affecter la productivité.  When a systematic deactivation is installed, it can be integrated into the scanner used by the cashier to read the bar codes. This offers, in the case of labels integrated in the support, the possibility for the cashier to pass directly the object in the field of the deactivator (up to a distance of 30 cm) without knowing the exact location of the antitheft label on or in the product. This system presents the store with the double advantage of not affecting productivity.
L'étiquette est composée d'un fil de cuivre enroulé en spirale représentant le bobinage et d'un circuit imprimé. Plus leur dimension est importante, meilleure est leur détection. Une étiquette radio- fréquence de 5 cm de côtés peut être détectée par une antenne située à 2 mètres.  The label consists of a spirally wound copper wire representing the winding and a printed circuit board. The larger their dimension, the better their detection. A radio-frequency tag 5 cm long can be detected by an antenna located 2 meters away.
On connaît également la technologie électromagnétique, où les antennes comportent un émetteur qui crée un champ magnétique basse ou haute fréquence. Les étiquettes intègrent une bande métallique faite à partir d'un alliage de métaux qui sature facilement à une intensité magnétique très basse.  Electromagnetic technology is also known, where the antennas comprise an emitter which creates a low or high frequency magnetic field. The labels incorporate a metal strip made from a metal alloy that saturates easily at a very low magnetic intensity.
Les deux antennes sont composées de deux enroulements de fils placés parallèlement l'un à l'autre, de sorte que l'axe magnétique des enroulements soient identiques. Un courant alternatif est appliqué dans l'une des antennes ce qui induit une tension dans l'autre. Le passage d'une étiquette dans ce champ produira une perturbation dans sa forme. Les antennes, pilotées par microprocesseurs afin de prendre en compte l'environnement extérieur, ne se déclenchent en alerte qu'au passage de l'étiquette.The two antennas are composed of two windings of wires placed parallel to each other, so that the magnetic axis of the windings are identical. An alternating current is applied in one of the antennas which induces a voltage in the other. The passage of a label in this field will produce a disturbance in its form. The antennas, controlled by microprocessors in order to take into account the external environment, are only triggered when the tag is passed.
Cette technique affecte les supports magnétiques comme les cassettes audio, vidéo, disquettes ou les cartes de crédits, et ne fonctionne pas sur les articles métalliques. De plus, la portée des antennes n'est au maximum que de 90 cm. Le passage d'un objet à plus de cette distance ne déclenchera donc pas l'alarme. This technique affects magnetic media such as audio cassettes, video, floppy disks or credit cards, and does not work on metal items. In addition, the range of the antennas is at most only 90 cm. Moving an object over this distance will not trigger the alarm.
On connaît aussi la technologie magnéto- acoustique mettant en œuvre des antennes créant un champ magnétique. Les étiquettes associées à cette technologie sont composées de deux lamelles ferromagnétiques qui se mettent alors à vibrer lors de leur passage dans le champ magnétique . Magneto-acoustic technology using antennas creating a magnetic field is also known. The labels associated with this technology are composed of two ferromagnetic lamellae which then begin to vibrate as they pass through the magnetic field.
On connaît également les étiquettes émettrices à très basse fréquence. Il s'agit d'étiquettes contenant un émetteur/récepteur fonctionnant à piles. L'accès du magasin doit alors être protégé par un « écran total ». Il s'agit là encore d'un système peu usité car les étiquettes coûtent chères, sont lourdes et ont une durée de vie limitée à celle de fonctionnement de la pile. Transmitter tags with very low frequency are also known. These are labels containing a battery operated transceiver. Store access must be protected by a "total screen". This is still a little used system because the labels are expensive, are heavy and have a life limited to that of battery operation.
Ces modes de détection peuvent être mis en œuvre sous forme d'étiquettes sonores équipées de sonnettes internes qui se déclenchent au passage des portes ou à chaque tentative de neutralisation. Ce système est lui aussi peu répandu à cause des mêmes inconvénients que le précédent. Inconvénient de l'état de la technique These detection modes can be implemented in the form of sound tags equipped with internal bells which are triggered when the doors pass or at each attempt to neutralize. This system is also not widespread because of the same disadvantages as the previous. Disadvantage of the state of the art
Les solutions de l'art antérieur présentent plusieurs inconvénients. En particulier, ils sont vulnérables par rapport à des contre-mesures consistant à entourer l'article protégé par une feuille métallique. Il suffit de loger l'article dans un sac métallique ou un autre article métallique (par exemple une boîte à biscuits ou à outils, ou barbecue ...) pour inhiber la capacité à détecter l'antivol lors du passage dans le portique par la neutralisation de la détection par phénomène de cage de Faraday obtenu soit au moyen d'une masse métallique ou par le corps humain. The solutions of the prior art have several disadvantages. In particular, they are vulnerable to countermeasures of surrounding the article protected by a metal foil. Simply place the item in a metal bag or other metal item (for example a cookie or tool box, or barbecue ...) to inhibit the ability to detect the lock when passing through the gantry by the neutralization of detection by Faraday cage phenomenon obtained either by means of a metal mass or by the human body.
Solution apportée par l'invention La présente invention a pour but de remédier à ces inconvénients en proposant un mode d'interaction entre la borne de surveillance et l'antivol réduisant l'efficacité des contre-mesures utilisés pour inhiber les antivols de l'art antérieur. Solution Provided by the Invention The object of the present invention is to remedy these drawbacks by proposing a mode of interaction between the monitoring terminal and the antitheft device, reducing the effectiveness of the countermeasures used to inhibit the antitheft devices of the art. prior.
A cet effet, l'invention concerne selon son acception la plus générale un système de protection antivol d'une zone en libre service, comprenant au moins un équipement émetteur implanté à la limite de la zone de libre-service et au moins un boîtier de protection apte à être associé de manière verrouillée avec l'article à protéger, ledit boîtier comportant des moyens d'interaction avec l'équipement émetteur et des moyens d'alarme déclenchés par la pénétration du boîtier dans le volume d'émission dudit équipement, caractérisé en ce que les moyens d'interaction agissent dans la bande de fréquences inférieures à 30 Khz selon un mode codé.  To this end, the invention relates, in its most general sense, to an anti-theft protection system of a self-service zone, comprising at least one transmitter equipment implanted at the limit of the self-service area and at least one control unit. protection adapted to be associated in a locked manner with the article to be protected, said housing comprising means of interaction with the sending equipment and alarm means triggered by the penetration of the housing into the emission volume of said equipment, characterized in that the interaction means act in the frequency band below 30 Khz in an encoded mode.
Selon un premier mode de réalisation, la fréquence d'émission de l'émetteur est compris dans la bande de fréquences myriamétriques (VLF-very low frequency selon la désignation internationale) correspondant à la bande de fréquences comprises entre 3 Khz et 30 Khz. Selon un mode de réalisation préféré, la fréquence d'émission de l'émetteur est compris dans la bande de fréquences ultrabasses (ULF-Ultra low frequency selon la désignation internationale) correspondant à la bande de fréquences comprises entre 300 Hz et 3 Khz. De préférence l'émetteur émet une trame avec une porteuse dont la fréquence est comprise entre 1 et 3 Khz . According to a first embodiment, the transmission frequency of the transmitter is included in the very low frequency band (VLF-very low frequency according to the international designation) corresponding to the frequency band between 3 Khz and 30 Khz. According to a preferred embodiment, the transmission frequency of the transmitter is included in the ultrafast frequency band (ULF-Ultra low frequency according to the international designation) corresponding to the frequency band between 300 Hz and 3 Khz. Preferably the transmitter transmits a frame with a carrier whose frequency is between 1 and 3 Khz.
Selon un mode de mise en œuvre particulier, l'émetteur comprend en outre un circuit de modulation audio pour la transmission d'une information sonore. Cette variante permet de transmettre par le même équipement des informations vocales à destination de sonotones équipés d'une boucle très basse fréquence. Ces informations sont par exemple la voie amplifiée de la caissière. According to a particular mode of implementation, the transmitter further comprises an audio modulation circuit for the transmission of sound information. This variant makes it possible to transmit, via the same equipment, voice information destined for sonotones equipped with a very low frequency loop. This information is for example the amplified way of the cashier.
L'invention concerne également un équipement émetteur pour un système de protection comprenant un amplificateur basse-fréquence alimentant au moins une boucle d'émission configurée pour générer un volume de d'activation desdits boîtiers. The invention also relates to a transmitter equipment for a protection system comprising a low-frequency amplifier supplying at least one transmission loop configured to generate an activation volume of said boxes.
L'invention concerne encore un boîtier antivol pour un système de protection comprenant un moyen de liaison avec un article à protéger ainsi qu'un circuit électronique comprenant un moyen d'alimentation électrique, une bobine dont la sortie est reliée à un amplificateur opérationnel réalisant la démodulation du signal reçu, ainsi qu'un micro contrôleur déclenchant une alarme en cas de détection du signal codé. The invention also relates to an antitheft housing for a protection system comprising a connection means with an article to be protected as well as an electronic circuit comprising a power supply means, a coil whose output is connected to an operational amplifier carrying out the demodulation of the received signal, as well as a microcontroller triggering an alarm in the event of detection of the coded signal.
Selon une première variante, le moyen d'alarme est une alarme sonore. Selon une deuxième variante, le moyen d'alarme est une alarme électromagnétique interagissant avec un équipement fixe. According to a first variant, the alarm means is an audible alarm. According to a second variant, the alarm means is an electromagnetic alarm interacting with fixed equipment.
L'invention porte également sur un boîtier dont le moyen de liaison avec un article à protéger est du type macaron alarme, pieuvre, macaron avec lanière alarme, serre col bouteille avec alarme, étiquette auto collante ou insérable avec alarme.  The invention also relates to a housing whose means of connection with an article to be protected is of the macaroon alarm type, octopus, macaroon with alarm strap, bottle necklace with alarm, self adhesive label or insertable with alarm.
Le boîtier antivol selon l'invention est à même de pouvoir recevoir plusieurs codes par l'antenne d'émission : à savoir : déclenchement de l'alarme, Test batterie, activation de l'alarme et inhibition de celle- ci de manière volontaire (au moyen d'une antenne spécifique mise entre les mains du responsable de sécurité )  The antitheft box according to the invention is able to receive several codes by the transmitting antenna: namely: triggering the alarm, battery test, activation of the alarm and inhibition of it on a voluntary basis ( by means of a specific antenna placed in the hands of the safety manager)
Description détaillée de l'invention  Detailed description of the invention
L'invention sera mieux comprise à la lecture de la description qui suit, concernant un exemple non limitatif de réalisation où :  The invention will be better understood on reading the description which follows, relating to a nonlimiting example of embodiment where:
la figure 1 représente le schéma de principe de 1 ' émetteur  FIG. 1 represents the schematic diagram of the transmitter
la figure 2 représente le schéma de principe du boîtier antivol.  Figure 2 shows the block diagram of the antitheft housing.
La figure 1 représente le schéma de principe d'un émetteur conforme à l'invention. Il comprend un amplificateur électronique (1) émettant une porteuse de 1 kHz avec une puissance de 40 Watt.  Figure 1 shows the block diagram of a transmitter according to the invention. It comprises an electronic amplifier (1) emitting a carrier of 1 kHz with a power of 40 Watt.
Il est alimenté par un bloc d'alimentation (2) délivrant une tension de 12 volts avec une intensité de 4 ampères.  It is powered by a power supply (2) delivering a voltage of 12 volts with an intensity of 4 amperes.
La porteuse est modulée par un générateur de trame (3) délivrant un signal codé selon une séquence prédéfinie permettant de discriminer le signal de protection du bruit de fond.  The carrier is modulated by a frame generator (3) delivering a coded signal in a predefined sequence for discriminating the noise protection signal.
La porteuse peut optionnellement recevoir une deuxième modulation provenant d'un amplificateur audio (10) transmettant la voie amplifiée de la caissière ou toute autre information audio. Cette variante permet de fournir un signal à destination des sonotones équipant des clients malentendants.  The carrier may optionally receive a second modulation from an audio amplifier (10) transmitting the cashier's amplified channel or any other audio information. This variant makes it possible to provide a signal intended for the soundproofing devices of hearing-impaired clients.
Le signal délivré par l'amplificateur (1) alimente une boucle (4) disposé au sol, au plafond ou sur les cotés d'un passage, afin de former un espace d'émission maîtrisé. La configuration de la boucle peut être déterminée par un calcul de simulation ou de manière empirique, par ajustement successif des formes et dimensions de la boucle. A titre d'exemple, la boucle est constituée d'une centaine de spires de fil d'un diamètre de 0,5 mm, positionnée sur un support d'une taille de 8 cm par 30 cm, voire plus si nécessaire en vue de protéger un espace de sortie de magasin. The signal delivered by the amplifier (1) feeds a loop (4) disposed on the ground, on the ceiling or on the sides of a passage, in order to form a controlled emission space. The configuration of the loop can be determined by a simulation calculation or empirically, by successive adjustment of the shapes and dimensions of the loop. For example, the loop consists of a hundred turns of wire of a diameter of 0.5 mm, positioned on a support of 8 cm by 30 cm, or more if necessary to protect a warehouse exit area.
La figure 2 représente le schéma de principe d'un circuit récepteur conforme à l'invention. Il comprend un circuit de détection (5) relié à une bobine (8) . Le signal détecté est transmis à un microcontrôleur (6) réalisant une détection de crête et une démodulation pour déclencher l'activation d'un émetteur sonore (7) lorsqu'un signal conforme au signal codé est détecté. La bobine est par exemple une self de type bobine type T- coil d'environ 200 mH .  FIG. 2 represents the block diagram of a receiver circuit according to the invention. It comprises a detection circuit (5) connected to a coil (8). The detected signal is transmitted to a microcontroller (6) performing peak detection and demodulation to trigger the activation of a sound transmitter (7) when a signal conforming to the encoded signal is detected. The coil is, for example, a T-coil coil type of about 200 mH.
Les circuits du récepteur sont alimentés par une pile électrique ou un accumulateur rechargeable. Receiver circuits are powered by an electric battery or a rechargeable battery.

Claims

Revendications claims
1 - Système de protection antivol d'une zone en libre service, comprenant au moins un équipement émetteur implanté à la limite de la zone de libre-service et au moins un boîtier de protection apte à être associé de manière verrouillée avec l'article à protéger, ledit boîtier comportant des moyens d'interaction avec l'équipement émetteur et des moyens d'alarme déclenchés par la pénétration du boîtier dans le volume d'émission dudit équipement, caractérisé en ce que les moyens d'interaction agissent dans la bande de fréquences inférieures à 30 Khz selon un mode codé. 1 - Anti-theft protection system of a self-service zone, comprising at least one transmitter equipment implanted at the limit of the self-service zone and at least one protective casing able to be associated in a locked manner with the article to be protect, said housing comprising means of interaction with the transmitter equipment and alarm means triggered by the penetration of the housing into the emission volume of said equipment, characterized in that the interaction means act in the transmission band; frequencies below 30 Khz in a coded mode.
2 - Système de protection selon la revendication 1 caractérisé en ce que la fréquence d'émission de l'émetteur est comprise dans la bande de fréquences myriamétriques (VLF) . 2 - protection system according to claim 1 characterized in that the transmission frequency of the transmitter is in the VLF frequency band.
3 - Système de protection selon la revendication 1 caractérisé en ce que la fréquence d'émission de l'émetteur est compris dans la bande de fréquences ultrabasses (ULF) . 3 - protection system according to claim 1 characterized in that the emitter frequency of the transmitter is in the ultrafast frequency band (ULF).
4 - Système de protection selon la revendication 1 caractérisé en ce que l'émetteur émet une trame avec une porteuse dont la fréquence est comprise entre 1 et 4 Khz . 5 - Equipement émetteur pour un système de protection conforme à la revendication principale, caractérisé en ce qu'il comprend un amplificateur basse- fréquence (1) alimentant au moins une boucle d'émission (4) configurée pour générer un volume d'activation desdits boîtiers. 4 - Protection system according to claim 1 characterized in that the transmitter transmits a frame with a carrier whose frequency is between 1 and 4 Khz. 5 - transmitter equipment for a protection system according to the main claim, characterized in that it comprises a low-frequency amplifier (1) supplying at least one transmission loop (4) configured to generate an activation volume of said housings.
6 - Boîtier antivol pour un système de protection conforme à la revendication principale, caractérisé en ce qu'il comprend un moyen de liaison avec un article à protéger ainsi qu'un circuit électronique comprenant un moyen d'alimentation électrique, une bobine (8) dont la sortie est reliée à un amplificateur opérationnel (5) réalisant la démodulation du signal reçu, ainsi qu'un micro contrôleur (6) déclenchant une alarme en cas de détection du signal codé. 7 - Boîtier antivol pour un système de protection conforme à la revendication 6, caractérisé en ce que le moyen d'alarme est une alarme sonore (7) . 6 - Anti-theft housing for a protection system according to the main claim, characterized in that it comprises a connection means with an article to protect and an electronic circuit comprising a power supply means, a coil (8) whose output is connected to an operational amplifier (5) demodulating the received signal, and a microcontroller (6) triggering an alarm in case of detection of the coded signal. 7 - Anti-theft housing for a protection system according to claim 6, characterized in that the alarm means is an audible alarm (7).
8 - Boîtier antivol pour un système de protection conforme à la revendication 6, caractérisé en ce que le moyen d'alarme est une alarme électromagnétique interagissant avec un équipement fixe. 8 - Anti-theft housing for a protection system according to claim 6, characterized in that the alarm means is an electromagnetic alarm interacting with a fixed equipment.
9 - Système selon la revendication 1 caractérisé en ce que l'émetteur comprend en outre un circuit de modulation audio (10) pour la transmission d'une information sonore. 9 - System according to claim 1 characterized in that the transmitter further comprises an audio modulation circuit (10) for transmitting sound information.
10 - Boîtier antivol, selon l'une des revendications 6 à 8 caractérisé en ce que le moyen de liaison avec un article à protéger est du type macaron alarme, pieuvre, macaron avec lanière alarme, serre col bouteille avec alarme, étiquette auto collante ou insérable avec alarme. 10 - Anti-theft housing, according to one of claims 6 to 8 characterized in that the connecting means with an article to be protected is of the macaroon alarm type, octopus, macaroon with alarm strap, bottle neck collars with alarm, self adhesive label or insertable with alarm.
11 - Le boîtier antivol est à même de pouvoir recevoir plusieurs codes par l'antenne d'émission : à savoir : déclenchement de l'alarme, Test batterie, activation de l'alarme et inhibition de celle-ci de manière volontaire (au moyen d'une antenne spécifique mise entre les mains du responsable de sécurité) . 11 - The antitheft box is able to receive several codes by the transmitting antenna: namely: triggering the alarm, battery test, activation of the alarm and inhibition of it on a voluntary basis (using a specific antenna placed in the hands of the safety manager).
PCT/FR2011/052546 2010-11-02 2011-10-31 Antitheft protection system for self-service item on sale WO2012059678A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1059017 2010-11-02
FR1059017A FR2966960B1 (en) 2010-11-02 2010-11-02 ANTI-THEFT PROTECTION SYSTEM FOR AN ARTICLE AVAILABLE FOR SALE IN FREE SERVICE

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WO2012059678A2 true WO2012059678A2 (en) 2012-05-10
WO2012059678A3 WO2012059678A3 (en) 2012-07-12

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Publication number Priority date Publication date Assignee Title
US20050253725A1 (en) * 2004-05-05 2005-11-17 Trenstar, Inc. Radio frequency identification tag
EP1864082B1 (en) * 2005-03-18 2016-10-26 Gatekeeper Systems, Inc. Two-way communication system for tracking locations and statuses of wheeled vehicles
US20130187755A1 (en) * 2009-04-06 2013-07-25 Eugene Joseph Rogers Systems and methods for managing shopping cart and other wheeled conveyance assets

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WO2012059678A3 (en) 2012-07-12
FR2966960B1 (en) 2013-03-01

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