EP1584062A1 - Detector, system for the identification of articles and method for the production of said detector - Google Patents

Detector, system for the identification of articles and method for the production of said detector

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Publication number
EP1584062A1
EP1584062A1 EP04702726A EP04702726A EP1584062A1 EP 1584062 A1 EP1584062 A1 EP 1584062A1 EP 04702726 A EP04702726 A EP 04702726A EP 04702726 A EP04702726 A EP 04702726A EP 1584062 A1 EP1584062 A1 EP 1584062A1
Authority
EP
European Patent Office
Prior art keywords
detector
segments
antenna
turns
articles
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.)
Withdrawn
Application number
EP04702726A
Other languages
German (de)
French (fr)
Inventor
Philippe Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tagsys SAS
Original Assignee
Tagsys SAS
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
Application filed by Tagsys SAS filed Critical Tagsys SAS
Publication of EP1584062A1 publication Critical patent/EP1584062A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10346—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the far field type, e.g. HF types or dipoles
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10158—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
    • G06K7/10178—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers

Definitions

  • the present invention relates to the field of systems for identifying objects or articles carrying a radiofrequency antenna of the RF-ID type associated with an electronic circuit so as to be interrogated by an interrogation device comprising a radiofrequency antenna. It applies in particular, but not exclusively, to the identification of CDs or DVDs in movie rental / sale stores.
  • a machine for renting DVDs and video cassettes comprising an identification device comprising a conventional antenna, that is to say consisting of a conductive element arranged in a spiral extending in one plan.
  • the field generated by this antenna is located in a plane perpendicular to the plane of the spiral and feeds an intermediate element.
  • This intermediate element conventionally consists of a printed circuit comprising an LC circuit with passive antenna tuned to the frequency of 13.56 MHz (Megahertz) which is particularly fine for being inserted in the housings of the rental articles; said intermediate element in turn supplying the contactless label carried by each of the articles.
  • the magnetic field generated by the identification device is strong enough to supply the intermediate element.
  • the invention therefore aims to remedy this drawback.
  • an article detector comprising a contactless RF-ID label, said detector comprising at least one antenna formed of N loops and M turns, (M, N) integer greater than or equal to 1, characterized in that at least one of said turns consists of at least two complementary segments, the two segments not being coplanar, it that is to say that the addition from the ends of one of the segments of the other segment constitutes a turn, and are each present on two layers of different substrates.
  • the detector according to the invention could also be envisaged for recording, or entering, data or information in the contactless label of the article.
  • At least one of the turns of the antenna will consist of at least two segments extending in different planes.
  • the planes in which the two above-mentioned segments extend will be parallel to each other.
  • each of two consecutive segments will be connected together by a bridge.
  • connection between the ends of the segments will be such that the above-mentioned antenna has N loops with 1 turn.
  • connection between the ends of the segments will be such that the above-mentioned antenna has 1 loop with N turns.
  • the above-mentioned bridge will extend perpendicular to the planes of said turns segments.
  • the present invention also relates to a system for the identification of articles comprising contactless RF-ID type labels, comprising a detector for detecting said labels, as well as an antenna formed by several turns, characterized in that at least one of said turns consists of at least two complementary segments, the two segments not being coplanar and in that the above-mentioned detector comprises a thin envelope comprising an electrical circuit.
  • the above-mentioned antenna will be included in a substantially parallelepipedic card, having two large parallel faces.
  • the above electric circuit will extend in a plane substantially perpendicular to the planes of the above large parallel faces of the card.
  • the above electrical circuit will extend parallel to the contactless RF-ID type label of the article.
  • the articles will be placed close to each other, at a distance of less than 40 millimeters (mm), preferably a distance of less than 15 mm.
  • the above antenna will be tuned, with an impedance of 50 ⁇ (ohms) with zero phase shift, at the frequency of 13.56 MHz (Megahertz).
  • the present invention also relates to a method of manufacturing a detector as mentioned above, said method comprising the steps of: - producing at least one electrically conductive segment respectively on a plurality of substrates, multilayer assembly of said substrates.
  • the manufacturing process will also include a step of making a connection, or bridging, between the different segments of each of the substrates.
  • the invention makes it possible to detect and find without fault and without risk of confusion, a particular item requested by a user.
  • FIG. 1 illustrates a schematic view of a detector according to the invention, of an intermediate element and of a DVD bearing an RF-ID label;
  • FIG. 2 illustrates a perspective view of the detector with an antenna according to the invention and an electronic supply circuit
  • FIG. 3 illustrates a front view of the various substrates constituting a detector according to the invention.
  • a DVD rental machine not shown in the figures, generally uses cylindrical trays, the end of which includes a plurality of housings each containing a DVD.
  • the DVD 1 comprises a contactless label 2, for example of the RF-ID type, placed in the center of the DVD 1.
  • This RF-ID 2 label also known as an electronic label, comprises a radio frequency antenna associated with an electronic circuit.
  • the electronic circuit comprises at least one memory containing the identification characteristics of the article, in this case in particular the title of the film.
  • FIG. 1 also illustrates an intermediate element 3 intended to transmit an electromagnetic field up to the aforesaid label 2.
  • This intermediate element 3, of rectangular shape, consists of an extremely fine envelope comprising an electrical circuit 5.
  • the electrical circuit 5 s extends over the entire length of the envelope 4 so that one of its ends is disposed near the detector 6 according to the invention while the other end is disposed near the contactless label 2 carried by the 1.
  • the intermediate element 3, consisting of a passive antenna, is necessary in the particular type of use of a DVD rental machine as described previously because the housings containing the DVDs are narrow and do not allow the detector 6 to be placed directly adjacent to the contactless label 2 of article 1.
  • a passive antenna is conventionally made up of a capacitor and an antenna, coil or coil. This passive antenna is usually tuned to the frequency of 13.56 MHz.
  • the detector 6 of the invention comprises several layers of substrates 7, 8, 9, 10, 11 on which at least one segment 12 of electrical conductor is present.
  • the substrate layers 7, 8, 9, 10, 11 comprising a conductive segment 12 are produced in a conventional manner, for example either by etching a conductive plate or by depositing a metal or an electrically conductive alloy on a non-conductive substrate.
  • the substrate layers 7, 8, 9, 10, 11 are joined to each other to form the multi-layer detector 6, having the shape of a parallelepipedic card, to present an antenna 13 formed of a plurality of segments 12 arranged in different planes and connected by bridges 14 also conductive.
  • the method of fixing the different substrate layers 7, 8, 9, 10, 11 is known to one skilled in the art and uses, for example, bonding.
  • the detector 6 of the invention therefore comprises an antenna 13 made up of a plurality of segments 12 by bridges 14; said antenna 13 being associated with an electronic circuit 15 comprising the conventional elements for generating an electromagnetic field with this antenna 13, namely in particular at least one capacitor and a source of electric power, possibly external.
  • the segments 12 of the antenna 13 can be connected essentially in two distinct ways.
  • each segment 12 is connected by a separate bridge 16 to another segment 12 so that the antenna 13 forms a single loop having 4 turns.
  • turn is meant a complete winding, either over 360 °, or partial, over less than 360 °, of a part of the antenna 13.
  • a turn is constituted by a connection between segments 12, together forming a tower complete, or partial, to return to the axis of an arbitrarily chosen starting point.
  • Loop is understood to mean a winding of the antenna without intersection, that is to say without crossing with more than two directions.
  • the antenna 13 according to the invention is formed of N loops and M turns, (M, N) integer greater than or equal to 1.
  • the antenna 13 according to the invention has a remarkable effect because it makes it possible to propagate a sufficiently strong magnetic field along at least one of its sides, or edges, of the parallelepipedic card constituting the detector 6, that is to say say by the short sides perpendicular to the two large parallel faces 17 of the card. Thanks to this device, the detector 6 can be brought close to the intermediate element 3 by the edge and supply the latter satisfactorily.
  • the detector 6 thus occupies a reduced space since it can be presented by the edge and provide a magnetic field which is strong enough to power the intermediate element 3.
  • the card or the detector comprising the antenna is necessarily presented from the front, since there is no magnetic field propagated along the short sides, or an electromagnetic field so weak that it does not allow the intermediate element 3 to be supplied.
  • one of the objectives of the present invention is to solve the problems of identification when the above articles 1 are arranged substantially parallel to each other, and at a distance of the order of 14 millimeters.
  • the detector according to the invention can also be envisaged in different applications, in particular in a library%
  • the cited detector is connected to an RFID reader which supplies it with energy making it possible to generate an electromagnetic field at the latter.
  • this antenna, or detector delivers a very directive magnetic field which, therefore, only illuminates the elements placed in its beam.
  • the operation considered here namely the inventory of books in a library, consists in reading or decoding electronic labels placed in books and allowing their individual identification.
  • This antenna or detector, performs this operation very quickly, without moving the structures from their rental and storage, since when the antenna is moved throughout the structures, very few elements are energized at the same time , and are therefore decoded one after the other faster than if a large number of these elements were active at the same time; indeed, in this case, the operation would be slowed down by the anti-collision process.
  • this antenna has the capacity to identify the elements one after the other, this operation also makes it possible to give the order in which the works are placed, and therefore to detect badly positioned elements or to locate an element precisely. among the whole.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Electromagnetism (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Artificial Intelligence (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Health & Medical Sciences (AREA)
  • Burglar Alarm Systems (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

The invention relates to a detector of articles comprising a contactless RF-ID type label. Said device comprises at least one antenna (13) formed by N loops and M turns, (M, N) together being greater than or equal to 1, characterized in that at least one of said turns is made up of at least two complementary segments (12), said two segments not being coplanar. The present invention also relates to an identification system comprising said detector and to a method for the production of said detector.

Description

DÉTECTEUR, SYSTÈME POUR L'IDENTIFICATION D'ARTICLES ET PROCÉDÉ DE FABRICATION DU DÉTECTEUR DETECTOR, SYSTEM FOR IDENTIFYING ARTICLES, AND METHOD FOR MANUFACTURING THE DETECTOR
La présente invention se rapporte au domaine de systèmes d'identification d'objets ou d'articles portant une antenne radiofréquence de type RF-ID associé à un circuit électronique de manière à être interrogé par un dispositif d'interrogation comprenant une antenne radiofréquence. Elle s'applique en particulier, mais non exclusivement, à l'identification de CDs ou DVDs dans les magasins de location/vente de films .The present invention relates to the field of systems for identifying objects or articles carrying a radiofrequency antenna of the RF-ID type associated with an electronic circuit so as to be interrogated by an interrogation device comprising a radiofrequency antenna. It applies in particular, but not exclusively, to the identification of CDs or DVDs in movie rental / sale stores.
Dans la suite, on a choisi d'appliquer l'invention à un appareil délivrant des DVDs dans lequel les DVDs, portant chacun une étiquette sans contact de type RF-ID, sont rangés à proximité les uns des autres, soit une distance inférieure à 15 millimètres (mm) . Bien entendu, la présente invention pourra trouver une utilité dans diverses autres applications .In the following, we have chosen to apply the invention to a device delivering DVDs in which the DVDs, each carrying a contactless RF-ID type label, are stored close to each other, ie a distance less than 15 millimeters (mm). Of course, the present invention may find utility in various other applications.
À l'heure actuelle, on connaît une machine de location de DVDs ainsi que de vidéo cassettes comprenant un dispositif d'identification comportant une antenne classique, c'est-à-dire constituée d'un élément conducteur disposé en spirale s 'étendant dans un seul et même plan. Le champ généré par cette antenne se situe dans un plan perpendiculaire au plan de la spirale et alimente un élément intermédiaire. Cet élément intermédiaire consiste classiquement en un circuit imprimé comportant un circuit LC à antenne passive accordée à la fréquence de 13,56 MHz (Mégahertz) particulièrement fin pour être inséré dans les logements des articles en location ; ledit élément intermédiaire alimentant à son tour 1 ' étiquette sans contact portée par chacun des articles. Bien entendu, il est impératif que le champ magnétique généré par le dispositif d'identification soit suffisamment fort pour permettre d'alimenter l'élément intermédiaire.At the present time, a machine is known for renting DVDs and video cassettes comprising an identification device comprising a conventional antenna, that is to say consisting of a conductive element arranged in a spiral extending in one plan. The field generated by this antenna is located in a plane perpendicular to the plane of the spiral and feeds an intermediate element. This intermediate element conventionally consists of a printed circuit comprising an LC circuit with passive antenna tuned to the frequency of 13.56 MHz (Megahertz) which is particularly fine for being inserted in the housings of the rental articles; said intermediate element in turn supplying the contactless label carried by each of the articles. Of course, it is imperative that the magnetic field generated by the identification device is strong enough to supply the intermediate element.
Cette configuration fonctionne relativement bien pour les machines de location classiques, dans lesquelles les DVDs et/ou les vidéo-cassettes sont espacés d'une distance conséquente, habituellement d'environ 40 millimètres. Ainsi, du fait de cette distance séparant deux étiquettes RF-ID, les risques de confusion du dispositif d'identification sont relativement minimes .This configuration works relatively well for conventional rental machines, in which DVDs and / or video cassettes are spaced a considerable distance apart, usually about 40 millimeters. Thus, because of this distance separating two RF-ID labels, the risks of confusion of the identification device are relatively minimal.
Néanmoins, les machines de locations actuelles présentent 1 ' inconvénient d ' être encombrantes et de ne pas pouvoir contenir un nombre important d'articles en location. Ainsi, il a été proposé un nouveau type de machine de locations dans lequel les DVDs et/ou les vidéo-cassettes sont espacés d'une distance, réduite, inférieure à 15 millimètres, permettant ainsi de contenir un nombre beaucoup plus grand d'articles en location.However, current rental machines have the disadvantage of being bulky and of not being able to contain a large number of rental items. Thus, a new type of rental machine has been proposed in which the DVDs and / or the video cassettes are spaced by a distance, reduced, less than 15 millimeters, thus making it possible to contain a much greater number of articles. for rent.
Malheureusement, les dispositifs d'identification actuels ne permettent pas d'identifier sans faille les étiquettes sans contact de type RF-ID présentes sur des articles quand ces derniers sont si proches les uns des autres. En effet, la proximité des étiquettes RF-ID a pour conséquence que le dispositif d'identification va "voir" plusieurs étiquettes se trouvant dans le champ généré par le dispositif d'identification.Unfortunately, current identification devices do not allow flawless identification of contactless RF-ID labels present on articles when the latter are so close to each other. Indeed, the proximity of the RF-ID labels has the consequence that the identification device will "see" several labels found in the field generated by the identification device.
L'invention a donc pour but de remédier à cet inconvénient. Elle propose à cet effet un détecteur d'articles comprenant une étiquette sans contact de type RF- ID, ledit détecteur comportant au moins une antenne formée de N boucles et M spires, (M, N) entier supérieur ou égal à 1, caractérisé en ce qu'au moins une desdites spires est constituée d'au moins deux segments complémentaires, les deux segments n'étant pas coplanaires, c'est-à-dire que l'ajout à partir des extrémités d'un des segments de l'autre segment constitue une spire, et sont présents chacun sur deux couches de substrats différentes .The invention therefore aims to remedy this drawback. To this end, it provides an article detector comprising a contactless RF-ID label, said detector comprising at least one antenna formed of N loops and M turns, (M, N) integer greater than or equal to 1, characterized in that at least one of said turns consists of at least two complementary segments, the two segments not being coplanar, it that is to say that the addition from the ends of one of the segments of the other segment constitutes a turn, and are each present on two layers of different substrates.
Bien entendu, le détecteur selon l'invention pourra également être envisagé pour l'enregistrement, ou la saisie, de données ou d'informations dans l'étiquette sans contact de l'article.Of course, the detector according to the invention could also be envisaged for recording, or entering, data or information in the contactless label of the article.
On entend par "segments complémentaires" le fait que l'ajout, à partir des extrémités des segments des autres segments, constitue un segment s ' étendant sur 360°, également dénommé par la suite spire complète.By "complementary segments" is meant the fact that the addition, from the ends of the segments of the other segments, constitutes a segment extending over 360 °, also referred to hereinafter as a complete turn.
Avantageusement, au moins une des spires de l'antenne sera constituée d'au moins deux segments s ' étendant dans des plans différents. De la même manière, les plans dans lesquels s'étendent les deux susdits segments seront parallèles entre eux.Advantageously, at least one of the turns of the antenna will consist of at least two segments extending in different planes. In the same way, the planes in which the two above-mentioned segments extend will be parallel to each other.
De préférence, les extrémités de chacun de deux segments consécutifs seront reliées entre elles par un pont.Preferably, the ends of each of two consecutive segments will be connected together by a bridge.
Selon un mode d'exécution de l'invention, la liaison entre les extrémités des segments sera telle que la susdite antenne présente N boucles à 1 spire.According to one embodiment of the invention, the connection between the ends of the segments will be such that the above-mentioned antenna has N loops with 1 turn.
Selon un autre mode d'exécution de l'invention, la liaison entre les extrémités des segments sera telle que la susdite antenne présente 1 boucle à N spires . Selon une possibilité offerte par l'invention, le susdit pont s'étendra perpendiculairement aux plans desdits segments de spire.According to another embodiment of the invention, the connection between the ends of the segments will be such that the above-mentioned antenna has 1 loop with N turns. According to a possibility offered by the invention, the above-mentioned bridge will extend perpendicular to the planes of said turns segments.
La présente invention se rapporte également à un système pour l'identification d'articles comprenant des étiquettes sans contact de type RF-ID, comportant un détecteur pour détecter lesdites étiquettes, ainsi qu'une antenne formée de plusieurs spires, caractérisé en ce qu'au moins une desdites spires est constituée d'au moins deux segments complémentaires, les deux segments n'étant pas coplanaires et en ce que le susdit détecteur comprend une enveloppe mince comportant un circuit électrique.The present invention also relates to a system for the identification of articles comprising contactless RF-ID type labels, comprising a detector for detecting said labels, as well as an antenna formed by several turns, characterized in that at least one of said turns consists of at least two complementary segments, the two segments not being coplanar and in that the above-mentioned detector comprises a thin envelope comprising an electrical circuit.
Selon un mode d'exécution de l'invention, la susdite antenne sera comprise dans une carte sensiblement parallélépipédique, disposant de deux grandes faces parallèles.According to one embodiment of the invention, the above-mentioned antenna will be included in a substantially parallelepipedic card, having two large parallel faces.
De préférence, le susdit circuit électrique s'étendra dans un plan sensiblement perpendiculaire aux plans des susdites grandes faces parallèles de la carte. Dans ce cas, le susdit circuit électrique s'étendra parallèlement à l'étiquette sans contact de type RF-ID de l'article.Preferably, the above electric circuit will extend in a plane substantially perpendicular to the planes of the above large parallel faces of the card. In this case, the above electrical circuit will extend parallel to the contactless RF-ID type label of the article.
Selon un aspect avantageux de l'invention, les articles seront disposés à proximité les uns des autres, à une distance inférieure à 40 millimètres (mm) , de préférence une distance inférieure à 15 mm.According to an advantageous aspect of the invention, the articles will be placed close to each other, at a distance of less than 40 millimeters (mm), preferably a distance of less than 15 mm.
De préférence, la susdite antenne sera accordée, avec une impédance de 50 Ω (ohms) avec un déphasage nulle, à la fréquence de 13,56 MHz (Mégahertz). La présente invention porte également sur un procédé de fabrication d'un détecteur comme mentionné précédemment, ledit procédé comprenant les étapes de : - réalisation d'au moins un segment conducteur électrique respectivement sur une pluralité de substrats, assemblage multicouche desdits substrats.Preferably, the above antenna will be tuned, with an impedance of 50 Ω (ohms) with zero phase shift, at the frequency of 13.56 MHz (Megahertz). The present invention also relates to a method of manufacturing a detector as mentioned above, said method comprising the steps of: - producing at least one electrically conductive segment respectively on a plurality of substrates, multilayer assembly of said substrates.
Avantageusement, le procédé de fabrication comprendra également une étape de réalisation de liaison, ou pontage, entre les différents segments de chacun des substrats.Advantageously, the manufacturing process will also include a step of making a connection, or bridging, between the different segments of each of the substrates.
Grâce à ces particularités, l'invention permet de détecter et de retrouver sans faille et sans risque de confusion, un article particulier demandé par un utilisateur.Thanks to these features, the invention makes it possible to detect and find without fault and without risk of confusion, a particular item requested by a user.
On comprendra mieux l'invention à l'aide de la description, faite ci-après à titre purement explicatif, d'un mode de réalisation de l'invention, en référence aux figures annexées :The invention will be better understood using the description, given below for purely explanatory purposes, of an embodiment of the invention, with reference to the appended figures:
la figure 1 illustre une vue schématique d'un détecteur selon l'invention, d'un élément intermédiaire et d'un DVD portant une étiquette RF-ID ;FIG. 1 illustrates a schematic view of a detector according to the invention, of an intermediate element and of a DVD bearing an RF-ID label;
la figure 2 illustre une vue en perspective du détecteur avec une antenne selon 1 ' invention et un circuit électronique d ' alimentation ;FIG. 2 illustrates a perspective view of the detector with an antenna according to the invention and an electronic supply circuit;
la figure 3 illustre une vue de face des différents substrats constituant un détecteur selon 1' invention. Une machine de location de DVDs, non représenté sur les figures, utilise généralement des plateaux cylindriques dont 1 ' extrémité comprend une pluralité de logement contenant chacun un DVD.FIG. 3 illustrates a front view of the various substrates constituting a detector according to the invention. A DVD rental machine, not shown in the figures, generally uses cylindrical trays, the end of which includes a plurality of housings each containing a DVD.
Comme illustré sur la figure 1, le DVD 1 comprend une étiquette sans contact 2, par exemple de type RF-ID, disposée au centre du DVD 1. Cette étiquette RF-ID 2, également dénommée étiquette électronique, comprend une antenne radiofréquence associée à un circuit électronique. Le circuit électronique comprend au moins une mémoire contenant les caractéristiques d'identification de l'article, en l'occurrence notamment le titre du film. Lorsque cette étiquette est interrogée par un dispositif d'interrogation, via un champ électromagnétique, l'étiquette 2 émet en retour un message contenant les informations demandées .As illustrated in FIG. 1, the DVD 1 comprises a contactless label 2, for example of the RF-ID type, placed in the center of the DVD 1. This RF-ID 2 label, also known as an electronic label, comprises a radio frequency antenna associated with an electronic circuit. The electronic circuit comprises at least one memory containing the identification characteristics of the article, in this case in particular the title of the film. When this label is interrogated by an interrogation device, via an electromagnetic field, the label 2 sends back a message containing the requested information.
Le circuit électronique ainsi que la communication d'une étiquette sans contact 2 du type RF-ID est bien connu et ne sera pas décrit de manière plus détaillée ici.The electronic circuit as well as the communication of a contactless label 2 of the RF-ID type is well known and will not be described in more detail here.
La figure 1 illustre également un élément intermédiaire 3 destiné à transmettre un champ électromagnétique jusqu'à la susdite étiquette 2. Cet élément intermédiaire 3, de forme parallélépipédique, consiste en une enveloppe extrêmement fine comportant un circuit électrique 5. Le circuit électrique 5 s'étend sur toute la longueur de 1 ' enveloppe 4 de sorte que 1 ' ne de ses extrémités est disposée à proximité du détecteur 6 selon l'invention tandis que l'autre extrémité est disposée à proximité de l'étiquette sans contact 2 porté par l'article 1. L'élément intermédiaire 3, consistant en une antenne passive, est nécessaire dans le type d'usage particulier d'une machine de location de DVDs telle que décrite précédemment car les logements comportant les DVDs sont étroits et ne permettent pas au détecteur 6 d ' être placé directement contigu à l ' étiquette sans contact 2 de l ' article 1.FIG. 1 also illustrates an intermediate element 3 intended to transmit an electromagnetic field up to the aforesaid label 2. This intermediate element 3, of rectangular shape, consists of an extremely fine envelope comprising an electrical circuit 5. The electrical circuit 5 s extends over the entire length of the envelope 4 so that one of its ends is disposed near the detector 6 according to the invention while the other end is disposed near the contactless label 2 carried by the 1. The intermediate element 3, consisting of a passive antenna, is necessary in the particular type of use of a DVD rental machine as described previously because the housings containing the DVDs are narrow and do not allow the detector 6 to be placed directly adjacent to the contactless label 2 of article 1.
On rappelle ici qu ' une antenne passive est classiquement constituée d'un condensateur et d'une antenne , bobine ou spire . Cette antenne passive est habituellement accordée à la fréquence de 13 , 56 MHz .It is recalled here that a passive antenna is conventionally made up of a capacitor and an antenna, coil or coil. This passive antenna is usually tuned to the frequency of 13.56 MHz.
Le détecteur 6 de l'invention comprend plusieurs couches de substrats 7, 8, 9, 10, 11 sur lesquelles au moins un segment 12 conducteur électrique est présent. Les couches de substrat 7, 8, 9, 10, 11 comportant un segment conducteur 12 sont réalisées de manière classique, par exemple soit par gravure d'une plaque conductrice soit par dépôt d'un métal ou d'un alliage électriquement conducteur sur un substrat non conducteur.The detector 6 of the invention comprises several layers of substrates 7, 8, 9, 10, 11 on which at least one segment 12 of electrical conductor is present. The substrate layers 7, 8, 9, 10, 11 comprising a conductive segment 12 are produced in a conventional manner, for example either by etching a conductive plate or by depositing a metal or an electrically conductive alloy on a non-conductive substrate.
Ensuite, les couches de substrat 7, 8, 9, 10, 11 sont jointes les unes aux autres pour former le détecteur 6 multicouches, ayant la forme d'une carte parallélépipédique, pour présenter une antenne 13 formée d'une pluralité de segments 12 disposés dans des plans différents et reliés par des ponts 14 également conducteurs. Le procédé de fixation des différentes couches de substrat 7, 8, 9, 10, 11 est connu de 1 ' homme du métier et utilise par exemple une fixation par collage.Then, the substrate layers 7, 8, 9, 10, 11 are joined to each other to form the multi-layer detector 6, having the shape of a parallelepipedic card, to present an antenna 13 formed of a plurality of segments 12 arranged in different planes and connected by bridges 14 also conductive. The method of fixing the different substrate layers 7, 8, 9, 10, 11 is known to one skilled in the art and uses, for example, bonding.
Le détecteur 6 de l'invention comprend donc une antenne 13 constituée d'une pluralité de segments 12 par des ponts 14 ; ladite antenne 13 étant associée avec un circuit électronique 15 comportant les éléments classiques pour générer un champ électromagnétique avec cette antenne 13, à savoir notamment au moins un condensateur et une source d'alimentation électrique, éventuellement externe.The detector 6 of the invention therefore comprises an antenna 13 made up of a plurality of segments 12 by bridges 14; said antenna 13 being associated with an electronic circuit 15 comprising the conventional elements for generating an electromagnetic field with this antenna 13, namely in particular at least one capacitor and a source of electric power, possibly external.
Les segments 12 de l'antenne 13 peuvent être reliés essentiellement de deux manières distinctes.The segments 12 of the antenna 13 can be connected essentially in two distinct ways.
Dans un premier mode de réalisation, représenté sur la figure 2, au moins une des extrémités de chaque segment 12 est reliée par un pont 16 distinct à un autre segment 12 de sorte que l'antenne 13 forme une unique boucle présentant 4 spires.In a first embodiment, shown in FIG. 2, at least one of the ends of each segment 12 is connected by a separate bridge 16 to another segment 12 so that the antenna 13 forms a single loop having 4 turns.
On entend par "spire" un enroulement complet, soit sur 360°, ou partiel, sur moins de 360°, d'une partie de l'antenne 13. Ainsi, une spire est constituée par une liaison entre segments 12 formant ensemble un tour complet, ou partiel, pour revenir dans l'axe d'un point de départ choisi arbitrairement.By “turn” is meant a complete winding, either over 360 °, or partial, over less than 360 °, of a part of the antenna 13. Thus, a turn is constituted by a connection between segments 12, together forming a tower complete, or partial, to return to the axis of an arbitrarily chosen starting point.
On entend par "boucle" un enroulement de l'antenne sans intersection, c'est-à-dire sans croisement avec plus de deux directions.“Loop” is understood to mean a winding of the antenna without intersection, that is to say without crossing with more than two directions.
Ainsi, il est également envisageable de réaliser le pontage des segments 12 de l'antenne 13 en reliant directement, et idéalement selon deux axes perpendiculaires, respectivement les extrémités opposées de chaque segment 12. Dans cette configuration, il existe alors N boucles à 1 spire.Thus, it is also possible to carry out the bridging of the segments 12 of the antenna 13 by connecting directly, and ideally along two perpendicular axes, respectively the opposite ends of each segment 12. In this configuration, there are then N loops with 1 turn .
Ainsi, dans son acceptation la plus large, l'antenne 13 selon l'invention est formée de N boucles et M spires, (M, N) entier supérieur ou égal à 1. L'antenne 13 selon l'invention présente un effet remarquable car elle permet de propager un champ magnétique suffisamment puissant suivant au moins l'un de ses côtés, ou tranches, de la carte parallélépipédique constituant le détecteur 6, c'est-à-dire par les petits côtés perpendiculaires aux deux grandes faces 17 parallèles de la carte. Grâce à ce dispositif, le détecteur 6 peut être amené à proximité de 1 ' élément intermédiaire 3 par la tranche et alimenter ce dernier de manière satisfaisante.Thus, in its widest acceptance, the antenna 13 according to the invention is formed of N loops and M turns, (M, N) integer greater than or equal to 1. The antenna 13 according to the invention has a remarkable effect because it makes it possible to propagate a sufficiently strong magnetic field along at least one of its sides, or edges, of the parallelepipedic card constituting the detector 6, that is to say say by the short sides perpendicular to the two large parallel faces 17 of the card. Thanks to this device, the detector 6 can be brought close to the intermediate element 3 by the edge and supply the latter satisfactorily.
Le détecteur 6 occupe ainsi un espace réduit puisqu ' il peut être présenté par la tranche et dispenser un champ magnétique suffisant puissant pour alimenter l'élément intermédiaire 3. Dans les systèmes de l'art antérieur, la carte ou le détecteur comportant l'antenne est nécessairement présenté(e) de face, car il n'existe aucun champ magnétique propagé suivant les petits côtés, ou un champ électromagnétique tellement faible qu ' il ne permet pas d'alimenter l'élément intermédiaire 3.The detector 6 thus occupies a reduced space since it can be presented by the edge and provide a magnetic field which is strong enough to power the intermediate element 3. In the systems of the prior art, the card or the detector comprising the antenna is necessarily presented from the front, since there is no magnetic field propagated along the short sides, or an electromagnetic field so weak that it does not allow the intermediate element 3 to be supplied.
Il est rappelé que l'un des objectifs de la présente invention est de résoudre les problèmes d'identification lorsque les susdits articles 1 sont disposés sensiblement parallèlement les uns par rapport aux autres, et à une distance de l'ordre de 14 millimètres.It is recalled that one of the objectives of the present invention is to solve the problems of identification when the above articles 1 are arranged substantially parallel to each other, and at a distance of the order of 14 millimeters.
Le détecteur selon l'invention peut également être envisagé dans différentes applications, notamment dans une bibliothèque % Le détecteur cité est relié à un lecteur RFID qui lui délivre une énergie permettant de générer au niveau de celle-ci un champ électromagnétique. Par construction, cette antenne, ou détecteur, délivre un champ magnétique très directif qui, de ce fait, n'illumine que les éléments placés dans son faisceau. L'opération considérée ici, à savoir l'inventaire d'ouvrages dans une bibliothèque, consiste à effectuer la lecture ou le décodage d'étiquettes électroniques placées dans des ouvrages et permettant leur identification individuelle.The detector according to the invention can also be envisaged in different applications, in particular in a library% The cited detector is connected to an RFID reader which supplies it with energy making it possible to generate an electromagnetic field at the latter. By construction, this antenna, or detector, delivers a very directive magnetic field which, therefore, only illuminates the elements placed in its beam. The operation considered here, namely the inventory of books in a library, consists in reading or decoding electronic labels placed in books and allowing their individual identification.
Cette antenne, ou détecteur, réalise cette opération de manière très rapide, sans déplacer les ouvrages de leur location et rangement, étant donné que lors du déplacement de l'antenne tout au long des ouvrages, très peu d'éléments sont énergisés au même moment, et sont donc décodés les uns après les autres plus rapidement que si un grand nombre de ces éléments étaient actifs en même temps ; en effet, dans ce cas, l'opération serait ralentie par le processus d' anticollision. De plus, comme cette antenne a la capacité d'identifier les éléments les uns après les autres, cette opération permet aussi de donner l'ordre dans lequel les ouvrages sont placés, et donc de détecter les éléments mal positionnés ou de localiser précisément un élément parmi l'ensemble.This antenna, or detector, performs this operation very quickly, without moving the structures from their rental and storage, since when the antenna is moved throughout the structures, very few elements are energized at the same time , and are therefore decoded one after the other faster than if a large number of these elements were active at the same time; indeed, in this case, the operation would be slowed down by the anti-collision process. In addition, as this antenna has the capacity to identify the elements one after the other, this operation also makes it possible to give the order in which the works are placed, and therefore to detect badly positioned elements or to locate an element precisely. among the whole.
L'invention est décrite dans ce qui précède à titre d'exemple. Il est entendu que l'homme du métier est à même de réaliser différentes variantes de 1 ' invention sans pour autant sortir du cadre du brevet. The invention is described in the foregoing by way of example. It is understood that a person skilled in the art is able to produce different variants of the invention without going beyond the scope of the patent.

Claims

REVENDICATIONS
1. Détecteur (6) d'articles (1) comprenant une étiquette sans contact (2) de type RF-ID, ledit détecteur comportant au moins une antenne (13) formée de N boucles et M spires, (M, N) entier supérieur ou égal à 1, caractérisé en ce qu'au moins une desdites spires est constituée d'au moins deux segments (12) complémentaires, les deux segments1. Detector (6) of articles (1) comprising a contactless label (2) of RF-ID type, said detector comprising at least one antenna (13) formed of N loops and M turns, (M, N) whole greater than or equal to 1, characterized in that at least one of said turns consists of at least two complementary segments (12), the two segments
(12) n'étant pas coplanaires, c'est-à-dire que l'ajout à partir des extrémités d'un des segments de l'autre segment constitue une spire, et sont présents chacun sur deux couches de substrats différentes (7, 8, 9, 10, 11).(12) not being coplanar, that is to say that the addition from the ends of one of the segments of the other segment constitutes a turn, and are each present on two different layers of substrates (7 , 8, 9, 10, 11).
2. Détecteur (6) selon la revendication 1, caractérisé en ce qu'au moins une des spires de l'antenne2. Detector (6) according to claim 1, characterized in that at least one of the turns of the antenna
(13) est constituée d'au moins deux segments (12) s 'étendant dans des plans différents.(13) consists of at least two segments (12) extending in different planes.
3. Détecteur (6) selon la revendication 2, caractérisé en ce que les plans dans lesquels s'étendent les deux susdits segments (12) sont parallèles entre eux.3. Detector (6) according to claim 2, characterized in that the planes in which the two above-mentioned segments (12) extend are parallel to each other.
4. Détecteur (6) selon la revendication 2 ou 3 , caractérisé en ce que les extrémités de chacun de deux segments (12) consécutifs sont reliées entre elles par un pont (14) .4. Detector (6) according to claim 2 or 3, characterized in that the ends of each of two consecutive segments (12) are interconnected by a bridge (14).
5. Détecteur (6) selon la revendication 4, caractérisé en ce que la liaison entre les extrémités des segments (12) est telle que la susdite antenne (13) présente N boucles à 1 spire.5. Detector (6) according to claim 4, characterized in that the connection between the ends of the segments (12) is such that the above antenna (13) has N loops with 1 turn.
6. Détecteur ( 6 ) selon la revendication 4 r caractérisé en ce que la liaison entre les extrémités des segments (12) est telle que la susdite antenne (13) présente 1 boucle à N spires.6. Detector (6) according to claim 4 r characterized in that the connection between the ends of the segments (12) is such that the above antenna (13) has 1 loop with N turns.
7. Détecteur (6) selon la revendication 4, caractérisé en ce que le susdit pont (14) s'étend dans perpendiculairement aux plans desdits segments (12) de spire.7. Detector (6) according to claim 4, characterized in that the aforesaid bridge (14) extends in perpendicular to the planes of said segments (12) of turn.
8. Système pour l'identification d'articles (1) comprenant des étiquettes sans contact (2) de type RF-ID, comportant un élément intermédiaire (3), ainsi qu'une antenne (13) formée de plusieurs spires, caractérisé en ce qu'au moins une desdites spires est constituée d'au moins deux segments (12) complémentaires, les deux segments (12) n'étant pas coplanaires et en ce que le susdit élément intermédiaire (3) comprend une enveloppe (4) mince comportant un circuit électrique (5).8. System for the identification of articles (1) comprising contactless labels (2) of the RF-ID type, comprising an intermediate element (3), as well as an antenna (13) formed of several turns, characterized in that at least one of said turns consists of at least two complementary segments (12), the two segments (12) not being coplanar and in that the above intermediate element (3) comprises a thin envelope (4) comprising an electrical circuit (5).
9. Système selon la revendication 8, caractérisé en ce que la susdite antenne (13) est comprise dans une carte sensiblement parallélépipédique, disposant de deux grandes faces (17) parallèles.9. System according to claim 8, characterized in that the above antenna (13) is included in a substantially rectangular card, having two large parallel faces (17).
10. Système selon les revendications 8 et 9, caractérisé en ce que le susdit circuit électrique (5) s'étend dans un plan sensiblement perpendiculaire aux plans des susdites grandes faces (17) parallèles de la carte.10. System according to claims 8 and 9, characterized in that the above electric circuit (5) extends in a plane substantially perpendicular to the planes of the above large faces (17) parallel to the card.
11. Système selon l'une des revendications 8 ou , caractérisé en ce que le susdit circuit électrique (5) s'étend parallèlement à l'étiquette sans contact (2) de type RF-ID de l'article (1). 11. System according to one of claims 8 or, characterized in that the above electric circuit (5) extends parallel to the contactless label (2) of the RF-ID type of the article (1).
12. Système selon la revendication 8, caractérisé en ce que les susdits articles (1) sont disposés sensiblement parallèlement les uns par rapport aux autres .12. System according to claim 8, characterized in that the aforesaid articles (1) are arranged substantially parallel to each other.
13. Système selon la revendication 8, caractérisé en ce que les articles (1) sont disposés à proximité les uns des autres, à une distance inférieure à 40 millimètres (mm), de préférence une distance inférieure à 15 mm.13. The system of claim 8, characterized in that the articles (1) are arranged close to each other, at a distance less than 40 millimeters (mm), preferably a distance less than 15 mm.
14. Système selon la revendication 8, caractérisé en ce que la susdite antenne (13) est accordée, avec une impédance de 50 Ω (ohms) avec un déphasage nulle, à la fréquence de 13,56 MHz (Mégahertz).14. System according to claim 8, characterized in that the above antenna (13) is tuned, with an impedance of 50 Ω (ohms) with zero phase shift, at the frequency of 13.56 MHz (Megahertz).
15. Procédé de fabrication d'un détecteur selon l'une quelconque des revendications 1 à 6 , caractérisé en ce qu ' il comprend les étapes suivantes : réalisation d'au moins un segment (12) conducteur électrique respectivement sur une pluralité de substrats ( 7 , 8, 9, 10, 11), assemblage multicouche desdits substrats (7, 8, 9, 10, 11).15. A method of manufacturing a detector according to any one of claims 1 to 6, characterized in that it comprises the following steps: production of at least one segment (12) electrically conductive respectively on a plurality of substrates ( 7, 8, 9, 10, 11), multilayer assembly of said substrates (7, 8, 9, 10, 11).
16. Procédé selon la revendication 15, caractérisé en ce qu'il comprend une étape de réalisation de liaison, ou pontage, entre les différents segments (12) de chacun des16. The method of claim 15, characterized in that it comprises a step of making a connection, or bridging, between the different segments (12) of each of
S'U.-OS'C-1-θ.'CS ( / ξ o f y p O p 11] e S ' U.-OS ' C-1-θ.'CS (/ ξ o f yp O p 11] e
EP04702726A 2003-01-16 2004-01-16 Detector, system for the identification of articles and method for the production of said detector Withdrawn EP1584062A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0300458 2003-01-16
FR0300458A FR2850189B1 (en) 2003-01-16 2003-01-16 DETECTOR, SYSTEM FOR IDENTIFYING ARTICLES AND METHOD FOR MANUFACTURING DETECTOR
PCT/FR2004/000097 WO2004068392A1 (en) 2003-01-16 2004-01-16 Detector, system for the identification of articles and method for the production of said detector

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FR2850189A1 (en) 2004-07-23

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