FR3106425A1 - Radio frequency label comprising a means of destruction and associated method - Google Patents

Abstract

Radio frequency tag comprising means for destroying the tag and associated method Destructible radio frequency tag (1) comprising at least one electronic chip (11) and one radio frequency antenna (12) connected by at least one electronic link (13), said radio frequency tag (1) being characterized in that it comprises at least one manual destruction means (14,15,16,17): of the electronic chip (11) of the radiofrequency tag (1) and / or at least a part of at least one electronic link (13) connecting the radiofrequency antenna (12) and the electronic chip (11) so that at least one electronic link (13) no longer connects the radiofrequency antenna (12) and the electronic chip (11) and that the radiofrequency tag (1) can no longer transmit. Figure to be published with the abstract: Figure 11

Description

Radiofrequency tag comprising a means of destruction and associated method

The technical field of the invention is that of RFID tags (according to the Anglo-Saxon name “Radio Frequency IDentification” for “Radio Frequency Identification” in French), also called RFID tag, radiofrequency tags or radio-labels.

The present invention seeks to render a radiofrequency tag inoperative, in particular to render the radiofrequency tag undetectable by a radiofrequency reader.

TECHNOLOGICAL BACKGROUND OF THE INVENTION

RFID is commonly used in many applications. Indeed, it allows the remote identification of objects, people or even animals. It is used in particular to identify pets, to pay at a contactless payment terminal, at electronic motorway tolls, to check public transport passes, to carry out inventories or to track parts on chains. disassembly.

and [Fig. 1b] each show a schematic representation of a radiofrequency tag 1 known to those skilled in the art.

Label 1 of the has a particular shape where the antenna is spiral.

Label 1 of the has a particular form where the antenna is in two parts, generally a part for the emission and a part for the reception.

The radiofrequency tags 1 represented in FIGS. 1a and 1b, also called RFID tags, RFID tags, or even radio tags, each comprise at least one electronic chip 11 and at least one antenna 12. The tag 1 further comprises a support 19 on which the antenna 12 can be printed, for example by printing conductive ink, and on which the electronic chip can be placed, for example glued. This support 19 can be made of paper type materials, for example paper, cardboard or flexible plastic type material, polymers, or any other material known to those skilled in the art.

As indicated previously, the antenna 12 can be printed in conductive ink. Antenna 12 can be made of copper or any other conductive material. Antenna 12 is designed to operate in a particular frequency band. The operating frequency of the antenna 12 characterizes the frequency of the radiofrequency tag. There are thus low-frequency (LF, for "Low-Frequency"), high-frequency (HF), ultra-high frequency (UHF) and supra-high frequency (SHF) labels. The higher the operating frequency band, the higher the transfer rate and the lower the readability near metal or wet surfaces. Thus, preference will be given to the use of low-frequency tags for animal tracking or access management, high-frequency tags for contactless payment, ultra-high frequency tags for factory applications and assembly lines, and supra-high frequency tags for electronic toll collection, for example.

The electronic chip 11 includes a memory and can include a microprocessor. The memory of the electronic chip is used to store at least one unique identifier making it possible to identify the part or the object associated with the radiofrequency tag. The microprocessor can be useful, for example, when it is necessary to integrate authentication or when it is necessary to secure access to the data contained in the memory.

• Passive: la puce électronique 11 est alimentée par induction électromagnétique par l’onde électromagnétique envoyée par le lecteur à l’étiquette radiofréquence 1.
• Semi-active: seul le microprocesseur de la puce électronique 11 est alimenté en énergie par une alimentation comprise dans l’étiquette radiofréquence 1.
• Active: une alimentation alimente en énergie la puce électronique 11.

The electronic chip 11 is generally made of silicon (SiO2) and can be of three different types:

• Passive: the electronic chip 11 is powered by electromagnetic induction by the electromagnetic wave sent by the reader to the radio frequency tag 1.
• Semi-active: only the microprocessor of the electronic chip 11 is powered by a power supply included in the radio frequency tag 1.
• Active: a power supply supplies energy to the electronic chip 11.

The antenna 12 is electrically connected to the electronic chip 11 by at least one link. This link can be of the same material as the antenna 12. For example, this link can be made of copper, electronic ink, or any other material making it possible to electrically connect the antenna 12 and the electronic chip 11. The radiofrequency tags 1 represented in Figures 1a and 1b each include two links 13 connecting the antenna 12 to the electronic chip 11.

shows a schematic representation of a radiofrequency tag known to those skilled in the art stuck on an object.

The radio frequency tag 1 is attached to the object 2 that it identifies, for example by being glued to it using an adhesive. When a radio frequency reader of the same frequency as the operating frequency of the antenna 12 creates a radio frequency signal and the radio frequency tag 1 receives it, the radio frequency tag 1 returns an identifier stored by the electronic chip 11 in the form of radiofrequency signal to the reader, which demodulates the signal received and then knows the identifier of the radiofrequency tag 1. The operator or the system using the radiofrequency reader is then able to identify the object or the part to which the radio frequency tag is attached.

For example, in aeronautical engine assembly workshops and more particularly on assembly lines, operators must be able to know at all times the location of the parts necessary for the correct assembly of the engines. Said parts intended to be mounted on an engine come from the supply of the workshop with new parts and are monitored until their destruction.

A known state-of-the-art solution consists of a part geolocation method, associated with an inventory database. The method makes it possible to fill in a material management database, and in particular implements one or more portable UHF (for “Ultra High Frequency”) RFID readers, with a defined and known radio identification distance, as well as UHF RFID tags 1 connected to said moving parts 2 which it is desired to locate by radiofrequency signals. These labels 1 are in particular characterized in that they can inform the information making it possible to detect the identification of the part 2 to be traced. A major limitation of this system is the difficulty of no longer detecting part 2, as being in the inventory of parts to be mounted (or destroyed) on an engine, when part 2 is already mounted (respectively destroyed). If they are to be scrapped, these 2 parts must also exit the parts inventory detection system.

Thus, radio frequency tag 1 must be deactivated so that no more information is sent to the inventory database when it is detected.

However, the radio frequency tag 1 remains functional and returns its identifier if a reader interrogates it. This identification can lead to a risk of error during the inventory and it is therefore necessary to stop the detection of this tag 1 via manual or automatic reading.

• la destruction physique de la puce électronique 11 ou de l’antenne 19,
• mettre l’étiquette radiofréquence 1 dans une boite type cage de Faraday,
• générer une impulsion électromagnétique brève et puissante à l’aide d’une bobine qui provoque un choc électromagnétique sur la puce électronique 11 (aussi appelé «zapper RFID»)
• une commande «kill» («tuer» en français), avec authentification au préalable, qui permet à un lecteur RFID d’envoyer un bit dédié permettant de désactiver l’étiquette radiofréquence 1. Cette fonctionnalité n’est pas obligatoire d’après les normes donc l’étiquette radiofréquence 1 doit spécifiquement intégrer cette fonctionnalité.

To stop the detection of a radiofrequency tag 1 via manual or automatic reading, there are several solutions:

• the physical destruction of the electronic chip 11 or the antenna 19,
• put radiofrequency tag 1 in a Faraday cage type box,
• generate a short and powerful electromagnetic pulse using a coil which causes an electromagnetic shock on the electronic chip 11 (also called "RFID zapper")
• a "kill" command ("to kill" in French), with prior authentication, which allows an RFID reader to send a dedicated bit allowing radiofrequency tag 1 to be deactivated. This functionality is not mandatory according to the standards therefore the radiofrequency tag 1 must specifically integrate this functionality.

These solutions require destruction devices in addition to the tag, such as an RFID reader activating the "kill" command, a hammer, a Faraday cage, an RFID zapper, which are not necessarily available at all times in the building, and which hinder the gestures of the operators.

In addition, it is possible to change the identifier of radiofrequency tag 1, for example by setting it to zero. This operation of reprogramming the radio frequency tag 1 to a zero value, in order to be able to use it again in the future for example, requires an additional tool (an RFID reader for example), and can take several minutes.

In addition, the document WO2019082777A1 entitled “Fastening member looseness detection tag” presents an RFID tag for detecting the loosening of a fastening element fixed to a fastening part of a device. This solution makes it possible to deactivate the electrical properties of the radiofrequency tag when the fixing element is moved vis-à-vis the fixed part. The label is then only detectable when the fixing element is fixed correctly. This solution requires having a part of the radio frequency tag on the fixing element and another part of the radio frequency tag on the fixed element, therefore a configuration necessarily comprising these two elements. This solution does not make it possible to render a radio frequency tag undetectable if the latter is stuck on a part or an element without a fixing element.

Another solution is to have the radio frequency tag 1 destroyed by an operator, for example by the operator who has just assembled the part 2 to the engine in an engine assembly workshop, by having him detach the radio frequency tag 1 from part 2 and having him cut out the radio frequency label 1 using scissors. This solution is not reliable, and is long, the operation consisting in detaching the radiofrequency tag 1 can be laborious and the operation consisting in cutting the tag 1 does not make it possible to ensure that the radiofrequency tag 1 is undetectable. Indeed, depending on the cut made in the radio frequency tag, it is possible that the radio frequency tag 1 is still detectable and therefore that this falsifies the inventory in the case where the radio frequency tag 1 is used to identify or locate a part 2. In addition, this operation requires additional tools, in particular at least one cutting tool.

There is therefore a need to be able to make a radiofrequency tag undetectable by a radiofrequency reader regardless of the part on which the radiofrequency tag is installed, without additional tools.

The invention offers a solution to the problems mentioned above, by allowing rapid and reliable manual destruction of the radiofrequency tag, regardless of the part on which the radiofrequency tag is installed.

• de la puce électronique de l’étiquette radiofréquence et/ou
• d’au moins une partie d’au moins un lien électronique reliant l’antenne radiofréquence et la puce électronique de façon qu’au moins un lien électronique ne relie plus l’antenne radiofréquence et la puce électronique et que l’étiquette radiofréquence ne puisse plus émettre.

One aspect of the invention relates to a destructible radiofrequency tag comprising at least one electronic chip and a radiofrequency antenna connected by at least one electronic link, said radiofrequency tag being characterized in that it comprises at least one manual destruction means:

• the electronic chip of the radio frequency tag and/or
• at least a part of at least one electronic link connecting the radiofrequency antenna and the electronic chip so that at least one electronic link no longer connects the radiofrequency antenna and the electronic chip and the radiofrequency tag cannot no longer issue.

• le moyen de destruction manuelle d’au moins une partie d’au moins un lien électronique reliant l’antenne radiofréquence et la puce électronique est configuré pour détruire au moins une partie de chaque lien électronique reliant l’antenne radiofréquence et la puce électronique de façon que chaque lien électronique ne relie plus l’antenne radiofréquence et la puce électronique.
• l’étiquette radiofréquence destructible comprend un support en matériau papier ou en matériau polymère.
• le moyen de destruction manuelle est une pièce comprenant au moins une extrémité accessible manuellement en dehors de l’étiquette, la pièce permettant une destruction d’au moins une zone de l’étiquette radiofréquence, la zone de destruction comprenant :
  • au moins une partie de la puce électronique et/ou
  • au moins une partie d’au moins un lien électronique reliant l’antenne radiofréquence et la puce électronique de façon que la au moins un lien électronique ne relie plus l’antenne radiofréquence et la puce électronique et que l’étiquette radiofréquence ne puisse plus émettre.
• la pièce est choisie parmi au moins un fil, au moins un crochet, au moins une bande en matériau semi-rigide ou rigide.
• le moyen de destruction manuelle est au moins un guide, le guide permettant une destruction selon au moins une trajectoire de l’étiquette radiofréquence, la trajectoire de destruction passant par :
  • au moins une partie de la puce électronique et/ou
  • au moins une partie d’au moins un lien électronique reliant l’antenne radiofréquence et la puce électronique de façon que la au moins un lien électronique ne relie plus l’antenne radiofréquence et la puce électronique et que l’étiquette radiofréquence ne puisse plus émettre.
• le au moins un guide est choisi parmi au moins une découpe en forme de V au niveau d’une bordure de l’étiquette radiofréquence, au moins une languette solidaire de l’étiquette radiofréquence ou au moins une prédécoupe longitudinale.
• l’étiquette radiofréquence destructible comprend au moins un premier moyen de destruction manuelle et au moins un deuxième moyen de destruction manuelle :
  • le premier moyen de destruction manuelle de l’étiquette radiofréquence étant au moins une pièce comprenant au moins une extrémité accessible manuellement en dehors de l’étiquette, la pièce permettant une destruction d’au moins une zone de l’étiquette radiofréquence, la zone de destruction comprenant au moins une partie de la puce électronique et/ou au moins une partie d’au moins un lien électronique reliant l’antenne radiofréquence et la puce électronique de façon que la au moins un lien électronique ne relie plus l’antenne radiofréquence et la puce électronique et que l’étiquette radiofréquence ne puisse plus émettre, la pièce étant choisie parmi un fil, un crochet, une bande en matériau semi-rigide ou rigide, un adhésif,
  • le deuxième moyen de destruction manuelle de l’étiquette radiofréquence étant au moins un guide, le guide permettant une destruction selon au moins une trajectoire de l’étiquette radiofréquence, la trajectoire de destruction passant par au moins une partie de la puce électronique et/ou au moins une partie d’au moins un lien électronique reliant l’antenne radiofréquence et la puce électronique de façon que la au moins un lien électronique ne relie plus l’antenne radiofréquence et la puce électronique et que l’étiquette radiofréquence ne puisse plus émettre, le guide étant choisi parmi au moins une découpe en forme de V, au moins une entaille, au moins une prédécoupe longitudinale.

In addition to the characteristics which have just been mentioned in the previous paragraph, the destructible radio frequency tag according to one aspect of the invention may have one or more additional characteristics among the following, considered individually or according to all technically possible combinations:

• the means for manually destroying at least a part of at least one electronic link connecting the radiofrequency antenna and the electronic chip is configured to destroy at least a part of each electronic link connecting the radiofrequency antenna and the electronic chip in such a way that each electronic link no longer connects the radiofrequency antenna and the electronic chip.
• the destructible radiofrequency tag comprises a support made of paper material or of polymer material.
• the manual destruction means is a part comprising at least one end manually accessible outside the tag, the part allowing destruction of at least one zone of the radiofrequency tag, the destruction zone comprising:
  • at least a part of the electronic chip and/or
  • at least a part of at least one electronic link connecting the radiofrequency antenna and the electronic chip so that the at least one electronic link no longer connects the radiofrequency antenna and the electronic chip and the radiofrequency tag can no longer transmit .
• the part is chosen from at least one wire, at least one hook, at least one strip of semi-rigid or rigid material.
• the manual destruction means is at least one guide, the guide allowing destruction along at least one trajectory of the radiofrequency tag, the destruction trajectory passing through:
  • at least a part of the electronic chip and/or
  • at least a part of at least one electronic link connecting the radiofrequency antenna and the electronic chip so that the at least one electronic link no longer connects the radiofrequency antenna and the electronic chip and the radiofrequency tag can no longer transmit .
• the at least one guide is chosen from at least one V-shaped cutout at an edge of the radiofrequency tag, at least one tab integral with the radiofrequency tag or at least one longitudinal precut.
• the destructible radiofrequency tag comprises at least one first manual destruction means and at least one second manual destruction means:
  • the first means for manual destruction of the radiofrequency tag being at least one part comprising at least one end manually accessible outside the tag, the part allowing destruction of at least one zone of the radiofrequency tag, the zone of destruction comprising at least a part of the electronic chip and/or at least a part of at least one electronic link connecting the radiofrequency antenna and the electronic chip so that the at least one electronic link no longer connects the radiofrequency antenna and the electronic chip and that the radiofrequency tag can no longer emit, the part being chosen from among a wire, a hook, a strip of semi-rigid or rigid material, an adhesive,
  • the second means for manual destruction of the radiofrequency tag being at least one guide, the guide allowing destruction along at least one trajectory of the radiofrequency tag, the destruction trajectory passing through at least a part of the electronic chip and/or at least a part of at least one electronic link connecting the radiofrequency antenna and the electronic chip so that the at least one electronic link no longer connects the radiofrequency antenna and the electronic chip and the radiofrequency tag can no longer transmit , the guide being selected from at least one V-shaped cutout, at least one notch, at least one longitudinal precut.

Another aspect of the invention relates to a system comprising at least one destructible radiofrequency tag according to the invention, at least one support and at least one object, the radiofrequency tag being secured to the support and being connected to the object by the part included in the radio frequency tag, the part being held to the radio frequency tag by the support.

Another aspect of the invention relates to a method for manufacturing a destructible radiofrequency tag according to the invention, characterized in that it comprises at least one step of assembling a radiofrequency tag with a part so that the part comprises at least one manually accessible end outside the radio frequency tag.

Another aspect of the invention relates to a method for manufacturing a destructible radiofrequency tag according to the invention, characterized in that it comprises at least one step of creating a break guide in a radiofrequency tag.

• une étape de création d’un guide de rupture dans une étiquette radiofréquence et
• une étape d’assemblage de l’étiquette radiofréquence avec une pièce de façon que la pièce comprenne au moins une extrémité accessible manuellement en dehors de l’étiquette radiofréquence.

Another aspect of the invention relates to a method for manufacturing a destructible radiofrequency tag according to the invention, characterized in that it comprises at least:

• a step of creating a break guide in a radio frequency tag and
• a step of assembling the radiofrequency tag with a part so that the part includes at least one manually accessible end outside the radiofrequency tag.

Thanks to the invention, it is possible to make a radiofrequency tag undetectable. Indeed, the radiofrequency tag comprises at least one manual destruction means, allowing an operator to reliably destroy the radiofrequency tag.

Thanks to the invention, when the means of manual destruction is a wire, if the wire connects the radiofrequency tag to the part and the wire is removed, the wire systematically renders the radiofrequency tag inoperative without any particular additional operation.

Thus, when, in an assembly workshop for example, a mechanical part comprising a radio frequency tag is installed on an engine for example, an operator who has just installed the mechanical part then has a reliable and rapid means of destroying the radio frequency tag. , making it undetectable by the radio frequency readers in charge, for example, of inventorying and locating the parts to be fitted in the assembly workshop.

The destruction is reliable because the means for destroying the radiofrequency tag destroys the radiofrequency tag so that it is no longer detectable, that is to say that either the electronic chip is destroyed, not allowing the sending of information stored by the electronic chip, or the antenna is no longer completely electrically connected to the electronic chip, not allowing the sending of information stored by the electronic chip either.

The means of manual destruction can be a piece or a tag break guide. In both cases, it is possible to use off-the-shelf radio frequency tags without having to have them manufactured specifically for the intended application. Indeed, the addition of a part can be carried out at the time of gluing the radiofrequency tag to the part that the radiofrequency tag must identify, or even previously, without having to make any modifications to the radiofrequency tag. Additionally, adding a tag break guide can be accomplished by simply pre-cutting a commercial radio frequency tag or by cutting to form a tab.

Thanks to the invention, the operator who has to make the radiofrequency tag undetectable saves considerable time and is certain that the radiofrequency tag is indeed rendered undetectable because it is destroyed reliably.

In addition, the destruction means allow rapid destruction of the radiofrequency tag by facilitating the destruction of the radiofrequency tag, either by a part of which at least one end is manually accessible outside the tag, or by a guide for label breakage.

The invention also finds a particularly advantageous application in anti-theft systems, the radiofrequency tag being able to be destroyed by manual destruction means when an operator has ensured the purchase of the object for which the tag radio frequency serves as an anti-theft device.

The invention and its various applications will be better understood on reading the following description and examining the accompanying figures.

The figures are presented for information only and in no way limit the invention.

Figures 1a and 1b each show a schematic representation of a radio frequency tag.

Figure 2 shows a schematic representation of a radio frequency tag stuck on an object.

Figure 3 shows a schematic representation of a radiofrequency tag according to the invention comprising a wire.

Figures 4a and 4b show a schematic representation of a radiofrequency tag according to the invention comprising a wire secured to an object.

Figure 5 shows a schematic representation of a radio frequency tag according to the invention comprising a strip of rigid or semi-rigid material.

Figure 6 shows a schematic representation of a radiofrequency tag according to the invention comprising a V-shaped cutout on one edge of the tag.

Figure 7 shows a schematic representation of a radio frequency tag according to the invention comprising a V-shaped cutout on one edge of the tag and a longitudinal pre-cut.

Figure 8 shows a schematic representation of a radiofrequency tag according to the invention comprising two V-shaped cutouts on one edge of the tag and two longitudinal pre-cutouts.

Figure 9 shows a schematic representation of a radio frequency tag according to the invention comprising a wire and a longitudinal pre-cut.

Figure 10 shows a schematic representation of a radio frequency tag according to the invention comprising a wire and a V-shaped cutout on one edge of the tag.

Figure 11 shows a schematic representation of a radio frequency tag according to the invention comprising a wire, a V-shaped cutout on one edge of the tag and a longitudinal pre-cut.

The figures are presented for information only and in no way limit the invention.

Unless specified otherwise, the same element appearing in different figures has a single reference.

shows a schematic representation of a radio frequency tag according to the invention comprising a wire.

The radio frequency tag 1 represented in FIG. 3 comprises a support 19, an antenna 12 and an electronic chip 11. The antenna 12 is for example electrically connected to the electronic chip 11 by two links 13.

The radiofrequency tag 1 according to a first embodiment of the invention is represented in FIG. 3 and comprises means for destroying the radiofrequency tag 1.

The term “means of destruction” means any means making it possible to destroy the radiofrequency tag 1 reliably.

“Destruction” means the action which renders the radio frequency tag 1 inoperative, and therefore undetectable. A radio frequency tag 1 is only considered destroyed if at least part of the radio frequency tag 1 is destroyed. For example, the radiofrequency tag 1 is considered destroyed if the electronic chip 11 is destroyed, that is to say if it is no longer functional, for example by having suffered material damage. The radiofrequency tag is also considered destroyed if the antenna 12 is destroyed, that is to say if it is no longer functional, for example by having suffered material damage. The radiofrequency tag is also considered destroyed if the antenna 12 and the electronic chip are no longer electrically connected, that is to say if all the links 13 connecting the antenna 12 and the electronic chip 11 are broken, for example having suffered material damage.

The term “reliable” means the fact that the manual destruction means makes it possible, by using it, to destroy the radiofrequency tag 1 in at least 90% of the uses, preferentially in at least 95% of the uses, more preferentially in at least 99% of uses, ideally in 100% of uses.

The destruction means according to the invention can allow manual destruction, that is to say destruction of the radiofrequency tag 1 resulting from the use of the destruction means by an operator by manual action. A manual action can be the action of pulling on a part, tearing for example by performing a shear, tearing, cutting, taking off, or any other action that the operator can physically perform. There is no deviation from the present invention when the destruction is carried out remotely, for example by pressing a button triggering the destruction of the radiofrequency tag 1. Alternatively, the means of destruction according to the invention can allow automatic destruction.

In order to ensure the destruction of the radiofrequency tag 1, the support 19 of the radiofrequency tag 1 is preferably made of paper material, although the support 19 can be made of any other easily shearable material. Still to ensure the destruction of the radiofrequency tag 1, the support 19 of the radiofrequency tag 1 is preferably thin, for example less than 2 millimeters thick. The support 19 can also be thicker than 2 millimeters, as long as it remains shearable using the destruction means of the present invention.

The means of destruction can be of different types. In the remainder of the description, two types of means for destroying the radio frequency tag 1 will be presented in a non-limiting manner, which form two embodiments of the invention.

In a first embodiment, the means of destruction can be a part secured to the radiofrequency tag 1, for example by gluing, by assembly and which, by its use, has a mechanical effect allowing the destruction of the radiofrequency tag 1 .

The first embodiment of the radiofrequency tag 1 according to the invention is a radiofrequency tag 1 comprising a means of destruction in which the means of destruction is a coin. Figures 3 to 7 show variants of the radio frequency tag 1 according to this first embodiment, each variant having a different part.

As indicated previously, the shows a variant of the first embodiment in which the means of destruction is a wire 14. This variant to the first embodiment is the preferred variant insofar as this variant is the least complex and the least expensive to implement.

Wire 14 is accessible at at least one end. In the example represented in FIG. 3, the wire 14 comprises two ends that are manually accessible outside of the radiofrequency tag 1. One end is said to be “manually accessible outside of the radiofrequency tag 1” when it is possible to enter the hand the end of the piece. For one end to be manually accessible outside the radio frequency tag 1, the part can be assembled under the radio frequency tag 1 and have one end that protrudes outside the support 19 of the radio frequency tag 1.

The wire 14 according to the invention is a quick and reliable means of manual destruction in that it allows, by pulling on it, to shear the radiofrequency tag 1 and in particular its support 19 and thus destroy the electronic chip 11. The shear is shown in dotted lines at the . As a result of a force exerted on the wire 14, the support 19 tears along the dotted line shown in Figure 3, or along any path predetermined by the placement of the wire 14, the antenna 19 is damaged and the electronic chip 11 is destroyed. Reference may be made interchangeably to “trajectory” or to “zone” to mention the dotted line represented in [FIG. 4a] that follows the cutting when the wire 14 is pulled. Thus, the positioning of the wire 14 makes it possible to define a predetermined cut zone, the zone comprising at least a part of the electronic chip 11 or comprising at least one link 13 connecting the electronic chip 11 and the antenna 12 in order to cut at least one link 13. In a variant, the predetermined cut-off zone comprises each link 13 connecting the electronic chip 11 and the antenna 12 in order to cut each link 13.

shows a schematic representation of a radiofrequency tag 1 comprising a wire, the radiofrequency tag 1 being mounted on an object 2. The object 2 can for example be a mechanical part to be assembled on an engine, or any other object to be identified by using the radio frequency tag.

Preferably, when the destruction means is a wire 14, the wire 14 is placed under the radio frequency tag 1 as shown in . First of all, this makes it possible to use off-the-shelf radiofrequency tags 1 and thus to reduce costs. Indeed, the radio frequency tag 1 does not have to be modified or adapted, it suffices to assemble it with the wire 14, for example by gluing the wire 14 to the radio frequency tag 1 or by joining them according to any known method. , then to assemble the radiofrequency tag 1 comprising the wire 14 to the object 2 to be identified, the wire 14 being sandwiched between the object 2 and the radiofrequency tag 1. Thus, the installation is easy and quick , and the radio frequency tag 1 can be destroyed manually quickly and reliably by simply pulling on one end of the wire 14.

The wire 14 can be made of a metal, polymer, ceramic or any other material allowing the shearing of the support 19 of the radiofrequency tag 1 and the destruction of the electronic chip 11. Thus, the wire 14 can be made of nylon, steel, polyamide, polyester, polypropylene, the list of these materials not being exhaustive. Wire 14 can be twisted for added strength. The wire 14 must be strong and strong enough to cause the shearing of the support 19 of the radiofrequency tag 1 and the destruction of the electronic chip 11.

In addition, in a variant, the wire 14 makes it possible, by pulling on it, to shear the radiofrequency tag 1 and to separate the radiofrequency tag 1 from the object 2. This is allowed for example when the wire 14 connects mechanically the object 2 to the radiofrequency tag 1. The wire 14 then has the double function of connecting the radiofrequency tag 1 to the object 2 and makes it possible to destroy the radiofrequency tag 1 when the tag is physically separated radiofrequency 1 from object 2 using wire 14. For example, when wire 14 is taken from object 2 as at the , passing under the radiofrequency tag 1 and being held to the radiofrequency tag 1 by a support 3, for example made of paper, cardboard, plastic or any other suitable material, the wire 14 allows, when pulls on it and/or when pulling on the support 3, to destroy the radiofrequency tag 1 and to release the wire 14, making it possible to separate the tag 1 from the object 2. This embodiment makes it possible to identify an object 2 with certainty, and visually and by radiofrequency thanks to the radiofrequency tag 1, on which identification information can be written. The radiofrequency tag 1 and its support 3 are secured to the object 2 by the wire 14. When the wire 14 and/or the support 3 is pulled, the label 1 as well as its support 3 are detached from the object 2, making it possible to no longer identify the object 2 either visually or by radiofrequency, the radiofrequency tag 1 then being destroyed.

THE , [Fig. 4a] and [Fig. 4b] being exemplary embodiments of the variant of the first embodiment of the invention where the means of destruction is a wire 14, the cut-off zone may be different from the dotted cut-off zone shown in [Fig. 3]. The cut zone when the means of destruction is a wire 14 can be any zone allowing the destruction of the electronic chip 11.

The present invention also covers any other positioning of the wire 14 allowing quick and reliable manual destruction of the radiofrequency tag 1. For example, instead of being sandwiched between the object 2 and the radiofrequency tag 1, the wire can be stuck on the radio frequency tag, and tear part of the support 19 of the radio frequency tag 1 as well as destroy the electronic chip 11 when an operator pulls on the wire 14. It is important in this case that the wire 14 n does not interact electrically with the antenna 12 or with the electronic chip 11. In general, it is important that the wire 14 does not alter the proper functioning of the radiofrequency tag 1 as long as an operator has not on wire 14.

shows a schematic representation of a radio frequency tag according to the invention comprising a strip of rigid or semi-rigid material.

There thus shows another variant of the first embodiment in which the destruction means is a strip 15 of rigid or semi-rigid material.

For example, the strip 15 can be made of a rigid or semi-rigid material, of the metal, polymer, ceramic type or any other material allowing the shearing of the support 19 of the radiofrequency tag 1. Thus, the strip 15 can be made of nylon, steel, polyamide, polyester, or polypropylene, the list of these materials is not exhaustive. The band 15 must be strong and solid enough to carry out the shearing of the support 19 of the radiofrequency tag 1.

The band 15 can achieve a wider shear than the wire 14, for example as shown in dotted lines at the . Thus, the band 15 can be used to destroy the radiofrequency tag by destroying at least a part of at least one electronic link 13 connecting the antenna 12 and the electronic chip 11 so that the at least one electronic link 13 does not connect plus the antenna 12 and the electronic chip 11. In a variant, the band 15 destroys at least a part of each electronic link 13 connecting the antenna 12 and the electronic chip 11 so that each electronic link 13 no longer connects the antenna 12 and the electronic chip 11. This variant is shown in [Fig. 5]. The strip 15 can also make it possible to destroy the electronic chip 11. The positioning of the strip 15 makes it possible to define a predetermined cutoff zone, in dotted lines in [FIG. 5], the zone passing at least through a breaking point allowing the destruction of the electronic chip 11 or passing at least through at least one link 13 connecting the electronic chip 11 and the antenna 12 in order to cut at least the link 13, this second option being shown in [Fig. 5].

The material is also chosen so that the band 15 does not affect the proper functioning of the radiofrequency tag 1 until an operator has pulled on the band 15.

As for wire 14, strip 15 can be placed as in the sandwiched between the radiofrequency tag 1 and the object 2 in order to have an easy, fast and reliable installation, or it can be placed according to any other position allowing a quick and reliable manual destruction of the radiofrequency tag 1.

In the first embodiment, the piece forming the means of destruction can also be a hook (not shown), with one end allowing it to be grasped and to exert a shear in the same way as the wire 14 and the strip 15. The part can also be of the Tircel® tear strip type, involving a particular manufacture of the radiofrequency tags 1, or any part allowing the destruction of the radiofrequency tag 1 within the meaning of the present invention.

In a second embodiment, the destruction means can also be a guide for breaking the radiofrequency tag 1, for example one or more pre-cuts, and which allows the destruction of the radiofrequency tag 1. An advantage of a guide for breaking the radiofrequency tag 1 in the form, for example, of a pre-cut is that it makes it possible to ensure reliability of the destruction of the radiofrequency tag 1 by ensuring that the shearing will follow one or more trajectories on which find the component(s) to be destroyed.

shows a schematic representation of a radio frequency tag according to the invention comprising a V-shaped cutout.

There thus shows a variant of the second embodiment in which the destruction means is a V-shaped cutout.

The radio frequency label 1 represents the comprises a cutout 17 in the shape of a "V", the cutout 17 being made inwards, that is to say that the tip of the "V" points towards the center of the radio frequency tag 1. does not deviate from the invention when a cutout 17 is made so as to form a "V" outwards, for example to form a pull tab.

The point of the "V" of the cutout 17 makes it possible to define a starting point for shearing of the radio frequency tag 1. The V-shaped cutout 17 is a means of destruction because the cutout 17 allows an operator to destroy the radio frequency tag 1 manually quickly and reliably by grasping a part of the radio frequency tag 1 on one side of the V-shaped cutout 17, for example the left part, by grasping the other part of the radio frequency tag 1 on the other side of the V-shaped cutout 17, for example the right part, and by pulling in two opposite directions, for example the left part forwards and the right part backwards, so as to tear the radiofrequency tag starting from the V-shaped cutout 17.

The V-shaped cutout 17 is preferably placed on an edge of the radiofrequency tag 1, for example the upper edge as shown in .

The V-shaped cutout 17 is preferably placed at the same level as the electronic chip 11 on the edge of the radio frequency tag 1 as shown in , so that, during cutting, the operator destroys the electronic chip 11. The positioning of the V-shaped cutout 17 makes it possible to define a predetermined cutting path, in dotted lines in [Fig. 6], the trajectory passing at least through a breaking point allowing the destruction of the electronic chip 11 or passing through at least one link 13 connecting the electronic chip 11 and the antenna 12 in order to cut at least one link 13. Preferably, the predetermined cutting path passes through each link 13 connecting the electronic chip 11 and the antenna 12 in order to cut each link 13.

shows a schematic representation of a radiofrequency tag according to the invention comprising a V-shaped cutout and a longitudinal precut over the entire length of the radiofrequency tag.

There thus shows another variant of the second embodiment in which the destruction means is a combination of a V-shaped pre-cut and a longitudinal pre-cut over the entire length of the radiofrequency tag 1.

The radio frequency tag 1 shown in includes the V-shaped cutout 17 of [Fig. 6] discussed previously and a longitudinal pre-cut 16 over an entire length of the radiofrequency tag 1.

The longitudinal precut 16 makes it possible to improve the reliability of the variant of the second embodiment comprising only a V-shaped cutout 17. Thanks to the longitudinal precut, the destruction of the electronic chip 11 is ensured by guiding shearing along a chosen trajectory formed by the longitudinal precut 16. The longitudinal precut 16 can be made in the support 19 of the radiofrequency tag 1 or in the radiofrequency tag 1 when the antenna 12 is printed in conductive ink. The longitudinal cutout 16 is made in such a way as not to affect the proper functioning of the radiofrequency tag 1, and may not be made over the entire length of the radiofrequency tag 1. For example, the longitudinal cutout 16 may stop before reaching the electronic chip 11.

Preferably, however, the longitudinal pre-cut 16 is made over an entire length of the radiofrequency tag 1 in order to guide the shearing. The positioning of the longitudinal precut 16 makes it possible to define a predetermined cutting trajectory, the trajectory passing at least through a breaking point allowing the destruction of the electronic chip 11 or passing through at least one link 13 connecting the electronic chip 11 and the antenna 12 in order to sever at least one link 13. Preferably, the predetermined cutting path passes through each link 13 connecting the electronic chip 11 and the antenna 12 in order to sever each link 13.

For example, as shown in , the pre-cut is performed vertically.

In addition, the longitudinal precut 16 preferably starts at the level of the tip of the "V" of the V-shaped cutout 17, so as to produce a guide for breaking the radiofrequency tag 1.

Although not described, the invention also covers the variant of the second embodiment in which only a longitudinal pre-cut 16 is present.

shows a schematic representation of a radio frequency tag according to the invention comprising two V-shaped pre-cuts and two longitudinal pre-cuts over at least an entire length of the radio frequency tag.

There thus shows a variant of the second embodiment in which the destruction means is a combination of two V-shaped pre-cuts and two longitudinal pre-cuts over at least an entire length of the radiofrequency tag 1.

This variant of the second embodiment makes it possible to destroy the radiofrequency tag 1 by breaking the links 13 electrically connecting the antenna 12 and the electronic chip 11. Preferably, and as shown in , the two V-shaped cutouts 17 make it possible to form a tab. Thus, an operator can perform a manual action making it possible to quickly and reliably destroy the radiofrequency tag 1 by pulling on the tab created by the presence of the two V-shaped cutouts 17.

The radiofrequency tag 1 can also comprise two parallel longitudinal pre-cuts 16, each starting at the level of a tip of a V-shaped cutout 17 as shown in . As indicated previously, each of these two longitudinal pre-cuts 16 make it possible to improve the reliability of the destruction by ensuring the trajectory that the shearing will follow. Thus, in [Fig. 8] it is ensured that the shearing will follow a trajectory which will indeed break each of the two links 13 electrically connecting the antenna 12 and the electronic chip 11.

The second embodiment of the invention also relates to the presence of two longitudinal pre-cuts 16 alone in a radiofrequency tag 1, or of more than two longitudinal pre-cuts 16 alone or in combination with one or more V-shaped cutouts. embodiment of the invention may also relate to the presence of more than two single V-shaped cutouts in a radiofrequency tag 1. In addition, a break guide according to the invention may also be an extrusion of material (not shown). According to this variant, material is extruded beforehand at the zone to be destroyed, so as to weaken this zone. The operator then has the possibility of bending then breaking the label 1 with its support 19 via this singularity, or even tearing the label 1 at the level of this material extrusion.

All the variants of the second embodiment allow the support 19 of the radiofrequency tag 1 to be in a shearable material less easily than paper, such as a polymer. Indeed, the pre-cuts greatly facilitate shearing and make possible a greater choice of materials and/or thicknesses for the support 19.

In a third embodiment of the invention, the radio frequency tag 1 comprises two means of destruction of different types: a part and a break guide. This third embodiment thus comprises any combination comprising at least one part presented previously in the first embodiment of the invention and at least one breaking guide previously presented in the second embodiment of the invention.

Figures 9 to 11 presented below each present at least one of these possible combinations.

There shows a schematic representation of a radio frequency tag according to the invention comprising a wire and a longitudinal pre-cut.

This combination of a wire 14 and a longitudinal pre-cut 16 included in the radiofrequency tag 1 facilitates the destruction of the radiofrequency tag 1 by ensuring that the support 19 and/or the radiofrequency tag 1 opposes less resistance force to the wire 14 when the operator pulls on the wire 14. The longitudinal precut 16 allows shearing requiring less effort from the operator carrying out the manual action and always provides the improvement in reliability that it already offered in the second embodiment by ensuring that the shear follows a predefined trajectory.

All the variants of the third embodiment allow the support 19 of the radio frequency tag 1 to be in a shearable material that is less easily than the materials that can be used for the support 19 in the first and second embodiments. Indeed, the pre-cuts greatly facilitate the shearing and the parts improve the force applicable by the operator to perform this shearing and make possible an even greater choice of materials and/or thicknesses for the support 19.

There shows a schematic representation of a radio frequency tag according to the invention comprising a wire and a V-shaped cutout.

This combination of a wire 14 and a V-shaped cutout 17 included in the radiofrequency tag 1 facilitates the destruction of the radiofrequency tag 1 by ensuring that the support 19 and/or the radiofrequency tag 1 opposes less resistance force to the wire 14 when the operator pulls on the wire 14. This force, linked to the resistance of the border before it begins to tear, is much less important when a cutout 17 in V shape is made in the edging. The V-shaped cutout 17 allows shearing requiring less effort from the operator performing the manual action. In this variant, the cutout 17 is placed at one of the manually accessible ends of the wire 14 so that, when an operator pulls the wire 14, the end of the wire enters the cavity created by the V-shape of the cutout 17 then begins to shear the edge of the radio frequency tag 1 at the point of the V of the V-shaped cutout 17.

There shows a schematic representation of a radio frequency tag according to the invention comprising a wire, a longitudinal pre-cut and a V-shaped cut.

The variant shown in is the preferred implementation of the invention because it is the most reliable and the fastest, the longitudinal precut 16 and the V-shaped cutout 17 making it possible to ensure the reliability of the destruction of the electronic chip 11 and the wire 14 to ensure the speed of execution of the manual action by the operator thus allowing rapid and reliable manual destruction of the radiofrequency tag 1.

In the variant shown in , the wire 14 and the longitudinal precut 16 are aligned with each other and start at the level of the point of the "V" of the cutout 17 in the shape of a V.

In each embodiment where it is used, the cutout 17 may also not be V-shaped but be a simple longitudinal notch made in the direction of the center of the radio frequency tag 1 or in any direction making it possible to facilitate the shearing of the radio frequency tag 1.

The invention also relates to a method of manufacturing (not shown) a destructible radiofrequency tag 1, the method comprising at least one step of assembling a radiofrequency tag with a part so that the part comprises at least one accessible end manually outside the label. As mentioned earlier, assembly can be gluing, sewing, or any other process to assemble the radio frequency tag with a part.

The invention also relates to a manufacturing method (not shown) of a destructible radiofrequency tag 1, characterized in that it comprises at least one step of creating a break guide in a radiofrequency tag 1. The step of creating of a break guide may comprise the pre-cutting of a radio frequency tag so as not to alter its proper functioning while creating at least one break guide of the radio frequency tag. This pre-cut can be made by a micro-perforator, an extruder or any pre-cut machine. The step of creating a break guide can, in a variant, comprise a cutout in an edge of the radiofrequency tag 1, for example a cutout 17 in the shape of a V or any notch making it possible to facilitate the initiation of the shearing of the radio frequency tag 1.

The invention also relates to a method for manufacturing a destructible radiofrequency tag characterized in that it comprises at least the two steps presented in the preceding paragraphs of creating a break guide in a radiofrequency tag and assembling the radio frequency tag with a patch such that the patch includes at least one manually accessible end outside of the radio frequency tag.

Claims (12)

Destructible radio frequency tag (1) comprising at least one electronic chip (11) and a radio frequency antenna (12) connected by at least one electronic link (13), said radio frequency tag (1) being characterized in that it comprises at least one means manual destruction(14,15,16,17):

• of the electronic chip (11) of the radiofrequency tag (1) and/or
• at least a part of at least one electronic link (13) connecting the radiofrequency antenna (12) and the electronic chip (11) so that the at least one electronic link (13) no longer connects the radiofrequency antenna (12) and the electronic chip (11) and that the radiofrequency tag (1) can no longer emit.

Destructible radiofrequency tag (1) according to the preceding claim, characterized in that the means of manual destruction (14,15,16,17) of at least a part of at least one electronic link (13) connecting the radiofrequency antenna ( 12) and the electronic chip (11) is configured to destroy at least a part of each electronic link (13) connecting the radiofrequency antenna (12) and the electronic chip (11) so that each electronic link (13) does not connect plus the radiofrequency antenna (12) and the electronic chip (11). Destructible radiofrequency tag (1) according to any one of the preceding claims, characterized in that it comprises a support (19) made of paper material or of polymer material. Destructible radiofrequency tag (1) according to any one of the preceding claims, characterized in that the manual destruction means (14,15,16,17) is a part (14,15) comprising at least one end which is manually accessible outside the tag (1), the part (14,15) allowing destruction of at least one zone of the radiofrequency tag (1), the destruction zone comprising:

• at least a part of the electronic chip (11) and/or
• at least a part of at least one electronic link (13) connecting the radio frequency antenna (12) and the electronic chip (11) so that the at least one electronic link (13) no longer connects the radio frequency antenna (12 ) and the electronic chip (11) and that the radio frequency tag (1) can no longer transmit.

Destructible radiofrequency tag (1) according to the preceding claim, characterized in that the part (14, 15) is chosen from at least one wire (14), at least one hook, at least one strip (15) of semi-rigid material or rigid. Destructible radiofrequency tag (1) according to any one of Claims 1 to 3, characterized in that the manual destruction means (14,15,16,17) is at least one guide (16,17), the guide (16, 17) allowing destruction along at least one trajectory of the radio frequency tag (1), the destruction trajectory passing through:

• at least a part of the electronic chip (11) and/or
• at least a part of at least one electronic link (13) connecting the radio frequency antenna (12) and the electronic chip (11) so that the at least one electronic link (13) no longer connects the radio frequency antenna (12 ) and the electronic chip (11) and that the radio frequency tag (1) can no longer emit.

Destructible radiofrequency tag (1) according to the preceding claim, characterized in that the at least one guide (16,17) is chosen from at least one V-shaped cutout at the level of an edge of the radiofrequency tag (17), at least one tab secured to the radiofrequency tag, at least one longitudinal pre-cut (16) or at least one extrusion of material. Destructible radiofrequency tag (1) according to any one of Claims 1 to 2, characterized in that it comprises at least one first manual destruction means (14,15,16,17) and at least one second manual destruction means ( 14,15,16,17):

• the first manual destruction means (14,15,16,17) of the radiofrequency tag (1) being at least one part (14,15) comprising at least one end manually accessible outside the tag (1), the part (14, 15) allowing destruction of at least one zone of the radio frequency tag (1), the destruction zone comprising at least a part of the electronic chip (11) and/or at least a part of at least one electronic link (13) connecting the radio frequency antenna (12) and the electronic chip (11) so that the at least one electronic link (13) no longer connects the radio frequency antenna (12) and the electronic chip ( 11) and the radiofrequency tag (1) can no longer transmit, the part (14,15) being chosen from among a wire (14), a hook, a strip (15) of semi-rigid or rigid material,
• the second manual destruction means (14,15,16,17) of the radiofrequency tag (1) being at least one guide (16,17), the guide (16,17) allowing destruction along at least one trajectory of the radiofrequency tag (1), the destruction trajectory passing through at least a part of the electronic chip (11) and/or at least a part of at least one electronic link (13) connecting the radiofrequency antenna (12) and the electronic chip (11) so that the at least one electronic link (13) no longer connects the radiofrequency antenna (12) and the electronic chip (11) and and the radiofrequency tag (1) can no longer transmit , the guide (16,17) being chosen from at least one V-shaped cutout (17), at least one notch, at least one longitudinal precut (16), at least one material extrusion.

System comprising at least one destructible radiofrequency tag (1) according to any one of claims 4, 5 or 8, at least one support (3) and at least one object (2), the radiofrequency tag (1) being secured to the support (3) and being connected to the object (2) by the part (14,15) included in the radiofrequency tag (1), the part (14,15) being held to the radiofrequency tag (1) by the support (3). Method of manufacturing a destructible radiofrequency tag (1) according to any one of Claims 4 or 5, characterized in that it comprises at least one step of assembling a radiofrequency tag (1) with a part (14, 15) so that the part (14,15) includes at least one manually accessible end outside the radiofrequency tag (1). Method of manufacturing a destructible radiofrequency tag (1) according to any one of claims 6 or 7, characterized in that it comprises at least one step of creating a break guide (16,17) in a radiofrequency tag (1). Method of manufacturing a destructible radiofrequency tag (1) according to claim 8, characterized in that it comprises at least:

• a step of creating a break guide (16,17) in a radiofrequency tag (1) and
• a step of assembling the radiofrequency tag (1) with a part (14,15) so that the part (14,15) includes at least one manually accessible end outside the radiofrequency tag (1).