WO2001069288A1 - Method for detecting and identifying an object among a plurality of objects, and device therefor - Google Patents
Method for detecting and identifying an object among a plurality of objects, and device therefor Download PDFInfo
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- WO2001069288A1 WO2001069288A1 PCT/FR2001/000765 FR0100765W WO0169288A1 WO 2001069288 A1 WO2001069288 A1 WO 2001069288A1 FR 0100765 W FR0100765 W FR 0100765W WO 0169288 A1 WO0169288 A1 WO 0169288A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/101—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil
- G01V3/102—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil by measuring amplitude
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
Definitions
- the invention is in the field of coding and identifying objects, and it relates to a method for locating an object identified from among a plurality of objects, as well as a device for implementing this method.
- optoelectronics for example.
- Document US 5965214 describes a bar code magnetizable by regions by means of a permanent magnet.
- a problem to be solved in the field of coding lies in the reliability of the code assigned to the object to be identified, reliability notably dependent on the inviolable and unalterable nature of the code or of its support, as well as in the difficulty for a person not authorized to reproduce it.
- WO 89/06810 describes a ferromagnetic substance detector used to locate an object.
- the aim of the present invention is to propose a method for coding an object with a view to its recognition among a plurality of objects, as well as a device for its implementation, the reliability of which results in particular from the implementation place on the object of a code difficult to alter or copy by an unauthorized person.
- the inventive step of the present invention consisted in assigning to an object to identify a code materialized by at least one metallic mass based on at least one non-magnetic alloy, and in recognizing said code by subjecting it to a magnetic field which s 'is found to be altered, and whose modified characteristics are measured, then compared to reference values previously stored by memory means.
- the code can be reported either directly on the object, or via a support, or a label.
- the material of the object represents the code.
- the code is composed of several elementary metallic masses of non-magnetic alloy, in order to multiply the possible combinations of the code, and / or in order to assign to each of said metallic masses a criterion of respective identification of the object.
- the processing of information relating to the modification of the magnetic field by each of the metallic masses is carried out for example, according to this specific embodiment:
- FIG. 1 and 2 are diagrams which successively illustrate the different stages of a method according to a preferred form of the invention, and its means of implementation
- Fig. 3 is a diagram illustrating specific means of analysis and processing the measured values of the changes in the magnetic field, of a device for implementing the method illustrated in the preceding figures
- FIGS. 4 to 8 are illustrations of different applications of a method of the invention.
- a method of the invention for the detection and identification of an object among a plurality of objects is of the kind of method consisting successively in assigning a code to the object, in recognizing said code by cooperating reading means, and comparing the values relating to the code with the values of a previously stored reference code.
- the method of the invention generally comprises the following successive steps, consisting in: - assigning to the object 4 at least one metallic mass 6.8 or 10 based on at least one non-magnetic alloy constituting the code to be identified, said code being determined at the time of manufacture of the alloy, - subject the object 4 carrying the code 6,8,10 to a magnetic field 18 to modify its characteristics. to measure said modifications of the characteristics of the magnetic field 18.
- said magnetic field 18 is a variable magnetic field with high impedance induced by a loop 20 to at least one turn supplied 22 with alternating current G.
- the step of measuring the differences between the correlatively measured characteristics of one and the other of the induced current G and of the altered current F preferably consists in comparing one of the currents, the at least any of their amplitude (C), their phasing
- f (C, D) is a mathematical relation involving phase and amplitude.
- g (E) is a mathematical relation involving the different components of the spectrum.
- C0, C0 / D0, D0 and E0 can either be memorized in the workshop, or and preferably be memorized extemporaneously with a desired identification operation from a reference code, the characteristics of which are measured and memorized by switching to across the magnetic field 20 or equivalent through a similar magnetic field specifically assigned to memory means 24.
- a device for implementing the method of the invention comprises:
- a code formed of at least one metallic mass 6,8,10 based on a non-magnetic alloy, such as copper, brass, stainless steel, aluminum, zinc, or any other non-ferrous metal b) means 20 , 22 inductors of an initially induced magnetic field, c) means 34 for measuring the modified characteristics of the magnetic field 18 by the code 6,8,10, d) electronic means 26,28,30,32 for analysis and for processing the values A and B from the measurement means, for the comparison between the characteristics of the magnetic field modified by the code 6,8,10, and the characteristics of the magnetic field initially induced, and e) the memory means 24 for prior storage of the reference values C0, C0 / D0, D0 and E0 corresponding to a respective code and their comparison with the analyzed and processed values C, C / D, D and E relating to the modification of the magnetic field 18.
- a non-magnetic alloy such as copper, brass, stainless steel, aluminum, zinc, or any other non-ferrous metal
- the device of the invention furthermore and preferably includes the following arrangements, taken alone or in combination: a) the inductor means are constituted by means 22 of an alternating current, supplying energy to a loop 20 with at least one turn generator of the magnetic field 18.
- the measuring means 34 are means for measuring the characteristics of the alternating current, and in particular means for measurement of any one at least of its frequency, its phasing, its amplitude and its spectrum, on either side of a resistor 36 interposed between the means 22 generating the alternating current and the loop 20, for the measurement respectively of the induced current G and of the altered current F.
- the electronic analysis and data processing means are means of comparison between the values of the measurements B of the characteristics of the induced current G and of the measurements A of the characteristics of the altered current F.
- the memory means additionally comprise, alone or in combination, reading means and input means such as a keyboard 38 or a reader 40 of memory cards 42, associated with means 24 for memorizing, C0 values , C0 / D0, D0 and E0 of a reference code.
- analysis means comprise n values of spectrum memory S1, S2, etc. Sn, memorized by means of memory means 24 and respectively corresponding to the values of a code to be identified.
- the spectrum memory values S1, S2, Sn are successively compared, by means of the analysis and processing means 30, with the values of the measured spectrum of the altered current F.
- the device of the invention incidentally includes means 44 for measuring the stability of the spectrum of the inducing current of the magnetic field 18, to control the reliability of the induced current G, and therefore modifications of the characteristics of the magnetic field 18.
- a garment 48 is equipped with a support 4, or label, on which has been reported a metal code 10 of the invention.
- the means 20, 22 inducing alternating current, as well as the processing and analysis means 26, 28, 30, 32 and the memory means 24, are grouped in a mobile station 50 for identifying the code, which includes a read head 52 transportable and manipulated manually by an operator, said read head 52 being carrier of the loop 20 and being connected to the other means 26,28,30,32 and 24, themselves grouped in a calculating station 56 , via a link 54, wired or remote information transmission in particular.
- the measured values can be communicated remotely to a computation station 56 fixed by means of a link 54 for remote information communication of the hertzian or infrared type.
- the code 10 is incorporated into the object to be identified.
- the object is a piece of fabric 55, for example a towel or cloth, and the code is composed of a non-magnetic alloy incorporated into the screen of the fabric or deposited after the fabric piece 55 has been made.
- This application allows for example to sort between different pieces of fabrics of different nature, by view of their industrial cleaning according to the cleaning processes specific to these fabrics.
- the object to be identified consists of a key 58, in particular made from a combination of different non-magnetic alloys constituting the code 10.
- This application makes it possible to substitute, or to complete, the coding mechanical 60 of the key 58 by the coding means 10 of the invention, to allow authorized access to a room, or even to trigger an alarm 62 in the event of non-recognition of the code.
- the aforementioned identification station 50 is not mobile, but fixed.
- a plurality of containers 64,66,68, bottles in particular, are equipped with a respective and different non-magnetic metal code 10.
- the codes are deposited on a support attached to the containers, such as on their lid or stopper 70, or even on their label 72.
- the method of the invention is advantageously used for accounting for available stocks , in store shelves or in the beverage reserves of hotel rooms.
- the containers are identified for example by circulating them along a chute 80, which supports means generating the magnetic field 18, comparable to the loop 20 and to the means 22 generating the inductive alternating current, associated with sensors 78 connected to a calculating station 56.
- a non-magnetic metallic code 10 is incorporated in the sole of a shoe 74, especially for children, so as to detect a dangerous zone in which a fixed identification station 50 has been previously placed, the loop 20 surrounds the perimeter of said area, for example being incorporated in a floor mat 76. It will be understood that beyond this specific example, the method of the invention, and the means used, can be applied devices to prohibit the crossing of an area boundary, for the keeping of animals for example.
Abstract
The invention concerns a method for identifying an object among a plurality of objects, which consists in: assigning to the object (4) a metal mass (6, 8, 10) based on at least a non-magnetic alloy forming the code to be identified, said code being determined at the time the alloy is being produced; subjecting the object (4) bearing the code to a magnetic field (18) to modify the characteristics thereof; measuring said modifications of characteristics of magnetic field (18); and comparing the measurements to be identified with reference values previously stored and related to a reference code.
Description
Procédé de détection et d'identification d'un objet parmi une pluralité d'objets, et dispositif pour sa mise en œuvre. Method for detecting and identifying an object among a plurality of objects, and device for its implementation.
Domaine technique de l'inventionTechnical field of the invention
L'invention est du domaine du codage et de l'identification d'objets, et elle a pour objet une méthode pour le repérage d'un objet identifié parmi une pluralité d'objets, ainsi qu'un dispositif pour la mise en œuvre de cette méthode.The invention is in the field of coding and identifying objects, and it relates to a method for locating an object identified from among a plurality of objects, as well as a device for implementing this method.
Etat de la techniqueState of the art
On connaît une méthode pour identifier un objet, en vue de sa reconnaissance parmi une pluralité, consistant dans sa généralité à lui affecter un code reconnaissable par des moyens de lecture associés à des moyens de mémoire du type code à barres reconnaissable par des moyens de lecture optoélectroniques par exemple. Le document US 5965214 décrit un code barre magnétisable par régions au moyen d'un aimant permanent.A method is known for identifying an object, with a view to recognizing it among a plurality, consisting in its generality of assigning to it a code recognizable by reading means associated with memory means of the bar code type recognizable by reading means. optoelectronics for example. Document US 5965214 describes a bar code magnetizable by regions by means of a permanent magnet.
Un problème à résoudre dans le domaine du codage réside dans la fiabilité du code affecté à l'objet à identifier, fiabilité notamment dépendante du caractère inviolable et inaltérable du code ou de
son support, ainsi que dans la difficulté pour une personne non autorisée à le reproduire.A problem to be solved in the field of coding lies in the reliability of the code assigned to the object to be identified, reliability notably dependent on the inviolable and unalterable nature of the code or of its support, as well as in the difficulty for a person not authorized to reproduce it.
On connaît par ailleurs dans le domaine du tri d'objets divers en vrac, des dispositifs pour détecter et isoler des emballages métalliques à partir de la modification des caractéristiques d'un champ magnétique qu'ils sont conduits à traverser. On pourra par exemple se reporter au brevet EP 0862067.Also known in the field of sorting various loose objects, devices for detecting and isolating metal packaging from the modification of the characteristics of a magnetic field that they are led to pass through. One can for example refer to patent EP 0862067.
Le document US 5430278 concerne un détecteur de code barre faisant usage de couches de différentes largeurs placés sur un support avec des intervalles de séparation.Document US 5430278 relates to a bar code detector making use of layers of different widths placed on a support with separation intervals.
Le document WO 89/06810 décrit un détecteur à substance ferromagnétique servant à localiser un objet.WO 89/06810 describes a ferromagnetic substance detector used to locate an object.
Le document WO 99/67099 mentionne un film ayant une couche d'alliage magnétique amorphe déposée par projection.Document WO 99/67099 mentions a film having a layer of amorphous magnetic alloy deposited by projection.
Ces dispositifs de détection connus permettent de localiser la présence d'un objet, mais ne sont pas agencés pour la reconnaissance de la matière.These known detection devices make it possible to locate the presence of an object, but are not arranged for the recognition of the material.
Objet de l'inventionSubject of the invention
Le but de la présente invention est de proposer une méthode pour le codage d'un objet en vue de sa reconnaissance parmi une pluralité d'objets, ainsi qu'un dispositif pour sa mise en œuvre, dont la fiabilité résulte notamment de la mise en place sur l'objet d'un code difficilement altérable ou copiable par une personne non autorisée.
La démarche inventive de la présente invention a consisté à affecter à un objet à identifier un code matérialisé par au moins une masse métallique à base d'au moins un alliage amagnétique, et à reconnaître le dit code en le soumettant à un champ magnétique qui s'en trouve altéré, et dont les caractéristiques modifiées sont mesurées, puis comparées à des valeurs de référence préalablement mémorisées par des moyens de mémoire.The aim of the present invention is to propose a method for coding an object with a view to its recognition among a plurality of objects, as well as a device for its implementation, the reliability of which results in particular from the implementation place on the object of a code difficult to alter or copy by an unauthorized person. The inventive step of the present invention consisted in assigning to an object to identify a code materialized by at least one metallic mass based on at least one non-magnetic alloy, and in recognizing said code by subjecting it to a magnetic field which s 'is found to be altered, and whose modified characteristics are measured, then compared to reference values previously stored by memory means.
Le code peut être rapporté soit directement sur l'objet, soit par l'intermédiaire d'un support, ou d'une étiquette. La matière constitutive de l'objet représente le code.The code can be reported either directly on the object, or via a support, or a label. The material of the object represents the code.
Selon une forme spécifique de réalisation de l'invention, le code est composé de plusieurs masses métalliques élémentaires en alliage amagnétique, afin de multiplier les combinaisons possibles du code, et/ou afin d'affecter à chacune des dites masses métalliques un critère d'identification respectif de l'objet. Le traitement des informations relatives à la modification du champ magnétique par chacune des masses métalliques s'effectue par exemple, selon cette forme spécifique de réalisation:According to a specific embodiment of the invention, the code is composed of several elementary metallic masses of non-magnetic alloy, in order to multiply the possible combinations of the code, and / or in order to assign to each of said metallic masses a criterion of respective identification of the object. The processing of information relating to the modification of the magnetic field by each of the metallic masses is carried out for example, according to this specific embodiment:
- soit, dans le cas où le code est lu à un même poste de reconnaissance de l'objet, par une reconnaissance successive ou séquentielle de chaque masse métallique, et leur identification relative,- either, in the case where the code is read at the same object recognition station, by successive or sequential recognition of each metallic mass, and their relative identification,
- soit, dans le cas où la reconnaissance du code s'effectue à des postes de reconnaissance spécifiques, tels que pour sa reconnaissance en douane ou sur un lieu de transit, en magasin ou à poste d'élimination de déchets par exemple, de manière sélective par reconnaissance spécifique relative à chacun des dits postes de la masse métallique à reconnaître parmi la pluralité de masses métalliques participant du code.
Description sommaire des dessins- or, in the case where the recognition of the code is carried out at specific recognition stations, such as for its recognition at customs or at a place of transit, in a store or at a waste disposal station for example, so selective by specific recognition relating to each of said positions of the metallic mass to be recognized among the plurality of metallic masses participating in the code. Brief description of the drawings
La présente invention sera mieux comprise et des détails en relevant apparaîtront, à la description qui va en être faite de formes préférées de réalisation, en relation avec les figures des planches annexées, dans lesquelles :The present invention will be better understood and details will become apparent from the description which will be made of preferred embodiments thereof, in relation to the figures of the appended plates, in which:
Les fig.1 et 2 sont des schémas qui illustrent successivement les différentes étapes d'une méthode selon une forme préférée de l'invention, et ses moyens de mise en œuvre, la fig.3 est un schéma illustrant des moyens spécifiques d'analyse et de traitement des valeurs mesurées des modifications du champ magnétique, d'un dispositif de mise en œuvre de la méthode illustrée sur les figures précédentes, les fig.4 à 8 sont des illustrations de différentes applications d'une méthode de l'invention.Fig. 1 and 2 are diagrams which successively illustrate the different stages of a method according to a preferred form of the invention, and its means of implementation, Fig. 3 is a diagram illustrating specific means of analysis and processing the measured values of the changes in the magnetic field, of a device for implementing the method illustrated in the preceding figures, FIGS. 4 to 8 are illustrations of different applications of a method of the invention.
Description de modes de réalisation préférentielsDescription of preferred embodiments
Sur les fιg.1 et 2, une méthode de l'invention pour la détection et l'identification d'un objet parmi une pluralité d'objets, est du genre de méthode consistant successivement à affecter un code à l'objet, à reconnaître ledit code par des moyens de lecture coopérant, et à comparer les valeurs relatives au code avec les valeurs d'un code de référence préalablement mémorisées.In FIGS. 1 and 2, a method of the invention for the detection and identification of an object among a plurality of objects, is of the kind of method consisting successively in assigning a code to the object, in recognizing said code by cooperating reading means, and comparing the values relating to the code with the values of a previously stored reference code.
La méthode de l'invention comprend dans sa généralité les étapes successives suivantes, consistant: - à affecter à l'objet 4 au moins une masse métallique 6,8 ou 10 à base d'au moins un alliage amagnétique constituant le code à identifier, ledit code étant déterminé au moment de la fabrication de l'alliage,
- à soumettre l'objet 4 porteur du code 6,8,10 à un champ magnétique 18 pour en modifier les caractéristiques. à mesurer les dites modifications des caractéristiques du champ magnétique 18. Selon la méthode préférée illustrée, ledit champ magnétique 18 est un champ magnétique variable à haute impédance induit par une boucle 20 à au moins une spire alimentée 22 en courant alternatif G. Les modifications du champ magnétique 18, provoquées par courant de Foucault induit par la présence du code 6,8,10, sont évaluées à partir d'une mesure des variations C,C/D,D et E des caractéristiques du courant alternatif G, dit alors courant altéré F, comparées à des valeursThe method of the invention generally comprises the following successive steps, consisting in: - assigning to the object 4 at least one metallic mass 6.8 or 10 based on at least one non-magnetic alloy constituting the code to be identified, said code being determined at the time of manufacture of the alloy, - subject the object 4 carrying the code 6,8,10 to a magnetic field 18 to modify its characteristics. to measure said modifications of the characteristics of the magnetic field 18. According to the preferred method illustrated, said magnetic field 18 is a variable magnetic field with high impedance induced by a loop 20 to at least one turn supplied 22 with alternating current G. The modifications of the magnetic field 18, caused by eddy current induced by the presence of the code 6,8,10, are evaluated from a measurement of the variations C, C / D, D and E of the characteristics of the alternating current G, then called current altered F, compared to values
C0,C0/D0,D0 et E0 de référence relatives au code 6,8,10 à identifier. On notera que l'étape de mesure des différences entre les caractéristiques corrélativement mesurées de l'un et l'autre du courant induit G et du courant altéré F consiste de préférence à comparer de l'un à l'autre des courants, l'un quelconque au moins de leur amplitude (C), leur phasageC0, C0 / D0, D0 and E0 of reference relating to the code 6,8,10 to identify. It will be noted that the step of measuring the differences between the correlatively measured characteristics of one and the other of the induced current G and of the altered current F preferably consists in comparing one of the currents, the at least any of their amplitude (C), their phasing
(D), leur spectre (E), et ou le rapport (C/D) entre leur différence de phasage et d'amplitude.(D), their spectrum (E), and or the ratio (C / D) between their difference in phasing and amplitude.
à comparer les mesures à identifier C,C/D,D ou f(C,D) et E ou g(E), à des valeurs C0,C0/D0,D0 et E0 de référence, préalablement mémorisées et relatives à un code de référence.to compare the measurements to identify C, C / D, D or f (C, D) and E or g (E), to reference values C0, C0 / D0, D0 and E0, previously memorized and relating to a code reference.
f(C,D) est une relation mathématique impliquant la phase et l'amplitude. g(E) est une relation mathématique impliquant les différentes composantes du spectre.f (C, D) is a mathematical relation involving phase and amplitude. g (E) is a mathematical relation involving the different components of the spectrum.
On notera que les valeurs de référenceNote that the reference values
C0,C0/D0,D0 et E0 peuvent être soit mémorisées en atelier, soit et de préférence être mémorisées extemporanément à une opération d'identification souhaitée à partir d'un code de référence, dont les caractéristiques sont mesurées et mémorisées par son passage à travers le
champ magnétique 20 ou de manière équivalente à travers un champ magnétique semblable spécifiquement affecté aux moyens de mémoire 24.C0, C0 / D0, D0 and E0 can either be memorized in the workshop, or and preferably be memorized extemporaneously with a desired identification operation from a reference code, the characteristics of which are measured and memorized by switching to across the magnetic field 20 or equivalent through a similar magnetic field specifically assigned to memory means 24.
Un dispositif pour la mise en œuvre de la méthode de l'invention, comprend :A device for implementing the method of the invention comprises:
a) un code formé d'au moins une masse métallique 6,8,10 à base d'un alliage amagnétique, tel que cuivre, laiton, acier inoxydable, aluminium, zinc, ou tout autre métal non ferreux, b) des moyens 20,22 inducteurs d'un champ magnétique initialement induit, c) des moyens 34 de mesure des caractéristiques modifiées du champ magnétique 18 par le code 6,8,10, d) des moyens électroniques 26,28,30,32 d'analyse et de traitement des valeurs A et B en provenance des moyens de mesure, pour la comparaison entre les caractéristiques du champ magnétique modifié par le code 6,8,10, et les caractéristiques du champ magnétique initialement induit, et e) des moyens de mémoire 24 pour la mémorisation préalables des valeurs de référence C0,C0/D0,D0 et E0 correspondantes à un code respectif et leur comparaison avec les valeurs analysées et traitées C,C/D,D et E relatives à la modification du champ magnétique 18.a) a code formed of at least one metallic mass 6,8,10 based on a non-magnetic alloy, such as copper, brass, stainless steel, aluminum, zinc, or any other non-ferrous metal, b) means 20 , 22 inductors of an initially induced magnetic field, c) means 34 for measuring the modified characteristics of the magnetic field 18 by the code 6,8,10, d) electronic means 26,28,30,32 for analysis and for processing the values A and B from the measurement means, for the comparison between the characteristics of the magnetic field modified by the code 6,8,10, and the characteristics of the magnetic field initially induced, and e) the memory means 24 for prior storage of the reference values C0, C0 / D0, D0 and E0 corresponding to a respective code and their comparison with the analyzed and processed values C, C / D, D and E relating to the modification of the magnetic field 18.
Le dispositif de l'invention comporte par ailleurs et preferentiellement les dispositions suivantes, prises seules ou en combinaison : a) les moyens inducteurs sont constitués par des moyens générateurs 22 d'un courant alternatif, alimentant en énergie une boucle 20 à au moins une spire génératrice du champ magnétique 18.The device of the invention furthermore and preferably includes the following arrangements, taken alone or in combination: a) the inductor means are constituted by means 22 of an alternating current, supplying energy to a loop 20 with at least one turn generator of the magnetic field 18.
b) les moyens de mesure 34 sont des moyens de mesure des caractéristiques du courant alternatif, et notamment des moyens de
mesure de l'un quelconque au moins de sa fréquence, son phasage, son amplitude et de son spectre, de part et d'autre d'une résistance 36 interposée entre les moyens générateurs 22 du courant alternatif et la boucle 20, pour la mesure respectivement du courant induit G et du courant altéré F.b) the measuring means 34 are means for measuring the characteristics of the alternating current, and in particular means for measurement of any one at least of its frequency, its phasing, its amplitude and its spectrum, on either side of a resistor 36 interposed between the means 22 generating the alternating current and the loop 20, for the measurement respectively of the induced current G and of the altered current F.
c) les moyens électroniques d'analyse et de traitement de données sont des moyens de comparaison entre les valeurs des mesures B des caractéristiques du courant induit G et des mesures A des caractéristiques du courant altéré F.c) the electronic analysis and data processing means are means of comparison between the values of the measurements B of the characteristics of the induced current G and of the measurements A of the characteristics of the altered current F.
d) les moyens de mémoire comprennent accessoirement, seuls ou en combinaison, des moyens de lecture et des moyens de saisie tels qu'un clavier 38 ou un lecteur 40 de cartes à mémoire 42, associés à des moyens 24 de mémorisation, des valeurs C0,C0/D0,D0 et E0 d'un code de référence.d) the memory means additionally comprise, alone or in combination, reading means and input means such as a keyboard 38 or a reader 40 of memory cards 42, associated with means 24 for memorizing, C0 values , C0 / D0, D0 and E0 of a reference code.
Sur la fig.3, parmi les moyens d'analyse et de traitement des valeurs mesurées des modifications du champ magnétique, il est avantageusement prévu des moyens d'analyse 30 du spectre du courant altéré F. Ces moyens d'analyse comportent n valeurs de mémoire de spectre S1 , S2, etc.. Sn, mémorisées par l'intermédiaire des moyens de mémoire 24 et respectivement correspondantes aux valeurs d'un code à identifier. Les valeurs de mémoire de spectre S1 ,S2,Sn sont successivement comparées, par l'intermédiaire des moyens d'analyse et de traitement 30, aux valeurs du spectre mesuré du courant altéré F.In FIG. 3, among the means for analyzing and processing the measured values of the changes in the magnetic field, there are advantageously provided means for analyzing the spectrum of the altered current F. These analysis means comprise n values of spectrum memory S1, S2, etc. Sn, memorized by means of memory means 24 and respectively corresponding to the values of a code to be identified. The spectrum memory values S1, S2, Sn are successively compared, by means of the analysis and processing means 30, with the values of the measured spectrum of the altered current F.
On notera que dans ce cas, le dispositif de l'invention comporte accessoirement des moyens 44 de mesure de la stabilité du spectre du courant inducteur du champ magnétique 18, pour contrôler la fiabilité du courant induit G, et de ce fait, des modifications des caractéristiques du champ magnétique 18.
On relèvera quelques applications données à titre indicatif et non limitatif de la méthode de l'invention, au tri sélectif des déchets, au magasinage, à l'identification d'un objet labellisé à encontre de contrefaçons, aux dispositifs de sécurité autorisant un accès sélectif de zones, à la gestion de stocks, au comptage et à l'affichage des scores dans le cadre d'un jeu, tels que jeu de boules de billard par exemple. Quelques exemples d'applications sont illustrés sur les fιg.4 à 10 :It will be noted that in this case, the device of the invention incidentally includes means 44 for measuring the stability of the spectrum of the inducing current of the magnetic field 18, to control the reliability of the induced current G, and therefore modifications of the characteristics of the magnetic field 18. We will note some applications given as an indication and not limiting of the method of the invention, to selective sorting of waste, to storage, to the identification of an object labeled against counterfeits, to security devices authorizing selective access zones, inventory management, counting and displaying scores as part of a game, such as a game of billiard balls for example. Some examples of applications are illustrated in Figures 4 to 10:
Sur la fιg.4, un vêtement 48 est équipé d'un support 4, ou étiquette, sur lequel a été rapporté un code métallique 10 de l'invention. Les moyens 20,22 inducteurs du courant alternatif, ainsi que les moyens de traitement et d'analyse 26,28,30,32 et les moyens de mémoire 24, sont regroupés dans un poste 50 mobile d'identification du code, qui comprend une tête de lecture 52 transportable et manipulable manuellement par un opérateur, la dite tête de lecture 52 étant porteuse de la boucle 20 et étant reliée aux autres moyens 26,28,30,32 et 24, eux-mêmes regroupés dans un poste de calcul 56, par l'intermédiaire d'une liaison 54, filaire ou à transmission d'informations à distance notamment. On notera que dans le cas préféré où les moyens 20,22 inducteurs du champ magnétique 18 et les moyens de mesure 34 et 36 sont regroupés eux-mêmes dans une tête de lecture 52 manipulable manuellement, les valeurs mesurées peuvent être communiquées à distance à un poste de calcul 56 fixe par l'intermédiaire d'une liaison 54 de communication d'informations à distance du type hertzienne ou à infrarouges.On fιg.4, a garment 48 is equipped with a support 4, or label, on which has been reported a metal code 10 of the invention. The means 20, 22 inducing alternating current, as well as the processing and analysis means 26, 28, 30, 32 and the memory means 24, are grouped in a mobile station 50 for identifying the code, which includes a read head 52 transportable and manipulated manually by an operator, said read head 52 being carrier of the loop 20 and being connected to the other means 26,28,30,32 and 24, themselves grouped in a calculating station 56 , via a link 54, wired or remote information transmission in particular. It will be noted that in the preferred case where the means 20, 22 inducing the magnetic field 18 and the measuring means 34 and 36 are grouped themselves in a read head 52 which can be manipulated manually, the measured values can be communicated remotely to a computation station 56 fixed by means of a link 54 for remote information communication of the hertzian or infrared type.
Sur la fig.5, le code 10 est incorporé dans l'objet à identifier. Sur l'exemple illustré, l'objet est une pièce de tissu 55, serviette ou torchon par exemple, et le code est composé d'un alliage amagnétique incorporé au tramage du tissu ou déposé postérieurement à la confection de la pièce de tissu 55. Cette application permet par exemple d'effectuer un tri entre différentes pièces de tissus de nature différente, en
vue de leur nettoyage industriel selon les procédés de nettoyage spécifiques à ces tissus.In fig. 5, the code 10 is incorporated into the object to be identified. In the example illustrated, the object is a piece of fabric 55, for example a towel or cloth, and the code is composed of a non-magnetic alloy incorporated into the screen of the fabric or deposited after the fabric piece 55 has been made. This application allows for example to sort between different pieces of fabrics of different nature, by view of their industrial cleaning according to the cleaning processes specific to these fabrics.
Sur la fig.6, l'objet à identifier est constitué d'une clé 58, notamment fabriquée à partir d'une combinaison d'alliages amagnétiques différents constituant le code 10. Cette application permet de substituer à, ou de compléter le, codage mécanique 60 de la clé 58 par les moyens de codage 10 de l'invention, pour permettre un accès autorisé à un local, ou encore pour déclencher une alarme 62 en cas de non reconnaissance du code. On notera que dans ce cas, le poste d'identification 50 susvisé n'est pas mobile, mais fixe.In fig. 6, the object to be identified consists of a key 58, in particular made from a combination of different non-magnetic alloys constituting the code 10. This application makes it possible to substitute, or to complete, the coding mechanical 60 of the key 58 by the coding means 10 of the invention, to allow authorized access to a room, or even to trigger an alarm 62 in the event of non-recognition of the code. It will be noted that in this case, the aforementioned identification station 50 is not mobile, but fixed.
Sur la fig.7, une pluralité de récipients 64,66,68, bouteilles notamment, sont équipés d'un code métallique 10 amagnétique respectif et différent. On notera que les codes sont déposés sur un support rapporté sur les récipients, tel que sur leur couvercle ou bouchon 70, ou encore sur leur étiquette 72. Selon cette application, la méthode de l'invention est avantageusement employée pour la comptabilisation des stocks disponibles, en rayon de magasin ou encore dans les réserves de boissons des chambres d'hôtels. L'identification des récipients s'effectue par exemple en les faisant circuler le long d'une goulotte 80, qui supporte des moyens générateurs du champ magnétique 18, assimilables à la boucle 20 et aux moyens 22 générateurs du courant alternatif inducteur, associés à des capteurs 78 reliés à un poste de calcul 56.In Fig.7, a plurality of containers 64,66,68, bottles in particular, are equipped with a respective and different non-magnetic metal code 10. It will be noted that the codes are deposited on a support attached to the containers, such as on their lid or stopper 70, or even on their label 72. According to this application, the method of the invention is advantageously used for accounting for available stocks , in store shelves or in the beverage reserves of hotel rooms. The containers are identified for example by circulating them along a chute 80, which supports means generating the magnetic field 18, comparable to the loop 20 and to the means 22 generating the inductive alternating current, associated with sensors 78 connected to a calculating station 56.
Sur la fig.8, un code métallique 10 amagnétique est incorporé dans la semelle d'une chaussure 74, d'enfant notamment, de manière à détecter une zone dangereuse dans laquelle a été préalablement placé un poste fixe d'identification 50, dont la boucle 20 entoure le périmètre de la dite zone, en étant par exemple incorporée dans un tapis de sol 76. On comprendra qu'au-delà de cet exemple précis, la méthode de l'invention, et les moyens mis en œuvre, peuvent être appliqués
aux dispositifs d'interdiction de franchissement d'une limite de zone, pour le gardiennage des animaux par exemple.In FIG. 8, a non-magnetic metallic code 10 is incorporated in the sole of a shoe 74, especially for children, so as to detect a dangerous zone in which a fixed identification station 50 has been previously placed, the loop 20 surrounds the perimeter of said area, for example being incorporated in a floor mat 76. It will be understood that beyond this specific example, the method of the invention, and the means used, can be applied devices to prohibit the crossing of an area boundary, for the keeping of animals for example.
D'autres applications sont possibles, notamment dans les plateformes de traitement de mâchefer, les centres de tri de déchets ménagers, les usines d'incinération de déchets, les fonderies de métaux ferreux ou non ferreux, etc..
Other applications are possible, in particular in clinker processing platforms, sorting centers for household waste, waste incineration plants, foundries of ferrous or non-ferrous metals, etc.
Claims
1. Méthode de détection et d'identification d'un objet (4,48,55,58,64,66,68,74) parmi une pluralité d'objets, du genre de méthode consistant successivement à affecter un code au dit objet, à reconnaître le code par des moyens de lecture coopérant, et à comparer les valeurs relatives au code avec les valeurs d'un code de référence préalablement mémorisées, caractérisée en ce qu'elle comprend les étapes successives suivantes, consistant: a) à affecter à l'objet (4) au moins une masse métallique (6,8,10) à base d'au moins un alliage amagnétique constituant le code à identifier, ledit code étant déterminé au moment de la fabrication de l'alliage, b) à soumettre l'objet (4) porteur du code à un champ magnétique (18) pour en modifier les caractéristiques, puis, c) à mesurer lesdites modifications des caractéristiques du champ magnétique (18), puis, d) à comparer les mesures à identifier (C,C/D,D,E,f(C,D), f(E)), à des valeurs de référence (C0,C0/D0,D0,E0), préalablement mémorisées et relatives à un code de référence.1. Method for detecting and identifying an object (4,48,55,58,64,66,68,74) among a plurality of objects, of the kind of method consisting successively in assigning a code to said object , to recognize the code by cooperating reading means, and to compare the values relating to the code with the values of a previously stored reference code, characterized in that it comprises the following successive steps, consisting of: a) assigning to the object (4) at least one metallic mass (6,8,10) based on at least one non-magnetic alloy constituting the code to be identified, said code being determined at the time of manufacture of the alloy, b) subjecting the object (4) carrying the code to a magnetic field (18) to modify the characteristics, then, c) measuring said modifications in the characteristics of the magnetic field (18), then, d) comparing the measurements to identify (C, C / D, D, E, f (C, D), f (E)), to reference values (C0, C0 / D0, D0, E0 ), previously memorized and relating to a reference code.
2. Dispositif pour la mise en œuvre de la méthode selon la revendication 1 , caractérisé en ce qu'il comprend : a) un code formé d'au moins une masse métallique (6,8,10) à base d'au moins un alliage amagnétique, b) des moyens (20,22) inducteurs d'un champ magnétique (18) initialement induit, c) des moyens (34) de mesure des caractéristiques modifiées du champ magnétique (18) par l'action du code (6,8,10), d) des moyens (26,28,30,32) électroniques d'analyse et de traitement des valeurs (A,B) en provenance des moyens de mesure (34), pour la comparaison entre les caractéristiques du champ magnétique modifié par le code (6,8,10), et les caractéristiques du champ magnétique initialement induit, et e) des moyens (24) de mémoire pour la mémorisation préalables des valeurs de référence (C0,C0/D0,D0,E0) correspondantes à un code respectif et leur comparaison avec les valeurs2. Device for implementing the method according to claim 1, characterized in that it comprises: a) a code formed of at least one metallic mass (6,8,10) based on at least one non-magnetic alloy, b) means (20,22) inducing an initially induced magnetic field (18), c) means (34) for measuring the modified characteristics of the magnetic field (18) by the action of the code (6,8,10), d) electronic means (26,28,30,32) for analysis and processing the values (A, B) coming from the measurement means (34), for the comparison between the characteristics of the magnetic field modified by the code (6,8,10), and the characteristics of the magnetic field initially induced, and e) memory means (24) for prior storage of the reference values (C0, C0 / D0, D0, E0) corresponding to a respective code and their comparison with the values
(C,C/D,D,E,f(C,D),f(E)) analysées et traitées relatives à la modification du champ magnétique (18).(C, C / D, D, E, f (C, D), f (E)) analyzed and processed relating to the modification of the magnetic field (18).
3. Dispositif selon la revendication 2, caractérisé :en ce que les moyens inducteurs sont constitués par des moyens (22) générateurs d'un courant alternatif (G), alimentant en énergie une boucle (20) à au moins une spire génératrice du champ magnétique (18).3. Device according to claim 2, characterized: in that the inducing means are constituted by means (22) generating an alternating current (G), supplying energy with a loop (20) to at least one turn generating the field magnetic (18).
4. Dispositif selon la revendication 2, caractérisé en ce que les moyens de mesure (34) sont des moyens de mesure de l'une quelconque au moins des caractéristiques du courant alternatif, comprenant sa fréquence, son phasage, son amplitude et de son spectre, de part et d'autre d'une résistance (36) interposée entre les moyens générateurs (22) du courant alternatif et la boucle (20).4. Device according to claim 2, characterized in that the measuring means (34) are means for measuring at least any one of the characteristics of the alternating current, comprising its frequency, its phasing, its amplitude and its spectrum , on either side of a resistor (36) interposed between the generator means (22) of the alternating current and the loop (20).
Dispositif selon la revendication 4, caractérisé en ce que les moyens électroniques (26,28,30,32) d'analyse et de traitement sont des moyens de comparaison entre les valeurs des mesures (B) des caractéristiques du courant induit (G) et des mesures (A) des caractéristiques du courant altéré (F).Device according to claim 4, characterized in that the electronic means (26,28,30,32) of analysis and processing are means of comparison between the values of the measurements (B) of the characteristics of the induced current (G) and of the measurements (A) of the characteristics of the altered current (F).
6. Dispositif selon l'une quelconque des revendications 2 à 5, caractérisé en ce que les moyens de mémoire comprennent l'un quelconque des moyens de lecture (40) et des moyens de saisie (38), associés à des moyens de mémorisation (24) des valeurs (C0,C0/D0,D0,E0) d'un code de référence.6. Device according to any one of claims 2 to 5, characterized in that the memory means comprise any one of the reading means (40) and input means (38), associated with storage means ( 24) values (C0, C0 / D0, D0, E0) of a reference code.
7. Dispositif selon l'une quelconque des revendications 2 à 6, caractérisé en ce que l'alliage amagnétique constituant le code est à base de cuivre, laiton, acier inoxydable, aluminium, zinc, ou tout autre métal non ferreux. 7. Device according to any one of claims 2 to 6, characterized in that the non-magnetic alloy constituting the code is based on copper, brass, stainless steel, aluminum, zinc, or any other non-ferrous metal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR00/03256 | 2000-03-14 | ||
| FR0003256A FR2806483B1 (en) | 2000-03-14 | 2000-03-14 | METHOD FOR DETECTION AND IDENTIFICATION OF AN OBJECT AMONG A PLURALITY OF OBJECTS, AND DEVICE FOR ITS IMPLEMENTATION |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001069288A1 true WO2001069288A1 (en) | 2001-09-20 |
Family
ID=8848067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2001/000765 WO2001069288A1 (en) | 2000-03-14 | 2001-03-14 | Method for detecting and identifying an object among a plurality of objects, and device therefor |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2806483B1 (en) |
| WO (1) | WO2001069288A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4663612A (en) * | 1984-02-16 | 1987-05-05 | Sigma Security Inc. | Pattern-comparing security tag detection system |
| WO1989006810A1 (en) * | 1988-01-15 | 1989-07-27 | Scientific Generics Limited | Installation and detection method for concealed objects |
| US5430278A (en) * | 1989-09-23 | 1995-07-04 | Gunther Krieg | Bar code, as well as process and apparatus for reading the same |
| WO1996031790A1 (en) * | 1995-04-04 | 1996-10-10 | Scientific Generics Limited | Spatial magnetic interrogation |
| US5965214A (en) * | 1996-04-23 | 1999-10-12 | Flying Null Limited | Methods for coding magnetic tags |
| US5986926A (en) * | 1997-08-27 | 1999-11-16 | Meto International Gmbh | Identification element and method of manufacturing an identification element |
| WO1999067099A1 (en) * | 1998-06-23 | 1999-12-29 | Flying Null Limited | Transferable magnetic film and its use |
-
2000
- 2000-03-14 FR FR0003256A patent/FR2806483B1/en not_active Expired - Fee Related
-
2001
- 2001-03-14 WO PCT/FR2001/000765 patent/WO2001069288A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4663612A (en) * | 1984-02-16 | 1987-05-05 | Sigma Security Inc. | Pattern-comparing security tag detection system |
| WO1989006810A1 (en) * | 1988-01-15 | 1989-07-27 | Scientific Generics Limited | Installation and detection method for concealed objects |
| US5430278A (en) * | 1989-09-23 | 1995-07-04 | Gunther Krieg | Bar code, as well as process and apparatus for reading the same |
| WO1996031790A1 (en) * | 1995-04-04 | 1996-10-10 | Scientific Generics Limited | Spatial magnetic interrogation |
| US5965214A (en) * | 1996-04-23 | 1999-10-12 | Flying Null Limited | Methods for coding magnetic tags |
| US5986926A (en) * | 1997-08-27 | 1999-11-16 | Meto International Gmbh | Identification element and method of manufacturing an identification element |
| WO1999067099A1 (en) * | 1998-06-23 | 1999-12-29 | Flying Null Limited | Transferable magnetic film and its use |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2806483B1 (en) | 2004-01-09 |
| FR2806483A1 (en) | 2001-09-21 |
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