EP3908979A1 - Procédé d'association d'un marquage à un objet - Google Patents
Procédé d'association d'un marquage à un objetInfo
- Publication number
- EP3908979A1 EP3908979A1 EP20706559.0A EP20706559A EP3908979A1 EP 3908979 A1 EP3908979 A1 EP 3908979A1 EP 20706559 A EP20706559 A EP 20706559A EP 3908979 A1 EP3908979 A1 EP 3908979A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- marking
- cavity
- associating
- cavities
- glass container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/08—Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
- G06Q10/083—Shipping
- G06Q10/0833—Tracking
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06046—Constructional details
- G06K19/06159—Constructional details the marking being relief type, e.g. three-dimensional bar codes engraved in a support
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/262—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used recording or marking of inorganic surfaces or materials, e.g. glass, metal, or ceramics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06018—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding
- G06K19/06028—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding using bar codes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
- G06K19/083—Constructional details
- G06K19/086—Constructional details with markings consisting of randomly placed or oriented elements, the randomness of the elements being useable for generating a unique identifying signature of the record carrier, e.g. randomly placed magnetic fibers or magnetic particles in the body of a credit card
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
- G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10861—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices sensing of data fields affixed to objects or articles, e.g. coded labels
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/018—Certifying business or products
- G06Q30/0185—Product, service or business identity fraud
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K2019/06215—Aspects not covered by other subgroups
- G06K2019/06271—Relief-type marking
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/018—Certifying business or products
Definitions
- the invention relates to the technical field of reading a marking made on or in a transparent or translucent object.
- the invention relates to the reading of two-dimensional codes such as Datamatrix engraved or marked on the surface of glass containers or containers, scrolling at high speed in an online inspection system.
- a security label has on one side a marking which is specific to it, and on the other side an adhesive layer allowing it to be held on a glass article for example.
- the adhesive layer is characterized by an extremely high power so that it is not possible to peel off the label without tearing it.
- the marking then becomes illegible, which ensures that the marking cannot be affixed to another article.
- an alternative consists in carrying out the marking directly on the glass article by a hot marking technique.
- the marking is then etched on the surface of the glass article, making it impossible to remove it without damaging the article itself.
- the present invention aims to respond to this problem by proposing a method and a device, making it possible to associate more securely a marking with a single article.
- the invention proposes a method of associating a marking with an object, implementing the following steps:
- the invention differs from the marking solutions described above, in that it is associated with the specific form of marking at a single position on an object.
- the invention makes it possible to associate a marking more securely with a single object.
- the marking of an object produced in a manual or automated manner always includes a certain imprecision when it is affixed or produced on a support.
- the invention advantageously exploits this imprecision, by correlating in a database the form and the position of the marking.
- correlate we mean a relation making it possible to identify a position from a form or vice versa.
- the authenticity of a marking can now be checked with respect to its position on an object.
- the invention makes it possible to associate in a certain manner a specific marking with a single and single support.
- the steps for identifying the position and the shape of the marking can be reversed or carried out at the same time.
- the invention also relates to a method of associating a marking comprising several distinctive elements, implementing the following steps:
- this embodiment implements an additional measure, making it possible to quantify an imprecision relating to the production of at least two distinctive elements making up the marking. Marking always has a certain imprecision when it is carried out on a support.
- the invention exploits this imprecision by measuring the distance between at least two distinctive elements of the marking, a distance which varies slightly between two identical markings due to their production process.
- the invention measures characteristics which are intrinsic to each marking when they are affixed or produced on a support. The value of this measure or these measures is subsequently correlated to the form of the marking.
- the invention also relates to a method of associating a marking comprising several distinctive cavities, implementing the following steps:
- an intrinsic characteristic of a cavity is measured from a light pattern, reflected or transmitted by the cavity.
- the term "intrinsic characteristic" means for example the depth and / or the curvature of the cavity, and / or the dimensions of the cavity on the surface of the object.
- the same light pattern is used to measure the intrinsic characteristics of several marking cavities.
- the pattern is bright and oval or rectangular in shape.
- the light pattern may include alternations of dark fringes and light fringes parallel to each other.
- the marking when the marking is present on a cylindrical or partially cylindrical face with respect to an axis of revolution, the light pattern illuminates the cavities so that its largest dimension is perpendicular or substantially perpendicular to the axis of revolution.
- An intrinsic characteristic of a cavity can be measured from the width of a light pattern inscribed in the cavity. At least two cavities can be produced by a hot stamping technique.
- the depth of the cavities is less than 100 ⁇ m, preferably less than 50 ⁇ m.
- depth is meant a measurement taken in a direction normal or substantially normal to the surface of the wall of the object.
- the largest dimension of the cavities is equal to or less than 500 ⁇ m, preferably between 400 ⁇ m and 100 ⁇ m.
- the marking is present on an at least partially transparent wall of the object.
- the object is a glass article such as a bottle-type glass container.
- the invention also relates to a method of verifying a marking on an object, implementing the following steps:
- the invention also relates to a device for association and / or verification of the position of a marking made hot on a glass container, characterized in that it comprises:
- an optical detection system configured to identify the position as well as the form of a marking on the glass container
- the association and / or verification device described above comprises an optical telecentric detection system, as well as a light source capable of projecting a light pattern of oval shape, preferably rectangular.
- the light source projects a telecentric light beam.
- the device may include an optical diopter making it possible to focus the light rays located at the periphery of the beam.
- FIG. 1 represents a front view of an original glass bottle of cylindrical shape, comprising on an lateral face an original Datamatrix code
- FIG. 2 represents a method of measuring the position of the Datamatrix code on the glass bottle illustrated in [Fig. 1]
- [Fig. 3] represents a method of measuring the position of a copy of the Datamatrix code present on the bottle illustrated in [Fig. 2], present on a counterfeit glass bottle;
- FIG. 4 represents an enlarged view of the Datamatrix code present on the bottle illustrated in [Fig. 1];
- FIG. 5 represents an enlarged view of the Datamatrix code present on the bottle illustrated in [Fig. 3];
- FIG. 6 shows a partial longitudinal section of the bottle illustrated in [Fig. 1], at the level of its Datamatrix code
- FIG. 7 represents an enlarged view of the Datamatrix code present on the bottle illustrated in [Fig. 1], lit by a light strip;
- FIG. 8 represents an enlarged view of the Datamatrix code present on the bottle illustrated in [Fig. 3], lit by a light strip;
- FIG. 9 represents a diagram of a device according to the invention, of association and / or verification of the position of a marking made hot on a glass container;
- FIG. 10 represents a diaphragm belonging to the association and / or verification device illustrated by [Fig. 9];
- FIG. 11 shows a diagram of a variant of a device according to the invention, of association and / or verification of the position of a marking made hot on a glass container.
- a glass container 2 may have at a side face 4, a specific marking in the form of a high density two-dimensional barcode, also called Datamatrix code 6.
- a Datamatrix code is in the form of a matrix made up of juxtaposed points or squares. According to the example illustrated in [Fig. 1], the Datamatrix code consists of four points A, B, C and D, forming a substantially rectangular pattern.
- counterfeit glass containers may also include a Datamatrix code substantially identical to that present on an original glass container. Therefore, the introduction into the recycling cycle of these counterfeits distorts the process of counting the number of recycling cycles described above.
- the invention aims to solve this technical problem, by proposing a method making it possible to associate more securely, a specific marking with a single glass container.
- the position of a Datamatrix code 6 present on a side face 4 of a glass container 2 is measured.
- the glass container 2 can for example be a bottle with a flat bottom and a cylindrical shape, as illustrated in [Fig. 1]
- the bottom 8 of the bottle then serves as a benchmark for measuring the height of the Datamatrix code 6, and the axis of revolution 10 of the bottle serves as a benchmark for measuring the inclination of said code on the bottle.
- these benchmarks are mentioned by way of example and not intended to limit the scope of the invention.
- Other points or axes of reference can thus be chosen, such as the neck of the bottle, a stop or any other distinctive characteristic.
- the height H of the Datamatrix code is evaluated by measuring the smallest distance between a point of the Datamatrix code chosen arbitrarily, in this case point A, and the bottom 8 of the bottle.
- the inclination of the Datamatrix code is evaluated by measuring the angle 9 formed between the cylindrical axis 10 of the bottle and a straight line 11 passing through the center of two points of the Datamatrix code, for example points A and B.
- the shape of the Datamatrix code is identified from its outline, the arrangement of the points making it up and / or its dimensions.
- the shape of the Datamatrix code is associated in a database, with the height H as well as with the angle of inclination 9 measured during the first step.
- the first and the second step can be reversed or else carried out simultaneously.
- the association method may optionally include an intermediate step, consisting in identifying from the form of the Datamatrix code specific information. This information can then be substituted in the database for the form of the Datamatrix 6 code. Specific information from a Datamatrix code can indicate the place of production of a glass container, its manufacturing mold and / or a series associated with said container.
- Specific information from a Datamatrix code can indicate the place of production of a glass container, its manufacturing mold and / or a series associated with said container.
- the height H as well as the angle of inclination 9 can then be associated in one database, with one or other of the information mentioned above. For example, the height H as well as the angle of inclination 9 can be associated with the place of production of the glass container, in a database.
- the invention also relates to a method for verifying the originality of a Datamatrix code 6 ′ present on a glass container 2 ′ as illustrated in [Fig. 3]
- the verification process implements the first and second steps described above.
- a third step called verification the height H is compared as well as the angle of inclination 9 'of the Datamatrix code 6' which has been measured on the glass container 2 ', with respect to a height H and an angle of inclination 9 previously recorded in the database described above and associated with the form or with information linked to the Datamatrix code 6.
- the first and the second step can be reversed or else performed simultaneously.
- association and verification methods described above make it possible to control more securely that the Datamatrix code 6 present on a glass container 2 is authentic. Indeed, the application or the realization of a Datamatrix code always contains a certain imprecision when it is arranged on an object. Therefore, as illustrated in Figures 2 and 3, the reproduction of an identical Datamatrix code on two different glass containers 2 and 2 ', is characterized on each glass container by a height and a slightly different inclination from the Datamatrix codes 6 and 6 '.
- the association and verification methods according to the invention make it possible to detect these differences very quickly in order to identify more surely that the glass container 2 ′ is a counterfeit of the glass container 2, despite the fact that the Datamatrix code 6 'is substantially identical to Datamatrix code 6. The infringing glass container 2' will then be identified by the invention as a counterfeit of the glass container 2 which must be discarded.
- the accuracy of the above measurements must be equal, preferably less than the range of uncertainty when applying or producing a Datamatrix code on a glass container.
- this uncertainty depends on the technique used to paste or produce the Datamatrix code on a glass container.
- the Datamatrix code is pasted on a glass container, its height and its inclination are respectively measured with an accuracy equal to or less than a hundredth of a millimeter, and with an accuracy equal to or less than a tenth of a degree .
- the relative position is measured between at least three points of a Datamatrix 6 code illustrated in [Fig. 4] According to the present example, the distance XI between the center of points A and C, and the distance Y1 between the centers of points A and B.
- a second step we identify the form of the Datamatrix code 6.
- association we associate in a database, the form of the Datamatrix code at the measured distances XI and Yl.
- the first and the second step can be reversed or else carried out simultaneously. Of course, one can associate with the form of the Datamatrix 6 code a greater number of distances measured between other points of the code.
- the invention also relates to a second method of verifying the originality of a Datamatrix code on a glass container, implementing the first and the second step of the second embodiment described above.
- a third so-called verification step the value of the measured distances XI ′ and U is compared between the points of the Datamatrix code 6 ′, with respect to the values of distances recorded XI and Yl for the same points, in the database. constituted above, and associated with the information of said Datamatrix code 6.
- the first and the second step can be reversed or else carried out simultaneously.
- the second association and verification methods make it possible to control more surely that the Datamatrix code present on a glass container is authentic. Indeed, the application or the realization of point forming a Datamatrix code always contains a certain imprecision. Therefore, as illustrated by [Fig. 5], the reproduction of the same Datamatrix code on a counterfeit glass container will be characterized by slightly different differences between the same points of the Datamatrix code. The glass container 2 ′ will then be immediately identified by the invention as a counterfeit of the glass container 2 which must be discarded.
- the above measurements must be equal, preferably less than the uncertainty range to achieve the points of a Datamatrix code.
- this uncertainty depends in particular on the technique used to bond or make said points on a glass container.
- the points of the Datamatrix code are printed on a glass container, their distance is measured with an accuracy equal to or less than a tenth of a millimeter, preferably with a precision equal to or less than a hundredth of a millimeter.
- the Datamatrix code is produced by a hot stamping technique on a glass container, their distance is measured with an accuracy equal to or less than a tenth of a millimeter, preferably with a precision equal to or less than a hundredth of a millimeter.
- a Datamatrix code composed of a grid of 16 points by 16 points, with a height and a width of 8 mm, the theoretical pitch between two points is of the order of 500 microns.
- the measurement accuracy according to the invention is equal to or less than 10 microns, in order to be able to measure the fluctuations in the manufacturing process of the Datamatrix code as mentioned above.
- the measurements made to read a Datamatrix code are carried out with an accuracy greater than or equal to 100 microns. In other words, the usual methods of reading Datamatrix codes do not measure fluctuations in the positioning of Datamatrix points.
- the invention also relates to a third method of associating a Datamatrix code with a single glass container, the Datamatrix code being produced by a hot stamping technique.
- the hot stamping consists in producing cavities 12A, 12B, 12C and 12D, at the level of a front face 14 of a glass container, using a LASER source for example.
- the dimensions of the cavities vary as a function of the position and the angle of inclination of the front face 14 relative to the focal point of the LASER beam.
- hot stamping is carried out when the glass containers 2 are conveyed from one station to another.
- each glass container has a substantially different position when it is marked due to its movement, relative to the focal point of the LASER beam. This is why for the same point of the same Datamatrix code, the position as well as the dimensions of the cavity associated with said point, vary from one glass container to another as illustrated by FIGS. 4 and 5.
- FIGS. 4 and 6 respectively represent a front view and a longitudinal section of a Datamatrix code 6, produced by a LASER source on a glass container 2 of cylindrical shape with respect to an axis of rotation 10.
- the points A, B, C and D forming the Datamatrix 6 code should be of identical dimensions.
- the diameter, the depth and its convexity vary for the reasons mentioned above.
- the invention proposes to advantageously use these uncertainties linked to the hot stamping technique, to more surely identify the originality of a Datamatrix code 6 on an original glass container 2, from at least one measurement of the image of a light pattern reflected by a cavity composing the Datamatrix code.
- a pattern is projected onto the glass container 2 light in the form of a light strip 16.
- the light strip illuminates the glass container 2 so that its largest dimension is perpendicular or substantially perpendicular to the axis of rotation 10 of the glass container 2.
- the light strip 16 is dimensioned to illuminate at least two points or two cavities of a Datamatrix 6 code present on a front face 14 of the bottle, preferably the entire Datamatrix 6 code.
- the width of the light strip 16 inscribed in said cavity is measured.
- width is meant here a dimension of the light strip in a direction parallel or substantially parallel to the axis of rotation 10 of the glass container 2.
- the width of the light strip is measured for the four cavities: YA, YB, YC, YD.
- the form of the Datamatrix 6 code is identified.
- the second and the third step can be reversed or else carried out simultaneously.
- association we associate in a database, in the form of the Datamatrix code 6 at least one cavity A with the measured width YA of the light strip visible in said cavity.
- the invention also relates to a third method of verifying the originality of a Datamatrix code present on a 2 'glass container, the Datamatrix code being produced by a hot stamping technique.
- the third verification method implements the first, second and third stages described above, making it possible to measure the width YA 'of a light strip 16 inscribed in at least one cavity A' and to identify the shape of the Datamatrix code 6 '.
- the second and third stages can be reversed or else carried out simultaneously.
- the measured value of the width YA 'of a light strip inscribed in a cavity A' of the Datamatrix code 6 ' is compared with a width YA of a light strip recorded in a base. of data constituted above, corresponding to the same cavity A associated with the same form of the Datamatrix 6 code.
- the third association and verification methods described above make it possible to control more securely that the Datamatrix code 6 produced by a hot stamping technique on a glass container 2 is authentic. Indeed, as mentioned above, the hot stamping of a Datamatrix code always contains a certain imprecision during its production. Therefore, as illustrated by FIGS. 7 and 8, the reproduction of the Datamatrix code 6 on a counterfeit glass container 2 ′, is characterized by a depth and / or a shape of different cavities between two points of the Datamatrix code 6.
- the invention uses this intrinsic defect in hot stamping to characterize several cavities of the Datamatrix code from the image of the same light pattern reflected by said cavities.
- the dimensions of the light strip reflected by each cavity vary significantly from one cavity to another, due to the difference in depth and / or shape of said cavities.
- Figures 7 and 8 we can observe a width different YA and YA 'for the light strips inscribed in the cavities A and A', representing respectively the same point of an original and counterfeit Datamatrix code.
- This difference in width YA and YA ' mainly reflects in this case a difference in depth between the cavities A and A'.
- each cavity at a substantially unique depth due to the uncertainties intrinsic to the technique of hot marking of glass bottles moving on a conveyor.
- the invention makes it possible to quickly and more surely ensure the originality of a Datamatrix code, produced by a hot stamping technique on a glass container, by ensuring quickly and simply that the dimensions of a light pattern reflected by at least one cavity of the code correspond to the dimensions previously recorded in a database.
- the association and verification methods according to the invention make it possible to very quickly detect these differences in width of light strips inscribed in the cavities, in order to identify more securely than the container.
- glass 2 ' is a counterfeit of the glass container 2, despite the fact that the Datamatrix codes 6 and 6' strictly code the same information.
- the counterfeiting glass container 2 ′ will then be immediately identified by the invention as a counterfeit to be discarded.
- a calibration step is implemented.
- This calibration step consists of measuring the depth of several cavities using an optical profilometer of the confocal chromatic type.
- the calibration step makes it possible to map the depths of the cavities forming the marking.
- the calibration step can be carried out before or after the first step described above.
- the calibration step makes it possible to establish a calibration curve between the measured widths of the light strips and the real depths of the cavities which reflect said light strips.
- the depths of the measured cavities can also be used as a coding variable for the Datamatrix code, for example.
- the measurements made during the third association and verification methods described above must be carried out under substantially the same conditions in order to compare the measurements carried out under the best conditions.
- the invention also relates to a device 18 for association and / or verification of a Datamatrix code 6, produced by a hot stamping technique on a glass container 2, capable of implementing the third method d association and / or verification described above.
- a device 18 for association and / or verification according to the invention is illustrated in [FIG. 9]
- the device 18 comprises an optical detection system 20 of telecentric type, a light source 22 and a semi-reflecting plate 24.
- the semi-reflecting plate 24 is arranged to allow a light beam 26 emitted by the light source 22, to illuminate the surface of a glass container 2 present in the depth of field 28 of the optical detection system 20.
- the semi-reflecting plate 24 is configured to allow the light reflected by the glass container 2, to be perceived by the optical detection system 20.
- the optical detection system 20 is connected to a central unit 30.
- the central unit 30 comprises means for storing an association and / or verification method described above as well as a database .
- the central unit 30 also comprises calculation means able to implement the stored method or methods, whether automated or not.
- the central unit 30 may include a display device allowing an operator to control the image acquired by the optical detection system 20.
- the device 18 also includes a diaphragm 32 defining an opening 36 of rectangular shape.
- the diaphragm 32 is interposed between the light source 22 and the semi-reflecting plate 24, so that the light beam 26 'passing through the opening 36 forms a light strip 16 capable of illuminating at least part of a Datamatrix code 6 hot stamped on a glass container 2.
- the length DI of the diaphragm 32 is chosen so that the light strip 16 covers at least the length of the portion of the space observed by the optical detection system 20.
- length of the portion of the space means a dimension of the space observed by the optical detection system 20, in a direction perpendicular or substantially perpendicular to the optical detection axis of the optical detection system 20.
- the length DI is between 2 cm and 20 cm, preferably between 5 cm and 15 cm.
- the width D2 of the diaphragm 32 is chosen so that the image of the light strip 16 is identifiable in at least one cavity of a Datamatrix code produced on the surface of a glass container, the cavity reflecting the beam 26 'light emitted by the light source 22.
- the width of the diaphragm 32 must be sufficient for the optical detection system 20 to be able to allow the central unit 30 to measure the width of the image of the slot, for example YA as shown in [ Fig. 7], at the level of said cavity A of the Datamatrix code 6 present on the glass container 2.
- the width D2 of the diaphragm 32 is between 0.5 cm and 5 cm, preferably between 1 , 25 cm and 3.5 cm.
- the optical detection system 20 comprises a high resolution camera provided with an optical sensor of 5 mega pixels, with a macro objective allowing a field of observation at 100 mm from the objective, from 20 mm by 20 mm and a depth of field of the order of 20 mm.
- the light source 22 comprises several light-emitting diodes, configured to emit a light beam in a range of wavelengths included in the visible spectrum of light.
- the light source 22 projects a telecentric or substantially telecentric light beam.
- the device 18 described above advantageously makes it possible to obtain a contrasted image with little geometric deformation, of a Datamatrix code 6 present on a side face 4 of a glass container 2 located in the depth of field of the optical detection system 20.
- a device 18 ′ may comprise an optical diopter 36 making it possible to focus the light strip 16 at the level of a hot stamped Datamatrix code on a glass container.
- This embodiment is particularly advantageous when the Datamatrix 6 code is present on a convex or concave surface, to optimize the light flux and / or obtain a homogeneous light flux of light, in order to limit the aberrations and errors of normal measurements in any point on the curved surface, over at least the useful surface area to be checked.
- a Fresnel lens 36 can be interposed between the diaphragm 32 and the glass container that one wishes to observe.
- the width D2 of the slot is adjusted as a function of the internal curvature of the cavity or cavities illuminated by the light strip 16, so that the width of the light strip observable by the optical detection system 20, or measurable by the central unit 30 in each cavity.
- the hot stamping of Datamatrix points with a LASER source on a glass container, creates cavities whose depth and curvature vary.
- the depth of the cavities varies between 0 and 50 ⁇ m. Therefore, the interior of each cavity is characterized by its own depth, reflecting the image of the light strip 16 with a different width.
- the width D2 of the diaphragm 32 is chosen so that the edges of the diaphragm delimiting the width of the light strip 16 are both visible in at least two separate cavities, preferably at least three separate cavities.
- the width D2 of the diaphragm 32 is adjusted so that the shallowest cavity of the Datamatrix code reflects the image of a light strip which is as wide as possible (see for example the reference YA in [Fig. 7] and the reference YD 'in [Fig. 8]). This choice is motivated in order to be able to observe the opposite edges of the light strip 16 reflected in each cavity. In fact, the less a cavity, the larger its equivalent focal length and generates an image of the wide light slit (see [Fig. 7] and 8).
- the depth of the cavities can vary, resulting in images of light slits of different widths.
- the device according to the invention thus makes it possible to precisely distinguish identical cavities at the level of the front face 14 but of different depths.
- the device according to the invention exploits the optical properties of each cavity to distinguish said cavities from one another as a function of their depth.
- a width D2 of the diaphragm 32 which is between 0.5 cm and 5 cm, preferably between 1.25 cm and 3.5 cm, when the front face 4 of the glass container 2 is positioned at a distance from the diaphragm 32 of the order of 60 mm.
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Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1900129A FR3091612B1 (fr) | 2019-01-07 | 2019-01-07 | procédé d’association d’un marquage à un objet |
PCT/FR2020/050013 WO2020144425A1 (fr) | 2019-01-07 | 2020-01-06 | Procédé d'association d'un marquage à un objet |
Publications (1)
Publication Number | Publication Date |
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EP3908979A1 true EP3908979A1 (fr) | 2021-11-17 |
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ID=66867360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20706559.0A Pending EP3908979A1 (fr) | 2019-01-07 | 2020-01-06 | Procédé d'association d'un marquage à un objet |
Country Status (5)
Country | Link |
---|---|
US (1) | US11907784B2 (fr) |
EP (1) | EP3908979A1 (fr) |
BR (1) | BR112021013353A2 (fr) |
FR (1) | FR3091612B1 (fr) |
WO (1) | WO2020144425A1 (fr) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040200558A1 (en) * | 1998-08-13 | 2004-10-14 | Stevens Timothy A. | Label system and method for label alignment and placement |
KR100644644B1 (ko) * | 2004-10-28 | 2006-11-10 | 삼성전자주식회사 | 레이저 반점을 제거한 조명계 및 이를 채용한 1 패널식프로젝션 시스템 |
US20070222556A1 (en) * | 2005-05-17 | 2007-09-27 | Robbins Gene A | Tracking system for distributable objects which are marked in single laser shot events with dynamically variable images |
BE1016782A3 (fr) * | 2005-09-22 | 2007-06-05 | Laser Engineering Applic | Procede de marquage interne par laser dans les materiaux transparents et laser et dispositif utilises pour l'application de ce procede. |
FR2907370B1 (fr) * | 2006-10-18 | 2017-11-17 | Tiama | Procede et installation pour le marquage a chaud d'objets translucides ou transparents |
US9844951B2 (en) * | 2010-04-30 | 2017-12-19 | Becton Dickinson France | Method for marking a transparent container |
FR3008206B1 (fr) * | 2013-07-02 | 2017-04-21 | Guillaume Bathelet | Systeme d'inspection d'un objet au moins translucide presentant au moins un marquage |
US11047017B2 (en) * | 2014-09-09 | 2021-06-29 | G.C. Laser Systems, Inc. | Laser ablation devices that utilize beam profiling assemblies to clean and process surfaces |
DE112014007214B4 (de) * | 2014-11-28 | 2019-04-11 | Han's Laser Technology Industry Group Co., Ltd. | Optische linsen zur laserbeschriftung |
EP3104306B2 (fr) * | 2015-06-11 | 2023-11-01 | Scantrust SA | Code à barres bidimensionnel |
EP3424026A4 (fr) * | 2016-03-04 | 2019-11-06 | Datalogic USA, Inc. | Dispositif et système de balayage par le bas à grande vitesse de codes à barres |
US10713663B2 (en) * | 2016-03-29 | 2020-07-14 | Authentix, Inc. | Product authentication using barcode characteristics |
-
2019
- 2019-01-07 FR FR1900129A patent/FR3091612B1/fr active Active
-
2020
- 2020-01-06 EP EP20706559.0A patent/EP3908979A1/fr active Pending
- 2020-01-06 WO PCT/FR2020/050013 patent/WO2020144425A1/fr unknown
- 2020-01-06 US US17/420,625 patent/US11907784B2/en active Active
- 2020-01-06 BR BR112021013353-4A patent/BR112021013353A2/pt unknown
Also Published As
Publication number | Publication date |
---|---|
BR112021013353A2 (pt) | 2021-09-14 |
WO2020144425A1 (fr) | 2020-07-16 |
US20220108142A1 (en) | 2022-04-07 |
FR3091612A1 (fr) | 2020-07-10 |
US11907784B2 (en) | 2024-02-20 |
FR3091612B1 (fr) | 2021-01-29 |
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