• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Radio frequency transponder (1, 5) corresponding to the assembly, without a mechano-electrical connection, of a radiating antenna (10) and an electronic part (20, 30). The radiating antenna (10) is a single-stranded coil spring forming a dipole antenna. The electronic part (20, 30) is composed of an electronic chip (22, 32) and a primary antenna (24, 34), inductively coupled to the radiating antenna (10), encapsulated in a rigid and insulating mass electrically (29, 39).
    公开号:FR3037200A1
    申请号:FR1555048
    申请日:2015-06-03
    公开日:2016-12-09
    发明作者:Julien Destraves
    申请人:Michelin Recherche et Technique SA Switzerland ；Compagnie Generale des Etablissements Michelin SCA；Michelin Recherche et Technique SA France；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION [0001] The present invention relates to an electronic radio identification device or radio frequency transponder capable of being fixed on an object to be identified, which, particularly in service, undergoes high thermo-mechanical stresses such as a tire. . BACKGROUND [0002] For the field of RFID (Radio Frequency Identification) identification devices, radio frequency transponders are conventionally used for the identification, tracking and management of objects. These devices allow automated management more reliable and faster. These radio frequency transponders generally consist of at least one electronic chip and an antenna formed by a magnetic loop or a radiating antenna that is fixed to the object to be identified. [0004] The communication performance of the radio frequency transponder is expressed by the maximum communication distance of the radio frequency transponder with a radio frequency reader for the same signal communicated to or by the radio frequency reader. [0005] In the case of highly extensible products such as tires for example, there is a need to identify the product throughout its existence from its manufacture until its withdrawal from the market and, in particular, during its use. . Then, in order to facilitate this task, especially in the use condition, a high communication performance is required which is expressed by the possibility of interrogating the long-distance radio frequency transponder of the product, several meters, via a radio frequency reader. Finally, it is desired that the manufacturing cost of such a device is as competitive as possible. It is known in the state of the art, in particular from WO 2009/134243 A1, a radio frequency transponder adapted to meet the needs of 3037200 - 2 - tires. This transponder consists of an electronic chip, a printed circuit on which an electronic chip is electrically connected and two metal coil springs connected mechanically and electrically to the printed circuit forming a dipole radiating antenna. Communication with the radio frequency reader uses radio waves and in particular the UHF band, an acronym for Ultra High Frequencies. As a result, the characteristics of the coil springs such as the wire diameter, the nature of the wire, the pitch of the helix and the length of the springs are adjusted to the chosen communication frequency. However, such a radio frequency transponder has drawbacks.
    [0002] Although part of the radio frequency transponder is expandable by the geometry of its antenna, there are areas of mechanical weakness vis-à-vis high levels of stress in service.  In particular, the mechanical connections of the coil springs with the printed circuit are rigid areas which constitute weak points for the endurance of the radio frequency transponder.  In addition, the method of manufacturing such a radio frequency transponder is expensive. Indeed, the attachment of the coil springs on the printed circuit is a delicate operation often manual consisting on the one hand to anchor the end of the three-dimensional helical springs in the planar notch of the printed circuit and on the other hand to electrically connect the coil springs on the tracks of the electronic board.  This latter operation can not be carried out using the conventional methods of the electronics industry.  Finally, it is necessary to make the radio frequency transponder integral with the elastomeric materials constituting the tire.  In particular, the connection between the rigid parts of the transponder and the elastomeric products may require the use of specific adhesion promoters.  The present invention relates to a radio frequency transponder for improving the technical and economic performance of radio frequency transponders used among others in the tire industry.  DESCRIPTION OF THE INVENTION The invention relates to a radio frequency transponder intended to be integrated into an object to be identified made of a highly extensible material such as an elastomer mixture or composition.  This radiofrequency transponder comprises an electronic chip and a radiating antenna communicating with a radio frequency reader, and is characterized in that it is equipped with a primary antenna electrically connected to the electronic chip, in that the primary antenna is coupled inductively. with the radiating antenna and in that the radiating antenna is a single-stranded coil spring constituting an electric dipole.  The object to be identified may be, for example, a tire.  Thus, the absence of any mechanical connection between the radiating antenna and the electronic chip substantially improves the endurance performance of the radio frequency transponder according to an object of the invention relative to the radio frequency transponder of the cited document.  In addition, the radiating antenna, being disconnected from any printed circuit, can be embedded and made integral in a mass of elastomeric mixtures using elastomeric / metal sticky solutions well known to those skilled in the art. without the use of specific adhesion promoter.  This reduces, at the same time, the cost of implementing such a radio frequency transponder in a mass of rubber such as a tire.  Finally, having separated the electronic part of the radio frequency transponder (consisting of the electronic board and the primary antenna) and the radiating antenna, it is possible to independently produce each component and then assemble them together during a step later.  Thus, one can use standard processes of each industry, electronics and telecommunications which reduces the manufacturing costs of such a radio frequency transponder.  Preferably, the primary antenna is a coil having at least one turn, that the turn is circular, square or rectangular.  According to a particular embodiment, the primary antenna, having an axis of symmetry, is circumscribed in a circle whose axis of revolution is parallel to the axis of the primary antenna and whose the diameter is greater than or equal to one third, and preferably half, of the inner diameter of the helical spring of the radiating antenna.  By imposing the relative dimensions of the coil of the primary antenna with respect to the characteristics of the helical spring of the radiating antenna, it is ensured that the distance between the two antennas will be smaller than the diameter of the primary antenna in the antenna. where the primary antenna is located inside the radiating antenna.  Thus, the inductive coupling between the two antennas is optimized and thus the communication performance of the radio frequency transponder in transmission and reception.  According to a preferred embodiment, the axis of revolution of the radiating antenna 10 and the axis of symmetry of the primary antenna are substantially parallel.  Here, the term substantially parallel means that the angle generated by the axial directions of each antenna is less than or equal to 30 degrees.  In this case, the inductive coupling between the two antennas is optimal significantly improving the communication performance of the radio frequency transponder.  [0020] Preferably, the median plane of the coil of the primary antenna is substantially superimposed on the median plane of the helical spring of the radiating antenna.  Here, it is first necessary to define the median plane of the coil and the coil spring.  By definition, it is a fictional plane separating the object into two equal parts.  In our case, this median plane is perpendicular to the axis of symmetry of each antenna and lies at the center of the length of each antenna.  Finally, here it is understood by substantially superimposed that the relative distance between the median planes is less than one-tenth of the length of the radiating antenna.  [0022] Thus, the intensity of the electric current being maximum in the center of a coil, the magnetic field induced by this current is also maximum in the center of the coil, thus ensuring that the inductive coupling between the two antennas is optimal improving. hence the communication performance of the radio frequency transponder.  Preferably, the primary antenna being connected to the terminals of an electronic card comprising the electronic chip, the electrical impedance of the primary antenna 3037200 is adapted to the electrical impedance of the transponder electronic card. radio frequency.  The term electrical impedance of the electronic card, the electrical impedance across the primary antenna which represents the electrical impedance of the electronic card comprising at least one electronic chip and a printed circuit on which the electronic chip is connected to.  By realizing the impedance matching of the primary antenna to that of the electronic card, the radio frequency transponder is optimized to the communication frequency by improving the gain and having a more selective form factor, a band 10. narrower pass, of the electronic card.  Thus the communication performance of the radio frequency transponder is improved for the same amount of energy transmitted to the radio frequency transponder.  This results in particular in an increase in the reading distance of the radio frequency transponder.  For the radiofrequency transponder in the cited document, it is not easy to design the radiating antenna which, on the one hand, must satisfy the impedance matching condition of the electronic part and, on the other hand, must satisfy the electrical resonance condition for the transmission of radio waves.  The impedance matching of the primary antenna is obtained by adjusting at least one of the geometrical characteristics of the coil to at least one turn 20 that represents the primary antenna such as, for example, the diameter of the wire, the material of this wire, the number of turns, the winding diameter.  [0027] The impedance matching of the primary antenna can also be obtained by adding an impedance transformation circuit consisting of additional electronic components between the primary antenna and the electronic circuit, for example, inductance and capacitance based filters and transmission lines.  The impedance matching of the primary antenna can also be obtained by combining the characteristics of the coil of the primary antenna and the characteristics of an impedance transformation circuit.  According to a particular embodiment, the electronic chip and the primary antenna are embedded in a rigid and electrically insulating material such as, for example, high temperature epoxy resin.  The assembly constitutes the electronic part of the radio frequency transponder.  Thus, it stiffens the electronic part comprising the primary antenna and the electronic chip connected to the printed circuit making more reliable the mechanical connections between its components vis-à-vis the thermo mechanical stresses of the object to be identified.  This also allows the industrialization of the electronic part of the radio frequency transponder independently of the radiating antenna or the object to be identified.  In particular, a miniaturization of the electronic component comprising the primary antenna and the electronic chip can be envisaged by using, for example, a coil micro-coil as a primary antenna.  According to a preferred embodiment, the electronic part of the radio frequency transponder is located inside the radiating antenna.  [0033] Thus, the inductive coupling is optimized since, on the one hand, the magnetic field generated by the radiating antenna is maximum and homogeneous inside the coil spring except for its ends.  As a result, the communication performance of the radio frequency transponder is improved in transmission and reception.  According to a particular embodiment, the geometry of the electronic part of the radiofrequency transponder is inscribed in a cylinder whose diameter is less than or equal to the inside diameter of the radiating antenna and whose axis of revolution is parallel or coaxial with respect to the axis of the primary antenna.  The electronic part thus constituted allows in the case where it would be placed inside the radiating antenna to provide optimized pre positioning of the primary antenna relative to the radiating antenna to improve performance. communication in reception / transmission of the radio frequency transponder.  Indeed, it is mechanically ensured that the two antennas are parallel and that the distance between them generates an inductive coupling quality.  According to another preferred embodiment, the electronic portion of the radio frequency transponder is located outside the radiating antenna.  Thus, the inductive coupling is optimized since the magnetic field generated by the primary antenna is maximum and homogeneous inside the coil except for its ends.  The communication performance of the radio frequency transponder is improved in transmission to the radio frequency reader.  In addition, it is easier then to position additional electronic components on the printed circuit including the electronic chip which is found outside the radiating antenna.  According to a particular embodiment, the electronic portion of the radio frequency transponder has a cylindrical cavity adapted to receive the radiating antenna.  And, the diameter of the circle inscribed in the primary antenna is less than three times, preferably twice, the outer diameter of the radiating antenna.  [0039] Thus, when the radiating antenna is placed inside the primary antenna, it is ensured that the inductive coupling between the radiating antenna and the primary antenna is optimal by the relative positioning between the two antennas in terms of distance and parallelism.  According to a particular embodiment, the electronic chip being electrically connected to a printed circuit to form the electronic card, the printed circuit comprises one or more additional passive or active electronic components.  These electronic components may be for example a microprocessor, a memory, a battery, a pressure sensor, a temperature sensor, an accelerometer.  This enriches the functionality of the radio frequency transponder by multiplying the information it provides.  The invention also relates to an identification patch consisting of a radio frequency transponder embedded in a flexible and electrically insulating mass of elastomer mixture.  Here is meant by the term electrically insulating that the electrical conductivity of the elastomer mixture is below the threshold of percolation conductive charges of the mixture.  Thus, there is provided an identification patch which facilitates the establishment of the radio frequency transponder in objects to be identified comprising parts of elastomeric base material.  A usual bonding rubber layer may be used if necessary to secure the identification patch to the object to be identified such as a tire.  The invention also relates to a method of manufacturing the radio frequency transponder which comprises the following steps: a helical spring of dimension adapted to the radio frequency of the radio frequency transponder communication frequency is produced in order to constitute the radio frequency transponder. radiating antenna of the radio frequency transponder, - an electronic chip is electrically connected to a printed circuit in order to constitute an electronic card, - a coil is produced, having at least one turn whose diameter is greater than or equal to one third, preferably half of the inner diameter of the radiating antenna, in order to constitute a primary antenna, - the primary antenna is electrically connected to the electronic card, - the primary antenna and the electronic card are embedded in a rigid and electrically insulating mass such as a thermosetting resin to constitute the electronic part of the radiofr transponder In this case, the electronic part and the radiating antenna are positioned by simple threading so that, since the primary antenna has an axis of symmetry and a median plane and the radiating antenna has an axis of revolution and a median plane, the The axes of the two antennas are substantially parallel and the median planes of the two antennas are substantially superimposed.  Thus, the manufacture of the radio frequency transponder is simplified by separately realizing the electronic part and the radiating antenna of the radiofrequency transponder.  In addition, the step of assembling the two components requires no mechanical or electrical connection between the two components which drastically reduces the manufacturing costs of the radio frequency transponder.  Preferably, before electrically connecting the primary antenna to the electronic card, the electrical impedance of the coil of the primary antenna is matched to the electrical impedance of the electronic card.  This improves the efficiency of the primary antenna.  The invention also relates to a method of manufacturing the identification patch in which a radio frequency transponder is incorporated in a flexible and electrically insulating mass consisting of two elastomer mixture plates.  Thus, whatever the state of the elastomer, whether raw or crosslinked, it is easy to incorporate the identification patch into an object to be identified, such as a tire, comprising elastomeric products by employing, if necessary conventional elastomer / elastomer adhesion techniques.  This incorporation can take place either during the manufacturing phase of the object, such as for example in a green tire blank, and in particular before the crosslinking or the vulcanization of the elastomers or during a step posterior to the manufacturing process of the object to be identified, for example directly on the inner or outer faces of the tire.  Brief Description of the Drawings [0051] The invention will be better understood on reading the following description in the case of an application to pneumatic tires.  This application is given solely by way of example and with reference to the appended figures in which: FIG. 1 shows a detail view of a radiating antenna according to the invention; FIG. 2 shows a perspective view of the electronic part of a radio frequency transponder according to the invention in a configuration in which the electronic part is intended to be positioned inside the radiating antenna; FIG. 3 shows a perspective view of a radio frequency transponder according to the invention in a configuration in which the electronic part is situated inside the radiating antenna; - Figure 4 shows a perspective view of a radio frequency transponder 5 according to the invention in a configuration where the electronic part is located outside the radiating antenna; FIG. 5 is an exploded view of an identification patch; FIG. 6 presents a graph of the electrical power transmitted to two radio frequency transponders according to the frequency band of observation, and FIG. 7 is a block diagram of a method of manufacturing an identification patch comprising a transponder. radio frequency according to the invention.  DETAILED DESCRIPTION OF EMBODIMENTS In the following, the terms "pneumatic" and "pneumatic tire" are used equivalently and relate to any type of pneumatic or non-pneumatic tire (in English "tire", "pneumatic tire"). Figure 1 shows a radiating antenna 10 consisting of a steel wire 12 which has been plastically deformed to form a helical spring having an axis of revolution 11.  The coil spring is defined firstly by a winding diameter of the coated wire and a pitch of a helix.  Thus, the inner and outer diameters 13 of the coil spring are accurately determined by counting the diameter of the wire.  The length of the spring 17 here corresponds to the half-wavelength of the transmission signal of the radio frequency transponder 1 in an elastomer mixture mass.  Thus one can define a median plane 19 to the coil spring 25 perpendicular to the axis of revolution 11 separating the radiating antenna into two equal parts.  FIG. 2 shows the electronic part 20 of a radio frequency transponder 1 intended for a configuration in which the electronic part 20 is located inside the radiating antenna 10.  The electronic part 20 comprises an electronic chip 22 and a primary antenna 24 electrically connected to the electronic chip 22 via a printed circuit board 26.  The primary antenna is constituted by a micro-coil CMS (acronym for surface-mounted component) having an axis of symmetry 23.  The median plane 21 of the primary antenna defined by a normal parallel to the axis of symmetry 23 of the CMS coil is determined and separates the coil into two equal parts.  The electrical connection between the components on the printed circuit is carried out using copper tracks terminated by copper pellets 27.  The electrical connection of the components on the printed circuit is carried out by means of the so-called "wire bonding" technique by gold wires 28 between the component and the pellets 27.  The assembly consisting of the printed circuit 26, the electronic chip 22 of the primary antenna 24 is embedded in a rigid mass 29 of electrically insulating high temperature epoxy resin constituting the electronic part 20 of the radio frequency transponder 1.  FIG. 3 shows a radio frequency transponder 1 in a configuration where the electronic part 20 is located inside the radiating antenna 10.  The geometric shape of the electronic portion 10 is circumscribed in a cylinder whose diameter is less than or equal to the inner diameter 13 of the coil spring.  The threading of the electronic part 20 in the radiating antenna 10 is facilitated.  The median plane 21 of the primary antenna is substantially superimposed on the median plane 19 of the radiating antenna 10.  FIG. 4 shows a radiofrequency transponder 5 in a configuration where the electronic part 30 is outside the radiating antenna 10.  The geometrical shape of the electronic part 30 has a cylindrical cavity 35 whose diameter is greater than or equal to the outside diameter 15 of the radiating antenna 10.  The threading of the radiating antenna 10 into the cylindrical cavity 35 of the electronic part is thereby facilitated.  The median plane of the primary antenna is substantially in the median plane of the radiating antenna 10.  FIG. 5 presents an identification patch 2 comprising a radio frequency transponder 1 embedded in a flexible mass 3 made of electrically insulating elastomeric material represented by the plates 3a and 3b.  Here the radio frequency transponder 1 is in a configuration where the electronic part 20 is located inside the radiating antenna 10.  FIG. 6 is a graph of the electrical power transmitted by a radio frequency transponder located inside a Michelin XINCITY brand tire envelope of dimension 275/70 822. 5 to a radio frequency reader.  The measurement protocol used is ISO / IEC 18046-3 entitled "Electromagnetic Field Threshold and Frequency Peaks".  The measurements were made for a wide frequency sweep and not punctually as usual.  The x-axis represents the frequency of the communication signal.  The ordinate axis is the electrical power received by the radiofrequency reader expressed in decibel relative to the maximum electrical power transmitted by a current radio frequency transponder of the state of the art.  Dotted curve 100 represents the response of a radio frequency transponder according to the document cited.  The continuous curve 200 represents the response of a transponder according to the invention for the same signal emitted by the radio frequency reader.  There is a gain of two decibels in favor of the radio frequency transponder according to the invention on the central communication frequency of the radiofrequency reader.  The gain remains of the order of at least one decibel over an enlarged frequency band around the communication frequency.  Figure 7 is a block diagram of the method of manufacturing an identification patch 2 according to the invention.  Obtaining the identification patch 2 requires the initial manufacture of a radio frequency transponder 1, 5 according to the invention.  The various chronological steps in the manufacture of the radio frequency transponder 1, 5 and those of the identification patch 2 are identified.  The steps related to the telecommunication or electronics trades are clearly delineated from those of the assembly which can be carried out by the tire manufacturer for example for application on pneumatic tires.  Based on Figure 7 showing a block diagram of an identification patch 2, there are three independent and successive phases.  In a first phase, corresponding to the telecommunications profession, the radiating antenna 10 is formed which will ensure the transmission and reception of the radio waves with the radiofrequency reader.  According to a specific embodiment, the first step consists in plastically deforming the steel wire 12 with an external diameter of 200 microns to form a helical spring using suitable industrial means such as a winding tower. Springs.  This gives a continuous spring whose outer diameter is of the order of 1.2 millimeters which is small vis-à-vis the length 17 of the final radiating antenna between 40 to 60 millimeters that is desired for example 50 millimeters.  A heat treatment may be applied after this plastic deformation step, heating above 200 ° Celsius for at least 30 minutes, in order to relax the prestresses in the helical spring thus formed.  The second step is to cut the helical spring by laser cutting to the desired length corresponding to the half wavelength of the frequency of the radio communication signals taking into account the speed of propagation of these waves in a medium. elastomer, about 50 millimeters.  The mechanical part thus obtained represents the radiating antenna 10 according to the invention.  In a second phase, the electronic part 20 of the radio frequency transponder 1 is realized, which will interrogate and answer the electronic chip 22 to the radiating antenna 10.  The transmission of information between the radiating antenna 10 and the electronic part 20 is performed by inductive coupling using a primary antenna 24.  This electronic device, encapsulated in the rigid mass 29, is composed on the one hand of an electronic chip 22 and on the other hand of a primary antenna 24.  A first embodiment of this electronic device is shown in FIG. 3 in the configuration where the electronic part 20 is intended to be located inside the radiating antenna 10.  In a preferred embodiment, the leadframe method is used in terms of electromechanical support to the primary antenna 24 and to the electronic chip 22 representing the equivalent of a printed circuit 3037200 - 14 - 26.  This method is particularly well suited in this configuration because of its ease of miniaturization.  The first step is to compose the electronic card.  For this purpose, the electronic chip 22 is first fixed on the grid or leadframe by means of a conductive adhesive, for example the H2OE of the Tedella brand.  And the wiring of the chip is performed by the wire-bonding technique, that is to say the realization of an electrical bridge via, for example, gold wire 28 with a diameter of 20 microns between the electronic chip 22 and the printed circuit 26 represented by the grid.  It is then possible to measure the electrical impedance of the electronic board at the attachment points of 1 () the primary antenna 24 on the gate with the aid of a suitable electrical apparatus such as an impedance meter.  The second step consists in producing the primary antenna 24.  In an embodiment not shown in the appended figures, this antenna will consist of a coil with circular turns built directly on the grid (lead frame) by wire-bonding technology.  For this, a gold wire of 20 micrometer diameter will be used, one could also use aluminum wire or palladium copper, to achieve the half-turns of the coil on the reverse side of the grid.  The diameter of the half turn is 400 micrometers, using the conventional ultrasound technique in the semiconductor industry to electrically connect the gold wires to the grid.  Then on the front side of the grid, the other half turn is made to obtain a cylindrical coil with 15 turns of diameter 400 micrometers.  The number of turns of the primary antenna 24 is determined in such a way that the electrical impedance of the primary antenna 24 is adapted to the electrical impedance of the electronic card comprising at least the printed circuit 26 represented by the 25 grid and the electronic chip 22.  In our case, the electrical impedance of the electronic chip 22 alone is a complex number having a value of eg (10-150) ohms.  Thus a coil of 15 turns of diameter 400 micrometers corresponds to a good adaptation of the electrical impedance of the electronic card built on a grid of copper connections.  The last step of producing the electronic part 20 consists in encapsulating the printed circuit 26, the components connected to it and the primary antenna 24 using a high temperature epoxy resin, in which a rigid mass 29.  For this, we use the globtop technology well known to a person skilled in the art.  The rigid mass 29 forms a capsule protecting the electronic card of the radio frequency transponder 1.  In a second embodiment of the electronic part 30 when it is intended to be located outside the radiating antenna 10, the procedure is as follows.  First of all, a part of the electronic card is produced.  In a first step, the conventional ultrasonic technology of the microelectronics industry is connected to a flexible support constituting the printed circuit 36, an electronic chip 32 and possibly additional components so that to compose the electronic card.  The electrical impedance of the electronic card is measured by means of a suitable electrical equipment 15 such as an impedance meter at the terminals of the copper connections on the top face of the flexible printed circuit where the primary antenna will be connected.  Each of the copper connections has a central cavity passing through the thickness of the flexible support to the underside of the support.  In a second step, the primary antenna 34 is made around a tube 37 of electrically insulating resin whose inner diameter, delimiting the cylindrical cavity 35 of the electronic part, is greater than or equal to the external diameter 15 of the helical spring of the radiating antenna 10 is of the order of 1.3 millimeters.  The thickness of this tube is about 0.5 millimeters.  Each end of the tube has an extra thickness of 0.5 millimeters constituting a flange 38 of width less than or equal to 0.5 millimeter.  A 200 micron diameter copper wire is wound on the outer face of the tube 37, between the two flanges 38, in order to constitute a given number of turns, which makes it possible to produce a primary antenna 34 in the form of a cylindrical coil having an electrical impedance adapted to the impedance of the electronic card to which it will be electrically connected.  The flexible circuit board 36 of the electronic board made in the first step is fixed on the flanges 38 of the insulating resin tube 37 using a Tedella type H2OE type conductive glue. Beforehand, each of the ends of the copper wire of the primary antenna 34 has been inserted between a rim 38 of the tube 37 and the flexible printed circuit 36, the two parts to be assembled.  Finally, an electrical connection is made by brazing a copper-type conductive metal through the cavity passing through the flexible circuit board 36 at the level of the copper connections.  Thus the electronic device consisting of the electronic card and the primary antenna 34 is made.  In the last step, the electronic device is coated with an electrically insulating rigid mass 39 to a thickness of at least 1 millimeter in order to protect the electronic card and the primary antenna 34 from various chemical aggressions and to protect mechanically the electrical connections.  An injection technique is employed consisting of positioning the electronic device in a mold.  However, in order to preserve the cylindrical cavity 35 of the initial resin tube, a flexible and airtight elastomeric membrane is placed through the cylindrical cavity 35 which is pressurized to seal this cylindrical cavity 35 to the propagation of the protective resin.  The injection under pressure, at a pressure lower than that of the impermeable membrane, in the liquid state of a high temperature epoxy resin, such as RESOLCOAT resin 1060ES7 of the RESOLTECH brand, is carried out.  This method allows a homogeneous diffusion of the resin on the whole of the electronic device with the exception of the cylindrical cavity 35.  After opening the mold and stopping the pressurization of the flexible membrane, the electronic device is extracted still having the cylindrical cavity 35 but this time externally coated with a rigid mass 39 of electrically insulating resin.  The assembly represents the electronic part 30 of the radio frequency transponder 5.  The third phase of the embodiment of the radio frequency transponder 1 or 5 is to assemble the radiating antenna 10 made in the first step to the electronic part 20 or 30 made in the second step.  In a first configuration where the primary antenna 24 is intended to be located inside the radiating antenna 10, the procedure is as follows.  [0080] Firstly, with the aid of a long nose pliers, the electronic part 20 inscribed in a cylinder in the diameter is smaller than or equal to the internal diameter 13 of the radiating antenna 10 produced at the first step, of the order of a millimeter.  The electronic part 20 is inserted inside the radiating antenna 10 by positioning the axis of symmetry 23 of the primary antenna in the direction of the axis of revolution 11 of the radiating antenna 10.  In addition, the electronic part 20 is pushed into the radiating antenna 10 until the median plane 21 of the primary antenna coincides with the median plane 19 of the radiating antenna.  Then the electronic part 20 of the long-nose pliers is released and delicately removes the pliers from the inside of the radiating antenna 10.  Self centering, parallelism of the axes and relative position of the median planes 15 between the radiating antenna 10 and the primary antenna 24, is thus made favorable to an inductive coupling of quality between the two antennas.  The assembly thus constituted represents a radio frequency transponder 1 according to the invention.  In a second configuration where the electronic part 30 is intended to be located outside the radiating antenna 10, the procedure is as follows.  The outside of the electronic part 30 made in the second phase is fixed with the help of, for example, a vise.  The radiating antenna 10 made during the first phase is grasped with a long nose pliers by one of its ends.  The other end of the radiating antenna 10 is then inserted into the cylindrical cavity 35 of the electronic part 30 and the radiating antenna 10 is guided through the cavity using the long nose pliers. cylindrical 35 until the median plane 19 of the radiating antenna 10 coincides with the median plane of the primary antenna 34.  The radiating antenna 10 is then released by opening the ends of the long-nose pliers.  The assembly thus constituted represents a radiofrequency transponder 5 according to the invention.  The last step, once the radiofrequency transponder 1 or 5 is realized, is to obtain an identification patch 2 to facilitate an implementation of the radio frequency transponder 1 or 5 in objects to be identified in part constituted by elastomeric blends.  Whatever the configuration of the radio frequency transponder 1 or 5, the procedure is as follows for this step.  The radio frequency transponder 1 or 5 constituted in the previous step 10 is placed in the center of a flexible mass 3.  As for example illustrated in FIG. 5, the radiofrequency transponder 1 is sandwiched between two plates 3a and 3b of raw elastomer material of dimensions that are a function of that of the radio frequency transponder 1 and a thickness of, for example, between 2 and 5 millimeters.  The longitudinal direction of the plates corresponds to the axis of the radiating antenna 10.  The assembly is located beforehand on the inner face of a metal matrix of a press tool of dimension adapted to the volume of elastomer mass.  Using a metal punch complementary to the matrix, a compression force is applied by means of a press tool, for example a pneumatic uniaxial press, to the assembly in order to form a compact geometry presenting An axis of symmetry, of length for example 60 millimeters, inscribed in a cylinder with a diameter of about 20 millimeters corresponding to an identification patch 2 of the radio frequency transponder 1 or 5 according to the invention.  In a particular embodiment, adhesion promoters well known to those skilled in the art are used between the rigid mass 29, 39 in high temperature epoxy resin encapsulating the electronic part 20, 30 of the radio frequency transponder 1, 5 and the elastomeric mixture of the identification patch 2.  This can improve the endurance of the radio frequency transponder in use.  [0092] Finally, the industrial implementation of a radio frequency transponder 1, 5 according to the invention for an object to be identified such as a tire may be carried out according to at least two embodiments.  In a first preferred embodiment, it suffices to incorporate the radiofrequency transponder 1, 5 or the identification patch 2 in a raw elastomer mixture into the blank of the tire during the preparation of the tire.  The transponder or identification patch 2 is geometrically placed between the various elastomer components of the green tire blank 5.  Ideally, it is placed in a geographical area under acceptable levels of deformation so that the radiating antenna 10 is not plastically deformed.  The blank undergoes the various manufacturing phases of the tire whose autoclave curing vulcanizes the various elastomeric mixtures and making the transponder or identification patch of the pneumatic tire thus produced integral.  The radio frequency transponder 1, 5 is then ready for use.  Another preferred embodiment consists in freezing the elastomeric structure of the identification patch 2 by crosslinking or vulcanization during a step subsequent to the manufacture of the identification patch 2.  The device obtained as a result of this operation is fixed on a reception zone of the tire by a conventional elastomer / elastomer fastening technique known to those skilled in the art, such as, for example, the cold crosslinking adhesion of a tire. layer of gum binding on. the inner rubber of the tire The radio frequency transponder 1, 5 of the tire is then ready for use.
    权利要求:
    Claims (17)
    [0001]
    REVENDICATIONS1. Radio frequency transponder (1, 5) intended to be integrated in an elastomer mixture mass, comprising: - an electronic chip (22, 32), - a radiating antenna (10) communicating with a radio frequency reader, characterized in that said transponder radio frequency (1, 5) further comprises a primary antenna (24, 34) electrically connected to the electronic chip (22, 32), in that the primary antenna (24, 34) is inductively coupled to the radiating antenna (10), and in that the radiating antenna (10) is a dipole antenna consisting of a single-stranded coil spring.
    [0002]
    2. Radio frequency transponder (1, 5) according to claim 1, wherein the primary antenna (24, 34) is a coil having at least one coil.
    [0003]
    3. radio frequency transponder (1, 5) according to claim 2, wherein the primary antenna (24, 34) having an axis of symmetry (23) is circumscribed in a cylinder whose axis of revolution is parallel to the axis of symmetry (23) of the primary antenna (24, 34) and whose diameter is greater than or equal to one third, and preferably one half, of the inner diameter (13) of the helical spring of the radiating antenna (10). ).
    [0004]
    4. Radio Frequency Transponder (1,
    [0005]
    5) according to one of claims 1 to 3, wherein, the primary antenna (24, 34) having an axis of symmetry (23), said axis of symmetry (23) of the primary antenna (24, 34 ) and the axis of revolution (11) of the radiating antenna (10) are substantially parallel. 5. radio frequency transponder (1, 5) according to one of claims 2 to 4, wherein the median plane (21) of the coil of said primary antenna (24, 34) is substantially superimposed on the median plane (19) of helical spring of said radiating antenna (10). 3037200 - 21 -
    [0006]
    The radio frequency transponder (1, 5) according to any one of the preceding claims, wherein, the primary antenna (24, 34) being connected to the terminals of an electronic card comprising said electronic chip (22, 32), The electrical impedance of the primary antenna (24, 34) is adapted to the electrical impedance of the electronic card of said radio frequency transponder (1, 5).
    [0007]
    Radio frequency transponder (1, 5) according to one of Claims 1 to 6, in which the electronic chip (22, 32) and the primary antenna (24, 34) are embedded in a rigid mass (29, 39). and electrically insulating to form the electronic portion (20, 30) of said radio frequency transponder (1, 5).
    [0008]
    8. Radio frequency transponder (1) according to claim 7, wherein the electronic part (20) of said radio frequency transponder (1) is located inside the radiating antenna (10). 15
    [0009]
    9. radio frequency transponder (1) according to claim 8, wherein the geometry of the electronic part (20) of said radio frequency transponder (1) is inscribed in a cylinder whose diameter is less than or equal to the inner diameter (13) of the radiating antenna (10) and whose axis of revolution is parallel or coaxial with respect to the axis of symmetry (23) of the primary antenna (24).
    [0010]
    10. Radio frequency transponder (5) according to claim 7, wherein the electronic part (30) of said radio frequency transponder (5) is located outside the radiating antenna (10). 25
    [0011]
    11. radio frequency transponder (5) according to claim 10, wherein the electronic part (30) of said radio frequency transponder (5) has a cylindrical cavity (35) adapted to receive the radiating antenna (10). 3037200 - 22 -
    [0012]
    The radio frequency transponder (5) according to claim 11, wherein the diameter of the circle inscribed in the primary antenna (34) is less than three times, preferably twice, the outer diameter (15) of the radiating antenna ( 10). 5
    [0013]
    13. radio frequency transponder (1, 5) according to one of claims 1 to 12, wherein, the electronic chip (22, 32) being electrically connected to a printed circuit (26, 36) to form the electronic card, said circuit printed (26, 36) comprises one or more additional passive or active electronic components.
    [0014]
    14. identification patch (2) comprising a radio frequency transponder (1, 5) according to any one of the preceding claims, wherein the radio frequency transponder (1, 5) is embedded in a flexible elastomer mixture (3) and electrically insulating .
    [0015]
    15. A method of manufacturing a radio frequency transponder (1, 5) in which: - a helical spring of dimension adapted to the radio frequency of the radio frequency transponder (1) communication frequency is produced in order to constitute the radiating antenna (10); ) of said radio frequency transponder (1), - an electronic chip (22, 32) is electrically connected to a printed circuit board (26, 36) so as to constitute an electronic card, - a coil is produced, having at least one coil whose diameter is greater than or equal to one-third, preferably one-half, of the inner diameter (13) of the radiating antenna (10), in order to constitute the primary antenna (24, 34), - the primary antenna (24, 34) is electrically connected; , 34) to the electronic card, the primary antenna (24, 34) and the electronic card are embedded in a rigid mass (29, 39) and electrically insulating such as a thermosetting resin to form the electronic part (20, 3). 0) of said radio frequency transponder (1, 5), - the electronic part (20, 30) and the radiating antenna (10) are positioned by simple threading so that the primary antenna (24, 34) having an axis of symmetry (23) and a median plane (21) and the radiating antenna (10) a revolution axis (11) and a median plane (19), the axes of the two antennas are substantially parallel, and the Median planes of the two antennas are substantially superimposed.
    [0016]
    16. A method of manufacturing a radio frequency transponder (1, 5) according to claim 15, wherein before electrically connecting said primary antenna (24, 34) to said electronic card, the electrical impedance of said coil is matched. from said primary antenna (24, 34) to the electrical impedance of said electronic card.
    [0017]
    17. A method of manufacturing an identification patch (2) in which a radiofrequency transponder (1, 5) according to one of claims 1 to 13, is incorporated in a flexible mass (3) and electrically insulating constituted two plates of elastomer mixture.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3304748B1|2021-10-06|Radiofrequency transponder for a tyre
    EP3548314A1|2019-10-09|Pneumatic tyre equipped with an electronic member
    EP3548313A1|2019-10-09|Pneumatic tyre equipped with an electronic member
    EP3574451B1|2021-03-03|Rfid device and method for manufacturing same
    EP2660862B1|2018-12-26|Microelectronic wireless transmission device
    FR2721733A1|1995-12-29|Method for manufacturing a contactless card by overmolding and contactless card obtained by such a method.
    FR3059606A1|2018-06-08|RADIO FREQUENCY COMMUNICATION MODULE FOR TIRES
    EP3548316A1|2019-10-09|Radiofrequency communication module for a tyre
    WO2019186067A1|2019-10-03|Radiofrequency transponder for tyre
    EP3774401A1|2021-02-17|Radio-frequency transponder for tyre
    WO2019186068A1|2019-10-03|Radio-frequency transponder for tyre
    FR2894714A1|2007-06-15|Electronic chip connecting method for e.g. radiofrequency identification tag, involves covering conducting plates and bonding pads by insulating layer for creating capacitive connection between electronic chip and electric circuit
    EP3613076B1|2021-02-24|Radiofrequency transmission/reception device
    EP2293228A1|2011-03-09|Manufacturing method for a device comprising a RFID circuit, corresponding device and module for the realization of the method
    FR3073094A1|2019-05-03|PARAMETER MEASUREMENT SYSTEM OF A MONTE ASSEMBLY
    WO2021058904A1|2021-04-01|Tyre comprising a radiofrequency transponder
    WO2021058903A1|2021-04-01|Tyre comprising a radiofrequency transponder
    CA3098211A1|2019-12-05|Tire casing fitted with a measurement system and method of communication for such an assembly
    WO2021058905A1|2021-04-01|Tyre comprising a radiofrequency transponder
    FR3030087A1|2016-06-17|MODULE FOR MICROCIRCUIT CARDS, MICROCIRCUIT CARDS COMPRISING SUCH A MODULE AND METHOD OF MANUFACTURE
    FR2940697A1|2010-07-02|Label for microchip card i.e. dual interface smart card, has adaptation unit adapting connection zone to two electrical connection configurations so that electronic component is connected to connection zone along one of configurations
    同族专利:
    公开号 | 公开日
    US20180174015A1|2018-06-21|
    WO2016193457A1|2016-12-08|
    FR3037200B1|2017-05-26|
    CN107683214A|2018-02-09|
    CN107683214B|2019-12-13|
    EP3304748B1|2021-10-06|
    US10339435B2|2019-07-02|
    EP3304748A1|2018-04-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5196845A|1988-10-24|1993-03-23|Compagnie Generale Des Etablissements Michelin|Antenna for tire monitoring device|CN110770049A|2017-06-22|2020-02-07|米其林集团总公司|Tyre provided with an electronic unit and suitable for run-on|US7859393B2|2005-04-26|2010-12-28|Sanyo Electric Co., Ltd.|Tire sensor system and tire used for the same|
    KR20080046816A|2006-11-23|2008-05-28|한국타이어 주식회사|Rfid tag structure in tire|
    JP5026618B2|2008-04-29|2012-09-12|ミシュランルシェルシュエテクニークソシエテアノニム|In-plane RFID antenna|
    FR2937284B1|2008-10-20|2010-11-19|Michelin Soc Tech|INSTRUMENT PNEUMATIC AND PNEUMATIC BODY|
    US9070069B2|2010-08-30|2015-06-30|Michelin Recherche Et Technique S.A.|Spring oriented RFID board|
    JP5716891B2|2010-11-10|2015-05-13|横浜ゴム株式会社|Information acquisition device|
    FR2983609B1|2011-12-02|2014-02-07|Michelin Soc Tech|ELECTRONIC ASSEMBLY FOR INTEGRATING IN A TIRE|
    FR3013870B1|2013-11-27|2016-01-01|Michelin & Cie|SYSTEM FOR DYNAMIC READING OF TRANSPONDER DATA|
    FR3013907B1|2013-11-27|2016-01-01|Michelin & Cie|SYSTEM FOR DYNAMIC READING OF TRANSPONDER DATA|
    FR3029832B1|2014-12-15|2017-10-20|Michelin & Cie|SUPPORT INSTALLATION METHOD FOR ELECTRONIC PNEUMATIC MODULE|US20080117027A1|2006-11-16|2008-05-22|Zih Corporation|Systems, methods, and associated rfid antennas for processing a plurality of transponders|
    WO2017013954A1|2015-07-17|2017-01-26|ソニー株式会社|Antenna device and module device|
    FR3041285B1|2015-09-18|2017-10-27|Michelin & Cie|PNEUMATIC HAVING PASSIVE TRANSPONDER AND METHOD FOR COMMUNICATING SUCH PNEUMATIC|
    FR3059606A1|2016-12-05|2018-06-08|Compagnie Generale Des Etablissements Michelin|RADIO FREQUENCY COMMUNICATION MODULE FOR TIRES|
    FR3059607A1|2016-12-05|2018-06-08|Compagnie Generale Des Etablissements Michelin|RADIO FREQUENCY COMMUNICATION MODULE FOR TIRES|
    FR3059604A1|2016-12-05|2018-06-08|Compagnie Generale Des Etablissements Michelin|PNEUMATIC ENVELOPE EQUIPPED WITH AN ELECTRONIC MEMBER|
    FR3059605A1|2016-12-05|2018-06-08|Compagnie Generale Des Etablissements Michelin|PNEUMATIC ENVELOPE EQUIPPED WITH AN ELECTRONIC MEMBER|
    FR3067976B1|2017-06-22|2019-07-26|Compagnie Generale Des Etablissements Michelin|PNEUMATIC ADAPTED FOR FLAT ROLLING EQUIPPED WITH AN ELECTRONIC MEMBER|
    DE102017006450B4|2017-07-07|2019-05-23|Ses Rfid Solutions Gmbh|RFID transponder for contactless communication with plastic housing|
    DE102018200103A1|2018-01-05|2019-07-11|Continental Reifen Deutschland Gmbh|Tire component for a green tire|
    EP3762243A1|2018-03-07|2021-01-13|Compagnie Generale Des Etablissements Michelin|Tyre provided with a radio frequency communication module|
    EP3768529A1|2018-03-20|2021-01-27|Compagnie Generale Des Etablissements Michelin|Heavy goods vehicle pneumatic tyre provided with a radiofrequency communication module|
    EP3768528A1|2018-03-22|2021-01-27|Compagnie Generale Des Etablissements Michelin|Heavy goods vehicle tyre equipped with a radiofrequency communication module|
    EP3774400A1|2018-03-30|2021-02-17|Compagnie Generale Des Etablissements Michelin|Radio-frequency transponder for tyre|
    US20210019590A1|2018-03-30|2021-01-21|Compagnie Generale Des Etablissements Michelin|Radiofrequency transponder for tire|
    EP3774401A1|2018-03-30|2021-02-17|Compagnie Generale Des Etablissements Michelin|Radio-frequency transponder for tyre|
    WO2019220064A2|2018-05-17|2019-11-21|Compagnie Generale Des Etablissements Michelin|Tyre for a heavy goods vehicle, equipped with a radio-frequency communication module|
    EP3793812A2|2018-05-17|2021-03-24|Compagnie Generale Des Etablissements Michelin|Method for producing a tire provided wth a radiofrequency communications module|
    FR3081774B1|2018-05-29|2020-08-07|Michelin & Cie|PNEUMATIC ENCLOSURE EQUIPPED WITH A MEASURING SYSTEM AND COMMUNICATION METHOD OF SUCH ASSEMBLY|
    DE102018209154A1|2018-06-08|2019-12-12|Continental Reifen Deutschland Gmbh|Electromagnetic transmitting and receiving device|
    JP6582105B1|2018-10-03|2019-09-25|Ｔｏｙｏ Ｔｉｒｅ株式会社|Tire manufacturing method|
    IT201900002337A1|2019-02-18|2020-08-18|Bridgestone Europe Nv/Sa|PERFECTED RFID DEVICE FOR TIRES|
    FR3101171A1|2019-09-25|2021-03-26|Compagnie Generale Des Etablissements Michelin|pneumatic EQUIPPED with a radiofrequency transponder|
    FR3101170A1|2019-09-25|2021-03-26|Compagnie Generale Des Etablissements Michelin|pneumatic EQUIPPED with a radiofrequency transponder|
    FR3101019A1|2019-09-25|2021-03-26|Compagnie Generale Des Etablissements Michelin|pneumatic EQUIPPED with a radiofrequency transponder|
    DE102020206803A1|2020-05-29|2021-12-02|Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein|Electrical component for the method of manufacturing the same|
    WO2022006686A1|2020-07-07|2022-01-13|Dätwyler Schweiz Ag|Elastomeric sensor component with an integrated sensor module|
    法律状态:
    2016-06-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-09| PLSC| Publication of the preliminary search report|Effective date: 20161209 |
    2017-06-21| PLFP| Fee payment|Year of fee payment: 3 |
    2018-06-26| PLFP| Fee payment|Year of fee payment: 4 |
    2020-03-13| ST| Notification of lapse|Effective date: 20200206 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1555048A|FR3037200B1|2015-06-03|2015-06-03|RADIOFREQUENCY TRANSPONDER FOR PNEUMATIC|FR1555048A| FR3037200B1|2015-06-03|2015-06-03|RADIOFREQUENCY TRANSPONDER FOR PNEUMATIC|
    PCT/EP2016/062694| WO2016193457A1|2015-06-03|2016-06-03|Radiofrequency transponder for a tyre|
    CN201680032233.7A| CN107683214B|2015-06-03|2016-06-03|Radio frequency transponder for a tyre|
    US15/578,531| US10339435B2|2015-06-03|2016-06-03|Radiofrequency transponder for a tire|
    EP16726612.1A| EP3304748B1|2015-06-03|2016-06-03|Radiofrequency transponder for a tyre|
    [返回顶部]