KR20130110933A - Tire provided with a rfid tag - Google Patents

Abstract

PURPOSE: A tire with an RFID tag is provided to supply a tire which has an RFID attached to the proper position minimizing elements causing the damage of a tag and the falling-off of the recognition rate. CONSTITUTION: A tire with an RFID tag includes an RFID tag (170). The RFID tag (170) minimizes the effect of a bending and stretching motion during the running of the tire, changes the length direction of the RFID tag to the vertical direction of the radial direction of the RFID to be attached to the tire to minimize deformation of the connection direction of a chip (176) and antennas (178,180) which are formed on a film (172) while minimizing the bending and stretching motion during the running of the tire.

Description

Tire provided with a RFID tag {Tire provided with a RFID tag}

The present invention relates to a tire with an RFID tag, and more particularly, to prevent damage or unrecognition of a tire mounting RFID tag due to internal and external interference during tire driving, and to attach tire information to a tire without detaching the RFID tag until the tire life. The present invention relates to a tire with an RFID tag that can be kept in a closed state.

As the Product Liability Law, which stipulates the liability of the manufacturer for damages caused by defects in recent products, has come into effect, an intelligent tire has been developed that can prevent accidents caused by tire punctures in the tire manufacturing industry in advance . In addition, in order to facilitate the management of customers, it is necessary to integrate and manage all the information from the production and distribution of tires to the disposal of tires.

In order to meet such a trend, a technology using an RFID tag that stores various kinds of history information of tires has recently been developed. Typically, an RFID tag attached to a tire includes an antenna for wireless communication with a chip and a reader that stores various pieces of history information of the tire. Unique information of a tire such as a manufacturing date, a manufacturer, a product number, and the like are stored in the chip, as well as all logistics information from a tire production process to a sale are stored and updated. As a result, information from the reader is stored and updated on the chip via the antenna, and information stored in the chip is transmitted to the reader through the antenna.

Therefore, the tire manufacturer can effectively manage the entire logistics information from the tire manufacturing process to the sale and disposal as well as the unique information of the tire.

RFID, however, is influenced by the recognition rate when it is recognized as a reader due to radio interference caused by metal. It is possible to prevent the recognition of the RFID tag mounted on the tire due to the influence of the steel cord and the rim constituted on the tire depending on the tire mounting position and to prevent interference with the equipment when the tire is running and when the tire is removed from the vehicle. The RFID tag may be damaged. Or tube type tires may suffer tire damage due to the RFID tag. Therefore, there is no influence of the tire moving motion at the time of running the RFID tag, and specific specifications are required for the appropriate position to minimize the effect of the steel cord and the rim on the tire.

An object of the present invention for solving the above problems is to prevent damage or unrecognition of the tire mounting RFID tag due to internal and external interference when the tire is running, and the tire information is attached to the tire without detaching the tag until the tire life. The present invention provides a tire having an RFID attached at an appropriate position to maintain the element and to minimize a factor causing damage to a tag or a reduction in recognition rate.

In order to achieve the above object, the present invention provides a tire in which an RFID tag mounted to recognize product information of a tire is installed inside an innerliner, while minimizing the influence of the stretching motion while driving the RFID tag. The RFID tag is a tire attached to the RFID tag, characterized in that the longitudinal direction of the RFID tag is attached in the vertical direction of the tire radius direction so as to minimize the deformation of the connection direction of the chip and antenna formed on the film.

The widthwise central axis of the RFID is disposed between the upper end of the rim and the upper end of the turn-up part.

When the tube is mounted, a flap is installed inside the RFID tag after the RFID tag is attached, and the flap covers the RFID tag.

The RFID tag according to claim 1 or 2, wherein the RFID tag has a heat resistant polymer film long in the longitudinal direction, a first antenna long in the longitudinal direction attached to the upper surface of the polymer film, and a center of the first antenna. Characterized in that it comprises an RFID chip located.

In addition, a closed loop type second antenna connected to the first antenna in parallel with the RFID chip may be installed.

In addition, a thermosetting adhesive is applied to the lower surface of the polymer film.

In addition, the lower surface of the polymer film is characterized in that it has an adhesive rubber layer that is easy to adhere to the inner liner surface. The adhesive rubber layer may be made of the same material as the inner liner.

In addition, the entire upper surface of the polymer film is characterized by being covered with a first mold portion.

The RFID chip and a part of the first antenna may be covered by a second mold part.

In addition, the entire upper surface of the polymer film except for the second mold part may be covered with the first mold part.

The RFID chip and the first antenna may be soldered with a conductive rubber.

According to the present invention, when a tire with a tire-mounted RFID tag for providing information on the history of a tire is mounted on a vehicle and the chip and the antenna of the RIFD tag for tire mounting are damaged by fatigue or the tire- It is possible to prevent the tag from being damaged or unrecognizable, and to keep the RFID tag with the tire information attached to the tire without detaching the tag until the tire life.

1 is a cross-sectional view of a state in which an RFID tag is attached to a general tire.
FIG. 2 is a perspective view of the RFID attached to FIG. 1. FIG.
FIG. 4A illustrates in 3D the RFID tag radiation pattern that appears when the tire of FIG. 1 is simulated using the HFSS (High Frequency Structure Simulator).
4B is an RFID tag radiation pattern on the XY plane of FIG. 4A.
4C is an RFID tag radiation pattern on the XZ plane of FIG. 4A.
5 is a graph showing the results of the rubber flow evaluation.
6 to 9 are cross-sectional views of RFID tags attached according to types of tires.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows the structure of a typical tubeless tire 100. Referring to the drawings, the tire 100 includes an inner liner which is fitted in the outer periphery of the rim and has a skeleton and is filled with an appropriate level of air pressure between the rim and the inner liner, A tread 110 which is joined to the outer circumferential surface of the carcass 130 and is grounded to the road surface and has a predetermined pattern formed on the ground surface; A belt 120 inserted between the casings 130 for restricting the movement of the tread 110 and a belt 120 connected to both sides of the inner liner in a radial direction from the outer periphery of the rim to the tread 110, And a side wall 160 that forms a side wall.

A bead 140 sealing between the inner liner and the rim is formed at the inner end of the carcass 130 so as to prevent the air filled between the inner liner and the rim from leaking and an apte 150 as a triangular rubber filling material Here, the belt 120 and the bead 140 are formed of steel.

RFID tag 170 is attached to the inner liner to prevent damage that may occur in the manufacturing process and logistics process. As shown in FIG. 2, the RFID tag 170 includes a heat resistant polymer film 172 long in the longitudinal direction, a first antenna 178 long in the longitudinal direction attached to an upper surface of the polymer film 172, and It may be composed of an RFID chip 176 located in the center of the first antenna 178. In order to generate a strong signal, a closed loop second antenna 180 connected to the first antenna 178 in parallel with the RFID chip 176 may be additionally provided.

The polymer film 172 has heat resistance and pressure resistance, and is curved

It is preferable to employ | adopt the polyimide film which is a material which has the flexible which is easy to adhere to.

The bottom surface of the polymer film 172 may be applied a thermosetting adhesive that can be attached to the tire life. Alternatively, an adhesion rubber layer 174 may be attached to the lower portion of the polymer film 172 to improve the adhesion with the inner liner rubber. At this time, the adhesive rubber layer 174 may be made of the same material as the rubber forming the inner liner.

The entire upper surface of the polymer film may be covered by the first mold part 182. Silicon, epoxy, or rubber may be used as the first mold part 182. As a result, not only the components of the RFID tag 170 can be protected, but also the deformation energy is absorbed by the first mold part 182 for flexural movement, thereby extending the lifespan of the RFID tag 170. You can increase it.

In addition, the RFID chip 176 is covered with a separate second mold portion 181 in order to more easily correspond to the stretching movement, and the upper surface of the polymer film 172 except for the second mold portion 181. The whole is covered with the first mold part 182. Through this, the bending motion of the first antenna 178 may be prevented from being directly transmitted to the RFID chip 176, thereby significantly increasing the life of the RFID tag 170. Silicon, epoxy, or rubber may be used as the second mold part 181.

Particularly, the most vulnerable part of the torsional motion of the tire is the connection portion between the RFID chip 176 and the first antenna 178. Therefore, in the present invention, the joints 186 and 188 of the leg 184 connecting the RFID chip 176 and the first antenna 178 are soldered with conductive rubber. As a result, the joints 186 and 188 are also insensitive to deformation, so that the resistance against the bending motion can be increased. As such a conductive rubber, a rubber containing silica can be used.

The RFID tag 170 flexes the length of the tire mounting tag in such a way that the deformation of the connection direction between the chip and the antenna formed on the heat resistant polymer film can be minimized while minimizing the influence of the tire flexing motion generated during driving. It is preferable to attach in the vertical direction.

The tire manufacturing process produces semi-finished products, these semi-finished products are collected to make a green case, and only after the vulcanization process, tires are mounted on the vehicle. During vulcanization, tire rubber flow occurs in the mold, forming a tire shape. In the semi-finished state, the RFID tag was attached to the inner liner surface and subjected to the vulcanization process to see if the tire rubber flow could damage the RFID tag. 4 graphically illustrates the results of rubber flow evaluation. It can be seen that the change in the rubber flow in the longitudinal direction is large and the change in the rubber flow in the transverse direction is small from the bead to the end of the belt. That is, when the longitudinal direction of the RFID tag is attached in the longitudinal direction of the tire (outer radius), the elongation rate of the RFID tag is also increased according to the elongation of the rubber, thereby damaging the connection portion between the chip and the antenna of the RFID tag. On the contrary, the rate of change in the lateral rubber flow on the side of the tread is smaller than that on the inner liner surface, and when the RFID tag length direction is attached in the lateral direction (circumferential direction), the elongation rate is smaller than that of other parts. Can be minimized.

Therefore, in order to prevent damage caused by rubber flow during vulcanization after attaching the RFID tag to the green case, it is preferable to attach the RFID tag in the vertical direction of the stretching movement in the transverse direction from the inner liner side surface.

In addition, the RFID tag 170 is preferably attached to a position that can minimize the interference of radio waves due to the metal material in the tire.

Metal material that may be considered in the tire 100 is the bead 140, the belt 120, and the rim on which the tire 100 is mounted is also a metal material. Therefore, it is desirable to attach the RFID tag 170 at a position where the influence of all these metals can be avoided.

4 is a method for finding an optimal position that can be applied to the tire 100 without damaging the RFID tag. The RFID tag radiation pattern appears when a simulation is performed using a high frequency structure simulator (HFSS) that measures the intensity of radio waves. Is shown in 3D. The RFID tag 170 is attached between the lower end of the bead 140 and the lower end of the apex 150 in FIG. In FIG. 4, the z axis is a tangential direction of the tire circumferential direction at the apex end, the x axis is an axis perpendicular to the center of rotation of the tire at the z axis, and the y axis is an axis perpendicular to the tire width direction at the z axis.

In FIG. 3, due to the influence of the metal formed on the tread and the bead, radio waves are not radiated on the Y axis, and the RFID tag radiation value is large in the direction in which the RFID is attached.

Accordingly, in this simulation, when the propagation strength of the tire mounting RFID tag is simulated from the position of the apex 150 having the sufficient distance from the bead and the belt to the end of the belt 120, the propagation characteristics are excellent. I could confirm it. However, in FIG. 4, the influence of the rim is not considered.

Metals prevent radiation emitted from RFID chips. If the RFID tag is located inside an object made of metal, the information of the RFID chip cannot pass through the object to reach the recognition device, or the signal is insignificant and cannot be recognized by the recognition device. This affects the recognition rate of the tire mounting RFID by the belt 120 and the bead 140 including the steel in the tire 100. In addition, when the tire is mounted on the vehicle, it is affected by the rim, and in the case of the tube type tire, the carcass cord is made of steel and is affected by the carcass cord. Therefore, the attachment position of the RFID tag is preferably attached to a position where a sufficient distance from the bead 160 and the belt is secured.

Therefore, in the present invention, as shown in Figures 6 to 8, the attachment position of the RFID tag of various forms is presented. At this time, the attachment position of the RFID tag includes two conditions. The first condition is to attach the longitudinal direction of the RFID tag in the vertical direction of the tire radius, and the second condition is that the widthwise central axis of the RFID is disposed between the upper end of the rim and the upper end of the turn-up part. This makes it possible to reliably emit a signal of RFID from all influences of belts, beads and rims.

In the tire 200 illustrated in FIG. 6, the central axis in the width direction of the RFID tag 270 is positioned above the upper end of the rim 280. The tire 200 is a general tubeless tire. Accordingly, the RFID tag 270 is disposed between the upper end of the rim 280 and the upper end of the turn-up unit 260. At this time, since only the carcass 230 and the apex 250 are located outside the RFID tag 270, the signal of the RFID tag 270 is not affected by the metal component.

In the tire 300 illustrated in FIG. 7, a widthwise central axis of the RFID tag 370 is disposed between the upper end of the rim 280 and the turnup unit 360. The tire 300 is a tubeless tire for high-speed driving, the diameter of the rim 380 is large. Since only the carcass 330 is located outside the RFID tag 370, the signal of the RFID tag 270 is not affected by the metal component.

The tire 400 shown in FIG. 8 is about the size of the diameter of the rim 480 between the rim 280 shown in FIG. 6 and the rim 380 shown in FIG. Similarly, a widthwise central axis of the RFID tag 470 is disposed between the upper end of the rim 480 and the turnup unit 360. Since only the carcass 330 is located outside the RFID tag 470, the signal of the RFID tag 270 is not affected by the metal component.

The tire 500 shown in FIG. 9 is a tube tire having a rim 580 of a size similar to the rim 280 shown in FIG. 5. Thus, a tube (not shown) is mounted inside the tire, and a flap 590 is installed to protect the tube. In this case, the flap 590 may cover the RFID 570 attached to the inner liner to protect the tube from the RFID tag 570 when the tire is running.

While the present invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Of course. It will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosure without departing from the scope of the present invention.

100,200,300,400,500: Tires 110,210,310,410,510: Tread
120,220,320,420,520: Belt 130,230,330,430,530: Carcass
140,240,340,440,540: Beads 150,250,350,450,550: Apex
160,260,360,460,560: Turn-up unit 170,171,270,370,470,570: RFID tag
172: polymer film 174: adhesive rubber layer
176: RFID chip 178: the first antenna
180: second antenna 181: second mold portion
182: first mold portion 184: leg
186,188 junction 280,380,480,580 rim
590: flap

Claims (11)

In a tire in which an RFID tag mounted to recognize product information of a tire is installed inside an inner liner, a deformation of the connection direction between the chip and the antenna formed on the film while minimizing the influence of the stretching motion while driving the RFID tag. Tires with RFID tags, characterized in that the longitudinal direction of the RFID tag attached in the vertical direction of the tire radial direction to minimize the.
The tire with an RFID tag according to claim 1, wherein the widthwise central axis of the RFID is disposed between an upper end of the rim and an upper end of the turn-up part.
The tire with an RFID tag according to claim 1 or 2, wherein when the tube is mounted, a flap is installed inside the RFID tag after the RFID tag is attached, and the flap covers the RFID tag.
The RFID tag according to claim 1 or 2, wherein the RFID tag is located at the center of the first antenna, the heat resistant polymer film elongated in the longitudinal direction, the first antenna elongated in the longitudinal direction attached to the upper surface of the polymer film. A tire with an RFID tag, comprising an RFID chip.
5. The tire with an RFID tag according to claim 4, wherein a closed loop second antenna connected to the first antenna is installed in parallel with the RFID chip.
5. The tire with an RFID tag according to claim 4, wherein a thermosetting adhesive is applied to the lower surface of the polymer film.
5. The tire with an RFID tag according to claim 4, wherein the lower surface of the polymer film has an adhesive rubber layer on the inner liner surface for easy attachment.
5. The tire with an RFID tag according to claim 4, wherein the entire upper surface of the polymer film is covered with the first mold part.
The tire with an RFID tag according to claim 4, wherein a part of the RFID chip and the first antenna is covered by a second mold part.
10. The tire with an RFID tag according to claim 9, wherein the entire upper surface of the polymer film except for the second mold part is covered with the first mold part.
5. The tire with an RFID tag according to claim 4, wherein the RFID chip and the first antenna are soldered with a conductive rubber.

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