Tire with a receiving antenna

• US 20030217797A1
• Filed: 04/01/2003
• Published: 11/27/2003
• Est. Priority Date: 04/02/2002
• Status: Active Grant

• Current Assignee: Michelin Recherche et Technique SA (Compagnie Generale DES Etablissements Michelin SCA)
• Original Assignee: Michelin Recherche et Technique SA (Compagnie Generale DES Etablissements Michelin SCA)
• Inventors: Poulbot, Valery, Thomas, Thierry, Robinet, Antoine
• Granted Patent: US 6,991,013 B2
• Time in Patent Office: Days
• US Class Current: 152/152.1
• CPC Class Codes: B60C 23/0433 Radio signals
• CPC Class Codes: B60C 23/0493 for attachment on the tyre
• CPC Class Codes: G06K 19/04 characterised by the shape
• CPC Class Codes: G06K 19/07764 the adhering arrangement making the record carrier attachable to a tire tire temperature or pressur control arrangements, see B60C23/00
• CPC Class Codes: H01Q 1/2241 used in or for vehicle tyres

Abstract

A tire equipped with at least one receiving antenna (2) of a reception device (1) which includes an electronic device (10) intended to be remote controlled by electromagnetic coupling with at least one transmitting antenna (8). This receiving antenna (2) is intended to be connected to the electronic device (10) and is divided into several loop parts (2.1, 2.2) arranged in a parallel circuit, these loop parts (2.1, 2.2) each having a surface (s1, s2), these surfaces (s1, s2) being juxtaposed so that during rolling of the tire the loop parts (2.1, 2.2) are coupled successively and continuously to the transmitting antenna (8).

Claims

1. A tire having at least one receiving antenna for a receiving device including an electronic device for remote control by electromagnetic coupling with at least one external transmitting antenna, the receiving antenna being intended to be connected to the electronic device, wherein the receiving antenna comprises at least two loop parts arranged in a parallel circuit, each loop part having a surface, and the surfaces being juxtaposed so that the loop parts are couplable successively and continuously about the circumference of the tire to an external transmitting antenna.

2. The tire according to claim 1, wherein the receiving antenna has a useful reception surface which is substantially equal to the sum of the surfaces of the loop parts.

3. The tire according to claim 1, wherein the loop parts are each formed by a conductor, a portion of a conductor of an at least first loop part and a portion of a conductor of an at least second loop part adjacent to the at least first loop part being separated by a space.

4. The tire according to claim 1, wherein the at least two loop parts are separated, at the electronic device, by a space.

5. The tire according to claim 1, further comprising a tuning capacitor connected in parallel with at least one of the at least two loop parts to tune the at least one loop part to the transmitting antenna.

6. The tire according to claim 1, wherein the receiving antenna is secured between two sheets formed of an electrically insulating material to form a complex, wherein the complex is located in the tire.

7. The tire according to claim 6, further comprising, in a crown area of the tire, at least one crown reinforcement surrounded by a tread, wherein the complex is inserted between the crown reinforcement and the tread.

8. The tire according to claim 7, wherein the sheets of the complex are produced from a material having mechanical properties compatible with the tread.

9. The tire according to claim 7, wherein the complex is disposed between the crown reinforcement and a carcass reinforcement of the said tire.

10. The tire according to claim 7, wherein the complex is disposed radially externally relative to the crown reinforcement.

11. The tire according to claim 6, wherein the complex is located in the tire crown, and wherein the tire crown has a belt reinforcement extending axially over a distance L, wherein the each at least two loop parts has a length extending substantially circumferentially and is disposed axially in one of two areas lying between limits situated axially at a distance of L/6 from an axial end of the crown reinforcement and at a distance of L/3 from the axial end of the crown reinforcement.

12. The tire according to claim 6, wherein the complex is disposed between an inner liner and a carcass reinforcement of the tire.

13. The tire according to claim 6, further comprising a carcass covered, on an outside of the tire, with an external sidewall, wherein the complex is inserted between the carcass and the external sidewall.

14. The tire according to claim 6, wherein the sheets are produced from an elastomer containing silica and an amount of carbon black sufficiently small to make the elastomer electrically insulating.

15. The tire according to claim 14, wherein the loop parts are formed of a bare metallic conductor.

16. The tire according to claim 15, wherein the conductor comprises one or more cords.

17. The tire according to claim 15, further comprising reinforcement cords, wherein the conductor comprises at least one cord formed of the same material as the reinforcement cords.

18. The tire according to claim 15, wherein the conductor comprises at least one steel wire brass-coated on the surface.

19. The tire according to claim 15, wherein the conductor is undulated.

20. The tire according to claim 15, wherein the conductor is glued to at least one of the sheets of the complex.

21. The tire according to claim 1, further comprising an electronic device connected to the receiving antenna.

22. The tire according to claim 21, further comprising an electronic circuit which cooperates with the electronic device.

23. The tire according to claim 22, wherein the electronic circuit comprises a single rectifying circuit, the loop parts having at least one end connected to an input of the rectifying circuit, the electronic device being connected to an output of the rectifying circuit.

24. The tire according to claim 22, wherein the electronic circuit comprises a plurality of rectifying circuits, each loop part having at least one end connected to an input of a rectifying circuit, the plurality of rectifying circuits having respective outputs connected in series with the electronic device.

25. The tire according to claim 22, wherein the tire has a crown area, and wherein at least one of the electronic device and the electronic circuit is located in the crown area.

26. The tire according to claim 22, wherein the tire has a sidewall, and wherein at least one of the electronic device and the electronic circuit is located in the sidewall.

27. The tire according to claim 22, wherein the tire defines an internal volume, and wherein at least one of the electronic device and the electronic circuit is located in the internal volume.

28. The tire according to claim 22, wherein the receiving antenna is immobilized between two sheets formed of an electrically insulating material to form a complex, wherein the complex is located in the tire, and wherein at least one of the electronic device and the electronic circuit is located in the complex.

29. The tire according to one of claim 21, wherein the electronic device comprises at least one element selected from the group comprising a sensor, a counter and an electronic label.

30. A method of manufacturing a tire with a receiving antenna, comprising the steps of:

preparing a tire carcass,

preparing a complex including a receiving antenna divided into a plurality of loop parts arranged in a parallel circuit, the receiving antenna being secured between two sheets of an electrically insulating material compatible with the normal materials of the tire,

providing a connection for at least one electronic device intended to be remote controlled by electromagnetic coupling between the receiving antenna and at least one transmitting antenna,

installing the complex on the tire carcass,

covering the complex with an elastomer with a filler and finishing to obtain an uncured tire, and,

molding and vulcanizing the uncured tire.

31. A method according to claim 30, wherein the complex is installed on a crown of the tire carcass and the elastomer with filler forms a tread of the tire.

32. A method according to claim 31, wherein the method further comprises the step of placing at least one crown reinforcement on the carcass before installing the complex.

33. A method according to claim 31, wherein the step of preparing the complex includes preparing at least one extension of the complex and further comprising steps of securing connection conductors on the at least one extension for a connection between the receiving antenna and an electronic device, and folding the extension over a sidewall of the tire after the complex is placed on the crown of the tire carcass.

34. A method according to claims 30, wherein the complex is installed on a sidewall of the tire carcass and the elastomer with filler forms a sidewall of the tire.

35. A method according to claim 34, wherein the step of preparing the complex includes the preparing at least one extension of the complex and the method further comprises the steps of securing connection conductors on the at least one extension for a connection between the receiving antenna and an electronic device, and folding the extension over a crown area of the tire after the complex is placed on the sidewall of the tire carcass.

36. A method according to claim 30, wherein the method further comprises the step of drilling in the carcass a hole opening out in the internal volume defined by the tire, and positioning in the hole connection conductors for the connection between the receiving antenna and an electronic device situated in the internal volume.

37. A method according to claim 36, wherein further comprising the step of plugging the drilled hole containing the conductors from the inside of the tire before curing.

38. A method according to claim 30, wherein the sheets are made from non-vulcanized elastomer material.