Pneumatic tyre equipped with an electronic member

Abstract

A pneumatic tyre equipped with a radiofrequency transponder and comprising a crown, two sidewalls and two beads, each bead comprising at least one annular bead wire that rotates about a reference axis, at least one annular carcass ply, coaxial to the reference axis, anchored in the beads, separating the pneumatic tyre into two areas, inside and outside the carcass ply, and the radiofrequency transponder comprising at least an electronic chip and a radiating radiocommunication antenna and being arranged radially externally relative to said bead wire, characterised in that the radiofrequency transponder comprises a primary antenna electrically connected to the electronic chip, in that the primary antenna is electromagnetically coupled to the radiating antenna and in that the radiating antenna consists of a single-strand coil spring defining a first longitudinal axis.

Description

technical field [0001] The invention relates to a casing equipped with an electronic unit that communicates with radio frequency equipment located outside the casing. Background technique [0002] The development of electronic units integrated into mounting components, including tires and wheels, has intensified over the past few years. In particular, these electronic units, such as radio frequency transponders or RFID (Radio Frequency Identification) tags, contain information about the mounted components, such as the identifier of the casing, its characteristic dimensions, etc., in the management and storage of said articles This information is key data. In addition, these electronic units are also able to measure parameters of the mounting assembly, such as the temperature in the cavity formed by the casing and the rim in the inflated state of the mounting. These parameters are essential for the safe use of the installation components. In particular, in order to communi...

AI Technical Summary

Problems solved by technology

Integrating such an electronic unit into the casing structure poses a certain number of challenges

Firstly, the insertion of electronic units into the structure of the tire may lead to degradation of the casing; it is therefore necessary to ensure that the casing maintains its physical integrity throughout its life cycle

The second challenge concerns the radio communication performance of the electronic unit

However, the determined position, although corresponding to an optimal compromise, is not optimal in terms of radio communication due to the constraints of the structural integrity of the electronic unit subject to the thermomechanical stresses generated by the running of the tires

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