Tyre RF Transponder Structure for Thermomechanical Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Passive radio frequency transponders integrated into pneumatic envelopes face challenges with physical integrity and communication performance due to severe thermo-mechanical stresses and the rubbery nature of the envelope, which affects the durability and reliability of the transponder.
Innovation Solution
A pneumatic envelope design with a passive radio frequency transponder featuring a main core with low rigidity, conductive wire elements with a diameter between 0.05 and 0.15 millimeters, and an electrical insulation device with a relative dielectric permittivity less than 10, positioned to minimize movement and maximize elastomeric material surrounding the antenna, ensuring robust communication and mechanical endurance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a small diameter conductive wire element is used to connect the electronic chip, then the transponder can be miniaturized and production is simplified, but the physical integrity of the transponder is compromised under severe thermomechanical stresses
Solution Approach 1:
The patent applies composite materials by combining the conductive wire element with an electrical insulation device that has specific dielectric properties (relative dielectric permittivity between 2.0 and 10.0). This composite structure provides both mechanical support to protect the thin conductive wire from breaking under thermomechanical stresses and electrical insulation to maintain radiofrequency performance, resolving the contradiction between miniaturization and physical integrity.
2Reliability
If the transponder is positioned to maximize surrounding elastomeric material for mechanical protection, then physical integrity is improved, but communication distance and performance may be reduced due to signal attenuation
Solution Approach 1:
The patent applies parameter changes by optimizing the relative dielectric permittivity of the electrical insulation device (between 2.0 and 10.0) to minimize signal attenuation. This allows the transponder to be positioned deeper within the pneumatic envelope for mechanical protection while maintaining communication distance, as the controlled dielectric properties reduce electromagnetic signal loss compared to uncontrolled elastomer surroundings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances the physical integrity and communication performance of the transponder by reducing mechanical stress on the conductive wire elements and maintaining radio frequency performance, allowing for reliable operation under demanding conditions.
Implementation Method 1
an electrical insulation device with a relative dielectric permittivity less than 10
Implementation Method 2
passive radio frequency transponders are traditionally used for the identification, tracking, and management of objects
Data Source
Figure 1~1
Figure 2~3
Figure 4
AI summary
The invention relates to a tyre having a transponder, comprising: - a crown which has a crown reinforcement with an axial end at each edge, joined at each of its axial ends to a bead, which has an inner end, by a sidewall; - a carcass reinforcement which is formed of adjacent first wires and is anchored in each bead around a spiral formed by second wires, - the transponder comprising a core defining a first axis, a first cover wire helically wound around the core and an electrical insulation device; - the first cover wire comprising at least two conductive wire elements galvanically connected to an electronic chip comprising a radiofrequency transceiver component, characterized in that the thickness of the elastomer mixture separating the outer cover wire, which is located furthest outwards from the first axis, and the reinforcements is greater than 0.5 millimeter.