RFID Tyre Bead Layout for Durability and Signal Spread
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Solution Overview
Problem
Existing methods for embedding RFID devices in tires can lead to premature tire failure due to improper positioning, which compromises durability and communication performance.
Innovation Solution
A pneumatic tire design that positions the RFID transponder between the turned-up portion of the body ply and the sidewall or rim cushion, maintaining a minimum radial distance from adjacent tire components, and optionally surrounded by rubber coating layers, ensuring stability and durability while enhancing radio-frequency signal spread.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the RFID transponder is embedded close to the bead core and body ply end, then the transponder positioning stability is improved, but the tire durability deteriorates due to premature tire failure
Solution Approach 1:
The patent introduces a rim cushion as an intermediary component between the transponder and the bead core/body ply end. The rim cushion absorbs and distributes mechanical stresses, preventing direct contact between the transponder and high-stress regions while maintaining stable positioning. This mediator approach resolves the contradiction by allowing close positioning for stability while protecting against premature failure.
Solution Approach 2:
The rim cushion serves as a pre-positioned protective element that cushions the transponder from mechanical stresses before they can cause damage. By placing this cushioning layer in advance during tire construction, the transponder is protected from high-stress regions that would otherwise cause premature tire failure, thus maintaining both positioning stability and durability.
2Reliability
If the RFID transponder is positioned away from the rim seating, then the tire durability is improved, but the radio-frequency signal spreading deteriorates
Solution Approach 1:
The patent optimizes the transponder positioning parameters by defining specific radial and axial distance ranges from the rim seating. By carefully selecting these parameters (radial distance of 5-15mm, axial distance of 10-20mm), the solution achieves a balance where the transponder is far enough to avoid stress-related failures but close enough to maintain effective radio-frequency signal spreading for RFID communication.
3Manufacturing precision
If the RFID transponder is embedded between body ply end and bead core, then the transponder positioning precision is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-positioning the transponder on the rim cushion before the final tire assembly steps. The transponder is initially placed on the rim cushion at the correct radial and axial positions, then the rim cushion with the pre-positioned transponder is integrated into the tire structure. This preliminary positioning simplifies the overall manufacturing process while maintaining precise transponder placement.
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 proposed tire design maintains tire durability and ensures reliable RFID communication performance even after high mileage, with minimal impact on tire performance and ease of industrial implementation.
Implementation Method 1
Radio-Frequency Identification (RFID) is a technology that uses radio waves to transfer data between a scanner/reader and a tag/chip
Data Source
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AI summary
It is provided a relates to a tyre comprising a RFID device where a transponder (14) having a radially outer end (17) facing the tread (7) and a radially inner end (18) facing the bead core (5) and an axially inner surface facing the body ply (3) and an axially outer surface facing the sidewall (11) or the rim cushion (12) in radial tyre direction is located between the end (15) of the body ply (3) and the bead core (5) and in tyre axial direction is arranged between the turned-up portion (3a) of the body ply (3) and the sidewall (11) or the rim cushion (12), wherein a first radial distance (D1) of more than 3 mm is provided between the radially outer end (17) of the transponder (14) and the end (15) of the body ply (3), and a second radial distance (D2T) of at least 14.1 mm is provided between the radially inner end (18) of the transponder (14) and a radial height (H) corresponding to the radial innermost portion of a rim seating of the tyre. Further is provided a pneumatic tyre and rim assembly.