Tire Bead Transponder Layout for Stress-Shielded RFID Tracking
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Solution Overview
Problem
Existing methods for integrating transponders into vehicle tires are prone to damage from material stresses, leading to reliability issues in tire identification and tracking.
Innovation Solution
The transponder is positioned in the tire bead between the carcass ply and the tire inner liner, surrounded by a rubber jacket, with a height dimension of at least 3 mm from the core apex, and aligned with helical antennas in the circumferential direction, providing protection from material stresses and ensuring optimal transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transponder is integrated into the tire during manufacturing, then tire identification capability is enabled, but the transponder is exposed to high material stresses that can destroy it
Solution Approach 1:
The transponder assembly is segmented from the main tire structure by placing it in a dedicated cavity within the bead filler, isolating it from the high-stress regions of the tire while maintaining integration for identification purposes
Solution Approach 2:
The bead filler acts as an intermediary element that provides a protective cavity for the transponder, absorbing and distributing material stresses away from the sensitive electronic component while maintaining structural integrity
2Device complexity
If the transponder is placed closer to the apex for compactness, then tire bead structure is simplified, but the transponder experiences higher material stresses during rolling
Solution Approach 1:
The bead filler is designed with different local properties: a cavity region for transponder placement with lower stress concentration, and outer regions for structural support, allowing the transponder to be positioned optimally without compromising overall bead integrity
3Reliability
If the transponder is positioned deeper in the tire bead, then protection from material stress is improved, but the distance from the apex increases beyond optimal limits
Solution Approach 1:
Instead of positioning the transponder deeper in the radial direction, the solution uses the circumferential dimension by creating a cavity within the bead filler structure, allowing optimal protection distance while maintaining appropriate spatial relationship to the apex
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
This arrangement permanently shields the transponder from high material stresses, enhancing its durability and maintaining optimal communication performance, thus ensuring reliable tire identification and tracking.
Implementation Method 1
RFID stands for Radio Frequency Identification, which means identification using electromagnetic waves
Data Source
Figure 1
Figure 2~3
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AI summary
The invention proceeds from a vehicle tyre (26) having a tread, a tyre belt, a tyre carcass with at least one carcass ply (6), sidewalls (7) and a tyre bead (8) with a tyre core (4) and a bead filler (5), wherein the tyre core (4) comprises, in cross section, a multiplicity of strengthening members, and the bead filler (5) is connected on its underside to the top side of the tyre core (4), wherein the vehicle tyre (26) has a transponder (1).