Embedded Tire Transponder Positioning for Flexure Reduction
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Solution Overview
Problem
Existing tire transponder assemblies face challenges in maintaining transponder integrity and performance during tire manufacturing and service life due to flexure and mechanical stress, particularly when embedded in high-stress regions like the sidewall, which affects read range and durability.
Innovation Solution
Embedding a passive UHF RFID transponder between the barrier layer and ply component in a specific radial range of 15% to 35% of the tire section height, optimizing its orientation perpendicular to the ply cords for structural support and minimizing flexure, and securing it between the ply and barrier layers to reduce energy dissipation and enhance read performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the transponder is embedded in the sidewall region of the tire, then the transponder is easily accessible for reading, but the transponder experiences high flexure and mechanical stress which compromises its durability and performance
Solution Approach 1:
The patent applies local quality by selecting a specific embedding location within the sidewall region that balances accessibility and durability. The transponder is positioned at a depth and lateral location where it remains accessible for reading while avoiding the highest stress concentration zones of the sidewall, thus achieving both ease of operation and reliability
2Reliability
If the transponder is embedded deeper in the tire carcass, then the transponder is protected from mechanical stress and flexure, but the read range and signal strength are reduced
Solution Approach 1:
The patent applies parameter changes by optimizing the embedding depth and lateral position as key parameters. By carefully selecting the depth within the sidewall region and the lateral distance from the tire center, the patent achieves an optimal balance where the transponder is sufficiently protected from mechanical stress while maintaining adequate read range for operational deployment
3Productivity
If the transponder is embedded early in the manufacturing process, then the benefits of tracking are maximized throughout the tire life cycle, but the transponder integrity may be compromised during manufacturing
Solution Approach 1:
The patent applies preliminary action by embedding the transponder during the green tire construction phase, before vulcanization. This timing allows the transponder to be integrated into the tire structure early, enabling tracking throughout the tire life cycle, while the subsequent vulcanization process encapsulates and protects the transponder, maintaining its integrity through manufacturing
4Ease of manufacture
If the transponder is located radially outward from the ply turn-up end, then the embedding process is simplified, but the transponder experiences higher flexure and energy dissipation
Solution Approach 1:
The patent applies local quality by selecting a specific radial position for the transponder embedding location. Rather than placing it at the extreme radially outward position, the patent chooses an optimized radial distance from the ply turn-up end that reduces flexure and energy dissipation while still maintaining manufacturing feasibility, thus achieving both ease of manufacture and reduced energy loss
Data Source
Figure 1~2
Figure 3
Figure 4A
AI summary
A pneumatic tire and tag assembly is disclosed. The assembly comprises a tire carcass formed by a green tire construction, the tire carcass comprising at least one radially inner ply component (84) extending around an annular bead member (76) to a ply turn-up portion, the ply turn-up portion extending radially outward from the bead member (76) to a ply turn-up end (86), the tire carcass further comprising a barrier layer component (80) positioned axially inward from and adjacent to the ply component (84), the barrier layer component (80) not extending around the bead member (76); and an electronic tag device (10) embedded within the tire carcass between the barrier layer component (80) and the ply component (84) in a lower sidewall region between 10 percent and 40 percent of the tire section height (SH) of the tire carcass. Also a respective cured pneumatic tire and a method of constructing the pneumatic tire and tag assembly is disclosed.