Pneumatic Tire Transponder Embedding Rigidity Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pneumatic tires with embedded RFID tags face issues of stress concentration and degraded communication performance due to rigidity differences between the covering layer and the rubber members, as well as radio wave blocking by tire components.
Innovation Solution
A pneumatic tire design where the RFID transponder is embedded on the outer side of the carcass layer, covered with a specific covering layer having a storage modulus ratio between 0.1 and 1.5 compared to the surrounding rubber members, and positioned to avoid radio wave obstruction, ensuring appropriate rigidity and communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transponder is embedded in the tire with a covering layer, then the transponder is protected from damage, but stress concentration occurs due to rigidity difference between the covering layer and rubber members, degrading tire durability
Solution Approach 1:
The patent controls the storage modulus ratio between the covering layer and outer rubber members to be within 0.1 to 1.5, optimizing the rigidity balance to prevent stress concentration while protecting the transponder
Solution Approach 2:
The patent uses composite material design where the covering layer is formulated with specific rubber compounds and fillers to achieve the desired storage modulus ratio, combining protection function with stress distribution
2Reliability
If the transponder is disposed on the inner side of the carcass layer, then the transponder is protected from external damage, but radio waves are blocked by tire components, degrading communication performance
Solution Approach 1:
The patent positions the transponder on the outer side of the carcass layer in the tire width direction, changing the spatial dimension of placement to avoid radio wave blocking by steel carcass while maintaining protection through the covering layer
3Strength
If the covering layer has high rigidity to protect the transponder, then the transponder is well protected, but the difference in rigidity with rubber members causes stress concentration, reducing tire durability
Solution Approach 1:
The patent optimizes the storage modulus ratio between the covering layer and outer rubber members to be within 0.1 to 1.5, balancing the rigidity to provide transponder protection while preventing excessive stress concentration that would reduce tire durability
Data Source
AI summary
Provided is a pneumatic tire. A transponder is embedded in an outer side in a tire width direction of a carcass layer, the transponder is covered by a covering layer, and a storage modulus E′c at 20° C. of the covering layer and a storage modulus E′out at 20° C. of a rubber member having the largest storage modulus at 20° C. of rubber members located on an outer side in the tire width direction of the transponder satisfy the relationship 0.1≤E′c/E′out≤1.5. Further, the storage modulus E′c at 20° C. of the covering layer and a storage modulus E′in at 20° C. of a rubber member having the largest storage modulus at 20° C. of rubber members located on an inner side in the tire width direction of the transponder satisfy the relationship 0.03≤E′c/E′in≤1.50.