Tire RFID Tag Insulation via Boron Nitride Rubber
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Solution Overview
Problem
The integration of RFID systems into tires faces challenges due to boundary formation between different rubber compositions, leading to initial cracking and reduced recognition distances, which affects durability, safety, and logistics management.
Innovation Solution
A tire design incorporating a rubber patch with a topping rubber composition that includes raw material rubber and boron nitride, positioned outside the bead filler, to suppress boundary formation and enhance insulating properties, thereby increasing recognition distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber composition with high dynamic modulus and low permittivity (including unsaturated rubber and silica) is used to cover the RFID tag, then shielding and insulation effects are obtained, but a boundary forms between rubbers due to significant composition difference from nearby rubbers, causing initial cracking
Solution Approach 1:
The patent changes the composition parameters of the rubber material by replacing silica with carbon black. This substitution maintains the required shielding and insulation properties while achieving compositional similarity to adjacent rubber layers, thereby preventing boundary formation and initial cracking.
Solution Approach 2:
The patent applies a rubber composition that is homogeneous with the adjacent rubber layers in the tire structure. By using carbon black instead of silica, the rubber composition becomes more similar to the surrounding rubber, eliminating the boundary effect and ensuring uniform mechanical properties across the interface.
2Length of stationary object
If the recognition distance of RFID tag is increased by using high-performance chips, then management of logistics and history becomes more advantageous, but cost increases significantly
Solution Approach 1:
The patent uses a cost-effective approach by selecting a standard RFID chip configuration rather than high-performance expensive chips. The recognition distance is extended not by upgrading the chip but by optimizing the antenna length and rubber composition, thereby achieving the desired performance at lower cost.
Solution Approach 2:
The patent extends the recognition distance by changing physical parameters of the RFID system components, specifically increasing the antenna length and optimizing the rubber composition for better electromagnetic properties, rather than upgrading to more expensive high-performance chips.
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 solution effectively reduces the likelihood of initial cracking, enhances durability and safety, and increases the recognition distance of the RFID system, facilitating better management of tire distribution and history.
Implementation Method 1
insulating properties of the rubber covering the RFID system are enhanced to increase a recognition distance of the RFID system
Data Source
AI summary
A tire includes a radio frequency identification (RFID) system and a rubber patch including a topping rubber topping the RFID system, wherein the topping rubber includes a raw material rubber and a reinforcing filler including a boron nitride. In the tire including a RFID system, since the RFID system is covered with a rubber similar to a nearby rubber, generation of a boundary therebetween is suppressed to lower a possibility of the occurrence of initial cracking at a portion where the RFID system is applied, thus increasing durability and safety, and since insulating properties of the rubber covering the RFID system are enhanced, a recognition distance of the RFID system is increased to further facilitate management of distribution and history.