Tread-Embedded Wireless Tire Tag Layout for Strain Durability
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Solution Overview
Problem
Pneumatic tires with wireless tags face issues of durability due to strain in sidewall portions during load application, leading to potential damage over time.
Innovation Solution
A pneumatic tire design with a reinforcing layer outward of the carcass and a wireless tag inward of the carcass, where the wireless tag's longitudinal direction intersects all reinforcing cords, enhancing both communication and durability performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless tag is disposed in the sidewall portion to improve tag readability, then communication performance is improved, but durability deteriorates due to strain during load application
Solution Approach 1:
The patent divides the tire into distinct functional zones: the wireless tag is placed in the tread portion (low strain area) while the sidewall portion maintains its structural role. This spatial segmentation allows the tag to avoid strain damage while remaining readable, resolving the contradiction between communication performance and durability.
Solution Approach 2:
The patent applies different structural characteristics to different parts of the tire. The tread portion where the tag is located has different strain characteristics compared to the sidewall portion. By positioning the tag in the tread portion where strain is minimized, the local quality of that region protects the tag while maintaining overall tire functionality.
2Duration of action of stationary object
If the wireless tag is disposed in the tread portion to reduce strain, then durability is improved, but communication performance may deteriorate
Solution Approach 1:
The patent specifies that the antenna portion should be helically wound around the electronic component body, creating a dynamic three-dimensional structure. This helical configuration maintains effective antenna geometry even when the tag experiences minor deformations in the tread portion, ensuring communication performance is maintained while benefiting from the durability of the low-strain location.
Data Source
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AI summary
A pneumatic tire 1 includes a tread portion 2, a pair of bead portions 4, a carcass 6 extending on and between the pair of bead portions 4, a reinforcing layer 7 disposed outward of the carcass 6 in a tire radial direction in the tread portion 2, and a wireless tag 8 disposed inward of the carcass 6 in the tire radial direction in the tread portion 2. The reinforcing layer 7 includes at least one reinforcing ply 7A in which reinforcing cords 7a are arranged. The wireless tag 8 includes an electronic component body 9 that defines a longitudinal direction D, and an antenna portion 10 helically wound around the electronic component body 9 along the longitudinal direction D. The longitudinal direction D of the wireless tag 8 intersects all of the reinforcing cords 7a.