Tire RFID Tag Layout for Uniformity and Readability
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Solution Overview
Problem
The uniformity of tires is compromised by unevenly arranged joint portions, and the presence of RFID tags can disturb data readability due to their weight and proximity to metal reinforcing components, particularly when placed near joint portions.
Innovation Solution
The RFID tag is strategically positioned in specific angular ranges relative to the rotation axis of the tire, dispersed from the joint portions of the inner liner and metal reinforcing components, ensuring optimal placement that enhances readability while minimizing the impact on tire uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the RFID tag is placed near the joint portion of a metal reinforcing component, then the weight distribution is simplified, but the readability of the RFID tag is disturbed
Solution Approach 1:
The patent applies local quality by specifying different placement zones for the RFID tag based on its radial position relative to the tire center. When the RFID tag is placed in the radial inner half, it should be within 45 degrees from the joint portion; when in the radial outer half, it should be within 45 degrees from the joint portion. This localized quality control ensures optimal readability while maintaining simple placement procedures.
2Ease of manufacture
If the joint portions are unevenly arranged, then the manufacturing process is simplified, but the uniformity of the tire is decreased
Solution Approach 1:
The patent applies preliminary action by pre-defining the angular position range for the RFID tag relative to the joint portion before actual placement. The specification establishes that the RFID tag should be placed within a predetermined angular range (45 degrees) from the joint portion, which is determined in advance during tire manufacturing. This preliminary positioning ensures uniform tire composition while maintaining manufacturing simplicity.
3Measurement precision
If the RFID tag is placed at a position far from joint portions, then the readability is improved, but the placement constraints increase
Solution Approach 1:
The patent applies parameter changes by utilizing the radial position parameter (inner half vs. outer half of the tire) to determine the appropriate angular placement range for the RFID tag. This parameter-based approach allows the system to achieve good readability (by positioning away from metal components) while maintaining simple placement constraints (by providing clear angular guidelines relative to the joint portion). The parameter change from radial position to angular position resolves the contradiction between readability and placement simplicity.
Data Source
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AI summary
A tire 2 includes a plurality of joined components and an RFID tag 54. The plurality of joined components include an inner liner forming an inner surface of the tire 2, and at least one metal reinforcing component including a steel cord. A joint portion of the inner liner, a joint portion of the metal reinforcing component, and the RFID tag 54 are placed so as to be dispersed in a circumferential direction. Positions of the joint portions of the joined components and a position of the RFID tag 54 are represented by angles about a rotation axis of the tire 2, and when the position Ji of the joint portion of the inner liner is defined as 0 degrees, the joint portion of the metal reinforcing component is located in a range of not less than 90 degrees and not greater than 270 degrees (Jc, Js), and the RFID tag 54 is located in a range of not less than 60 degrees and not greater than 90 degrees or a range of not less than 270 degrees and not greater than 300 degrees.