Tire Bead Transponder Layout for Low-Stress RF Communication

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Solution Overview

Problem

Existing integration methods for transponders in pneumatic tires fail to minimize stress and deformation, leading to detachment and RF communication disturbances.

Innovation Solution

Integrate a transponder within the interior of the tire, specifically between the sidewall and the bead filler, protected by a sleeve of rubber strips, maintaining its position and minimizing deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the transponder is glued onto the internal or external surface of the sidewall, then the design is simple and applicable to existing tires, but the transponder detaches following cyclical deformations

Engineering Contradiction:

Improvedesign simplicityVSAvoidtransponder attachment reliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The transponder is integrated within the bead filler structure, merging the transponder housing function with the bead filler component. This integration ensures the transponder moves with the tire structure during cyclical deformations, eliminating detachment issues while maintaining manufacturing simplicity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The transponder is nested within the bead filler, with the bead filler acting as a protective housing. This nested arrangement allows the transponder to be protected from deformation stresses while remaining integrated with the tire structure, solving both the attachment reliability and manufacturing ease requirements.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If the transponder is integrated into the bead structure at various positions, then the transponder is protected from detachment, but stress and deformation during construction and use cannot be minimized

Engineering Contradiction:

Improvetransponder attachment reliabilityVSAvoidtransponder stress and deformation

Core Design Contradiction:

ReliabilityVSStress or pressure

Solution Approach 1:

The bead filler structure provides localized protection and stress distribution around the transponder. By positioning the transponder within the bead filler and using the filler's material properties, stress is distributed over a larger area, minimizing deformation on the transponder while maintaining secure attachment.

Inventive Principle:

Principle #3Local quality

3Reliability

If the transponder is integrated into the bead structure, then detachment is prevented, but radio frequency communication disturbances and interference occur

Engineering Contradiction:

Improvetransponder attachment reliabilityVSAvoidRF communication disturbances

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The transponder antenna is extracted from direct contact with metallic bead wire structures. By positioning the antenna within the rubber matrix of the bead filler rather than adjacent to metallic components, RF communication pathways are cleared of interference sources, eliminating disturbances while maintaining secure integration.

Inventive Principle:

Principle #2Taking out (Extraction)

4Ease of manufacture

If the transponder is placed radially inside the body ply or at the bead, then integration is achieved, but stresses and deformations during tire construction and use are not minimized

Engineering Contradiction:

Improveintegration feasibilityVSAvoidtransponder stress and deformation

Core Design Contradiction:

Ease of manufactureVSStress or pressure

Solution Approach 1:

The bead filler structure serves as a cushioning element that absorbs and distributes stresses before they reach the transponder. The rubber material of the bead filler provides elastic deformation capacity, protecting the transponder from high-stress regions during tire construction and use while maintaining easy integration.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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

Reduces stress and deformation on the transponder, enhances RF communication range, and maintains tire performance and durability.

Implementation Method 1

a transponder (that is, an electronic device suitable for communicating in radio frequency) which permits remote communication

Methodology Applied

Scientific EffectRadio frequency electromagnetic radiation: Electromagnetic Induction

Data Source

PatentUS12459308B2Pneumatic tire equipped with a transponder

Publication Date: 2025.11.04 BRIDGESTONE EURO NV SA

AI summary

A pneumatic tire includes: a body ply partially collapsed onto itself and therefore having two lateral flaps, in each of which an edge of the body ply rests against an intermediate portion of the body ply itself; two annular beads, each of which is surrounded by the body ply and comprises a bead core and a bead filler; an annular tread; a pair of sidewalls arranged axially externally to the body ply and extending radially inward from the tread; a pair of abrasion gum strips arranged at the beads axially externally to the body ply, and extending radially inward from the sidewalls; and a transponder axially arranged in an interior of one of the two flaps and located radially more to the inside of the edge of the body ply, wherein a radial distance greater than 7 mm is provided between the transponder and the edge of the body ply.