Tire Wear Monitoring Insert Using Asymmetric Locking Geometry
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Solution Overview
Problem
Existing tire wear monitoring systems using LC or LCR circuits face challenges in reliable attachment to tires due to centrifugal forces during rotation, which affects measurement accuracy and can compromise the tire's mechanical properties and air tightness.
Innovation Solution
An LC or LCR circuit insert is designed with a shape that locks into the tire, featuring a larger cross-section deeper inside the tire than near the tread, and is arranged in a blind hole, with adhesive application to ensure secure attachment, allowing the inductive component to be positioned for improved readability and minimizing wear-related displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the LC or LCR circuit is attached to the tread of the tire, then wear measurement is enabled, but centrifugal forces during rotation push the circuit away from the tread, affecting measurement accuracy
Solution Approach 1:
The LC or LCR circuit is nested inside a cavity formed in the tread block, with the circuit completely enclosed within the tread block structure. This nesting approach protects the circuit from centrifugal forces while maintaining its position relative to the tread surface for accurate wear measurement.
Solution Approach 2:
The cavity for receiving the circuit is formed in the tread block before the tire vulcanization process, and the circuit is inserted into this pre-formed cavity. This preliminary preparation ensures the circuit is securely positioned before the tire is put into service, preventing displacement during rotation.
2Reliability
If the LC or LCR circuit is inserted from inside the tire, then attachment reliability is improved, but reinforcement structures must be penetrated, deteriorating mechanical properties and air tightness
Solution Approach 1:
The tread block is segmented to form a cavity that does not penetrate through the entire tire structure. The cavity is confined to the tread block portion, avoiding penetration of reinforcement structures located deeper in the tire, thus preserving mechanical strength and air tightness while providing secure circuit attachment.
3Manufacturing precision
If the LC or LCR circuit is applied during manufacturing, then position control is improved, but attachment to the tread becomes difficult due to vulcanization conditions
Solution Approach 1:
Adhesive is used as an intermediary substance between the circuit and the cavity walls to secure the circuit in place. This adhesive mediator enables reliable attachment during or after vulcanization without requiring direct bonding under extreme manufacturing conditions.
4Stability of the object's composition
If the cross section of the insert is larger deeper inside the tire, then the circuit locks with the tire, but the insert requires a blind hole structure increasing manufacturing complexity
Solution Approach 1:
The cavity structure is designed with asymmetric cross-sectional dimensions - larger at the base deeper inside the tire and smaller near the tread surface. This asymmetric geometry provides mechanical locking that stabilizes the circuit position while the overall structure remains integrated with the tread block without requiring additional complex components.
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 provides a reliable and accurate method for monitoring tire wear by maintaining the circuit's position within the tire, enhancing measurement accuracy while preserving the tire's mechanical integrity and air tightness.
Implementation Method 1
adhesive can be applied to improve the attachment between the insert and the tire
Implementation Method 2
the inductive component is arranged in such a part of the insert that has a large cross section improves the readability of the LC or LCR circuit
Data Source
AI summary
A tire comprising a tread block made of tread material, a tread, of which a part is formed by the tread block, and an insert comprising a primary capacitive component and a primary inductive component. The insert extends in a longitudinal direction from a bottom of the insert to a top of the insert. The insert has a first cross section at a first longitudinal position and a second cross section at a second longitudinal position, wherein the first longitudinal position is located closer to the tread of the tire than the second longitudinal position, and the second cross section is greater than the first cross section. At least a part of the top of the insert does not form an interface with the tread material. A method for applying an insert into a tire. An insert is inserted into a blind hole of the tire such that the bottom of the insert is inserted deeper in the blind hole than the top of the insert.