Pneumatic Tire Sensor Patch Integration
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Solution Overview
Problem
Existing pneumatic tire technologies face challenges in integrating sensors due to friction heat and vibration during high-speed rotation, leading to sensor detachment and uneven wear, with existing solutions causing pressure imbalances and complicating the vulcanization process.
Innovation Solution
A pneumatic tire with a sensor patch integrated into the inner liner, featuring a sensor groove that expands to accommodate a detachable sensor module, which is fixed using an adhesive, and formed from materials matching the tire's composition to prevent damage and ensure even pressure distribution during vulcanization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor is installed inside a rotating tire, then real-time tire condition monitoring is achieved, but the sensor is easily detached due to friction heat and vibration
Solution Approach 1:
The sensor module is nested within a sensor groove formed in the sensor patch, which is itself integrated into the inner liner. This nested structure protects the sensor from direct exposure to friction heat and vibration while maintaining secure retention during tire rotation.
Solution Approach 2:
The sensor patch acts as an intermediary layer between the sensor module and the inner liner. This intermediary structure provides thermal and mechanical isolation, protecting the sensor from harmful effects while ensuring stable installation.
2Ease of manufacture
If a thin RFID sensor is disposed between the outer circumference and inner liner during vulcanization, then sensor integration is achieved, but the sensor may be damaged due to exposure to high temperature
Solution Approach 1:
The sensor groove is pre-formed in the sensor patch before the sensor module is installed. This preliminary structure provides immediate protection during the vulcanization process, eliminating the need for high-temperature exposure of the sensor itself while maintaining integration ease.
3Reliability
If a patch with large thickness is vulcanized into the inner liner to prevent sensor separation, then sensor retention is improved, but the pressure of the bladder is exerted locally non-uniformly causing uneven wear
Solution Approach 1:
Instead of using a uniformly thick patch, the invention forms a sensor groove within the sensor patch, creating local variation in thickness. This local quality change allows the patch to retain the sensor securely while maintaining uniform pressure distribution across the contact area, preventing uneven wear.
4Ease of operation
If the sensor is attached to the bead side to facilitate installation, then ease of installation is improved, but the sensor may be damaged at the time of installing or uninstalling the tire
Solution Approach 1:
The sensor module is nested within the sensor groove, which is integrated into the inner liner away from the bead side. This nested positioning protects the sensor from damage during tire installation and removal while maintaining ease of installation through the integrated structure.
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 allows for a securely bound sensor patch that prevents pressure imbalances and facilitates easy sensor replacement, enhancing tire quality and reducing the risk of uneven wear while maintaining energy efficiency.
Implementation Method 1
The sensor hole is expanded when the sensor module is inserted, and is restored after the sensor module has been inserted
Implementation Method 2
the patch is vulcanized into the inner liner
Data Source
AI summary
A tire equipped with a sensor patch includes a sensor module and a sensor patch. The sensor patch is formed integrally with the inner liner of the tire by being vulcanized into the inner circumferential surface, and an accommodation space is formed in a region so that the sensor module can be fixed therein. A sensor patch is integrated with the inner liner without damaging the inner liner, and thus the sensor patch can be strongly bound to the tire. Furthermore, since the sensor patch is formed to have a thickness smaller than the thickness of the inner liner, when the sensor patch is vulcanized into the inner liner, the pressure of the bladder being exerted locally non-uniformly on the inner liner can be prevented.