Tire Sensor Housing With Compressible Insert for Vibration Stability
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Solution Overview
Problem
Direct attachment of electronic sensors to the innerliner of tires is complex and expensive due to material differences and harsh conditions, leading to sensor movement, cracking, and vibration, which reduces sensor life and performance.
Innovation Solution
A tire sensor attachment structure with a compressible body in the sensor housing between the sensor and innerliner, providing a press fit and secure attachment, using a material like double-sided adhesive foam tape with a foam core to prevent movement and ensure accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid or semi-rigid sensor casing is directly mounted to the tire innerliner, then the sensor can continuously sense temperature and pressure inside the tire cavity, but the attachment becomes complex and expensive due to material differences and harsh environmental conditions
Solution Approach 1:
A discrete housing made of elastomeric material is introduced as an intermediary between the rigid sensor casing and the tire innerliner. This housing serves as a mediator that is compatible with both the sensor casing (providing a secure fit) and the tire innerliner (providing easy attachment), thereby simplifying the overall attachment structure while maintaining reliability in the harsh tire environment.
2Ease of manufacture
If the sensor is placed in a discrete housing that is readily adhered to the innerliner, then the attachment process is simplified, but the sensor moves inside the housing during vehicle operation causing impacts against the housing
Solution Approach 1:
A compressible body is placed between the rigid sensor casing and the elastomeric housing to provide beforehand cushioning. This compressible element prevents direct contact and impacts between the sensor casing and housing during vehicle operation, thereby maintaining sensor stability and reliability while preserving the ease of housing attachment to the innerliner.
3Strength
If the sensor casing is rigid to protect the integrated circuit and components, then component integrity is maintained, but repeated impacts cause cracking of the housing and reduce sensor life
Solution Approach 1:
The compressible body acts as a protective cushion placed beforehand between the rigid sensor casing and the elastomeric housing. This cushioning element absorbs and dissipates impact forces during vehicle operation, preventing the transmission of repeated impacts to the housing structure, thereby extending housing life while maintaining the necessary strength of the rigid sensor casing.
4Strength
If the sensor impacts against the housing during operation, then the rigid casing protects components, but vibration is created inside the tire which is undesirable
Solution Approach 1:
The compressible body is positioned beforehand between the rigid sensor casing and the housing to serve as a vibration-damping element. This cushioning structure absorbs impact energy and reduces vibration transmission during sensor contact with the housing, thereby eliminating undesirable vibration inside the tire while maintaining component protection through the rigid casing.
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 stable and secure attachment of sensors, reducing cracking and vibration, thereby increasing sensor life and maintaining accurate tire parameter monitoring.
Implementation Method 1
A compressible body is disposed in the chamber between the sensor and the innerliner
Implementation Method 2
compressible body that is disposed in the chamber between the sensor and the innerliner
Implementation Method 3
using a material like double-sided adhesive foam tape with a foam core to prevent movement
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A tire comprising a tire sensor attachment structure (10) is disclosed. The tire (12) includes a pair of bead areas (16), a sidewall (18) extending from each respective bead area to a tread (20), a carcass (22) extending toroidally between each of the bead areas (16), and an innerliner (24) being disposed radially inwardly of the carcass (22). A housing (38) is attached to the innerliner (24). The housing (38) defines an interior chamber (44). A sensor (30) is disposed in the interior chamber (44). The tire sensor attachment structure (10) comprises a discrete body (50) being formed of a compressible material and being disposed in the interior chamber (44) between the sensor (30) and the innerliner (24).