Tire Strain Sensor Housing With Hollow Space for Sensitivity
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Solution Overview
Problem
Existing physical quantity detecting devices for tires face sensitivity issues due to the deformation of strain sensors being restrained by the casing, leading to reduced sensitivity in detecting tire strain.
Innovation Solution
A strain detecting element is fixed to a base member, which is held by a holding member with a hollow space closer to the tire's center, allowing for improved sensitivity by minimizing deformation restraint and ensuring accurate strain detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the strain sensor is attached to the bottom surface of the casing, then the device structure is simplified, but the sensitivity of the strain sensor lowers due to deformation restraint by the casing
Solution Approach 1:
The invention extracts the strain detecting element from direct attachment to the casing and relocates it to a holding member that is separately attachable to the tire inner surface. This separation allows the strain detecting element to operate independently without the restraining influence of the casing structure, thereby maintaining detection sensitivity while preserving structural simplicity.
Solution Approach 2:
The holding member serves as an intermediary component between the tire and the strain detecting element. It transmits tire deformation to the strain detecting element while isolating the sensor from direct contact with the casing, thus preventing deformation restraint and maintaining high sensitivity in strain measurement.
2Measurement precision
If the strain sensor is directly attached to the tire inner surface, then detection sensitivity is maximized, but the sensor becomes vulnerable to damage and lacks protection
Solution Approach 1:
The strain detecting element is nested within the holding member structure, which provides a protective environment. The holding member encloses and protects the sensitive strain detecting element while maintaining its ability to detect tire strain, thus improving reliability without compromising detection sensitivity.
Solution Approach 2:
The holding member structure provides beforehand cushioning and protection for the strain detecting element against potential damages from the harsh tire environment. This protective structure ensures the sensor's durability and reliable operation while maintaining its sensitivity to tire deformation.
3Strength
If a rigid casing is used to protect electronic parts, then structural strength is improved, but the strain sensor's deformation is restrained leading to reduced sensitivity
Solution Approach 1:
The invention segments the device into distinct functional components: a protective casing for electronic parts and a separate holding member for the strain detecting element. This segmentation allows the casing to provide structural strength while the holding member independently manages strain detection without restraint, resolving the contradiction between protection and sensitivity.
Solution Approach 2:
The strain detecting element is extracted from the casing structure and placed in a separate holding member. This extraction eliminates the restraining effect of the rigid casing on sensor deformation while the casing continues to provide necessary structural protection for electronic 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 device accurately senses tire strain with high sensitivity and durability, reducing detection errors and maintaining consistent deformation transmission to the strain detecting element.
Implementation Method 1
a strain sensor that detects strain of the tire
Data Source
AI summary
Provided are a strain detecting element 6a, a base member 6b to which the strain detecting element 6a is fixed, and a holding member 7 that internally holds the base member 6b and has a bottom surface 7a attachable to an inner surface T1 of a tire T. The holding member 7 has a hollow space 7i located on the side closer to the center of the tire T relative to the strain detecting element 6a.