Wheel-Tire Force Sensing for Compact Tire State Estimation
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Solution Overview
Problem
Existing tire state estimation techniques require large-scale devices that can interfere with vehicle travel or necessitate dedicated tire modifications, limiting their practicality and flexibility.
Innovation Solution
A sensor system is disposed between the wheel and tire to detect pressing forces, generating signals that are processed to estimate the state of the rotating body, including the wheel and tire, using a simple configuration that does not require external power and minimizes interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser devices are disposed outside the tire to measure camber angle, then measurement capability is achieved, but device size increases and may interfere with vehicle traveling
Solution Approach 1:
The sensor is nested within the tire structure, specifically disposed between the tire and wheel, allowing measurement functionality to be integrated without increasing external device dimensions. This nesting approach enables camber angle measurement while maintaining compact overall device size and avoiding interference with vehicle traveling.
2Measurement precision
If acceleration sensor is attached to inner liner portion of tire, then load estimation is achieved, but dedicated tire preparation is required
Solution Approach 1:
The sensor system is designed to be universally applicable to standard tires without requiring dedicated tire modifications. By disposing the sensor between the tire and wheel assembly, the system can estimate load using existing tire structures, eliminating the need for specialized tire preparation while maintaining measurement accuracy.
3Device complexity
If sensor is disposed between wheel and tire, then configuration simplicity is achieved, but measurement accuracy may be compromised
Solution Approach 1:
The sensor acts as an intermediary element disposed between the wheel and tire, measuring pressing forces that directly reflect the state of the rotating body. This intermediary positioning enables accurate measurement of camber angle, slip angle, load, and air pressure while maintaining a simple overall configuration, as the sensor captures force information without requiring complex external measurement systems.
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 system accurately estimates tire states such as camber angle, slip angle, load, and air pressure with improved accuracy and reduced complexity, enabling efficient operation without external power supply.
Implementation Method 1
a first sensor that can be disposed between a wheel and a tire mounted on the wheel and outputs a first sensor signal in accordance with a pressing force applied by the wheel and the tire
Data Source
AI summary
An estimation system includes: a first sensor that can be disposed between a wheel and a tire mounted on the wheel and outputs a first sensor signal in accordance with a pressing force applied by the wheel and the tire; and a processor that estimates a state of a rotating body including the wheel and the tire based on the first sensor signal. The processor generates a first section signal by dividing the first sensor signal by a specific section and estimates the state of the rotating body based on the first section signal.