Tire Tread Depth Estimation via Radial Acceleration
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Solution Overview
Problem
Existing methods for determining vehicle tire tread depth are inefficient and lack accuracy, leading to suboptimal monitoring and maintenance.
Innovation Solution
A method utilizing an acceleration sensor integrated into the tire to measure radial acceleration at defined intervals, analyzing the acceleration profile to estimate tread depth, and using mathematical equations to correlate mileage with tread wear, with optional processing outside the vehicle and machine learning for enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous measurement is performed, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
The sensor performs measurements at defined, regular intervals rather than continuously. The control unit activates the sensor to record acceleration values only at specific time points during tire rotation, reducing energy consumption while maintaining sufficient measurement precision for tread depth determination.
2Use of energy by moving object
If measurements are taken at defined intervals, then energy consumption is reduced, but measurement precision deteriorates
Solution Approach 1:
The system determines tread depth by comparing acceleration measurements with reference values stored in a database. The control unit uses feedback from the measured acceleration values and their comparison with expected values to accurately determine tread depth even with interval-based sampling, compensating for the reduced measurement frequency.
Solution Approach 2:
Reference acceleration values for different tread depths are pre-calculated and stored in a database before actual measurements begin. This preliminary preparation allows the system to accurately determine tread depth by comparing interval measurements against pre-established reference data, maintaining precision without continuous measurement.
3Measurement precision
If complex algorithms are used for analysis, then tread depth determination accuracy is improved, but device complexity increases
Solution Approach 1:
A database of reference acceleration values serves as an intermediary between the simple acceleration sensor and the tread depth determination. The database stores pre-calculated reference values that bridge the gap between raw acceleration measurements and accurate tread depth values, simplifying the processing required in the control unit while maintaining high determination accuracy.
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
Enables simple, automated, and accurate estimation of tread depth, allowing for timely warnings when minimum values are reached, reducing energy consumption and improving maintenance efficiency.
Implementation Method 1
The sensor is used to measure radial acceleration as the vehicle tire enters and exits the contact patch
Data Source
Figure 1~2
Figure 3
AI summary
A method is proposed comprising the following steps: a) providing a vehicle tire (1) with a sensor arranged in the vehicle tire (1) for measuring radial accelerations (a), b) continuously measuring the radial accelerations (a) at the vehicle tire during driving, c) determining a constant acceleration value (6) during driving, d) determining a mileage for the vehicle tire (1) with the constant acceleration value (6), e) estimating a remaining tread depth (TD) as a function of the mileage achieved by the vehicle tire (1).