Tire Sensor Auto-Location Using Footprint Length and Acceleration
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Solution Overview
Problem
Existing methods for identifying tire sensor locations are time-consuming and prone to user error, and they require manual reassessment when tires and wheels are rotated or moved.
Innovation Solution
The system uses tire patch or footprint length to automatically locate tire sensors to their wheel positions, utilizing a model that correlates footprint length with acceleration coefficients, allowing for real-time identification without user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual identification and data entry is used for each tire and sensor, then tire sensor position can be identified, but the process is time consuming and subject to user error
Solution Approach 1:
The system enables self-service by allowing the vehicle's existing sensor network and motion data to automatically identify tire sensor positions without requiring manual intervention. The tire sensors themselves generate the data needed for their own identification through their interaction with the road surface during vehicle motion.
Solution Approach 2:
The patent replaces the manual mechanical process of identifying and entering tire sensor positions with an automated system that uses motion-based sensor data, vehicle dynamics, and signal processing to automatically determine sensor locations based on their physical interaction with the road.
2Reliability
If manual identification method is used, then tire sensor location can be recorded, but another manual assessment is required when tires and wheels are rotated or moved
Solution Approach 1:
The system implements continuous feedback by monitoring tire sensor data in real-time as tires rotate and move. The automated identification process continuously updates sensor position associations based on current vehicle operation, eliminating the need for manual reassessment after tire rotation.
Solution Approach 2:
The patent applies dynamics by making the tire sensor identification system adaptive and dynamic rather than static. The system automatically adjusts to tire rotations and movements by continuously analyzing motion-based sensor data during normal vehicle operation, maintaining accurate sensor-position associations without manual intervention.
3Productivity
If automated detection using footprint length is implemented, then tire sensor locations can be identified accurately in real-time, but the system complexity increases
Solution Approach 1:
The patent achieves universality by using the vehicle's existing motion sensors, tire pressure monitoring system, and onboard computer infrastructure to perform the additional function of automated tire sensor position identification. The system leverages already-present components and their existing data collection capabilities rather than adding dedicated specialized hardware.
Solution Approach 2:
The system merges the tire sensor position identification function with the vehicle's existing motion sensing and data processing systems. By combining footprint length measurements from tire sensors with vehicle motion data from existing sensors and processing them together through integrated algorithms, the system achieves automated identification without requiring completely separate dedicated systems.
Data Source
AI summary
Aspects of tire sensor auto-location are described. A sensor position detection device receives tire sensor values from a tire sensor device. The tire sensor values are measured or calculated for tire footprint length, longitudinal acceleration, and lateral acceleration. The sensor position detection device generates a longitudinal acceleration coefficient and a lateral acceleration coefficient using these values, and assigns the tire sensor device to a particular tire position of a vehicle based on a sign of the longitudinal acceleration coefficient and a sign of the lateral acceleration coefficient.