Auto-locating Tire Pressure Monitoring Sensor Using ABS Data Correlation
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Solution Overview
Problem
Current tire pressure monitoring systems face challenges in automatically locating TPM sensors on vehicle wheels, especially during tire rotation or replacement, as they require manual identification and do not efficiently utilize wheel phase and speed data for precise positioning.
Innovation Solution
The system correlates wheel phase and speed data with wheel phase angle information to automatically identify and locate TPM sensors, using ABS data and RF transmissions to determine the specific wheel position, allowing for accurate assignment of sensor parameters and integration with antilock brake systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual identification methods are used for TPM sensor location, then system complexity is reduced, but productivity and ease of operation deteriorate due to time-consuming manual intervention
Solution Approach 1:
The system enables automatic self-location of TPM sensors by having sensors transmit their own identification data and having the controller automatically correlate this data with wheel position information from ABS sensors, eliminating the need for manual identification procedures
Solution Approach 2:
The system integrates multiple functions into existing components: the ABS sensors serve dual purposes for both brake control and wheel position identification, while the TPM sensor system simultaneously monitors pressure and provides location identification, reducing overall system complexity
2Measurement precision
If wheel phase and speed data is utilized for auto-location, then measurement precision and reliability improve, but device complexity increases due to additional data processing requirements
Solution Approach 1:
The controller acts as an intermediary that receives wheel position information from ABS sensors and correlates it with TPM sensor identification data, automatically matching sensors to specific wheel locations without requiring complex manual procedures
Solution Approach 2:
The system uses feedback from wheel phase angle and speed data to continuously verify and update sensor locations, ensuring accurate identification even during tire rotations or replacements
3Ease of operation
If automatic auto-location system is implemented, then ease of operation improves, but loss of information increases due to potential data correlation errors
Solution Approach 1:
The system replaces manual mechanical identification procedures with electronic data correlation, where the controller automatically matches TPM sensor IDs with wheel positions using electronic signals from ABS sensors, eliminating human error in the process
Data Source
AI summary
Auto-location systems and methods of tire pressure monitoring sensor units arranged with a wheel of a vehicle detect a predetermined time (T1) when a wheel phase angle reaches angle of interest using a rim mounted or a tire mounted sensor. The systems and methods transmit a radio frequency message associated with a wheel phase angle indication. The wheel phase angle indication triggers wheel phase and/or speed data such as ABS data at the predetermined time (T1) to be stored. A correlation algorithm is executed to identify the specific location of a wheel based on the wheel phase and/or speed data at the predetermined time (T1). TPM sensor parameters from a tire pressure monitoring sensor unit are assigned to the specific location of the wheel.