Vehicle Wheel Position Localization via Rotation Angle Alignment
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Solution Overview
Problem
Existing tire information systems face challenges in accurately determining the installation position of vehicle wheels due to the lack of explicit association between received transmission signals and wheel positions, which is crucial for error detection and vehicle safety.
Innovation Solution
A method and apparatus that utilize wheel electronics to determine a first rotation angle position and send corresponding information, combined with rotation speed sensors to ascertain second rotation angle positions, allowing for alignment and determination of the installation position by evaluating the distribution of these angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If wheel electronics transmit identifier information in transmission signals, then the wheel-specific identification is improved, but the explicit association between transmission signal and wheel installation position remains insufficient
Solution Approach 1:
The patent introduces a reference system (vehicle body or central evaluation device) as an intermediary to establish the connection between wheel-specific identifiers and installation positions. The reference system provides a coordinate framework that mediates the transformation from wheel-relative positioning to vehicle-relative positioning, enabling explicit association between transmission signals and wheel installation positions.
Solution Approach 2:
The patent replaces direct mechanical or physical association methods with signal-processing-based localization. Instead of relying on physical markers or mechanical linkages, the system uses electronic transmission signals containing identifier information, which are then processed by the central evaluation device to determine installation positions, achieving higher precision without mechanical complexity.
2Reliability
If wheel electronics continuously transmit data, then the reliability of tire pressure monitoring is improved, but the power consumption increases
Solution Approach 1:
The patent implements periodic transmission of data by wheel electronics at predetermined time intervals rather than continuous transmission. This periodic action maintains adequate monitoring reliability by regularly updating tire pressure information while significantly reducing power consumption compared to continuous transmission, achieving an optimal balance between reliability and energy efficiency.
3Use of energy by moving object
If the system uses sporadic radio transmissions to reduce power consumption, then the energy efficiency is improved, but the convergence time for localization increases
Solution Approach 1:
The patent applies preliminary action by having wheel electronics determine and store their rotation angle positions in advance before transmission occurs. This pre-positioning of angular data allows the central evaluation device to quickly calculate installation positions even when transmissions are sporadic, thereby reducing the localization convergence time despite infrequent communication events.
Solution Approach 2:
The patent replaces time-intensive continuous measurement and transmission systems with an efficient signal-processing approach. By using predetermined time intervals for transmission combined with stored rotation angle information, the system achieves rapid localization convergence through computational efficiency rather than continuous data streaming, reducing both power consumption and localization time.
Data Source
AI summary
A method locates an installation position of vehicles wheels in a motor vehicle having at least one vehicle wheel containing a wheel electronics unit. The method includes: determining from the wheel electronics unit a first rotational angle position of the vehicle wheel associated with the wheel electronics unit; transmitting a transmission signal with a first piece of rotational angle information dependent on the determined first rotational angle position; determining from the vehicle second rotational angle positions of the vehicle wheels, and depending thereon, providing second rotational angle information. The first rotational angle information is compared with the second rotational angle information. The installation position of the vehicle wheel associated with the wheel electronics unit is determined depending on the comparison. A device is provided for performing the method.