TPMS Module Pairing via Centralized Signal Differentiation
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Solution Overview
Problem
Existing methods for pairing measurement modules with wheels in motor vehicles are complex, expensive, and time-consuming, particularly due to the need for acceleration sensors and high processing requirements, making them inefficient and costly.
Innovation Solution
A method where the on-board computer initiates the pairing process by sending measurement signals to each module, measuring differentiation parameters, and repeating transmissions until values stabilize, allowing for efficient pairing without acceleration sensors, using predetermined transmission orders and storing values to associate modules with wheels based on consistent signal patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the localization with synchronized emissions (LSE) method is used with acceleration sensors in each measurement module, then the pairing accuracy and reliability are improved, but the device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the acceleration sensor from the measurement module and relocates the localization function to the central computer. The computer receives orientation signals from ABS wheel speed sensors and actively manages the pairing process, eliminating the need for expensive acceleration sensors in each wheel unit while maintaining pairing accuracy through centralized processing.
Solution Approach 2:
The central computer is given multiple functions: it processes measurement data from TPMS modules, manages the pairing process, receives orientation signals from the ABS system, and performs localization calculations. This multi-functional approach eliminates the need for dedicated acceleration sensors in each wheel unit, reducing overall system complexity.
2Device complexity
If measurement modules transmit signals periodically every 15-20 seconds without acceleration sensors, then the cost and complexity are reduced, but the pairing time and energy consumption increase
Solution Approach 1:
The patent implements a preliminary pairing phase where measurement modules transmit signals at a higher frequency (e.g., every 1-5 seconds) before normal operation. This preliminary action allows the computer to quickly establish associations between modules and wheels, reducing the overall pairing time while maintaining simple module hardware without acceleration sensors.
Solution Approach 2:
The patent uses different periodic transmission rates for different phases: high-frequency periodic transmission during the pairing phase to quickly establish associations, and low-frequency periodic transmission during normal operation to save energy. This multi-rate periodic approach balances pairing speed with energy efficiency.
3Device complexity
If the computer processes signals from multiple wheels simultaneously without initialization, then the system appears simpler, but the pairing reliability decreases due to unsynchronized signals from wheels turning at different speeds
Solution Approach 1:
The patent implements an initialization phase where the computer actively sends requests to measurement modules and receives orientation signals from the ABS system before processing pairing data. This preliminary action synchronizes the reference frames and ensures that signals from wheels turning at different speeds are properly correlated, improving pairing reliability without complicating the overall system structure.
Data Source
AI summary
A method for pairing a measurement module with a wheel of a vehicle including, for each angular orientation signal associated with a specific wheel received by a computer, the steps of transmitting, by the computer, a measurement signal or a request to transmit a measurement signal to each module, measuring, by the computer or each module, a value of at least one parameter differentiating the signal, performing repetitions of the transmissions of measurement signals for each angular orientation signal received by the computer and storing values of the parameter, pairing a specific wheel with a measurement module when the values are substantially constant with a variation of less than 10% for the values, each wheel being associated with a module at the end of the method.