Tyre Pressure Monitoring System Context Preservation via Read-Only Memory
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Solution Overview
Problem
Current tire pressure monitoring systems (TPMS) face challenges in preserving the context of electronic units when faults occur, as data in non-volatile random-access memory is rewritten or lost during diagnostic procedures, and secure transmission of context data is restricted due to power consumption and temperature limitations, making it difficult to diagnose faults effectively.
Innovation Solution
A method that writes data from non-volatile random-access memory into read-only memory upon detecting an operating error, ensuring data preservation and secure storage, even when temperature conditions restrict writing, and implementing a timeout to wait for suitable temperature ranges for reliable data transfer, while ceasing radiofrequency transmission to prevent data interception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is written from non-volatile random-access memory into read-only memory upon detecting an operating error, then data preservation and secure storage are improved, but the device complexity increases
Solution Approach 1:
The system performs preliminary actions by continuously maintaining a copy of context data in read-only memory before faults occur. When an error is detected, the data is already preserved and protected, eliminating the need for complex real-time decision-making about data preservation during fault conditions.
Solution Approach 2:
The invention creates a copy of the context data from non-volatile random-access memory into read-only memory. This copying mechanism ensures that critical diagnostic information is preserved in a protected storage medium that cannot be modified, thereby guaranteeing data integrity while simplifying the overall system architecture.
2Reliability
If radiofrequency transmission is ceased to prevent data interception, then security is improved, but the loss of information increases
Solution Approach 1:
The invention extracts the critical context data from the transmission channel and stores it locally in read-only memory within the wheel unit. This extraction eliminates the need to transmit sensitive diagnostic information over radiofrequency channels, thereby preventing interception while preserving all necessary data for later analysis.
Solution Approach 2:
The read-only memory acts as an intermediary storage medium that holds context data locally without requiring transmission to external systems. This intermediary approach allows the data to be preserved and made available for diagnosis while eliminating exposure to potential interception during wireless communication.
3Measurement precision
If data writing is performed at the moment of error occurrence, then measurement precision is improved, but the difficulty of detecting and measuring increases due to temperature constraints
Solution Approach 1:
The system performs preliminary data copying operations during normal operating conditions when temperature parameters are within acceptable ranges. By proactively maintaining updated copies of context data in read-only memory before fault conditions occur, the system ensures data integrity without requiring precise temperature monitoring at the moment of error detection.
Data Source
AI summary
A method for saving in an electronic measurement module of a tire pressure monitoring system for a motor vehicle. According to the method, as soon as a module operating error occurs, the data contained in the non-volatile random-access memory of the electronic data module are written into the read-only memory.