Tire Pressure Monitor Sensor Reference Marker Localization
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Solution Overview
Problem
Tire pressure monitoring systems (TPMS) face challenges in efficiently localizing which tire is low on pressure, especially when tire positions change, as existing methods require extensive buffering and time-stamping, increasing complexity and cost.
Innovation Solution
A system that correlates rotation property information from tire pressure monitor sensors with wheel axle rotation data using a reference frame and time trigger, reducing buffer size and processing time by eliminating the need for time-stamping and continuous data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If time-stamping and continuous data storage are used to localize tires, then tire localization accuracy is improved, but buffer size and system complexity increase
Solution Approach 1:
The patent extracts only the essential timing information (time trigger) from the continuous data stream, separating it from the main pressure data transmission. This time trigger serves as a reference marker that enables localization without requiring storage of the entire continuous data stream with timestamps, thereby reducing buffer requirements and system complexity while maintaining localization accuracy
Solution Approach 2:
The system performs preliminary action by sending the time trigger reference marker before the actual pressure data. This allows the central receiver to prepare and correlate data at the correct time points without needing to store and search through continuous timestamped data, reducing both buffer size and processing complexity
2Measurement precision
If time-stamping and continuous data storage are used to localize tires, then tire localization accuracy is improved, but processing time increases
Solution Approach 1:
The patent extracts only the essential timing information (time trigger) from the continuous data stream, separating it from the main pressure data transmission. This time trigger serves as a reference marker that enables localization without requiring storage of the entire continuous timestamped data stream, thereby reducing buffer requirements and system complexity while maintaining localization accuracy
Solution Approach 2:
The system performs preliminary action by sending the time trigger reference marker before the actual pressure data. This allows the central receiver to prepare and correlate data at the correct time points without needing to store and search through continuous timestamped data, reducing both buffer size and processing complexity
3Measurement precision
If extensive buffering is used for tire localization, then tire localization accuracy is improved, but memory requirements and cost increase
Solution Approach 1:
The patent extracts only the essential timing information (time trigger) from the continuous data stream, separating it from the main pressure data transmission. This time trigger serves as a reference marker that enables localization without requiring storage of the entire continuous data stream with timestamps, thereby reducing buffer requirements and system complexity while maintaining localization accuracy
Solution Approach 2:
The system performs preliminary action by sending the time trigger reference marker before the actual pressure data. This allows the central receiver to prepare and correlate data at the correct time points without needing to store and search through continuous timestamped data, reducing both buffer size and processing complexity
Data Source
AI summary
A tire pressure monitor sensor is disclosed. The sensor includes a wireless transmitter and a processing unit. The processing unit provides a time trigger signal within a measurement period and triggers a wireless transmission of a reference signal indicating an occurrence of the time trigger signal to a remote unit. The tire pressure monitor sensor is configured to derive, based on a plurality of acceleration measurement samples within the measurement period, information indicting at least one rotation property of a tire. The tire pressure monitor sensor is further configured to wirelessly transmit the derived information to a remote unit separate from the reference signal.