TPMS Signal Strength Analysis for Noise vs Sensor Faults
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Solution Overview
Problem
The existing tire pressure monitoring systems (TPMS) cannot distinguish between system failures caused by external noise interference and actual sensor malfunctions, leading to unnecessary warnings and potential misconceptions about frequent failures.
Innovation Solution
A system that includes a pressure sensor, a reception unit to measure radio signal strength, and a determination unit to differentiate between noise-induced failures and actual sensor abnormalities by comparing average signal strengths over predetermined time periods, with a control unit capable of switching communication methods to Bluetooth for accurate data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reception unit fails to receive a signal for a certain period of time, then the system determines a failure state and warns the cluster, but this causes inability to distinguish between system failure and temporary communication failure caused by external noise
Solution Approach 1:
The patent introduces a determination unit as an intermediary component that analyzes the characteristics of received signals before passing them to the cluster. This determination unit examines signal strength and communication patterns to distinguish between genuine sensor failures and temporary interruptions caused by external noise, thereby preserving information about the nature of the failure without requiring changes to the basic failure detection mechanism
Solution Approach 2:
The patent segments the failure detection process into multiple independent analysis stages: signal reception, signal strength measurement, determination of failure type, and cluster warning. This segmentation allows each stage to perform its specific function independently, enabling the system to provide detailed failure information to the cluster rather than a single undifferentiated failure warning
2Reliability
If the system warns of failure state upon signal loss, then failure detection is achieved, but this leads to misconception on the part of drivers that the TPMS has frequent failures
Solution Approach 1:
The patent implements a feedback mechanism where the determination unit continuously monitors communication status and provides differentiated feedback to the cluster based on the nature of the interruption. When external noise causes temporary signal loss, the system provides feedback indicating noise interference rather than sensor failure, giving drivers accurate information about the situation and reducing unnecessary concern about actual TPMS malfunctions
Data Source
AI summary
A system for determining abnormalities of a TPMS that includes a pressure sensor that senses a pressure inside a tire and transmits sensed pressure data as a radio signal, a reception unit that receives the radio signal from the pressure sensor and measures strength of the received radio signal, and a determination unit that determines an abnormality of the TPMS based on the radio signal received, and the strength of the radio signal measured, by the reception unit.