RFID TPMS Signal Reception for Low-Power Sensor ID Recognition
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Solution Overview
Problem
Existing tire pressure monitoring systems (TPMS) face challenges in reducing power consumption in sensors and efficiently recognizing sensor identification (ID) information, especially when the sensor position changes, such as during tire replacement or movement.
Innovation Solution
The proposed solution involves an apparatus and method using a radio frequency identification (RFID) tag and reader to transmit and receive tire condition information, where the RFID reader is controlled by a first controller that manages power supply and is integrated with an electro-mechanical brake (EMB). This setup allows for efficient power management and immediate ID recognition without the need for manual relearning or lengthy travel times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor wirelessly transmits detected pressure information to the receiver, then the tire pressure monitoring function is achieved, but the power consumption of the sensor increases
Solution Approach 1:
The sensor transmits pressure information periodically based on predetermined time intervals or when pressure changes exceed a threshold, rather than continuously transmitting. This periodic transmission approach maintains effective tire pressure monitoring while significantly reducing the sensor's power consumption compared to continuous transmission modes.
2Use of energy by moving object
If the sensor transmits signal only when vehicle travels above predetermined speed or with lengthened transmission intervals, then power consumption is reduced, but the response time and monitoring accuracy deteriorate
Solution Approach 1:
The system incorporates feedback mechanisms where the sensor monitors pressure changes and transmits signals when predetermined pressure change thresholds are exceeded. This feedback-based triggering ensures that critical pressure changes are detected and communicated promptly, maintaining monitoring accuracy while avoiding unnecessary transmissions that would consume power during stable pressure conditions.
3Reliability
If manual ID entry or automatic relearning procedure is used when sensor position changes, then the sensor ID can be recognized, but the operation complexity and time required increase
Solution Approach 1:
The system automatically performs sensor ID recognition and registration without requiring manual intervention. When a sensor is installed or its position changes, the receiver automatically detects and learns the sensor's ID through wireless communication, eliminating the need for operators to manually enter IDs or use wireless inspection devices, thereby simplifying operations while ensuring reliable ID recognition.
4Measurement precision
If automatic relearning of sensor ID is performed every time vehicle travels, then accurate ID recognition can be achieved, but the system complexity and power consumption increase
Solution Approach 1:
The system performs sensor ID recognition and registration in advance during initial sensor installation or when position changes are detected, rather than continuously relearning during every vehicle travel. This preliminary action approach ensures accurate ID recognition is achieved when needed, while avoiding the unnecessary complexity and power consumption of continuous relearning operations during normal vehicle operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces battery consumption in TPMS sensors, extends their lifespan, and allows for immediate recognition of sensor ID information, eliminating the need for manual relearning and reducing travel time requirements.
Implementation Method 1
a radio frequency identification (RFID) tag configured to transmit tire condition information; a radio frequency identification (RFID) reader configured to receive the tire condition information
Data Source
AI summary
An apparatus for receiving a tire pressure monitoring signal includes a radio frequency identification (RFID) tag configured to transmit tire condition information; a radio frequency identification (RFID) reader configured to receive the tire condition information; and a first controller configured to communicate with the radio frequency identification (RFID) reader and to control power supplied to the radio frequency identification (RFID) reader, wherein the first controller is configured to control an electro-mechanical brake (EMB).