TPMS Tire Positioning Using Excitation Timing and Signal Strength
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Solution Overview
Problem
Current tire pressure monitoring systems (TPMS) require manual entry of tire pressure sensor IDs, leading to errors and inconvenience during tire replacement or exchange, and cannot perform real-time positioning when the vehicle is stationary.
Innovation Solution
A tire location positioning method using a TPMS receiver and tire pressure sensors that sends excitation signals to differentiate between front and rear wheels, allowing for accurate identification of tire locations without manual ID entry, enabling real-time positioning in both stationary and moving states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual entry of tire pressure sensor IDs is used, then tire location identification can be performed, but errors occur during tire replacement or exchange and convenience is reduced
Solution Approach 1:
The system performs automatic identification of tire pressure sensors without requiring manual ID entry. The control unit automatically detects and identifies each tire pressure sensor based on signal characteristics, eliminating the need for manual operation and reducing errors during tire replacement or exchange.
Solution Approach 2:
The manual mechanical process of entering IDs is replaced by an automatic signal-based identification system. The control unit uses communication signals between the tire pressure sensors and the central monitor to automatically determine tire locations, substituting human operation with automated electronic identification.
2Ease of operation
If positioning is performed based on acceleration, then manual ID entry is not needed, but real-time positioning cannot be performed when the automobile is stationary
Solution Approach 1:
The system changes the identification parameter from acceleration-based to signal characteristic-based. By using unique signal characteristics (such as response time, signal strength, or communication protocol identifiers) of each tire pressure sensor, the system can perform positioning regardless of vehicle motion state, enabling real-time identification even when stationary.
Solution Approach 2:
The system performs preliminary identification of tire pressure sensors by establishing unique signal characteristics for each sensor during system initialization or first operation. This preliminary action enables subsequent automatic positioning without requiring vehicle motion, as the identification data is already stored and can be used immediately.
Data Source
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AI summary
Embodiments of the present invention relate to the field of automotive technologies, and disclose a tire location positioning method and apparatus, a tire pressure monitoring system (TPMS) receiver, a tire pressure sensor, a TPMS and an automobile. The method includes: controlling a first exciter to send a first excitation signal, and controlling a second exciter to send a second excitation signal; respectively receiving response signals that are generated according to the first excitation signal or the second excitation signal by all tire pressure sensors; performing positioning on front and rear wheels according to times when the response signals are received, to identify response signals sent by tire pressure sensors of the front and rear wheels; and performing positioning on left and right wheels according to the signal strength information, to identify response signals sent by tire pressure sensors of the left and right wheels. Positioning is performed on the wheels according to the times when the response signals are received and the signal strength information, so that tire locations can be identified in real time when an automobile is stationary or in motion without manually entering identifiers (IDs) of the tire pressure sensors, and identification results are accurate and reliable.