TPMS Tire Positioning Using Multi-Exciter Signal Correlation
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Solution Overview
Problem
Existing tire positioning methods in TPMS systems are inefficient and inaccurate, particularly when determining the correspondence between tire pressure sensors and their respective tires, especially in vehicles with spare tires.
Innovation Solution
A method involving the use of multiple exciter sets to send low-frequency signals, triggering tire pressure sensors to an active mode, and receiving high-frequency signals to determine the correspondence between exciter sets and tire pressure sensors, utilizing synchronization and position attributes to improve accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional tire positioning methods are used in TPMS systems, then the system can monitor tire pressure and temperature, but the positioning accuracy is insufficient and cannot accurately determine the correspondence between tire pressure sensors and their respective tires
Solution Approach 1:
The patent divides the positioning process into multiple transmission cycles, with each cycle focusing on determining correspondences for specific exciter sets. By segmenting the overall positioning task into smaller sub-tasks handled sequentially across different cycles, the system can systematically establish sensor-tire correspondences without information loss, thereby improving positioning accuracy.
Solution Approach 2:
The patent performs preliminary actions by successively controlling different exciter sets to send low-frequency signals that trigger tire pressure sensors into active mode before receiving high-frequency feedback signals. This preliminary activation ensures that sensors are ready to respond, enabling accurate determination of correspondences between exciter sets and sensors, thus preventing information loss.
2Measurement precision
If multiple exciter sets are used to send low-frequency signals to trigger tire pressure sensors, then the positioning accuracy is improved, but the transmission cycle time increases
Solution Approach 1:
The patent implements periodic action by organizing the transmission process into multiple transmission cycles, where different exciter sets are successively activated in each cycle. This periodic structure allows the system to methodically determine correspondences for multiple sensors without requiring all exciters to operate simultaneously, thus improving accuracy while managing the overall time through structured periodic operations.
Solution Approach 2:
The patent applies dynamics by adaptively adjusting the activation sequence of different exciter sets based on the determination progress from previous transmission cycles. The system dynamically controls which exciter sets are activated in subsequent cycles based on already-established correspondences, optimizing the process to achieve accurate positioning while minimizing unnecessary transmission time.
3Reliability
If correspondence determination is performed for all exciter sets in each transmission cycle, then complete positioning information is obtained, but the system complexity and computational load increase
Solution Approach 1:
The patent applies partial action by determining correspondences for only some exciter sets in each transmission cycle rather than all exciter sets. The system progressively determines correspondences across multiple cycles, accumulating complete positioning information without requiring complex simultaneous control of all exciters in a single cycle, thus reducing system complexity while maintaining reliability.
Solution Approach 2:
The patent implements feedback mechanisms where the electronic control device uses determination results from previous transmission cycles to guide subsequent cycle operations. By feeding back the established correspondences to adjust future transmission cycles, the system efficiently completes positioning information gathering without redundant operations, reducing control complexity while ensuring complete and reliable positioning data.
Data Source
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AI summary
Embodiments of the present invention relate to the technical field of automobiles and disclose a tire positioning method and apparatus, an electronic control unit (ECU) and a tire pressure sensor. The method includes: successively controlling, within a transmission cycle, one of L exciter sets to send a low-frequency signal, L being an integer greater than 1; receiving high-frequency signals fed back by N tire pressure sensors according to the low-frequency signals, N being an integer greater than 1; determining a correspondence between one of the L exciter sets and M tire pressure sensors according to the high-frequency signals, M being an integer greater than 1; and after a quantity of transmission cycles reaches a preset threshold, determining a tire corresponding to each of the N tire pressure sensors according to the correspondence between the exciter set and the M tire pressure sensors determined in each transmission cycle. The tire positioning method is accurate and reliable.