Wheel Position Identification by Tire Rotation Interval
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Solution Overview
Problem
In tire condition monitoring systems, the receiver faces challenges in determining which wheel assembly a transmitter is attached to, especially when the outer diameters of the front and rear wheels differ, leading to varying rotation periods and transmission intervals.
Innovation Solution
A wheel position identifying device and system that utilize a reception circuit and an identifying device control unit to differentiate between transmission signals from front and rear wheel assemblies based on the reception intervals and rotation periods, using the difference in outer diameters to determine the correct association of transmitters with their respective wheel assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transmitters are provided in wheel assemblies with different outer diameters, then the system can monitor tire conditions in vehicles with different front and rear wheel sizes, but the receiver cannot determine which wheel assembly each transmitter belongs to due to varying rotation periods and transmission intervals
Solution Approach 1:
The patent utilizes the inherent parameter difference (outer diameter) between front and rear wheel assemblies to create distinguishable transmission characteristics. By measuring the reception interval of transmission signals and comparing it with the rotation period calculated from known wheel outer diameters, the system can identify which wheel assembly each transmitter belongs to, thus resolving the wheel position identification problem while maintaining adaptability to different wheel sizes
Solution Approach 2:
The system employs feedback by continuously monitoring the reception interval of transmission signals and comparing it with the expected rotation period. The identifying device control unit adjusts its determination of transmitter position based on the measured reception interval, creating a closed-loop identification system that accurately associates transmitters with their respective wheel assemblies despite different rotation speeds
Data Source
AI summary
A vehicle includes a front wheel assembly and a rear wheel assembly having different outer diameters. A wheel position identifying device includes a reception circuit and processing circuitry. The reception circuit is configured to receive a first transmission signal and a second transmission signal. The first transmission signal is transmitted from a transmitter attached to the front wheel assembly at a specific rotational position of the front wheel assembly. The second transmission signal is transmitted from a transmitter attached to the rear wheel assembly at a specific rotational position of the rear wheel assembly. The processing circuitry is configured to determine whether each of the transmitters is attached to the front wheel assembly or the rear wheel assembly based on a reception interval of the first transmission signal and a reception interval of the second transmission signal.