Wireless Wheel ID Correlation for TPMS Position Accuracy
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Solution Overview
Problem
Existing tire pressure monitoring systems face inefficiencies in correlating wheel installation position information due to signal strength changes during wheel rotation and potential damage from vibrations, leading to incorrect correlations and reduced durability.
Innovation Solution
A wheel information-acquiring system with a first communication device in each wheel transmitting radio signals, including identification and measurement data, and a second communication device in the vehicle body receiving and correlating this information without a magnetic operation switch, using a setting device to ensure accurate and durable correlation of ID with installation position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic operation switch is used to correlate wheel installation position information, then the correlation can be performed, but the durability is reduced due to contact points being damaged by vibrations
Solution Approach 1:
The patent replaces the magnetic operation switch (mechanical contact-based system) with a radio communication-based system. The first communication device in the wheel and the second communication device in the vehicle body transmit and receive signals wirelessly to correlate wheel installation position information, eliminating mechanical contact points that are vulnerable to vibration damage.
2Ease of operation
If signal strength-based correlation is used during wheel rotation, then the correlation process is simplified, but incorrect correlations occur due to signal strength changes
Solution Approach 1:
The patent introduces a unique identification signal as an intermediary to establish correspondence between the first and second communication devices. Instead of relying on signal strength that varies with wheel rotation, the unique ID serves as a stable identifier that correctly matches wheels to their installation positions even during rotation.
3Manufacturing precision
If manual correlation methods are used to ensure accuracy, then correlation precision is improved, but working efficiency is reduced
Solution Approach 1:
The system enables automatic correlation through radio communication between the first communication device in the wheel and the second communication device in the vehicle body. The unique identification signals are automatically transmitted and matched, eliminating the need for manual intervention while ensuring accurate correlation, thus improving working efficiency without sacrificing precision.
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
Ensures accurate identification of the wheel source for transmitted data and enhances durability by eliminating contact points like magnetic switches, improving working efficiency in vehicle production and wheel rotation processes.
Implementation Method 1
a first communication device disposed in a wheel to transmit by radio wheel information regarding the wheel together with identification information that the first communication device holds
Implementation Method 2
a second communication device disposed in a vehicle body in which the wheel is installed to receive the wheel information and the identification information transmitted from the first communication device
Data Source
AI summary
A wheel information-acquiring system (10) sends wheel information, such as a tire inner pressure, together with preset identification information from a transmitter provided on a wheel installed on a motor vehicle and causes a receiver to receive the transmitted information.In the wheel information-acquiring system, a setting device (60) transmits by wireless an ID, which the setting device is causing a transmitter (16a) to set, to the transmitter (16a) and causes the transmitter (16a) to set the ID. The setting device then transmits by wireless this ID and wheel installation position information, which is separately set and input, to the receiver, causing the receiver to map the ID and the wheel installation position information and then set and register the result of the mapping. The setting device also can acquire an ID unique to the transmitter (16a) and transmit the ID and wheel installation position information to the receiver. The structure makes it possible that the installation position of a wheel having wheel information received by the receiver is reliably specified. Thus the system with excellent durability and the wheel installation position information-setting device that realizes the system are provided.