Tire-Mounted Sensor Wheel Position Detection via Tangential Vibration
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Solution Overview
Problem
Existing wheel position detecting devices require manual operation or bilateral communication equipment to determine whether a sensor transmitter is attached to the right or left wheel, increasing complexity and cost.
Innovation Solution
A wheel position detecting device with a tire-mounted sensor that includes a vibration detection unit and signal processing unit to determine the wheel position based on tangential vibration signals, transmitting this data to a vehicle body side system for identification without the need for manual operation or bidirectional communication equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual operation is used to link ID information and wheel position, then wheel position can be determined, but the work becomes complicated and time-consuming
Solution Approach 1:
The sensor transmitter automatically performs self-identification by detecting vibration signals and determining its own wheel position without requiring manual operation. The system uses the vibration characteristics detected during tire rotation to autonomously identify whether it is mounted on the left or right wheel, eliminating the need for operator intervention in the position linking process.
Solution Approach 2:
The patent replaces manual mechanical operations with an automated sensing and processing system. The vibration detection unit captures mechanical vibrations during tire rotation, and the control unit processes these signals to automatically determine wheel position, substituting the manual linking process with an automated electromechanical system.
2Measurement precision
If bilateral communication equipment is used to determine wheel position, then wheel position can be specified, but the number of components increases and costs are added
Solution Approach 1:
The patent extracts the wheel position determination function from the complex bilateral communication system and implements it within the sensor transmitter itself. By incorporating a vibration detection unit and control unit that processes vibration signals, the system eliminates the need for separate communication equipment while maintaining accurate wheel position identification.
Solution Approach 2:
The sensor transmitter independently determines its own wheel position using onboard vibration detection and signal processing capabilities. This self-service approach eliminates the need for external communication equipment to exchange position information, reducing system complexity and component count.
3Measurement precision
If trigger device is used for simple left/right wheel determination, then wheel position can be identified, but the equipment is still necessitated and adds complexity
Solution Approach 1:
The sensor transmitter autonomously determines left/right wheel position by analyzing vibration signals detected during tire rotation. The control unit processes the vibration signal characteristics to identify the mounting position without requiring any external trigger device, enabling the system to serve itself for position identification.
Solution Approach 2:
The patent replaces the mechanical trigger device with a vibration-based detection system. The vibration detection unit captures mechanical vibrations during tire rotation, and the control unit analyzes these signals to determine wheel position, substituting the trigger device mechanism with a non-contact vibration sensing approach.
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
Enables accurate and cost-effective determination of wheel position without manual operation or additional communication equipment, simplifying the process and reducing component count.
Implementation Method 1
a vibration detection unit, which is provided in a back surface of the tire of each of the four wheels and outputs a detection signal corresponding to a magnitude of vibration generated in a tangential direction of the tire
Data Source
AI summary
In a tire-mounted sensor attached to a tire, the rotation direction of which is predetermined with respect to the direction of forward movement, a left/right determination as to which of a right wheel or a left wheel has the tire-mounted sensor attached thereto is made on the basis of a detection signal of an acceleration sensor. The result of left/right determination is transmitted to a receiver. In this way, without requesting an operator's manual operation or equipment for bidirectional communication, which of the right wheel or the left wheel has the tire-mounted sensor attached thereto can be determined.