Electronic Wheel Unit Identification via Revolution Count Comparison
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Solution Overview
Problem
Existing localization methods for electronic wheel units on vehicles fail to accurately identify those connected for conjoint rotation, particularly in heavy trucks with dual wheels, due to limitations in signal strength evaluation and correlation-based methods.
Innovation Solution
A method that acquires and compares the cumulative number of revolutions of each vehicle wheel using acceleration sensors or shock sensors to identify wheel units connected for conjoint rotation, eliminating the need for axle sensors or signal strength measurement devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signal strength evaluation methods are used for localization, then localization can be performed, but the precision is insufficient to distinguish between closely arranged dual wheels
Solution Approach 1:
The patent replaces signal strength evaluation (electromagnetic field-based) with mechanical revolution counting. By using acceleration sensors to detect wheel rotations and comparing cumulative revolution counts, the system identifies dual wheels through their identical rotation patterns, achieving precise localization without relying on signal strength differentiation.
Solution Approach 2:
The patent introduces an intermediary approach by using revolution count comparison as a mediator between the wheel units and the localization determination. Instead of directly measuring signal strength from multiple antennas, the system uses the common rotation characteristic (mediated through revolution counting) to identify which wheels are paired, thereby achieving localization with sufficient precision.
2Measurement precision
If correlation-based localization methods using axle sensor systems are used, then localization can be performed, but the device complexity increases
Solution Approach 1:
The patent extracts only the essential information needed for localization - the cumulative revolution count - from the wheel units. By comparing this single parameter across all wheel units, the system identifies dual wheels without requiring complex axle sensor systems or correlation evaluations of multiple parameters such as rotational position and speed.
Solution Approach 2:
The patent replaces the mechanical axle sensor system with electronic acceleration sensors integrated in the wheel units themselves. This substitution eliminates the need for separate axle-mounted sensors and complex correlation evaluation systems, achieving the same localization function with simpler device architecture.
3Measurement precision
If multiple receiving units or antennas are provided for triangulation, then localization accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The patent enables the wheel units to self-identify their paired status by comparing their own revolution counts with those of other wheel units. Each wheel unit independently determines whether it is part of a dual wheel configuration by detecting that its revolution count matches another wheel's count, eliminating the need for complex centralized triangulation systems.
Solution Approach 2:
The patent makes the acceleration sensors serve multiple functions: they not only monitor wheel rotation for standard TPMS operations but also enable dual wheel identification through revolution count comparison. This multi-functionality eliminates the need for separate localization hardware, achieving precise identification without increasing device complexity.
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
This approach allows for precise identification of electronic wheel units on conjointly rotating wheels, enhancing the accuracy of tire pressure monitoring and localization, especially in configurations where traditional methods are unreliable.
Implementation Method 1
acquiring a respective cumulative number of revolutions of each of the vehicle wheels using the electronic wheel units
Implementation Method 2
acquires and compares the cumulative number of revolutions of each vehicle wheel using acceleration sensors or shock sensors
Data Source
AI summary
The invention relates to a method for identifying electronic wheel units (12-1 to 12-6b) arranged on vehicle wheels (W1-W6b) of a vehicle (1), by means of which method those electronic wheel units (12-3a, 12-3b; 12-4a, 12-4b; 12-5a, 12-5b; 12-6a, 12-6b) which are arranged on vehicle wheels (W3a, W3b; W4a, W4b; W5a, W5b; W6a, W6b) connected to one another for conjoint rotation are identified, the method comprising the steps of: acquiring a respective cumulative number (Ni) of revolutions of each of the vehicle wheels (W1-W6b) using the electronic wheel units (12-1 to 12-6b); comparing with one another the cumulative numbers (Ni) of revolutions of the vehicle wheels (W1-W6b), identifying those electronic wheel units (12-3a, 12-3b; 12-4a, 12-4b; 12-5a, 12-5b, 12-6a, 12-6b) for which the cumulative numbers (Ni) of revolutions at least approximately coincide as being arranged connected to one another for conjoint rotation.