Vehicle Wheel Load Determination via Circumference Measurement
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Solution Overview
Problem
Existing on-board vehicle weighing systems are complex, time-consuming, and lack accuracy in determining wheel load and vehicle weight, requiring specific models for each wheel type and often necessitating complex measurements of contact surface areas.
Innovation Solution
A method and device that measure the circumference of the wheel to calculate load independently of wheel dimensions, using circumferential data and incorporating measurements such as electrical resistance, capacitance, or pressure and temperature to establish a relationship for load determination, allowing for simpler and more flexible calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex modeling with strain gauges and pressure sensors is used to determine wheel load, then measurement precision may be improved, but device complexity and computational requirements increase significantly
Solution Approach 1:
The patent extracts the essential measurement parameter from complex wheel load systems, focusing solely on circumference variation as the key indicator. By removing unnecessary sensors and complex modeling components, the invention achieves accurate load determination through a single, simple circumference measurement parameter.
Solution Approach 2:
The patent replaces complex mechanical measurement systems (strain gauges, pressure sensors, contact surface measurements) with a simpler circumference-based measurement approach. This substitution eliminates the need for multiple sensors and complex computational models while maintaining measurement capability.
2Measurement precision
If specific models are determined for each wheel type through experimental tests, then measurement accuracy improves, but time and resource consumption increase
Solution Approach 1:
The patent creates a universal circumference-based measurement method that works across different wheel types without requiring type-specific calibration or modeling. The same fundamental principle of measuring circumference variation applies to all wheels, eliminating the need for separate experimental campaigns for each wheel model.
Solution Approach 2:
The patent changes the measurement parameter from complex multi-dimensional wheel characteristics to a single circumference parameter. This parameter transformation simplifies the measurement approach while maintaining accuracy across different wheel types, as circumference variation directly correlates with load regardless of wheel specifics.
3Measurement precision
If contact surface area is measured to determine wheel load, then load determination becomes possible, but the measurement process becomes complex and may require the vehicle to be in motion
Solution Approach 1:
The patent extracts the load determination capability from the complex contact surface measurement process by focusing on circumference variation as the essential indicator. This extraction eliminates the need for complex contact area measurements while preserving the ability to determine wheel load accurately.
4Measurement precision
If wheel dimensions and width are measured to determine ground contact area, then load calculation becomes possible, but the system loses flexibility for wheel changes and breakdowns
Solution Approach 1:
The patent creates a universal measurement approach based on circumference variation that works with any wheel type without requiring knowledge of wheel dimensions or width. This universal method maintains adaptability for wheel changes and breakdowns while providing accurate load determination.
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 continuous determination of wheel load and vehicle weight without requiring precise wheel dimension measurements, improving flexibility and reducing computational complexity.
Implementation Method 1
measurement of at least one datum, called circumferential, relating to a circumference supported by said wheel
Data Source
Figure 1~2
Figure 3a~4b
Figure 5a~6b
AI summary
The invention relates to a method (100) for determining the load on a wheel of a vehicle, comprising the following steps: - measuring (112) at least one circumferential value relating to a circumference of said wheel, and - calculating (114) the load on said wheel as a function of said circumferential value. The invention also relates to a device for determining the load on a wheel of a vehicle, a method, and a system for characterizing a vehicle.