Vehicle Weight Determination via Axle Selection Rules
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Solution Overview
Problem
Conventional vehicle weighing systems, both with short and long weighing bridges, face accuracy issues, with errors ranging from ±1% to ±8%, especially in determining individual axle and total vehicle weights during in-motion weighing.
Innovation Solution
A device and method that derive a set of weights from in-motion vehicle data on a weighing bridge accommodating multiple axles, selecting weights to represent all axles uniquely and combining them to determine the total vehicle weight, using selection rules that prioritize weights with the most axles and highest quality, minimizing errors from mechanical disturbances and axle configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a weighing bridge with length relative to the wheelbase of the vehicle is used, then more axles can be accommodated simultaneously, but the accuracy of determining individual axle weights and total vehicle weight deteriorates
Solution Approach 1:
The patent segments the weighing bridge into multiple measurement zones with separate load cells, allowing independent measurement of each axle's weight even when multiple axles are on the bridge simultaneously. This segmentation enables accurate individual axle weight determination while maintaining the capability to measure multiple axles at once.
Solution Approach 2:
The patent introduces intermediary processing elements including signal processing circuits and computational algorithms that distinguish and separate the weight signals from multiple axles. These intermediaries process the combined load signals to extract individual axle weights and total vehicle weight accurately.
2Device complexity
If conventional weighing methods are used, then the system structure remains simple, but measurement errors increase due to mechanical disturbances and axle configurations
Solution Approach 1:
The patent implements feedback mechanisms where the measured weight data is processed through algorithms that compensate for mechanical disturbances and axle configuration effects. The system continuously refines its measurements by comparing expected weight distributions with actual readings and adjusting accordingly.
Solution Approach 2:
The patent changes the measurement parameters by using multiple load cells at different positions and combining their readings through weighted algorithms. This parameter transformation allows the system to extract accurate individual axle weights and total weight while filtering out mechanical disturbance effects.
Data Source
AI summary
The present invention relates to a device for determining a weight of a vehicle, the device being configured to: obtain a set of weights derived from in-motion weighing of the vehicle on a weighing bridge, wherein each weight in the set of weights represents one or more axle weights of the vehicle; select one or more weights in the set of weights such that the one or more selected weights together represent all axles of the vehicle and each axle of the vehicle is only represented once; determine a total weight of the vehicle based on the one or more selected weights. Furthermore, the invention also relates to a system and corresponding methods.