Aquaplane Detection via Radial Acceleration Derivative Analysis
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Solution Overview
Problem
Existing methods struggle to detect the aquaplane condition of a tire, particularly in the presence of thin water layers, which limits the effectiveness of vehicle control systems in responding to this hazardous situation.
Innovation Solution
A method and system utilizing an accelerometric sensor in the crown portion of the tire to measure radial acceleration, process the signal to determine the trend of its derivative, and generate a notification signal based on parameters derived from the interaction between the tire and water layer, enabling early detection of aquaplane conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods are used, then detection capability is sufficient for thick water layers, but detection precision deteriorates with thin water layers (1-3 mm)
Solution Approach 1:
The patent replaces conventional mechanical sensors (arranged in the crown portion of the tyre) with an accelerometric sensor that measures radial acceleration. By processing the acceleration signal and analyzing the trend of its derivative, the system can detect aquaplane conditions with thin water layers (1-3 mm) that were previously undetectable, thereby improving measurement precision without increasing detection difficulty
Solution Approach 2:
The patent changes the detection parameter from direct mechanical deformation measurement to radial acceleration measurement. By analyzing the first derivative of the acceleration signal and comparing maximum values, the system achieves enhanced sensitivity to thin water layers, resolving the contradiction between measurement precision and detection difficulty
2Loss of time
If detection is delayed, then system complexity remains low, but loss of time increases due to delayed activation of control systems
Solution Approach 1:
The accelerometric sensor detects aquaplane conditions before complete loss of traction occurs, by measuring changes in radial acceleration during the transition phase. This preliminary detection enables timely activation of vehicle control systems, reducing response time without requiring overly complex detection infrastructure
Solution Approach 2:
The patent introduces signal processing as an intermediary between the physical aquaplane condition and the control system activation. By processing acceleration signals and analyzing derivative trends, the system translates subtle physical changes into actionable detection data, achieving early detection with moderate system 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
Enables the detection of aquaplane conditions even with thin water layers, allowing for timely activation of vehicle control systems to prevent loss of traction and directional control.
Implementation Method 1
obtain an acceleration signal, representative of a radial acceleration undergone by a portion of a crown zone of said tyre due to the rolling of said tyre on said rolling surface
Data Source
AI summary
Starting from an acceleration signal, representative of a radial acceleration undergone by a portion of a crown region of said tyre due to the rolling of said tyre on a rolling surface, the trend of the first derivative of the radial acceleration is determined at a portion representative of the interaction of the tyre with a water layer. From the trend of the first derivative of the radial acceleration, it is determined at least one first parameter representative of an aquaplane condition of the tyre on the basis of a comparison between a first maximum and a second maximum of the first derivative at the portion representative of the interaction between tyre and water layer.