Rough Transparent Detection Plate for Wet Tire Analysis
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Solution Overview
Problem
Current methods for analyzing the interface region between a pneumatic tire and a wet road surface under dynamic driving conditions, such as rolling, braking, and steering, face challenges in accurately capturing the water expulsion profile and velocity due to reduced friction on detection plates made of smooth materials like glass or resin, leading to unreliable image data.
Innovation Solution
The apparatus employs a multi-layer detection plate with a rough, transparent interface layer that promotes tire adherence by having micro-geometric irregularities, enhancing friction and image clarity, combined with a partially submerged support frame and high-speed camera for precise image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a smooth detection plate (glass or resin) is used, then the plate allows for transparent observation and image capture, but the friction between the tire and plate is reduced, leading to unreliable image data of water expulsion profile
Solution Approach 1:
The detection plate has different surface qualities in different regions: the upper surface facing the tire has micro-geometric irregularities to increase friction, while the lower surface remains smooth to allow optical transmission. This local differentiation resolves the contradiction between friction and transparency.
Solution Approach 2:
The detection plate is constructed as a composite structure with a transparent base material (glass or resin) and a surface layer with micro-geometric irregularities. This composite design combines the optical properties of transparent materials with the friction-enhancing properties of rough surfaces.
2Reliability
If a rough surface is applied to the detection plate to increase friction, then tire adherence is improved, but the transparency and smoothness required for clear image capture may be compromised
Solution Approach 1:
The rough surface is applied only to the upper surface of the detection plate that contacts the tire, while the lower surface remains smooth and transparent. This localized application of roughness maintains both tire adherence and image capture quality.
Solution Approach 2:
The detection plate is functionally segmented into two surfaces: an upper friction-enhancing surface with micro-geometric irregularities and a lower optical transmission surface. This segmentation allows each surface to optimize its specific function without compromising the other.
3Adaptability or versatility
If water is present on the detection plate during testing, then realistic wet road conditions are simulated, but the reduced friction makes image capture of water expulsion profile unreliable
Solution Approach 1:
The micro-geometric irregularities on the detection plate surface change the friction parameter even in the presence of water. The irregularities create capillary effects and increased surface area contact that maintain friction under wet conditions, allowing realistic testing without sacrificing measurement accuracy.
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 setup allows for sharper, more accurate image acquisition of the water expulsion profile and tire behavior, closely mimicking real-world conditions, thereby improving the reliability of tire performance analysis on wet surfaces.
Implementation Method 1
The interface layer (4) consists of a material that is plastic and rough, i.e., that has, on one of the surfaces thereof, micro-geometric irregularities such as grooves, wrinkles, ripples or granularity, at least at the interface with the pneumatic tire (100), in such a way as to promote the adherence of the latter to the interface layer (4)
Implementation Method 2
The interface layer (4) is at least partially transparent, preferably optically transparent, i.e., it allows most of the light that strikes it to be transmitted through it without being reflected
Implementation Method 3
Below the detection plate there are sources of illumination and an image detection device, with the lens facing the detection plate in order to acquire a sequence of images
Data Source
AI summary
The present application refers to an apparatus for the analysis of real data relating to the interface region between a pneumatic tire and the road surface under wet conditions. In particular, such an apparatus makes it possible to detect the ground contact region and the water expulsion profile of a pneumatic tire, particularly on wet surfaces, under differing dynamic driving conditions (rolling, braking, and steering of the pneumatic tire).