Tire Surface Shape Comparison via Radial Reference Correction
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Solution Overview
Problem
Existing tire data processing technologies face challenges in accurately comparing uneven surface shapes of the tread surface on the left and right sides of a tire, as they fail to account for symmetrical radial direction values, leading to inadequate evaluation of surface wear and machining accuracy.
Innovation Solution
A tire data processing device and method that includes a data acquisition unit, reference point setting, symmetrical reference point selection, and replacement units to ensure radial direction values are coincident, allowing for accurate comparison of surface shapes by generating evaluation values based on differences in radial direction values at symmetrical axial positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional tire data processing methods are used to evaluate surface shape, then general surface shape data can be obtained, but accurate comparison of uneven surface shapes on left and right sides of the tire cannot be achieved
Solution Approach 1:
The patent applies asymmetry by introducing a correction process that specifically addresses the unevenness between left and right sides of the tire. The system identifies asymmetrical deviations from the equatorial plane and applies differential correction to achieve accurate comparison, rather than treating both sides symmetrically with the same reference values.
Solution Approach 2:
The patent changes the reference parameter system by introducing corrected radial direction values (Z1) that are specifically adjusted for symmetrical axial positions. Instead of using a single reference plane, the system modifies the reference values to account for the actual asymmetrical wear patterns, enabling accurate comparison of surface shapes.
2Productivity
If reference points are set at symmetrical axial positions without correction, then comparison can be performed quickly, but radial direction values will not be coincident leading to inaccurate evaluation
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing corrected radial direction values (Z1) for symmetrical axial positions before the actual surface shape comparison. This correction process is performed in advance, so that during the comparison operation, the system can directly use these pre-corrected reference values, maintaining high processing efficiency while ensuring accuracy.
3Device complexity
If no reference point replacement is performed, then the processing steps remain simple, but uneven surface shapes cannot be accurately compared
Solution Approach 1:
The patent extracts and isolates the correction process as a separate, dedicated function. The reference point replacement unit specifically targets and corrects only the radial direction values at symmetrical axial positions, separating this correction step from the general surface shape measurement process. This modular approach adds minimal complexity while significantly improving measurement accuracy.
Data Source
AI summary
A tire data processing device includes: a data acquisition unit to acquire surface shape data indicating a tire surface shape; a reference point setting unit to set a reference point having a radial direction value predetermined at each of a plurality of axial positions in a tire axial direction; a symmetrical reference point selection unit to select, from a plurality of the reference points, a pair of reference points disposed at symmetrical axial positions with respect to a tire equatorial plane; a reference point replacement unit to replace one or both of the pair of reference points such that radial direction values of the pair of reference points are coincident with each other; and a comparison result generation unit to compare the pair of reference points having the coincident radial direction value with a measurement point cloud of the surface shape data to generate a comparison result predetermined.