Tyre Defect Detection Using Database-Calibrated Force Profiles
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Solution Overview
Problem
Existing methods for detecting 'weak sidewall' defects in tyres are subjective and prone to variability due to operator experience, and automated systems face challenges in precision and repeatability, often requiring complex setup and positioning procedures.
Innovation Solution
A method utilizing a database with three-dimensional profiles and statistical force values specific to each tyre model, allowing for absolute positioning and deformation calibration, reducing variability and ensuring accurate defect detection without complex setup procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated checking systems are used to detect tyre defects, then productivity and consistency are improved, but device complexity and setup requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the optimal pushing position and force values in a database before actual defect detection. The system retrieves these pre-determined parameters based on tyre model, eliminating the need for complex real-time positioning and calibration procedures during production.
Solution Approach 2:
The patent changes parameters by using a database that stores optimized pushing force values and position coordinates for different tyre models. The system selects appropriate parameters from the database based on the specific tyre model being inspected, allowing automated detection without complex setup procedures for each tyre type.
2Measurement precision
If automated pushing devices are used to deform tyre surfaces for defect detection, then measurement precision is improved, but repeatability decreases due to positioning difficulties
Solution Approach 1:
The patent determines and stores the optimal pushing position coordinates and force values in advance for each tyre model. This preliminary determination ensures that the same precise position and force are applied during every inspection, guaranteeing both measurement precision and repeatability without requiring complex real-time adjustments.
Solution Approach 2:
The patent uses feedback by comparing the measured deformation values against pre-established reference values stored in the database. The system identifies defects based on deviations from these references, ensuring consistent and repeatable detection criteria across different inspections and tyre models.
3Ease of operation
If manual visual inspection is used to detect weak sidewall defects, then ease of operation is maintained, but measurement precision and reliability decrease due to operator subjectivity
Solution Approach 1:
The patent applies self-service by having the system automatically determine the optimal pushing position and force values through its database and processing unit, without requiring operator judgment or adjustment. The system autonomously selects parameters based on tyre model and performs consistent, objective measurements, eliminating human subjectivity while maintaining operational simplicity.
Solution Approach 2:
The patent replaces the manual visual inspection mechanism with an automated mechanical pushing device that applies controlled force to deform the tyre surface. This mechanical substitution eliminates operator subjectivity and variability, providing objective and precise defect detection based on measured deformation values rather than human judgment.
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 approach enables reliable and repeatable automated checks for tyre defects, improving accuracy and reducing production time while accommodating various tyre models, ensuring consistent quality and precision across different tyre types.
Implementation Method 1
pushing a measurement surface of the tyre to be checked so as to apply a deformation on an outer surface of the tyre
Implementation Method 2
measuring a displacement obtained from a deformation
Data Source
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AI summary
A method for checking tyres, comprising: • a database associating tyre models with their three-dimensional profiles and a compression force, where constructing the database comprises for each tyre model: • i. providing said tyre model on a resting plane, wherein the tyre lies on one side, • ii. pushing the opposite side of the tyre to a predetermined height; • iii. repeating the measurement for a plurality of points on the tyre surface for at least an entire rotation of the tyre • iv. measuring a force exerted on each point • v. calculating a statistical value as a function of said force; • vi. associating said statistical value with said three-dimensional profile of tyre model in said database; • during checking a tyre: applying, to an outer surface of a tyre, said compression force equal to said statistical value as a function of said force according to said model that corresponds to said tyre to be checked as obtained from said database to detect a defect thereof.