Grid-Based Steel Strip Surface Defect Evaluation
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Solution Overview
Problem
Existing methods for evaluating production processes, such as those in steel strip production, face complexity in data processing and visualization due to precise position information storage, leading to cumbersome evaluation and limited appealing representation of recurring or systematic errors.
Innovation Solution
The method employs a grid-based system where measuring locations are generalized by assigning them to grid cells of two grids with different mesh sizes, allowing for simpler evaluation and visualization by aggregating information across surface areas, enabling a transition from coarse to finer spatial resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If precise position information is stored for each measuring location, then measurement precision is improved, but data processing complexity increases
Solution Approach 1:
The patent divides the continuous surface into discrete grid cells with standardized coordinates. Instead of storing precise continuous position information for each measurement, measurements are assigned to grid cells, segmenting the position data into manageable discrete units that simplify processing while preserving spatial distribution information.
Solution Approach 2:
The patent transforms the parameter representation from precise continuous coordinates to discrete grid cell identifiers. This parameter change reduces the complexity of position information storage and processing while maintaining the ability to analyze spatial patterns of defects and measurements across the surface.
2Measurement precision
If detailed position information is stored, then localization accuracy is improved, but data visualization complexity increases
Solution Approach 1:
By segmenting the surface into a grid structure, the patent enables visualization of measurement data through standardized grid cell representations. This segmentation allows for systematic display of data patterns across the surface without the complexity of rendering precise continuous coordinate systems, while still maintaining localization accuracy through grid cell identification.
3Ease of operation
If measurements are aggregated over large surface areas, then evaluation simplicity is improved, but measurement precision is reduced
Solution Approach 1:
The grid structure enables a hierarchical evaluation approach where data can be aggregated at different grid resolution levels. Coarse grid cells provide simplified overview evaluation, while finer grid cells maintain higher position precision when needed. This segmentation allows flexible aggregation without permanently losing precision information.
Solution Approach 2:
Different grid cell sizes can be applied to different regions of the surface based on local requirements. Areas requiring higher precision can use finer grid cells, while areas where overall trends are more important can use coarser grid cells, optimizing both evaluation simplicity and measurement precision locally.
Data Source
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AI summary
The invention relates to a method for evaluating a production process in which at least one production step is carried out on at least one product, wherein a measuring device performs a measurement to determine information, the information depending on a property of the product at a measuring location on the surface of the product at the time of measurement, wherein the information is generated from the result of the measurement, wherein an evaluation unit assigns the information to a grid cell of a first grid consisting of only a single grid cell or to a grid cell of a first grid consisting of at least two grid cells, wherein each grid cell of the first grid is assigned to a surface region of the product, and the evaluation unit assigns the information to the grid cell of the first grid in whose surface region the measuring location is located.wherein the evaluation unit stores the information and/or a secondary information dependent on the information and a positional information that represents the position of the grid cell of the first grid to which the information was assigned within the first grid in a database, wherein the evaluation unit assigns the information to a grid cell of a second grid consisting of a number of grid cells, wherein the number of grid cells of the second grid is greater than the number of grid cells of the first grid, and each grid cell of the second grid is assigned to a surface region of the product that is smaller than the surface region to which a grid cell of the first grid is assigned, and the evaluation unit assigns the information to the grid cell of the second grid in whose surface region the measurement location is located.wherein the evaluation unit stores the information and/or a secondary information dependent on the information and a positional information that represents the position of the grid cell of the second grid to which the information was assigned within the second grid in the database.