Image Processing Calibration Check for Sheet Metal Workpiece Sorting
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Solution Overview
Problem
Existing image processing systems in sheet metal working machines may not be adequately calibrated, which can lead to incorrect identification of workpieces and inefficient sorting processes.
Innovation Solution
A method for checking the calibration of an image processing system involves arranging a calibration plate of a predefined shape in a removal region, capturing an image of the plate, and testing whether the image properties match stored properties, with the results indicating the system's calibration status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the image processing system is not calibrated sufficiently accurately, then the system can operate without additional calibration procedures, but the workpiece identification becomes incorrect and sorting cannot be guaranteed
Solution Approach 1:
The patent implements a calibration check procedure that is performed before actual workpiece processing. A calibration plate with known geometric properties is captured and evaluated to verify that the image processing system is properly calibrated. This preliminary verification ensures that subsequent workpiece identification will be reliable, preventing incorrect sorting while maintaining operational efficiency.
2Reliability
If a calibration check procedure is implemented, then the calibration status can be verified, but the processing time increases due to additional steps
Solution Approach 1:
The patent performs a focused calibration check using only the essential elements (calibration plate with specific geometric features) rather than a complete recalibration process. The system captures an image of the calibration plate and evaluates key properties such as shape, size, and position to determine calibration status. This partial verification approach provides sufficient reliability information without the time cost of full recalibration.
3Ease of manufacture
If manual calibration is performed by aligning CAD representation with displayed image, then the image capture device can be calibrated to machine coordinate system, but the process becomes complex and operator-dependent
Solution Approach 1:
The patent employs an automated calibration check where the image processing system independently captures an image of the calibration plate, extracts geometric properties, and compares them against stored reference values. The system automatically determines whether calibration is sufficient without requiring manual intervention or operator expertise in coordinate system alignment. This self-verification process simplifies operation while maintaining calibration accuracy.
Data Source
AI summary
A method for checking calibration of an image processing system of a sheet metal working machine includes arranging a calibration plate of a predefined shape in a removal region for processed workpieces, capturing, using at least one camera of the imaging processing system, an image of the calibration plate in the removal region, testing whether properties of the image in different test sections of the removal region correspond with stored properties of the calibration plate, and outputting a result of the testing.