Detecting Folding Line Inclination via Image Distance Measurement
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Solution Overview
Problem
Existing folding devices struggle to accurately detect and correct the inclination of a folding line with respect to the desired extending direction, leading to suboptimal folding results.
Innovation Solution
An image processing apparatus that acquires image information of a folded sheet, detects the inclination of the folding line by measuring distances from reference positions, and adjusts the folding device accordingly to ensure the folding line is parallel to the desired direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the folding line is formed without inclination detection, then the folding process is simple and quick, but the folding line may be inclined and the folding result is inaccurate
Solution Approach 1:
The image reading device reads the folded sheet in advance (before the folding adjustment) to detect the inclination of the folding line. This preliminary detection allows the folding device to adjust its folding line position based on the detected inclination, ensuring accurate folding alignment without adding complex real-time adjustment mechanisms during the folding process.
Solution Approach 2:
The patent replaces complex mechanical inclination detection and adjustment mechanisms with an image reading device that uses optical scanning to detect folding line inclination. The processor then calculates the inclination based on image data, substituting mechanical measurement systems with optical-digital detection and control.
2Measurement precision
If the folded sheet is read to detect folding line position, then the folding line position can be confirmed, but the inclination of the folding line cannot be detected
Solution Approach 1:
The patent transitions from one-dimensional position detection (only detecting the location of the folding line) to two-dimensional analysis by detecting the inclination angle of the folding line relative to the sheet's extending direction. This is achieved by analyzing the coordinates of multiple points on the folding line in the image data to calculate the angle, thereby recovering the inclination information that was previously undetectable.
Solution Approach 2:
The image reading device provides feedback about the folding line inclination to the folding device. The processor calculates the inclination angle from the image data and sends this information back to the folding device, which then adjusts its folding line position accordingly. This closed-loop feedback ensures accurate folding alignment by continuously monitoring and correcting the folding line position.
Data Source
AI summary
An image processing apparatus includes a processor configured to: acquire image information obtained by reading a folded sheet with an image reading device in a state where the folded sheet is unfolded; acquire first and second distances in the image information, the first and second distances being distances from first and second positions to a predetermined reference of the sheet, respectively, the first and second positions on a folding line of the sheet being separated by a predetermined distance; and detect an inclination of the folding line of the sheet based on the first and second distances.