Detecting Decorative Paper Extension Deviations via Projected Pattern Comparison
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Solution Overview
Problem
Existing methods for detecting deviations in the extension of printed decorative papers are complex and cannot be performed at high speeds, making them unsuitable for regular printing processes, which requires efficient and rapid detection to ensure accurate alignment with target dimensions.
Innovation Solution
A method involving projecting a target pattern onto the printed decorative paper to determine deviations in extension by comparing the actual distance of decorative elements with projected pattern elements, using an optical sensor like a camera to capture and process the image, allowing for real-time alignment and corrective measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional measurement methods are used to detect deviations in decorative paper extension, then measurement precision can be achieved, but the detection process becomes too complex and slow for regular printing processes
Solution Approach 1:
The patent projects a target pattern (a copy of the expected decoration) onto the decorative paper and uses camera imaging to capture both the actual decoration and the projected pattern. By comparing the captured image of the actual decoration with the projected target pattern, the system detects deviations without requiring complex contactless measurement devices, thus achieving precise deviation detection while keeping the system relatively simple
Solution Approach 2:
The patent replaces complex mechanical or contactless physical measurement devices with a simple camera imaging system. Instead of using sophisticated sensors to directly measure paper extension, the system projects a visual target pattern and uses standard camera imaging to capture and compare patterns, substituting complex mechanical measurement with optical imaging and image processing
2Measurement precision
If traditional measurement methods are used to detect deviations in decorative paper extension, then measurement precision can be achieved, but the detection speed becomes too slow for regular printing processes
Solution Approach 1:
The target pattern is projected onto the decorative paper in real-time, and a camera captures the combined image of the actual decoration and projected pattern simultaneously. This allows for rapid deviation detection because the entire measurement process occurs through a single imaging operation rather than sequential mechanical measurements, achieving both high precision and high speed suitable for continuous printing processes
Solution Approach 2:
The system continuously projects the target pattern and captures images at regular intervals during the printing process. This periodic imaging allows for real-time monitoring of decorative paper extension deviations, enabling rapid detection and immediate corrective actions while maintaining the continuous flow of production
3Manufacturing precision
If the decorative paper extension deviates from target dimensions, then the decoration may still be produced, but the alignment with target image and structure congruency cannot be achieved
Solution Approach 1:
The system detects deviations by comparing the captured decoration image with the projected target pattern, then feeds this information back to control the printing or processing parameters. This feedback loop allows for automatic adjustment of the printing process to correct extension deviations, achieving accurate dimension control while simplifying the manufacturing process through automation rather than manual intervention
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
Enables rapid and accurate detection of deviations in decorative paper extensions, allowing for immediate corrective actions during the printing process, ensuring consistent quality and alignment with target dimensions, thereby improving the processing and application of decorative papers.
Implementation Method 1
projecting a target pattern onto the sample table and the printed decorative paper
Implementation Method 2
using an optical sensor like a camera to capture and process the image
Data Source
AI summary
The disclosure relates to a method for detecting deviations of extension of decorations on printed decorative papers, the method includes the following steps: providing the printed decorative paper on a sample table, projecting a target pattern onto the sample table and the printed decorative paper such that a distance between two predetermined pattern elements of the projected target pattern corresponds to a target distance between at least two predetermined decorative elements of the decoration, determining deviations between the actual distance of the decorative elements and the distance between the projected pattern elements.