Paper Surface Topography Imaging System
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Solution Overview
Problem
Current methods for measuring paper surface topography, such as laser profilometry and low-angle light methods, are expensive and prone to errors due to inconsistent software corrections and variations in light exposure, which affect the accuracy of surface topography measurements.
Innovation Solution
A system comprising a sample platform with a vacuum-assisted bed to secure the paper, a light source for even light distribution, and panoramic image capture software to analyze the surface topography, ensuring consistent image capture and reducing waviness patterns, thereby providing a quantitative evaluation of paper quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser profilometry is used to measure surface topography, then measurement accuracy is improved, but equipment cost increases significantly
Solution Approach 1:
The patent uses panoramic photography to create a visual copy of the paper surface topography instead of using expensive laser profilometry equipment. The system captures images under controlled lighting conditions and processes them to generate topographic representations, providing a cost-effective alternative that maintains measurement capability through optical copying of surface features
Solution Approach 2:
The patent replaces the mechanical laser profilometry system with an optical imaging system using standard cameras and controlled illumination. This substitution eliminates the need for expensive laser equipment while achieving surface topography measurement through photographic capture and digital image processing
2Measurement precision
If software correction is applied to reduce waviness profile impact, then measurement accuracy is improved, but consistency deteriorates due to sample variability
Solution Approach 1:
The patent applies preliminary action by physically securing the paper sample to the platform before measurement, using vacuum pressure and clamps to eliminate waviness and ensure consistent positioning. This preventive measure removes the need for post-measurement software corrections, ensuring both accuracy and consistency across all samples without requiring variable sample-specific adjustments
3Device complexity
If low angle light method is used for surface topography measurement, then equipment cost is reduced, but measurement accuracy deteriorates due to light exposure variations
Solution Approach 1:
The patent changes the lighting parameters by using controlled illumination at specific angles with consistent intensity across the entire sample surface. The system uses multiple light sources positioned to provide uniform lighting, eliminating the light exposure variations that plague simple low-angle light methods while maintaining equipment simplicity and cost-effectiveness
4Ease of operation
If paper sample is not held down properly during measurement, then ease of operation is improved, but measurement accuracy deteriorates due to waviness patterns
Solution Approach 1:
The patent implements self-service by using vacuum pressure to automatically secure the paper sample to the measurement platform. The vacuum system creates sufficient adhesion to hold the sample flat and stationary during imaging without requiring manual intervention or complex clamping mechanisms, maintaining both ease of operation and measurement accuracy
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
The system enables accurate and consistent measurement of paper surface topography, allowing operators to optimize papermaking machine settings for high-quality paper production with minimal surface defects by correlating topographic data with machine operating parameters.
Implementation Method 1
a sample platform for holding the paper sample
Data Source
AI summary
A system and method of obtaining a quantitative evaluation of paper. By looking at the topographic data and comparing it to machine parameters, an operator can optimize the paper forming machine settings to create consistently high quality paper with minimal surface defects.