Color Sensor Edge Detection for Usable Sheet Material Alignment
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Solution Overview
Problem
Existing methods for detecting sheet material edges, particularly in laminates and woven materials, result in material waste due to manual alignment and trimming, which is time-consuming and introduces wrinkles, while traditional reflective sensors fail to accurately identify usable edges.
Innovation Solution
A system utilizing a pair of color sensing devices with backlighting and a controller to detect the usable edge of sheet material, allowing for automated alignment and reducing material waste by aligning the usable edge for precise cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If manual alignment is used to compensate for unusable material edges, then material waste is reduced, but labor time and complexity increase
Solution Approach 1:
The patent replaces manual mechanical alignment with an automated optical sensing system. Color sensors detect the usable edge of sheet material, and a controller automatically adjusts the spreading machine position based on sensor feedback, eliminating the need for manual alignment operations.
Solution Approach 2:
The system enables self-alignment by using the material's own visual characteristics (color differences at edges) as the reference for automatic positioning. The sensors detect edge features inherent to the material itself, allowing the system to self-correct without external intervention.
2Device complexity
If traditional reflective sensors are used for edge detection, then the system is simple, but measurement precision deteriorates due to inability to distinguish usable edges
Solution Approach 1:
The patent utilizes color differences at material edges as the detection basis. Color sensors detect variations in color reflectance between usable and unusable portions of the material edge, enabling precise identification of the usable edge location based on optical properties rather than simple presence/absence detection.
Solution Approach 2:
The system changes the detection parameter from simple reflective presence to color-specific reflectance measurement. By measuring color parameters (wavelength-specific reflectance), the system can distinguish between different material regions and accurately identify the usable edge.
3Manufacturing precision
If trimming is performed to create uniform edges, then material quality is improved, but processing time and material loss increase
Solution Approach 1:
The system performs preliminary detection of the usable edge before cutting operations. By identifying the exact location of the usable edge in advance using color sensors, the material can be positioned correctly from the start, eliminating the need for subsequent trimming operations to achieve uniform edges.
Solution Approach 2:
The patent converts the previously harmful variable edge condition into a useful detection feature. The natural color variations at material edges, which previously required trimming to correct, are now used as the basis for automatic edge detection and positioning, turning a defect into a functional advantage.
4Adaptability or versatility
If operator alignment by eye is used, then flexibility is maintained, but alignment accuracy deteriorates especially over long fabric spreads
Solution Approach 1:
The patent replaces human visual alignment with automated optical sensing. Color sensors and a controller system provide consistent, repeatable measurements that are not subject to human limitations such as visual fatigue or distance constraints, maintaining flexibility through programmable adaptation to different material types.
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 fully automated material feeding and spreading, increasing accuracy, eliminating secondary alignment processes, and enhancing material utilization by accurately identifying usable edges, thus reducing labor costs and preparation time.
Implementation Method 1
A pair of color sensing devices with backlighting are mounted in the spreader. The color sensing devices sense a usable edge of the sheet material.
Implementation Method 2
A pair of color sensing devices with backlighting are mounted in the spreader
Data Source
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AI summary
An apparatus and method for determining sheet material edges on a surface including a sensor (210) configured to detect an outer edge (56) and a usable edge (55) of the sheet material (10) and a controller (80) in communication with the sensor. The sensor (210) comprises a first color optical sensor (121) producing a first signal representing a first physical attribute of the sheet material and a second color optical sensor (122) producing a second signal representing a second physical attribute of the sheet material. The controller (80) comprises a processor, a memory, and a communications adapter, controls dispensing and spreading of the sheet material for detection by the sensor, and signals to a user a presence of the usable edge in the sheet material (10) upon detection by the sensor (210).