Wound Material Overlap Detection Using Height Profile Analysis
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Solution Overview
Problem
Existing methods for determining the overlap length of wound materials struggle with precision, especially when materials are cut obliquely or have blunt splices, leading to inaccurate detection of end edges and overlap lengths due to the inability to detect subtle height differences and seamless transitions.
Innovation Solution
Creating a height profile of the material strip during the winding process using sensors that generate a two-dimensional or one-dimensional profile, allowing for the precise determination of the beginning and end edges, and calculating the overlap length by analyzing the height information at equidistant positions, which can distinguish between the material edges and artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional edge detection methods are used, then the detection process is simple, but the measurement precision deteriorates when materials are cut obliquely or have blunt splices
Solution Approach 1:
The patent transitions from conventional one-dimensional edge detection to two-dimensional height profile analysis. By measuring the height dimension in addition to the tangential position, the system can detect edges regardless of their orientation or splice type, resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The height profile is created during the winding operation itself, before the overlap determination is needed. This preliminary measurement captures all necessary geometric information, allowing for precise overlap calculation later without requiring additional complex detection equipment at the moment of overlap
2Reliability
If the end edge of the material strip is detected after a single drum revolution, then the detection time is short, but the reliability deteriorates due to inability to distinguish end edge from artifacts
Solution Approach 1:
The system uses the known starting edge position as feedback to predict where the end edge should be located after one revolution. This expected position serves as a reference to guide the search and validation process, improving reliability by comparing detected features against predicted patterns while minimizing unnecessary time consumption
Solution Approach 2:
The starting edge position is determined in advance during the winding operation, creating a reference point that enables reliable end edge detection. This preliminary information allows the system to focus its search efficiently, balancing reliability with time constraints
3Measurement precision
If height information is collected at multiple equidistant positions, then the measurement precision improves, but the device complexity increases due to multiple measurement points
Solution Approach 1:
The measurement process is segmented into discrete equidistant positions around the drum circumference. By dividing the continuous measurement task into specific sampling points, the system achieves precise position determination through mathematical interpolation while avoiding the need for continuous complex measurement systems at all points
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
This method enables accurate detection of both abrupt and subtle edge forms, including blunt splices, allowing for precise measurement of overlap lengths and improving the quality control of wound materials by providing a spatially resolved analysis of the material's surface features.
Implementation Method 1
creating a height profile of a surface of the material strip, which covers the beginning and the end of the wound material strip
Data Source
AI summary
A distance measure between a beginning and an end of a material strip wound onto a body in a tangential direction can be determined by creating a height profile of a surface of the material strip, which covers the beginning and the end of the wound material strip in the tangential direction. If a position value of the beginning of the material strip is determined in the created height profile, the distance measure can be determined using this position value and the height profile covering the end of the material strip.