Cable Layer Surface Scanning for Minute Defect Detection
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Solution Overview
Problem
Existing quality control methods for cable layers, particularly in high-voltage cables, fail to effectively identify and quantify very small geometric deviations or defects in the manufacturing process, which can affect electrical and mechanical performance.
Innovation Solution
An in-line surface scanner system that includes non-contact distance scanners and a controller to extract surface texture data by segmenting scan data, allowing real-time analysis of minute geometric deviations or defects, and a digital twin monitoring unit for continuous quality control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If diameter measurement QC approach is used, then manufacturing process can be controlled, but fine or textural features and minute geometric deviations cannot be identified
Solution Approach 1:
The patent segments the cable layer surface into multiple measurement zones using a scanning device that moves along the cable layer. This segmentation allows the system to measure not only the overall diameter but also local surface variations, textural features, and minute geometric deviations in different segments of the cable layer surface.
Solution Approach 2:
The patent transitions from one-dimensional diameter measurement to two-dimensional surface mapping by scanning the cable layer surface. The scanning device captures surface profiles at multiple positions around the cable layer circumference, creating a two-dimensional representation that reveals textural features and geometric deviations that cannot be detected by single-point diameter measurement.
2Reliability
If in-line surface scanning is implemented, then real-time quality control of surface features is improved, but device complexity increases
Solution Approach 1:
The scanning device is designed to perform multiple measurement functions: it can detect diameter, surface texture, geometric deviations, and other cable layer characteristics. This multi-functionality reduces the need for separate specialized measurement devices and allows a single in-line scanning system to provide comprehensive quality control.
Solution Approach 2:
The system uses the cable layer itself as the reference for measurement, with the scanning device detecting surface features relative to the cable layer's own geometry. This self-referencing approach eliminates the need for complex external measurement fixtures and reference standards, simplifying the overall system configuration.
3Productivity
If continuous in-line scanning is performed, then real-time defect detection is improved, but measurement time and processing requirements increase
Solution Approach 1:
The scanning device is positioned and configured in advance during cable layer manufacturing, enabling continuous measurement without interrupting the production process. The system performs preliminary measurements during the manufacturing operation itself, eliminating the need for separate inspection steps and reducing total measurement time.
Solution Approach 2:
The scanning device operates continuously as the cable layer moves through the manufacturing process, maintaining constant contact with the cable layer surface. This continuous scanning approach ensures that defects are detected immediately at the point of occurrence, eliminating downtime for intermittent measurements and maximizing productivity.
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 real-time identification and quantification of surface texture features, improving the quality control of cable layers by detecting defects and deviations, enhancing the manufacturing process and ensuring the integrity and performance of high-voltage cables.
Implementation Method 1
one or more non-contact distance scanners arranged to measure distance to an outer surface of the received cable layer
Data Source
AI summary
A system for surface analysis of a cable layer. The system comprises an in-line surface scanner arrangement and a controller. The in-line surface scanner arrangement is for scanning a cable layer in or received from a cable manufacturing line, the scanner arrangement comprising one or more non-contact distance scanners arranged to measure distance to an outer surface of the received cable layer. The controller is arranged to receive scan data of the outer surface of the received cable layer based on signals received from the in-line surface scanner arrangement; extract surface texture data from the scan data; determine one or more properties of the surface of the cable layer based on the surface texture data; compare at least one determined property with one or more threshold criteria; and identify at least one of a surface feature of interest, a deviation, or a defect based on the comparison.