3D Laser Scanning of High-Voltage Cable Insulation Irregularities
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Solution Overview
Problem
Conventional methods for inspecting the insulation of high voltage cables are unreliable and lack replicability, relying on manual inspections or limited measurements that can overlook irregularities, posing safety risks and affecting the quality of cable processing.
Innovation Solution
A method and system using a laser scanner to scan the insulation surface, generating a 3-dimensional model for data evaluation, which includes combining data from multiple scanners to assess the cable's surface quality and compare it to a reference model, identifying irregularities and determining the processing result quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual inspection methods are used, then the inspection process is simple and quick, but the reliability and replicability of inspection results deteriorate
Solution Approach 1:
The patent replaces manual tactile inspection with an automated optical measurement system using a laser scanner. The laser scanner objectively measures the insulation surface geometry and compares it against CAD data, eliminating subjective human judgment while maintaining operational simplicity through automated processing.
Solution Approach 2:
The patent creates a digital 3D copy of the insulation surface by scanning with a laser scanner. This digital model is then compared against the CAD reference model to automatically detect deviations, providing replicable and reliable inspection results without manual intervention.
2Ease of operation
If conventional measurement methods are used, then the inspection process is simple, but the detection precision of surface irregularities deteriorates
Solution Approach 1:
The patent replaces simple mechanical measurement tools (slide gauge, diameter tape) with a laser scanning system that captures the complete 3D geometry of the insulation surface. This enables precise detection of surface irregularities while keeping the operation simple through automated scanning and evaluation.
Solution Approach 2:
The patent transitions from 1D or 2D measurements using conventional tools to comprehensive 3D surface scanning. The laser scanner captures the entire surface geometry in three dimensions, enabling detection of irregularities that would be missed by linear measurements alone.
3Reliability
If automated laser scanning is used, then the reliability and precision of inspection results improve, but the device complexity increases
Solution Approach 1:
The patent uses a laser scanner to create a digital 3D copy of the insulation surface, which is then compared against the existing CAD model. This approach leverages already-available CAD data and software capabilities, reducing the need for complex custom analysis systems while maintaining high reliability.
Solution Approach 2:
The patent employs a laser scanner, which is a versatile device capable of scanning various geometries and surfaces. By using this multi-functional device for cable insulation inspection, the system avoids requiring specialized custom-built equipment, thereby reducing overall system complexity.
4Ease of manufacture
If manual inspection is used, then the equipment cost is low, but the productivity and throughput of cable processing deteriorate
Solution Approach 1:
The laser scanning system enables continuous inspection of the insulation surface as the cable moves through the processing line, rather than requiring intermittent manual measurements. This continuous automated inspection maintains cable processing throughput while improving reliability.
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 approach enhances the reliability and replicability of insulation inspections, improving quality assurance by detecting irregularities and reducing the need for subsequent grinding, thus saving time and effort in cable accessory installation.
Implementation Method 1
scanning a surface of a high voltage cable's insulation by at least one laser scanner
Implementation Method 2
scanning includes moving the at least one laser scanner and the high voltage cable relative to each other
Data Source
AI summary
A method for inspecting an insulation of a high voltage cable is described. The method includes a data acquisition including scanning a surface of a high voltage cable's insulation by at least one laser scanner. The scanning includes moving the at least one laser scanner and the high voltage cable relative to each other along a length direction of the high voltage cable. The method further includes a data evaluation including: generating a 3-dimensional model of the scanned surface based on the acquired data.