Electrical Cable Structure Analysis Using Magnetic Field Detection
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Solution Overview
Problem
Current methods for detecting optical fiber rupture or attenuation in electrical cables can only identify up to two damaged points and do not provide information about mispositioning of metal tubes, which can lead to structural anomalies and damage during cable operation, limiting the detection of manufacturing and deployment deficiencies.
Innovation Solution
Measuring the magnetic field generated by a current injected into an elongated metallic element within the electrical cable allows derivation of structural information, including the position of the metal tube and stranding/winding parameters, using an electrical generator, detection apparatus, and analysis device to process magnetic field values along the cable length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical fiber testing methods are used to detect damage, then fiber rupture or attenuation can be identified, but information about metal tube mispositioning and structural anomalies cannot be obtained
Solution Approach 1:
The magnetic field measurement system is designed to perform multiple functions: detecting optical fiber damage, identifying metal tube mispositioning, and characterizing cable structural parameters such as stranding and winding. By using magnetic field sensors to measure the field generated by current in the metallic element, the system obtains comprehensive structural information that goes beyond simple fiber integrity testing.
2Measurement precision
If conventional optical fiber testing is performed, then fiber damage can be detected, but manufacturing and deployment deficiencies remain undetected
Solution Approach 1:
The patent uses the magnetic field as an intermediary to indirectly detect structural anomalies. Instead of directly observing physical defects, the system measures the magnetic field generated by current flowing through the metallic element, which reflects the cable's structural configuration. This indirect measurement approach enables detection of manufacturing and deployment deficiencies that are otherwise difficult to observe.
3Loss of information
If magnetic field measurement is used, then comprehensive structural information is obtained, but additional equipment and measurement complexity are required
Solution Approach 1:
The patent replaces complex mechanical inspection methods with electromagnetic field measurement. Instead of using physical probes or visual inspection to detect structural anomalies, the system uses magnetic field sensors to measure the magnetic field generated by current in the metallic element. This substitution simplifies the measurement process while providing comprehensive structural information.
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 efficiently provides comprehensive information about the electrical cable structure, including the position of the metal tube and stranding parameters, enabling the detection of structural anomalies and ensuring proper cable manufacturing and deployment, beyond the limitations of existing methods.
Implementation Method 1
generating by the electrical generator an electrical current flowing along the electrical circuit
Implementation Method 2
detecting a magnetic field associated to the electrical cable and the electrical current
Data Source
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AI summary
It is described an electrical cable analysis method (100), comprising: providing (101) an electrical cable (1) comprising an elongated metallic element (12, 8a) and a cable core (2), the latter comprising an electrical conductor (3); connecting (102) an electrical generator (25) to an electrical circuit (300) including said elongated metallic element (12, 8a); generating (103) by the electrical generator (25) an electrical current (i) flowing along the electrical circuit (300), detecting (104) a magnetic field associated to the electrical cable (1) and the electrical current (i); measuring at least one value (MD) relating to the magnetic field along the cable length; and analysing (105) the measured at least one value (MD) to obtain information about at least one structural aspect of the electrical cable (1).