Dual-End Optical Arc Fault Sensing for Precise Fault Location
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Solution Overview
Problem
Traditional arc fault detection systems in aircraft power distribution systems provide only broad indications of faults, failing to accurately locate the fault within the component, leading to extensive and inefficient maintenance efforts in large and dense power systems.
Innovation Solution
A fault detection system utilizing an optical conductor with sensors at both ends to detect electromagnetic radiation, coupled with a controller module that determines the location of the arc fault based on time delays of signal propagation, enabling precise fault location within the electrical component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional arc fault detection systems are used, then fault detection is provided, but only broad indications of faults are given without accurate fault location
Solution Approach 1:
The detection system is segmented into multiple sensing zones along the electrical component, with each zone independently monitoring for arc faults. This segmentation enables precise location identification while distributing system complexity across modular sensing units rather than requiring a single complex centralized system.
Solution Approach 2:
An intermediary processing unit is introduced that receives signals from multiple sensing zones and determines fault locations by analyzing signal characteristics and time delays. This intermediary layer separates the complexity of location determination from the sensing elements, allowing simple sensors to achieve precise fault localization through sophisticated signal processing.
2Productivity
If traditional fault detection systems provide broad fault indications, then maintenance efforts are required, but extensive inspection time and costs are incurred
Solution Approach 1:
The system performs preliminary fault location determination continuously during normal operation, so that when a fault occurs, the exact location is already identified and ready for immediate maintenance action. This eliminates the need for time-consuming post-fault inspections and enables rapid targeted repairs.
Solution Approach 2:
The system provides continuous feedback regarding the electrical component's health status and fault location to the control system, enabling proactive maintenance scheduling and resource allocation. This feedback mechanism transforms maintenance from a reactive extensive inspection process to a targeted, time-efficient intervention based on real-time system monitoring.
3Reliability
If power distribution systems operate continuously, then system availability is maintained, but fault propagation risk increases
Solution Approach 1:
The system takes preliminary anti-action by detecting arc faults at their inception and immediately isolating the affected component or zone. This prevents the fault from propagating to other parts of the power distribution system, thereby maintaining overall system availability while eliminating the harmful effects of uncontained faults.
Solution Approach 2:
The detection and isolation mechanism applies local quality control by targeting only the specific zone where a fault is detected, rather than shutting down the entire power distribution system. This localized response maintains system availability in unaffected areas while containing and eliminating the harmful fault effects in the affected zone.
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 targeted maintenance by accurately identifying the fault location, reducing inspection time and costs, and improving system operation by allowing selective power disconnection of affected components while maintaining power to unaffected areas.
Implementation Method 1
a sensor configured to detect electromagnetic radiation from an arc fault in the electrical component
Implementation Method 2
an optical conductor with sensors at both ends to detect electromagnetic radiation
Data Source
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AI summary
A fault detection system (50) for detecting an electrical fault in a component includes an optical conductor (60) with a first end (61) and a second end (62), and configured to optically face the component. A first sensor (51) and a second sensor (52) can be operably coupled to the first end (61) and the second end (62), respectively. The first sensor (51) and the second sensor (52) are each configured to detect electromagnetic radiation propagating through the optical conductor (60).