Arc Detection Self-Checking Optical Signal Monitoring
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Solution Overview
Problem
Existing arc detection sensor devices for high-power systems, such as ultra-high voltage gas insulated switchgear (GIS), may fail to detect minute malfunctions or degradation over time, leading to incorrect failure detection and potential accidents.
Innovation Solution
A self-checking method and apparatus that periodically generates a self-checking optical signal to monitor the operation of the optical sensor device and communication cables, allowing for the detection of abnormalities and ensuring continuous normal operational performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the arc detection sensor device operates continuously for a long time, then the system can detect arcs in high-power devices, but the sensor device itself degrades and may produce false failures or miss actual arcs
Solution Approach 1:
The patent applies preliminary action by periodically generating self-checking optical signals before the sensor device actually fails. The system proactively tests the optical sensor and communication cables by injecting known test signals and comparing received signals against expected values, detecting degradation trends before they cause false arc detection or missed detections.
Solution Approach 2:
The patent implements feedback through a self-checking mechanism where the system continuously monitors its own operational status. The processor compares received self-checking optical signals against reference values, and when deviations exceed thresholds, it triggers alerts or resets. This closed-loop feedback enables the system to self-diagnose and maintain reliability over extended service periods.
2Measurement precision
If the arc detection sensor device is highly sensitive to detect minute arcs, then arc detection capability is improved, but the device becomes more prone to false positives from noise or degradation
Solution Approach 1:
The self-checking mechanism provides continuous feedback on sensor health by comparing received test signals against expected reference values. This feedback loop distinguishes between genuine arc signals and degradation-induced noise, allowing the system to maintain high sensitivity while compensating for sensor drift or cable attenuation through adaptive thresholding and diagnostic algorithms.
Solution Approach 2:
The system performs self-service by automatically monitoring its own operational integrity without external intervention. The processor generates self-checking optical signals, receives them through the optical sensor and communication cables, and autonomously determines whether components are functioning within specifications, thereby reducing false positives from undetected degradation.
3Reliability
If additional monitoring components are added to check sensor health, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by making the existing optical sensor and communication infrastructure serve dual purposes: both arc detection and self-checking. The same optical sensor that detects arcs also receives self-checking optical signals, and the same communication cables transmit both arc data and diagnostic signals. This eliminates the need for separate test hardware and reduces overall system complexity.
Solution Approach 2:
The system merges the arc detection function with the health monitoring function into a unified architecture. The processor combines arc signal processing with self-checking signal generation and analysis, and the optical communication channel carries both operational data and diagnostic information. This consolidation reduces component count and simplifies system structure while maintaining 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
The proposed solution effectively monitors the operational integrity of the arc detection sensor device and its components, preventing false failure alarms and ensuring the reliability and safety of high-power systems by timely detection of actual malfunctions.
Implementation Method 1
an optical sensor device 220 configured to sense the transmitted self-checking optical signal 2710
Data Source
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AI summary
A self-checking apparatus of an arc detection device includes: an arc detection controller including a processor configured to periodically generate a self-checking optical signal and transmit the self-checking optical signal to the optical sensor device, receive an optical signal corresponding to the self-checking optical signal through the first optical signal receiver from the optical sensor device, and determine whether there is abnormality in any one of the optical sensor device, a transmission optical cable, and a reception optical cable by comparing a reference optical signal with the optical signal.