Outlet-Based Electrical Discharge Detection via Transient Signal Analysis
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Solution Overview
Problem
Existing technologies like arc-fault circuit interrupters (AFCIs) are expensive and require installation on each circuit to detect early-stage electrical discharges in electrical wiring, failing to provide long-term monitoring and distinguish between discharge severity levels, and are not suitable for widespread implementation.
Innovation Solution
A system that uses a single monitoring device plugged into an existing electrical outlet to detect early-stage electrical discharges by analyzing transient signals in electrical wiring, leveraging power line communication techniques and machine learning to identify discharge severity and alert potential fire dangers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If arc-fault circuit interrupters (AFCIs) are installed on each circuit to detect early-stage electrical discharges, then detection reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple circuit monitoring functions into a single monitoring device that plugs into one electrical outlet. This single device can detect electrical discharges across the entire electrical system by analyzing voltage waveforms through the power distribution network, eliminating the need for multiple AFCIs installed on each circuit while maintaining detection reliability
Solution Approach 2:
The monitoring device is designed with multi-functionality, serving as both a standard electrical outlet device and a comprehensive electrical system monitor. It can detect various types of electrical discharges (series arcs, parallel arcs, ground pyrolysis, last strand events) and provide long-term monitoring capabilities, making it a universal solution that replaces multiple specialized devices
2Measurement precision
If arc-fault circuit interrupters (AFCIs) are installed on each circuit to detect early-stage electrical discharges, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The monitoring device automatically performs discharge detection, analysis, and severity classification without requiring user intervention. It self-calibrates by analyzing voltage waveforms, automatically identifies different discharge types (series arcs, parallel arcs, ground pyrolysis), and provides continuous monitoring, eliminating the complexity of manual installation and operation of multiple AFCIs
3Reliability
If traditional AFCI systems are used to detect electrical discharges, then early detection capability is improved, but long-term monitoring capability deteriorates
Solution Approach 1:
The monitoring device provides continuous, uninterrupted monitoring of electrical discharges over extended periods. It continuously analyzes voltage waveforms, tracks discharge patterns over time, and maintains detection capability throughout the device's operational life, enabling long-term monitoring that traditional AFCI systems cannot provide
4Ease of operation
If a single monitoring device is used instead of multiple AFCIs, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The monitoring device uses the electrical wiring system itself as an intermediary to detect discharges throughout the entire electrical network. By analyzing voltage waveforms through the power distribution network, it can identify discharges occurring at any location in the system, achieving comprehensive detection precision with a single device
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 early detection and long-term monitoring of electrical discharges, distinguishing severity levels, and provides rapid notification of potential fire hazards through a cost-effective, single-device solution.
Implementation Method 1
A sensor device coupled to a branch circuit detect one or more signal waveforms generated by electrical activity on the branch circuit
Implementation Method 2
AFCIs detect arc faults in a circuit and breaks the circuit upon detection of such faults to prevent an electrical fire from happening
Data Source
Figure 1A~1B
Figure 1C
Figure 2
AI summary
Described herein are methods and systems for detecting electrical discharges that precede electrical fires in electrical wiring. One or more sensor devices coupled to a circuit detect one or more signal waveforms generated by electrical activity on the circuit. The sensor devices identify one or more transient signals within the one or more signal waveforms, and generate one or more transient characteristics based upon the identified transient signals. A server communicably coupled to the sensor devices receives the one or more transient characteristics. The server analyzes the one or more transient characteristics to identify one or more electrical discharge indications. The server generates one or more alert signals when one or more electrical discharge indications are identified.