Conductive Shielded UAV Contact With Energized Power Lines
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Solution Overview
Problem
Current methods for maintaining and inspecting high voltage power lines are time-consuming and pose safety hazards for linemen, with manned helicopter usage being expensive and restricted, and existing UAV technologies do not allow safe contact with energized conductors.
Innovation Solution
A remotely controlled UAV system with a suspension system and an electrically conductive shield that encapsulates the UAV, power source, and attachments, enabling safe contact with energized conductors by matching voltage potential and protecting against voltage surges, using a Faraday cage made from fire retardant and metallic fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a UAV is used to inspect and maintain power lines, then productivity and safety are improved, but the UAV cannot safely contact energized conductors without protection
Solution Approach 1:
An electrically conductive shield acts as an intermediary between the UAV and energized conductors. The shield encapsulates the UAV and provides a controlled electrical interface, allowing the UAV to bond-on to energized lines without exposing internal electronics to dangerous voltage surges. This mediator enables safe contact while maintaining operational capability.
Solution Approach 2:
The electrically conductive shield changes the electrical parameters of the UAV system by providing a controlled bonding interface. When the UAV contacts an energized conductor, the shield manages the voltage transition and current flow, transforming the dangerous uncontrolled electrical contact into a safe controlled electrical connection.
2Reliability
If Faraday shielding is used to protect UAV electronics from magnetic fields, then reliability is improved, but weight increases
Solution Approach 1:
The electrically conductive shield is constructed from composite materials including fire retardant fibers and metallic fibers. This composite structure provides both the electrical conductivity needed for safe bonding to energized conductors and the fire resistance required for operation near high voltage lines, while attempting to minimize weight through material selection.
Solution Approach 2:
The shield is implemented as a flexible encapsulating shell that can conform to the UAV structure. This thin-film approach provides comprehensive electrical and fire protection while minimizing the added weight compared to rigid shielding structures.
3Ease of operation
If manned helicopters are used to lower linemen onto powerlines, then access to energized conductors is improved, but cost and safety risks increase
Solution Approach 1:
The invention replaces the mechanical helicopter system with an autonomous UAV system. The UAV can independently navigate to and contact energized conductors, eliminating the need for helicopter transport of linemen. The electrically conductive shield enables this autonomous operation by providing safe electrical bonding capability.
Solution Approach 2:
The UAV system is self-sufficient and does not require human operators in hazardous positions. The autonomous UAV can perform inspection and maintenance tasks while bonding to energized conductors, with the electrically conductive shield providing self-protection against voltage surges and electrical hazards.
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 safe and controlled operation of UAVs near high voltage power lines, protecting them from voltage surges and unintended contact, allowing for efficient maintenance, testing, and inspection without power outages.
Implementation Method 1
An electrically conductive shield adapted to be operatively coupled to, and so as to encapsulate, the UAV, the suspension system, the attachment, and the power source or power sources
Implementation Method 2
Faraday shielding 122 is used to cover the electrical components of the power UAV from magnetic fields
Data Source
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AI summary
A remotely controlled unmanned aerial device for use in proximity or in contact with high voltage powerlines, includes an unmanned aerial vehicle and an electrically conductive shield forming part of or operatively coupled to so as to encapsulate the unmanned aerial vehicle. When in the presence of a high voltage powerline, the unmanned aerial vehicle either when bonded-on or within the corresponding magnetic fields of the powerline, so as to transfer the powerline potential in whole or in part to the unmanned aerial vehicle, electrically energizes the conductive shield around the unmanned aerial vehicle while leaving components of the unmanned aerial vehicle within the shield substantially electrically unaffected by the voltage potential.