Hybrid Cable Layout for Power, Fiber, and Damage Detection
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Solution Overview
Problem
Current cabling solutions for electronic devices in outdoor environments require separate installation of power and communication cables, leading to increased installation costs and potential damage over long distances, necessitating a hybrid cable that combines power conductors and optical fibers while incorporating damage detection mechanisms.
Innovation Solution
A hybrid cable design featuring a central strength member with larger power conductors and multiple buffer tubes for optical fibers, along with smaller gauge conductors for damage detection, is developed. This cable includes a concentric core with water-blocking tapes and a shielding layer to enhance durability and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power cable and communication cable are installed, then power transmission and communication transmission can be achieved, but installation cost increases and maintenance complexity increases
Solution Approach 1:
The patent combines power conductors and optical fibers into a single hybrid cable structure, merging two separate cable systems (power cable and communication cable) into one integrated solution. This reduces installation complexity by eliminating the need to install and manage two separate cables while maintaining both power transmission and communication transmission functions simultaneously.
Solution Approach 2:
The hybrid cable serves multiple functions within a single structure: it transmits electrical power through copper conductors and simultaneously transmits optical communication signals through optical fibers. This multi-functional design eliminates the need for separate dedicated cables for each function, reducing overall system complexity.
2Adaptability or versatility
If hybrid cable with multiple components is used, then both power and communication transmission are achieved, but cable roundness and storage efficiency deteriorate
Solution Approach 1:
The patent employs a nested concentric core structure where the optical fiber buffer tubes are positioned in the spaces between concentric rings of power conductors. This nesting arrangement allows multiple functional components to be integrated while maintaining a compact, round cable cross-section that is efficient for storage and handling.
Solution Approach 2:
The cable design uses filler rods in specific locations within the concentric core structure to maintain circular geometry and improve roundness. These localized structural elements ensure the cable maintains its shape without compromising the functionality of the power and communication components.
3Productivity
If cable extends over long distance to serve multiple devices, then more devices can be powered, but damage risk increases
Solution Approach 1:
The patent incorporates damage detection conductors that continuously monitor the integrity of the hybrid cable. When the cable is damaged, these detection conductors provide feedback signals to alert the system, enabling timely response and maintenance. This feedback mechanism maintains reliability by detecting issues early in long-distance cable installations serving multiple devices.
Solution Approach 2:
The damage detection conductors are pre-installed within the hybrid cable structure before deployment. This preliminary inclusion of monitoring capability allows the system to proactively detect cable damage rather than waiting for failure, improving reliability in long-distance applications.
Data Source
AI summary
A hybrid cable includes a central strength member, residing in a center of the cable. At least two insulated conductors are abutting the central strength member. One or more buffer tubes are included in the cable, each with at least one optical fiber. One or more filler rods are optionally included in the cable. A shielding layer and jacket surround the elements. In one embodiment, four large insulated conductors and two filler rods abut the central strength member. A first water-blocking tape surrounds the four large insulated conductors, filler rods and central strength member to form an inner core. A concentric core surrounds the central core. The concentric core includes two insulated conductors, plural buffer tubes and a second water-blocking tape surrounding the two insulated conductors and the plural buffer tubes. The shielding layer surrounds the concentric core, and the jacket surrounds the shielding layer. A toning signal carrying medium may also exist outside of the shielding layer.