Aerospace Fiber Optic Cable With Fluoropolymer Buffer
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Solution Overview
Problem
Fiber-optic cables used in aerospace applications face challenges such as limited size and weight constraints, harsh environmental conditions, and susceptibility to mechanical damage like crushing and pinching, which can lead to reduced light transmission and operational failures.
Innovation Solution
A multi-strand optical cable with a round form factor featuring a fluoropolymer buffer tube surrounded by an aramid and glass fiber strength member and an external fluoropolymer jacket, allowing optical fibers to float freely, providing increased resistance to mechanical forces and compatibility with high-density connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cable is designed with thicker strength member layers to withstand high crushing and pulling forces, then mechanical strength is improved, but the cable becomes too thick to meet bend radius requirements and becomes too difficult to install
Solution Approach 1:
The patent employs a fluoropolymer buffer tube that acts as a flexible protective shell around the optical fibers, allowing the cable to bend easily while maintaining fiber protection. This thin-film approach replaces the need for thick rigid strength member layers, enabling the cable to meet bend radius requirements while still providing adequate mechanical protection during installation and operation.
Solution Approach 2:
The patent uses composite materials including fluoropolymer buffer tube, aramid fibers, and glass fibers in a multi-layer construction. This composite structure provides high strength-to-weight ratio and excellent mechanical protection without requiring excessive thickness, allowing the cable to be both strong and flexible enough for easy installation in tight aerospace spaces.
2Weight of moving object
If the cable is designed to be lightweight and compact for aerospace applications, then size and weight are improved, but the cable becomes more susceptible to mechanical damage from crushing and pinching
Solution Approach 1:
The patent employs composite materials including aramid fibers (such as Kevlar) and glass fibers within the fluoropolymer buffer tube to provide high strength-to-weight ratio. These composite structures provide excellent resistance to crushing and pinching forces while maintaining the cable's lightweight characteristics suitable for aerospace applications.
Solution Approach 2:
The fluoropolymer buffer tube serves as a pre-applied cushioning layer that protects the optical fibers from mechanical damage before such damage can occur. This buffer tube absorbs and distributes crushing and pinching forces, preventing direct contact with the fragile fibers while maintaining the cable's lightweight design.
3Ease of operation
If the cable is designed with tight bend radius compatibility for installation in confined spaces, then ease of installation is improved, but the cable becomes more susceptible to kinking and reduced light transmission
Solution Approach 1:
The fluoropolymer buffer tube provides a flexible protective shell that allows the cable to be bent to tight radii for installation in confined aerospace spaces without causing kinks. This flexible structure maintains the integrity of the optical fibers during bending, preventing light transmission degradation while enabling easy installation in tight locations.
Solution Approach 2:
The patent designs the cable with dynamic flexibility, allowing the buffer tube to deform elastically during installation and operation. This dynamic response enables the cable to accommodate tight bend radiuses during installation while maintaining sufficient light transmission performance during normal operation, as the flexible structure prevents permanent kinking.
Data Source
AI summary
A fiber-optic cable for applications subject to extreme temperatures and high crushing and bending forces incorporating a loose fluoropolymer buffer material, a aramid/fiberglass strength member, and a fluoropolymer outer jacket compromising low smoke, low toxicity, and low flammability when exposed to flame.