Optical Fiber Cassette with Pre-Strain Spooling for Sensor Installation
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Solution Overview
Problem
The installation of fiber optic sensors on structures for structural health monitoring is challenging due to the fragility and delicacy of the sensors, requiring careful handling to avoid breaks and tangles, and existing methods are not efficient for rapid and reliable deployment, especially in harsh environments and limited working spaces.
Innovation Solution
A system and method for controlled and semi-automatic installation of fiber optic sensors using a cassette and sub-spooling system, which includes a fiber monitor for tracking sensor placement and tension, and an installation tool with adhesive dispensing capabilities, allowing for flexible attachment to various substrates and enabling unskilled labor to safely install sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual installation methods are used for fiber optic sensors, then installation flexibility is maintained, but installation speed decreases and manual errors increase
Solution Approach 1:
The patent introduces a spooling system with a cassette as an intermediary device between the fiber optic reel and the installation point. This intermediary system provides controlled fiber dispensing with tension management, preventing manual handling errors while maintaining installation flexibility. The cassette acts as a mediator that protects the fragile fiber during rapid deployment.
Solution Approach 2:
The system pre-configures the fiber optic cable on a spool within the cassette before installation begins. This preliminary arrangement allows for controlled dispensing during installation, eliminating the need for manual coiling and handling. The pre-prepared spooling system enables rapid deployment while maintaining fiber integrity through consistent tension control.
2Productivity
If rapid installation is pursued, then productivity increases, but the risk of fiber breaks and tangles increases
Solution Approach 1:
The spooling system with tension control mechanisms serves as an intermediary that manages fiber dynamics during rapid installation. The system includes guides and tensioners that prevent tangles and breaks even at high installation speeds, acting as a protective intermediary between the moving installation process and the fragile fiber.
Solution Approach 2:
The system employs dynamic tension control and movable guides that adapt during installation. The spooling mechanism can adjust its characteristics during the installation process to maintain optimal fiber tension and routing, preventing breaks and tangles while enabling rapid deployment. The dynamic adjustment of installation parameters maintains fiber integrity throughout the process.
3Productivity
If automated installation systems are implemented, then installation efficiency improves, but system complexity increases
Solution Approach 1:
The patent divides the automated installation system into separate functional modules: a spooling system for fiber management, a cassette for storage and dispensing, tension control mechanisms, and installation tools. This segmentation allows each component to perform its specific function with simple, well-defined mechanics, reducing overall system complexity while maintaining high installation efficiency.
Solution Approach 2:
The cassette and spooling system are designed as multi-functional units that can be used for different fiber optic installation scenarios. The same basic system can handle various fiber types, lengths, and installation environments, reducing the need for multiple specialized devices and thereby reducing overall system complexity while maintaining versatility and efficiency.
4Reliability
If careful manual handling is used, then sensor integrity is maintained, but installation time increases
Solution Approach 1:
The spooling system with cassette acts as an intermediary that automates the careful handling previously required in manual installation. It provides consistent tension control and guided fiber routing that protects sensor integrity while operating at much higher speeds than manual handling, thereby reducing installation time without sacrificing reliability.
Solution Approach 2:
The system is designed to automatically manage fiber handling without requiring skilled manual intervention. The spooling mechanism, tension controllers, and guides work together in a self-regulating manner to protect fiber integrity throughout installation. This self-service capability maintains sensor integrity while eliminating the time-consuming nature of careful manual handling.
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
Facilitates rapid, reliable, and robust installation of fiber optic sensors on structures, ensuring accurate strain measurement and maintaining sensor integrity, even in constrained environments, while reducing manual errors and downtime.
Implementation Method 1
an adhesive dispenser capable of dispensing at least one adhesive
Data Source
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AI summary
An apparatus has a cassette (201) configured to hold optical fiber (242) comprising one or more optical sensors. The cassette (201) has a spool (222) configured to one or more of extract and retract the optical fiber (242) from the cassette (201). A pre-strain mechanism is configured to apply a predetermined pre-strain to the one or more optical sensors. An optical fiber installation tool is configured to mount the optical fiber (242) comprising the one or more pre-strained optical sensors to a surface.