Fiber Optic Smoke Detection System Using Light Scattering
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Solution Overview
Problem
Conventional smoke detection systems face delays in detecting fire due to smoke transport time and dilution in pipe network systems, leading to potential failure in activating fire suppression systems.
Innovation Solution
A fiber optic detection system that uses a fiber harness with nodes connected to a control system to analyze scattered light for the presence and magnitude of smoke or fire, allowing for early detection and localization of hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pipe network system is used to transport smoke to a remote detector, then the detection can be performed at a centralized location, but the smoke transport time causes delays in detection
Solution Approach 1:
The patent replaces the mechanical pipe network transport system with an optical detection system. Fiber optic cables are positioned to directly sample smoke at multiple locations within the protected space, eliminating the need to physically transport smoke through pipes to a remote detector. The light scattering detection method allows for immediate local measurement of smoke particles without mechanical transport delays.
Solution Approach 2:
The patent transitions from a centralized point detection approach to a distributed spatial detection network. Multiple fiber optic sensing points are distributed throughout the protected space, enabling simultaneous detection at multiple locations rather than transporting smoke to a single remote detector. This dimensional distribution eliminates transport time and provides spatial localization of smoke sources.
2Reliability
If smoke is drawn through a pipe network to a remote detector, then the detection can be centralized, but the smoke mixes with clean air causing dilution below detection threshold
Solution Approach 1:
The patent replaces the mechanical smoke transport and mixing process with direct optical sampling at the smoke source locations. Fiber optic cables positioned within or near the protected space sample smoke particles in situ, eliminating the dilution that occurs when smoke mixes with clean air during transport through pipe networks. The light scattering detection occurs directly at the sampling points where smoke concentration is highest.
3Reliability
If individual sensor units are positioned at each sensing location, then the detection coverage is improved, but the system complexity and cost increase
Solution Approach 1:
The patent merges multiple distributed sensing functions into a unified fiber optic detection system. Instead of installing separate electronic sensor units at each location, a single fiber optic cable network carries light through multiple sensing points, with all detection functions integrated into the optical system and centralized control electronics, reducing overall system complexity while maintaining distributed coverage.
Solution Approach 2:
The fiber optic cable system serves multiple functions simultaneously: it acts as both the light transmission medium and the sensing element distributed throughout the protected space. The same fiber infrastructure provides detection coverage at multiple locations without requiring separate dedicated sensors at each point, reducing system complexity while maintaining comprehensive detection capability.
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
The system enables timely and accurate detection of smoke and fire, reducing exposure to hazardous conditions and improving the reliability of fire suppression systems by localizing the source of the threat.
Implementation Method 1
a fiber harness having at least one fiber optic cable for transmitting light
Implementation Method 2
the control system analyzes the scattered light to determine at least one of a presence and magnitude of the one or more conditions at the node
Data Source
AI summary
A detection system for measuring one or more conditions within a predetermined area includes a fiber harness having at least one fiber optic cable for transmitting light, a plurality of nodes operably connected to the at least one fiber optic cable arranged to measure one or more conditions within the predetermined area, a coupling to connect each node of the plurality of nodes to the at least one fiber optic cable, and a control system operably coupled to the fiber harness such that scattered light associated with the node is transmitted to the control system, wherein the control system analyzes the scattered light to determine at least one of a presence and magnitude of the one or more conditions at the node.