Fiber Optic Smoke Detection via Light Scattering
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Solution Overview
Problem
Conventional smoke detection systems face delays in detecting fire due to smoke transport time through pipe networks and dilution of smoke with clean air, leading to potential failure in activating fire suppression systems.
Innovation Solution
An integrated communication and smoke detection system utilizing fiber optic cables with nodes that transmit light to measure conditions, allowing for real-time detection and communication of smoke presence through modulated light, enabling faster and more accurate fire detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pipe network is used to transport smoke to a remote detector, then the detection can be centralized, but smoke transport time causes delays in detection
Solution Approach 1:
The patent replaces the mechanical smoke transport system (pipes and fans) with an optical detection system. Light from a laser source travels directly to the monitoring location through fiber optic cables, eliminating the need to physically transport smoke through pipes. This substitution of mechanical transport with optical transmission resolves the time delay issue while maintaining centralized detection capability.
Solution Approach 2:
The patent introduces light as an intermediary substance to detect smoke particles. Instead of transporting smoke through pipes, light is sent through the environment being monitored, and smoke particles are detected by analyzing the scattered light. This intermediary approach eliminates transport delays while enabling remote monitoring.
2Reliability
If smoke is drawn through a pipe network, then centralized detection is achieved, but smoke mixes with clean air causing dilution below detection threshold
Solution Approach 1:
The patent replaces the mechanical smoke drawing system with an optical scattering detection system. Instead of actively drawing smoke through pipes where it mixes with clean air, the system uses light scattering to detect smoke particles in place. This eliminates the dilution problem while maintaining centralized detection capability.
Solution Approach 2:
The patent uses light scattering to create an optical copy or representation of the smoke presence. By analyzing how light scatters when it encounters smoke particles, the system can detect smoke concentration without physically transporting the smoke itself, thereby avoiding dilution with clean air.
3Measurement precision
If individual sensor units are positioned at each sensing location, then local detection is achieved, but system complexity increases with separate processing components
Solution Approach 1:
The patent implements a universal light transmission and detection system that can serve multiple sensing locations through a single fiber optic cable network. The same laser source and detection mechanism can monitor multiple locations by routing light through different paths, eliminating the need for separate processing components at each location while maintaining local detection accuracy.
Solution Approach 2:
The patent merges multiple detection functions into a single centralized processing system. Instead of having separate sensor units with independent processing at each location, the system combines all detection capabilities through a unified fiber optic network that routes optical signals to a central analysis point, reducing overall system complexity.
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 provides timely and accurate detection of smoke and fire, reducing false alarms and enhancing the effectiveness of fire suppression systems by localizing the source of smoke and communicating critical information through the fiber optic network.
Implementation Method 1
a fiber harness having at least one fiber optic cable for transmitting light
Implementation Method 2
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
Implementation Method 3
The control system is configured to allow multiple inputs and outputs for communication of information through the fiber harness and node using modulated light
Data Source
AI summary
An integrated communication and smoke detection system includes a fiber harness having at least one fiber optic cable for transmitting light, the at least one fiber optic cable defining a node arranged to measure one or more conditions at a predetermined area. A light source is operably connected to the fiber harness to transmit light along the at least one fiber optic cable to the node. 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. The control system is configured to allow multiple inputs and outputs for communication of information through the fiber harness and node using modulated light.