Leaky Feeder LED Lighting for Mine Emergency Illumination
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Solution Overview
Problem
In underground mines, emergency situations lead to total darkness due to the disconnection of power to prevent methane ignition, as personal headlamps have limited battery life and no backup power is available, making it difficult to maintain communication and navigation.
Innovation Solution
An LED lighting system that utilizes the power and communications capabilities of an existing leaky feeder infrastructure to provide continuous lighting, including escape way marking, emergency flash signals, and area illumination, independent of personal headlamps, and includes a housing with a c-shaped recess for clipping over a coax cable, an electrical assembly with an LED mountable, and a screw connector that interfaces with the coax cable to supply power and control the LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is disconnected to prevent methane ignition, then safety is improved, but lighting availability deteriorates
Solution Approach 1:
The system segments the electrical system into intrinsically safe leaky feeder communication lines that can operate at low voltages suitable for methane environments, and separates the lighting function from traditional high-voltage power distribution. LED lighting modules are powered through the intrinsically safe leaky feeder system, allowing lighting to continue operating during emergency power disconnection while maintaining safety in methane-prone areas.
2Weight of moving object
If personal headlamps with limited battery life are used, then portability is improved, but continuous lighting availability deteriorates
Solution Approach 1:
The system merges the communication infrastructure (leaky feeder) with the lighting power supply function. By combining these two functions into a single integrated system, the lighting modules can draw power continuously through the existing communication lines, eliminating the need for separate battery-powered headlamps while maintaining worker mobility and providing continuous illumination during emergencies.
3Device complexity
If no backup power supplies are available underground, then system simplicity is improved, but emergency lighting capability deteriorates
Solution Approach 1:
The leaky feeder system is designed to serve multiple functions: normal communication operations and emergency lighting power supply. This multi-functional approach eliminates the need for separate backup power systems while ensuring lighting capability during emergencies. The same infrastructure that provides communication also provides lighting power, simplifying the overall system while maintaining reliability.
4Ease of operation
If LED lighting modules are installed on existing coaxial cable infrastructure, then installation ease is improved, but electrical connection reliability deteriorates
Solution Approach 1:
The LED lighting modules are pre-configured with connection mechanisms designed to interface with standard coaxial cable structures. The modules include pre-formed electrical contacts and mounting features that align with the cable geometry, allowing installers to simply attach the module to the cable without complex wiring procedures. This preliminary design of the connection interface maintains both installation simplicity and electrical connection reliability.
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 LED lighting system ensures continuous availability of light for navigation and communication in emergency situations, using the existing leaky feeder system to power and control the LEDs, providing reliable area illumination and directional indication without the need for personal headlamps, and can be easily installed and removed as needed.
Implementation Method 1
LED lighting system that utilizes the power and communications capabilities of an existing leaky feeder infrastructure to provide continuous lighting
Data Source
AI summary
Methods, systems and devices for using a LED lighting system to communicate an emergency, indicate a route/pathway and illuminate an area using an existing leaky feeder communications system. The LED lighting system is powered by and may be controlled by the leaky feeder communications system that delivers 2-way communications and data. The LED lighting may be used as area wall location lighting, directional pathway indication, and area illumination. Control of the lighting system may be localized or remotely activated through hard wire or wireless connections. The system may controls dimming, pulsing, brightness, sequencing, and changing LED color.