Aircraft Emergency Lighting Using Rechargeable Capacitors
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Solution Overview
Problem
Conventional emergency lighting systems in aircraft require frequent maintenance due to the short lifespan of batteries and complex wiring, leading to increased downtime and safety concerns.
Innovation Solution
The implementation of an emergency lighting system using rechargeable capacitors as power sources for autonomous emergency light units, which are charged during normal operation and can operate independently in emergency situations, reducing the need for batteries and simplifying wiring by using a single power connection for both power and control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional batteries are used as power sources in emergency lighting systems, then the system can provide emergency lighting, but the maintenance efforts increase and the system lifespan decreases
Solution Approach 1:
The patent changes the fundamental parameter of the power storage device from battery chemistry to capacitor technology. This parameter change enables the system to achieve significantly longer operational lifespan (capacitors can last decades compared to battery years) and eliminates maintenance requirements, as capacitors do not degrade through chemical reactions like batteries do.
Solution Approach 2:
The patent inverts this principle by using durable, long-lasting capacitors instead of short-lived batteries. The capacitors are designed to last the entire operational life of the aircraft without replacement, eliminating the recurring maintenance and replacement costs associated with batteries.
2Ease of operation
If complex wiring is used in emergency lighting systems, then power and control can be provided to multiple light units, but the system complexity increases and vulnerability to wiring damages increases
Solution Approach 1:
The patent segments the control functionality by integrating the control unit directly into each autonomous emergency light unit. Each light unit contains its own control circuitry that can independently process control signals received via the power line, eliminating the need for separate control wiring and reducing overall system complexity while maintaining full control functionality.
Solution Approach 2:
The patent makes the power line universal by enabling it to carry both power transmission and control signal functions simultaneously. The control unit in each light unit can decode control signals embedded in the power line voltage, allowing a single wiring infrastructure to serve multiple purposes and reduce the need for additional dedicated control wiring.
3Use of energy by moving object
If batteries are used in emergency lighting systems, then emergency power can be stored, but safety issues arise due to hazardous materials
Solution Approach 1:
The patent replaces the electrochemical system of batteries with an electrostatic system using capacitors. Capacitors store energy electrostatically in an electric field between conductive plates separated by a dielectric, rather than through chemical reactions. This substitution eliminates hazardous materials such as acids, heavy metals, and flammable electrolytes found in batteries, while maintaining emergency power storage capability.
4Ease of manufacture
If conventional batteries with short lifespan are used, then the emergency lighting system can be implemented, but frequent maintenance and replacement are required
Solution Approach 1:
The patent implements preliminary action by designing the capacitor-based power storage system to last the entire operational lifespan of the aircraft without requiring maintenance or replacement. The capacitors are pre-configured to provide emergency power for the full service life of the aircraft, eliminating the need for periodic maintenance interventions and associated downtime.
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
This solution significantly reduces maintenance efforts, extends the lifespan of the system, enhances reliability, and ensures continuous emergency lighting even with wiring damages, as capacitors have a longer lifespan and are safer than batteries, with fewer hazardous materials and a broader temperature range.
Implementation Method 1
Each of the plurality of autonomous emergency light units comprises at least one LED and a rechargeable capacitor
Data Source
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Figure 2a
Figure 2b
AI summary
An emergency lighting system (100) for an aircraft includes an emergency light control unit (200), having an external power input (204) and at least one external control input (202a, 202b) for receiving external control commands from at least one of a cockpit crew, a cabin crew, a board computer and an autopilot, and a plurality of autonomous emergency light units (2), each of the plurality of autonomous emergency light units (2) comprising at least one LED (10) and a rechargeable capacitor (8). The emergency light control unit (200) is configured to process the external control commands and to communicate emergency light control commands to the plurality of autonomous emergency light units (2) as a response to the external control commands.