Emergency Lighting System Using Power Over Ethernet
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Solution Overview
Problem
Existing emergency lighting systems require extensive and costly installations to integrate network components and power supplies, especially in difficult-to-access areas, limiting their cost-effective integration into Power over Ethernet (PoE) network structures.
Innovation Solution
The emergency lighting system utilizes Ethernet cables for both data transmission and power supply, segmenting the network to assign backup power supplies to each segment, integrating mains power supply and backup power supply into the network structure, and using Power over Ethernet (PoE) technology to distribute power and data efficiently, eliminating the need for additional devices and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate installations are used to connect network components and power supplies, then reliable power supply is achieved, but installation effort and cost increase significantly
Solution Approach 1:
The patent combines network data transmission and power supply functions into a single Ethernet cable infrastructure. The PoE (Power over Ethernet) technology integrates both data and power delivery through the same cable, eliminating the need for separate power installations and reducing overall system complexity while maintaining reliable power supply to network components.
Solution Approach 2:
The Ethernet cable is designed to serve multiple functions simultaneously: data transmission and power delivery. This multi-functional approach allows the same infrastructure to support both networking and power supply requirements, reducing installation complexity and cost while ensuring reliable operation of emergency lighting components.
2Device complexity
If Power over Ethernet (PoE) is used for power supply, then installation cost and effort are reduced, but available power is limited to low voltage and current
Solution Approach 1:
The patent segments the emergency lighting system into modular network components that can be individually powered by PoE. By dividing the system into smaller, independently powered units (escape sign lights, safety lights, monitoring devices), the design accommodates PoE's power limitations while maintaining overall system functionality through distributed power delivery across multiple segments.
Solution Approach 2:
The patent introduces PoE-powered network components as intermediaries between the Ethernet infrastructure and the emergency lighting functions. These components receive limited PoE power and use it to operate low-power LED lighting and control functions, effectively bridging the gap between PoE's limited power capacity and the emergency lighting system's requirements.
3Reliability
If multiple separate charging devices are used for each battery, then each light can operate independently, but the number of charging devices increases
Solution Approach 1:
The patent merges multiple individual charging functions into a single centralized charging infrastructure. The PoE-powered network components share a common power source and charging mechanism through the Ethernet network, reducing the total number of charging devices from one per light to a single centralized power delivery system that serves all components.
4Ease of operation
If self-contained lights with integrated batteries are used, then each light is autonomous, but installation and maintenance complexity increases
Solution Approach 1:
The patent extracts the battery and power management functions from each individual light and consolidates them into a centralized PoE power supply system. This removes the need for integrated batteries in each self-contained light, simplifying the overall system architecture while maintaining operational autonomy through networked power delivery and centralized monitoring.
Data Source
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AI summary
An emergency lighting system comprises a network structure and a plurality of network components, such as safety lights, emergency exit lights, light switch monitoring devices, mains voltage monitoring devices, or the like. Furthermore, the emergency lighting system has at least one mains power supply and one backup power supply. The network components are interconnected via at least one cable connection, at least for data transmission. The cable connection is an Ethernet cable, which is used not only for data transmission but also for powering the network components. The invention further relates to a corresponding method for supplying an emergency lighting system with power and data.