Wireless Mesh Emergency Lighting With Staggered Group Testing
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Solution Overview
Problem
Existing emergency lighting systems in buildings require frequent testing, which can be cumbersome due to the need for physical wiring, especially in old structures, and may cause all devices to be unavailable for genuine emergencies if tested simultaneously.
Innovation Solution
A wireless mesh network system allowing emergency devices to communicate and test autonomously without hardwiring, with a controller that establishes preferred and alternative communication links to ensure continuous functionality and staggered testing to prevent simultaneous device unavailability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless mesh network communication is implemented, then installation complexity is reduced and ease of operation is improved, but system reliability may be compromised due to potential communication link failures
Solution Approach 1:
The system dynamically adapts communication paths by monitoring link quality and automatically switching between preferred and alternative routes. The mesh network topology allows devices to dynamically reroute signals through different nodes when communication quality degrades, maintaining reliable data transmission without requiring manual reconfiguration or complex wired infrastructure.
2Productivity
If all emergency devices are tested simultaneously, then testing efficiency is improved, but system reliability deteriorates as all devices become unavailable during testing
Solution Approach 1:
The system segments the emergency device population into multiple groups that can be tested independently and simultaneously. The controller divides devices into separate testable groups, allowing parallel testing operations across different segments while ensuring that at least one group remains operational for genuine emergencies. This segmentation approach maintains both testing productivity and system reliability.
3Reliability
If hardwired communication is used, then system reliability is improved through stable connections, but installation complexity and device complexity increase significantly
Solution Approach 1:
The system replaces the mechanical wired communication infrastructure with wireless mesh network technology. Instead of relying on physical cables and connectors that require complex installation and modification of building infrastructure, the patent implements wireless transceivers that communicate through radio frequency signals, eliminating the need for extensive wiring while maintaining communication reliability through protocol-level error correction and redundancy.
4Productivity
If preferred communication links are established, then communication efficiency is improved, but system adaptability decreases when preferred links fail
Solution Approach 1:
The system prepares for potential link failures by pre-establishing alternative communication paths alongside preferred links. When a preferred communication route becomes unavailable, the mesh network automatically activates pre-configured alternative routes, ensuring continuous operation without interruption. This beforehand cushioning approach maintains adaptability while preserving communication efficiency through optimized primary paths.
Data Source
AI summary
An emergency system for providing an emergency function is described in which the system is required to provide an autonomous and self-diagnostic capability so the system can be tested when not in operation in an emergency situation. A plurality of emergency devices 14 are provided which have transmitters and receivers for producing a mesh network (FIG. 1). Each device 14 has a processor 60 for establishing a preferred wireless communication link of the mesh network to another device 14 for relaying signals and messages. The devices 14 are arranged in subnets 50 and the subnets are also grouped into groups of devices 14 which may cross various subnets 50 so that only one group of devices 14 can be tested at a particular time.