Distributed Electronic Door Locks for Rapid Emergency Lockdown
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Solution Overview
Problem
Traditional access control systems face challenges in quickly and reliably locking down doors during emergencies, such as active shooter situations, due to long response times and single points of failure in centralized control systems, and lack flexibility in controlling specific sets of wireless locks.
Innovation Solution
The system employs a distributed lockdown mechanism using wireless Action Buttons and Electronic Door Locks with far-field communication capabilities, allowing for immediate, decentralized lockdown of doors through a network of interconnected devices, including LR-Ekeys and routers, and includes features like Reflex Lockdown for automatic activation based on multiple signal inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centralized control system is used for lockdown, then system management is simplified, but response time increases and single points of failure are created
Solution Approach 1:
The system divides the centralized control architecture into distributed control units at each door location. Each Electronic Door Lock (EDL) and Action Button (AB) pair operates autonomously, with ABs sending direct commands to EDLs without requiring central server intervention. This segmentation eliminates the single point of failure at the central controller and enables immediate local response to emergency inputs.
Solution Approach 2:
The patent introduces wireless communication intermediaries (routers and wireless transceivers) that enable direct communication between Action Buttons and Electronic Door Locks. This intermediary layer allows distributed devices to exchange commands and status information autonomously, bypassing the need for centralized control while maintaining system coordination through the wireless network.
2Adaptability or versatility
If wireless door locks are used, then flexibility in controlling specific sets of doors is improved, but system complexity increases
Solution Approach 1:
The Electronic Door Locks and Action Buttons are designed as universal wireless devices that can function independently or in coordinated groups. Each EDL can be individually controlled by its associated AB, while also being part of larger zone-based lockdown groups. This multi-functionality allows the same hardware to provide both individual door control and area-wide lockdown capabilities without requiring different device types.
Solution Approach 2:
The system adds a wireless communication dimension to traditional access control, transitioning from wired hierarchical control to wireless peer-to-peer communication. This dimensional change enables flexible grouping of doors into zones that can be locked down independently or collectively, providing spatial adaptability without increasing physical system complexity through extensive wiring.
3Reliability
If Reflex Lockdown with multiple signal inputs is implemented, then automatic activation reliability is improved, but device complexity increases
Solution Approach 1:
The system merges multiple simple signal inputs from different Action Buttons into a coordinated lockdown response. When multiple ABs within a defined time window send lockdown commands, the system combines these signals to trigger Reflex Lockdown, activating multiple EDLs simultaneously. This merging approach achieves reliable automatic activation through simple signal aggregation rather than complex decision logic.
Solution Approach 2:
The system pre-configures zones and time windows for Reflex Lockdown operation before emergencies occur. Administrators define which ABs belong to which zones and set the time thresholds for automatic activation. This preliminary configuration stores the complexity in advance, allowing the system to execute simple real-time comparisons during emergencies without requiring complex processing at the moment of activation.
Data Source
AI summary
An electronic lock can enter a lockdown mode in response to a lockdown command comprising a mechanical command, e.g. a button or door handle being pressed on the lock in a predefined time-series sequence, or touching the lock in a time-series sequence). Alternatively, an audio or visual command can be issued, e.g. saying certain words or making a hand gesture. The lock may require additional authentication before executing the lockdown command, e.g. recognizing an authorized electronic key. Other embodiments are also provided.