Linear Revolving Door Panels for High Traffic Flow Control
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Solution Overview
Problem
Current security access control devices, such as revolving doors and turnstiles, are inefficient in high-traffic areas and fail to prevent individuals carrying weapons from entering secured spaces, as they do not offer flexible directional control and are space-inefficient, often leaving half of the width unused during peak times, and may impede traffic flow.
Innovation Solution
An electromechanical and electronically controlled linear revolving door system that allows unidirectional flow, can be stacked for increased throughput, and incorporates sensors for threat detection, with door panels that adjust speed to match pedestrian pace, and filler panels to prevent weapon passage, constructed from bulletproof materials for enhanced security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional revolving door is used to allow continuous bidirectional traffic flow, then safety and energy efficiency are improved, but space utilization deteriorates as half the width remains unused during peak directional flow times
Solution Approach 1:
The patent applies dynamics by making the door panels electronically controllable to change direction dynamically. The system can switch from bidirectional to unidirectional flow based on traffic patterns, allowing full utilization of the door width in the dominant direction while maintaining the ability to reverse flow when needed.
Solution Approach 2:
The patent implements multi-functionality by enabling the same door structure to operate in multiple modes: bidirectional continuous flow mode for normal operation and unidirectional controlled flow mode for peak directional traffic. This allows the system to adapt to different traffic scenarios using a single device.
2Reliability
If a conventional revolving door is stopped and reversed to prevent a weapon-carrying person, then security is improved, but traffic flow deteriorates as other persons are stuck or forced to back up
Solution Approach 1:
The patent applies segmentation by dividing the door into multiple independently controlled panels. This allows the system to stop or reverse only the affected panel while other panels continue to operate, preventing weapon passage without disrupting overall traffic flow for other persons.
Solution Approach 2:
The patent uses dynamic control to selectively stop or reverse individual door panels based on detected threats. The electronic control system can respond to security threats by adjusting the operation of specific panels while maintaining continuous operation of other panels, thus preserving traffic flow.
3Reliability
If full height turnstiles with multiple crossbars are used to stop perpetrators, then security is improved, but traffic flow deteriorates and space efficiency worsens due to stationary construction requiring series placement
Solution Approach 1:
The patent replaces stationary turnstiles with dynamically controllable door panels that can open and close in sequence. This dynamic operation allows continuous traffic flow while maintaining the ability to stop perpetrators, eliminating the need for series placement and improving both productivity and space efficiency.
4Measurement precision
If identification mechanisms such as cards or fingerprints are used to control access, then identification accuracy is improved, but security deteriorates as perpetrators with authorized identification can still enter
Solution Approach 1:
The patent introduces an intermediary physical barrier (electronically controlled door panels) between identification and access. Even with correct identification, the door panels can be electronically controlled to prevent passage if a threat is detected, adding a layer of security that operates independently of identification status.
Data Source
AI summary
Electro-mechanical and electronically controlled access devices are described for controlling access to a building, premises or area in a secure manner such that a subject who is deemed ineligible for access will be barred entry and may be optionally retained. The devices can contain multiple rotatable door panels, which can be positioned behind one another. The door panels can be controlled by mechanized arms or other control devices in order to control the passage through the device. The direction of flow through a device according to these embodiments is electronically controlled and may be changed at any point in time. At any instant in time, the flow through the device is unidirectional. Multiple devices can be stacked together to form clusters, which can be controlled according to traffic, time of day, or other factors.