Secure Exit Lane Door with Directional Motion Sensors
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Solution Overview
Problem
The challenge is to reduce the likelihood of unauthorized entry into secure areas through exit doors while minimizing the need for expensive and error-prone security personnel, and to report any attempts to enter or objects entering these areas.
Innovation Solution
A door system with sensors that detect movement direction within a corridor, automatically closing doors if movement is detected in an undesired direction, and a controller that sends control signals to manage door access and alert security personnel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If security personnel are stationed at exit doors to prevent unauthorized entry, then security is improved, but cost and manpower requirements increase
Solution Approach 1:
The patent replaces the mechanical system of human security personnel with an automated door system equipped with sensors, controllers, and actuators. The system uses motion detectors to sense unauthorized movement and automatically controls door positions to prevent access, eliminating the need for continuous human monitoring while maintaining security effectiveness.
Solution Approach 2:
The door system is designed to autonomously monitor and enforce security without human intervention. Sensors continuously detect motion in the corridor, the controller processes this information, and the system automatically adjusts door positions to block unauthorized access. The system serves itself by having built-in detection and response capabilities that operate independently.
2Reliability
If security personnel are stationed at exit doors to monitor and report unauthorized entry, then detection capability is improved, but human error and cost increase
Solution Approach 1:
The patent replaces human sensory and reporting capabilities with electronic motion sensors and control systems. The sensors provide continuous, objective detection of movement in the corridor, and the controller automatically processes this data to determine whether unauthorized access is attempted, eliminating human error in detection and reporting.
Solution Approach 2:
The system incorporates continuous feedback loops where motion sensors monitor the corridor, the controller receives real-time data about detected movement, and the system automatically responds by adjusting door positions. This closed-loop feedback mechanism ensures reliable detection and immediate response to unauthorized access attempts without requiring human interpretation or decision-making.
3Reliability
If automated sensor systems are used to detect unauthorized movement, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent divides the security system into distinct functional segments: motion sensors for detection, controllers for decision-making, and door actuators for physical access control. This segmentation allows each component to perform its specific function reliably while reducing the overall system complexity by creating modular, independently testable units with clear interfaces between them.
Data Source
AI summary
A door system is provided. The door system includes: a corridor sized to allow humans to move through the corridor, the corridor defined, at least in part by side walls, the corridor having a first end and a second end; a first door located at the first end, the first door configured to provide selective access between the corridor and a space outside of the corridor; a second door located at the second end, the second door configured to provide selective access between the corridor and a space outside of the corridor; and sensors configured to determine a direction of movement within the corridor, the sensors operatively connected to at least one of the first and second doors to cause at least one of the first and second doors to move to a closed position if any of the sensors detect a movement further than a threshold amount in an undesired direction.