Access Control System with Travel Time Based Door Unlocking
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Solution Overview
Problem
Access control systems require users to present credentials multiple times when moving between secured areas, which can be inconvenient and may lead to unauthorized access if doors are unlocked prematurely.
Innovation Solution
An access control system that detects movement at a first door, determines a travel time for the user to reach a second door, and automatically unlocks the second door after the travel time has elapsed, eliminating the need for the user to present credentials again, while relocking the door if not opened within a set time window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users are required to present credentials at each door, then security is improved, but ease of operation deteriorates
Solution Approach 1:
The system performs preliminary credential verification at the first door and uses this information to proactively unlock subsequent doors before the user reaches them. The access control system determines travel time from the first door to subsequent doors and unlocks those doors in advance, eliminating the need for repeated credential presentation while maintaining security through pre-authorization.
2Ease of operation
If doors are unlocked in advance, then ease of operation is improved, but reliability deteriorates due to premature unlocking
Solution Approach 1:
The system continuously monitors door status and user movement through sensors and door sensors. When a door is unlocked in advance, the system detects whether the user has actually arrived at that door through movement detection. If the user does not reach the unlocked door within an expected time frame, the system relocks it, providing feedback-based security adjustment.
Solution Approach 2:
The door unlock status is not static but dynamically adjusted based on real-time conditions. Doors are unlocked temporarily for a calculated duration based on travel time, and the system continuously updates door status based on user movement detection. This dynamic approach allows doors to be unlocked when needed while automatically relocking if the user does not arrive.
3Productivity
If multiple doors are unlocked simultaneously, then productivity is improved, but device complexity increases
Solution Approach 1:
The system segments the door unlocking process into discrete, manageable steps based on individual doors and their specific unlock conditions. Each door is controlled independently with its own unlock timing and duration, allowing the system to manage multiple doors through modular, segmented control rather than complex simultaneous coordination.
Data Source
AI summary
An access control system detects movement at a door to which a user has been granted access. A travel time is determined that describes how long the user is expected to need to travel between that door and another door in the area. After the travel time has elapsed, the other door is unlocked. Thus, the user can travel to and open the other door without having to present a credential for the other door.