Secure Digital Door Strike With Power-Line Communication
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Solution Overview
Problem
Existing door strikes are analog and require extensive rewiring for upgrading to digital systems, which is costly and impractical due to limited wiring and the need for new communication infrastructure.
Innovation Solution
A digital door strike device with an integrated Safetrust intelligent module that communicates over existing power lines, enabling secure, wireless communication with a door reader device, and includes door positioning and air pressure monitoring without rewiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a digital door strike device is installed to improve security, then security is improved, but extensive rewiring is required which increases installation cost and complexity
Solution Approach 1:
The existing power lines are made to serve dual purposes: both power delivery and digital communication. The door strike device communicates bidirectionally over the power lines using voltage modulation techniques, eliminating the need for separate data cabling and reducing installation complexity while maintaining security improvements
2Reliability
If communication is added to the door strike to prevent hacking, then security is improved, but more wires are required which increases installation difficulty
Solution Approach 1:
The power lines perform both power delivery and communication functions simultaneously. The controller modulates voltage on the power lines to encode digital messages, and the door strike device detects these voltage variations to receive commands and send status updates, eliminating the need for additional communication wiring
Solution Approach 2:
Voltage modulation serves as an intermediary mechanism to transfer digital information over the power lines. By encoding communication signals through voltage variations on the existing power infrastructure, the system enables secure bidirectional communication without requiring new communication cables
3Reliability
If encrypted communication is implemented to prevent remote hacking, then security is improved, but communication infrastructure complexity increases
Solution Approach 1:
The power lines are utilized for both power delivery and encrypted digital communication. The controller and door strike device implement encryption protocols over this shared medium, eliminating the need for separate communication infrastructure while maintaining security
Solution Approach 2:
The system changes the electrical parameters of the power lines by modulating voltage to encode digital communication signals. This allows the existing power infrastructure to carry encrypted data without requiring new communication cables or significant infrastructure modifications
Data Source
AI summary
A digital door strike device is an apparatus that remains secure until receiving credentialed digital messages to unlock and to return digital status messages which include door position, lock position, tamper indications, and air pressure. The apparatus includes a device installed in a door frame and a magnetic lock which secures the door. The apparatus receives power and communicates digitally over existing legacy power lines. The apparatus receives encrypted messages over the communication line. The magnetic lock is released when the apparatus receives an unlock message from a trusted remote device or door reader device.