Wireless Door Lock Power and Data Transfer via Inductive Coupling
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Solution Overview
Problem
Conventional door locks with electrical components require costly modifications to conventional doors for wiring, and cannot be installed on fire doors or those without pre-arranged passageways, limiting their application.
Innovation Solution
A wireless power and information transfer system using inductive coils between a lock case and a counterpart installed in the door frame, enabling secure, encrypted communication and power transmission only when the door is closed, eliminating the need for physical wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wiring methods are used to connect electrical locks to power sources, then power and information transfer can be achieved, but door modifications are required which increase costs and limit applicability to certain door types
Solution Approach 1:
The patent replaces the mechanical wiring system with a wireless electromagnetic field-based power and data transmission system. Inductive coils in the door frame and lock case enable power transfer without physical wire connections, eliminating the need for door modifications while maintaining reliable power delivery to the electrical lock components.
Solution Approach 2:
The patent introduces electromagnetic fields as an intermediary medium for power and information transfer between the door frame and lock case. The inductive coils generate electromagnetic fields that couple energy and data across the air gap, serving as a non-contact intermediary that eliminates the need for direct physical wiring through the door structure.
2Ease of manufacture
If wireless power transfer is implemented, then door modifications are eliminated, but power transfer efficiency may be reduced compared to wired connections
Solution Approach 1:
The patent employs dynamic adjustment of the inductive coupling system to optimize power transfer efficiency. The system adjusts coil positioning, winding configurations, and electromagnetic field parameters based on the operational state and distance between the door frame and lock case, maintaining high efficiency despite the wireless transmission medium.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the installation of electrical locks on conventional doors without modifications, ensuring secure operation and compliance with regulations by using wireless power and encrypted communication, preventing unauthorized access and reducing costs.
Implementation Method 1
means for wirelessly sending electrical power to the lock case and/or into connection with the lock case are arranged in connection with the counterpart of the lock
Implementation Method 2
The means for receiving and for sending electrical power are also arranged to transfer encrypted information relating to the operation of the lock
Data Source
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AI summary
Lock arrangement, which comprises a counterpart (101, 301) of the lock and a lock (102, 202) comprising a lock case (203). The lock case (203), which can be installed in a door, comprises a locking latch (204) and a latch mechanism, which comprises electrical means for opening and/or closing the locking latch. The counterpart (101, 301) of the lock can be installed in the frame of the door. Means for wirelessly sending (303) electrical power to the lock case and/or into connection with the lock case (203) are arranged in the counterpart (101, 301) of the lock, and means are arranged in connection with the lock case (203) for wirelessly receiving (205) electrical power from the means (303) for sending electrical power that are arranged in connection with the counterpart of the lock. Electrical power is arranged to be transmitted from the means of the counterpart of the lock that are for sending (303) electrical power to the means of the lock case that are for receiving (205) electrical power, when the lock case (203) and the counterpart (101, 301) of the lock are at a certain distance from each other. The means for receiving (205) and for sending (303) electrical power are also arranged to transfer encrypted information relating to the operation of the lock.