Electronic Locking System for Direct Passive Communication
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Solution Overview
Problem
Existing electronic locking systems face challenges in direct communication and power supply failures between passive transponders and locking mechanisms, necessitating intermediate storage of locking authorizations, which compromises security and efficiency.
Innovation Solution
The system employs a master element with two antennas to simultaneously excite the electronic locking mechanism and passive identification means, utilizing modulation conversion to enable direct communication and power supply between passive elements, eliminating the need for intermediate storage of locking authorizations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a passive transponder is used without its own power source, then the system achieves wireless operation and reduced complexity, but the transponder cannot initiate communication or control the locking mechanism independently
Solution Approach 1:
The master element serves as an intermediary device that bridges the passive transponder and the locking mechanism. It receives power and communication signals from the transponder, processes the locking authorization, and controls the locking mechanism, thereby enabling the passive transponder to control the lock without having its own power source or control capabilities.
2Ease of operation
If the master element stores locking authorizations in its memory, then it can control the locking mechanism, but security is compromised due to the additional storage of sensitive data
Solution Approach 1:
The locking authorization is extracted from the master element's memory and transferred to the passive transponder's storage. This eliminates the need for the master element to store sensitive locking authorizations, thereby maintaining security while still enabling the master element to control the locking mechanism through the transponder.
3Device complexity
If the same transmission path is used for both power supply and data communication, then the system achieves integrated operation, but the data cannot be received and transmitted using the same modulation type
Solution Approach 1:
The electrical circuit changes the modulation parameter of the signal. It receives load-modulated signals from the passive transponder and locking mechanism, converts them to amplitude shift keying (ASK) modulation, and transmits the converted signals back to the respective components, thereby enabling compatible data communication over the same power transmission path.
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
This design enhances security and speed by allowing direct communication and power supply between passive elements, ensuring seamless operation even in power failures, and supports multiple access authorizations through additional passive transponders, reducing administrative effort and operational complexity.
Implementation Method 1
the electrical circuit (4) enables direct communication between the additional passive transponder (8) and the locking mechanism (2). The electrical circuit (4) converts an input signal with one modulation scheme into an output signal with a different modulation scheme
Implementation Method 2
the master element (1) has two antennas (25, 26) for simultaneously exciting the electronic locking mechanism (2) and the passive identification means (9)
Data Source
Figure 1a~1b
Figure 2
AI summary
An electronic locking system with a passive transponder (5) for controlling an electronic locking mechanism (2) has a master element (1) with a power source (3) for simultaneously supplying electrical energy to the electronic locking mechanism (2) and the passive transponder (5). This allows data to be exchanged directly between the passive transponder (5) and the also passive locking mechanism (2) in the event of a power source (24) failure of the locking mechanism (2). Furthermore, a connection can be established via an interface (10) of the master element (1) between an additional passive transponder (8), preferably arranged in a passive identification device (9), and the passive locking mechanism (2). The master element (1) can also be configured as a programming unit for the electronic locking system.