Radio Key Signal Release for Lock Selection
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Solution Overview
Problem
In a radio locking system using active radio keys, the current methods fail to ensure that only authorized radio locks are released, leading to unauthorized access when multiple locks are within the transmission range, and existing solutions either shorten battery life or require complex signal processing.
Innovation Solution
The method involves the active radio key sending a signal that each lock determines the field strength of, calculating a waiting time based on this strength, and then selectively sending a release signal to the closest lock, ensuring only one lock is opened, while also considering past release frequencies and structural distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the radio key sends a signal that is received by all radio locks in transmission range, then the radio key can be actuated and the radio lock can be released as soon as you approach the radio lock, but all locks are released including unauthorized ones
Solution Approach 1:
The patent applies local quality by making each radio lock respond differently based on its local characteristics (field strength measurement, waiting time calculation, release frequency history). The radio lock closest to the key (with highest field strength) gets released, while others remain locked, providing both convenience and security.
Solution Approach 2:
The patent uses preliminary action by having radio locks continuously send identification signals and have the radio key continuously measure field strength before actuation. When the key is activated, the system immediately identifies which lock to release based on pre-measured field strength data, enabling fast response without compromising security.
2Measurement precision
If radio locks send signals continuously or at specified times to enable the radio key to determine reception level, then the system can identify the closest lock, but battery life is shortened
Solution Approach 1:
The patent implements periodic action by having radio locks send identification signals at specified time intervals rather than continuously. This periodic transmission is sufficient for the radio key to measure and compare field strength levels while significantly reducing battery consumption compared to continuous transmission.
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 approach ensures secure and efficient operation by ensuring only the intended radio lock is released, minimizing battery drain and maintaining system reliability, while accounting for frequent usage patterns and structural constraints.
Implementation Method 1
the radio key can have an active transmitter which, after pressing a button, sends a signal which is received and evaluated by all radio locks within a transmission range
Implementation Method 2
Each of the wireless locks determines a measure of the field strength of the signal it receives, i.e. a norm for the received field strength ∥ E ∥. The larger this measure ∥ E ∥, the smaller the distance x between the radio key and the corresponding radio lock
Data Source
Figure 1~2
AI summary
The method involves transmitting a signal from an active radio key to one of two radio locks, where each radio lock determines a value for a field strength of the signal received by the radio lock for a waiting period (t). Identifying information is transmitted to the radio key when the waiting period elapses. The radio lock is selected by the radio key based on the waiting period, and a releasing signal is transmitted to the identified radio lock from the radio key. A standard waiting period is again generated by a random number generator with the determination of the period (t).