Portable Device Signal Strength Analysis for Access Control
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Solution Overview
Problem
Existing access control systems using radio frequency devices often unintentionally trigger when a user is not intending to access a controlled object, leading to unwanted actions such as opening a car door or office door, and fail to provide timely access.
Innovation Solution
A method where a portable device and access control device wirelessly communicate, with the portable device determining signal strength over time and comparing it to a reference profile to differentiate between intended and unintended approaches, allowing for controlled access by matching the user's movement pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the access control device triggers based on simple proximity detection using signal strength, then the user experience is improved by providing timely access, but unintentional triggering occurs when the user is not intending to access the controlled object
Solution Approach 1:
The system transitions from static proximity detection to dynamic movement pattern analysis. By continuously monitoring signal strength over time and comparing it against stored movement profiles, the system adapts to the user's intended action based on their characteristic approach pattern, thereby distinguishing between intentional and unintentional approaches.
Solution Approach 2:
The system performs preliminary analysis of the user's movement pattern by comparing real-time signal strength data against pre-stored movement profiles before triggering access. This preliminary action allows the system to predict the user's intention in advance, preventing unintentional triggering while maintaining timely access for legitimate users.
2Device complexity
If the access control device uses simple proximity detection, then the device complexity is reduced, but the measurement precision of user intention is insufficient
Solution Approach 1:
The system adds a temporal dimension to proximity detection by monitoring signal strength over time rather than at a single moment. This transforms the detection from a static threshold check to a dynamic temporal pattern analysis, significantly improving user intention detection precision while keeping the hardware simple.
Solution Approach 2:
The system creates a digital copy of the user's characteristic movement pattern by storing a movement profile that captures the temporal signal strength characteristics. This copied profile is then used for comparison with real-time data, enabling precise intention detection without requiring complex sensors or hardware.
3Loss of time
If the access control device triggers in advance based on movement pattern recognition, then waiting time is reduced, but false recognition may occur with similar movement patterns
Solution Approach 1:
The system uses feedback from the continuous monitoring of signal strength to dynamically adjust and refine the movement pattern recognition. By comparing real-time signal strength data against the stored profile and continuously evaluating the match quality, the system can confirm genuine matches while rejecting false positives, thereby reducing false recognition while maintaining advance triggering.
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 method reduces unintentional triggering and provides timely access by accurately identifying the user's intention, allowing the access control device to change states accordingly, such as unlocking a door before the user reaches it, thus minimizing waiting time and improving access control reliability.
Implementation Method 1
a portable device associated with a user and an access control device. The portable device and the access control device may be configured to wirelessly communicate with each other
Implementation Method 2
determining at the portable device a signal strength over time of a signal received from the access control device
Data Source
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Figure 3
Figure 4a~4b
AI summary
The present invention relates to a method (200) for controlling access in a system comprising a portable device (104) associated with a user (106) and an access control device (102), wherein the portable device (104) and the access control device (102) are configured to wirelessly communicate (110) with each other, the method (200) comprising: pairing (202) the portable device (104) and the access control device (102), upon the portable device (104) detecting proximity to the access control device, determining (204) at the portable device (104) a signal strength over time of a signal received from the access control device (102), comparing (206) the determined signal strength over time with a previously determined reference signal strength profile, and upon the determined signal strength over time being considered congruent with the reference signal strength profile, controlling (208) the access control device (102).