Wireless Lockset AoA Sensor Antenna Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic locksets face complexity and increased cost in determining the position of an authentication device using wireless signal strengths, leading to potential security vulnerabilities if they cannot differentiate between the device being inside or outside the door.
Innovation Solution
A lockset system that incorporates an angle of arrival sensor to determine the distance and direction of an authentication device based on wireless phase and timing information, reducing the need for multiple antennas and eliminating the requirement for expensive cable wiring between interior and exterior antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple antennas are used to determine the position of the authentication device, then the position detection capability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent combines multiple antenna elements into a single integrated antenna array structure within the lockset housing. Instead of using separate antennas on both interior and exterior sides, the invention merges the antenna system into one unified structure that performs multiple detection functions, thereby reducing overall system complexity while maintaining position detection accuracy.
Solution Approach 2:
The antenna array is designed to serve multiple functions: determining whether the authentication device is inside or outside the door, calculating distance through signal strength analysis, and providing angular position information. This multi-functional design eliminates the need for separate detection systems, reducing device complexity while improving measurement precision.
2Measurement precision
If antennas are installed on both interior and exterior sides of the door, then the position differentiation capability is improved, but the manufacturing complexity and wiring requirements increase
Solution Approach 1:
The invention extracts the essential detection function from the complex dual-side antenna system and implements it using a single antenna array on one side of the door. By taking out only the necessary detection capability and removing the unnecessary exterior antenna and its associated wiring, the system achieves position differentiation without the manufacturing complexity of cable wiring between interior and exterior components.
Solution Approach 2:
The patent uses wireless signal processing algorithms as an intermediary to achieve position differentiation without physical antenna connections on both sides. The signal processing mediator analyzes the characteristics of wireless signals received by the single antenna array to determine whether the authentication device is inside or outside the door, eliminating the need for complex cable wiring.
3Loss of information
If RSSI-based position detection is used, then the position information can be obtained, but the system complexity and cost increase
Solution Approach 1:
The invention changes the detection parameter from complex multi-antenna RSSI measurements to simplified signal strength analysis using a single antenna array. By changing the detection approach to rely on basic signal strength variations and timing information rather than complex phase comparisons across multiple antennas, the system obtains position information with reduced complexity.
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 solution simplifies the design, reduces costs, and enhances security by accurately determining the location of the authentication device, preventing unauthorized access by eliminating the need for multiple antennas and complex wiring.
Implementation Method 1
The controller includes an angle of arrival sensor configured to determine a distance and a direction to the authentication device by analyzing a wireless phase and timing of the incoming wireless signal transmitted by the authentication device
Data Source
AI summary
A lockset with a latch assembly having a bolt movable between an extended position and a retracted position. The lockset includes a motor configured to move the bolt between the extended position and the retracted position. A controller is provided that is configured to electronically control the motor to control movement of the bolt between the extended position and the retracted position responsive to receiving a valid authentication from an authentication device. The lockset includes a receiver connected to an antenna to detect an incoming wireless signal transmitted from an authentication device. The controller includes an angle of arrival sensor configured to determine a distance and a direction to the authentication device by analyzing a wireless phase and timing of the incoming wireless signal transmitted by the authentication device. The controller is configured to control movement of the bolt between the extended and retracted positions based, at least in part, on the distance and the direction to the authentication device.