Wireless Access Control Using Magnetic Field Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Radio frequency passive keyless entry systems for residential locks face challenges in authentication speed, proximity measurement, location determination, battery life, and timely revocation, which affect user convenience and security.
Innovation Solution
A wireless access control system that uses a remote access device with magnetic field generation and sensing capabilities, combined with a lock assembly equipped with wireless communications and a magnetic sensor, to authenticate users based on magnetic field characteristics and enable secure unlocking, while also extending battery life and facilitating timely revocation through advanced communication protocols and proximity detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If RF PKE system uses traditional authentication methods, then authentication speed is improved, but proximity measurement accuracy deteriorates
Solution Approach 1:
The patent segments the authentication process into two distinct phases: RF communication for authentication and magnetic field sensing for proximity measurement. This segmentation allows each subsystem to optimize its function independently, achieving fast authentication through RF while maintaining accurate proximity detection through magnetic field characteristics.
Solution Approach 2:
The patent introduces magnetic field characteristics as an intermediary mechanism to convey proximity information without relying on RF signal strength alone. The magnetic sensor detects subtle changes in magnetic field caused by the remote device's proximity, providing accurate distance measurement that complements the fast RF authentication process.
2Ease of operation
If RF PKE system extends detection range, then user convenience is improved, but security against unauthorized access deteriorates
Solution Approach 1:
The patent changes the detection parameter from RF signal strength alone to a combination of magnetic field characteristics and location determination. By monitoring multiple parameters including magnetic field strength, touch sensor activation, and device location, the system can distinguish between authorized users within range and unauthorized attempts, extending convenience while maintaining security.
Solution Approach 2:
The patent implements preliminary location determination and magnetic field characterization before granting access. The system预先 establishes the expected magnetic field signature and location of authorized devices, then verifies these conditions are met before unlocking, preventing unauthorized access even when detection range is extended.
3Reliability
If RF PKE system uses continuous monitoring, then authentication reliability is improved, but battery consumption increases
Solution Approach 1:
The patent employs periodic magnetic field sampling and event-triggered monitoring instead of continuous monitoring. The magnetic sensor takes periodic measurements and activates authentication protocols based on specific events such as touch sensor activation or significant magnetic field changes, maintaining high reliability while significantly reducing battery consumption compared to continuous monitoring.
4Reliability
If RF PKE system implements multiple authentication factors, then security is improved, but device complexity increases
Solution Approach 1:
The patent implements multiple authentication factors using a unified magnetic field sensing approach. The same magnetic sensor and processing circuitry handle multiple authentication modes including proximity detection, touch sensing, and location determination, achieving enhanced security without proportionally increasing device complexity through component multiplication.
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
The system enhances authentication speed, improves proximity measurement accuracy, extends battery life, and ensures timely revocation, providing increased convenience and security for users by leveraging magnetic field characteristics and advanced communication protocols.
Implementation Method 1
cooperate with the magnetic field generator to generate a magnetic field based upon the at least one magnetic field characteristic
Implementation Method 2
The lock controller may be configured to cooperate with the magnetic sensor to sense the magnetic field
Data Source
AI summary
A wireless access control system may include a remote access wireless device that includes a magnetic field generator and a remote controller coupled to remote access wireless device wireless communications circuitry and the magnetic field generator. The system may also include a lock assembly for a door and that includes a magnetic sensor and a lock controller coupled to a lock, lock wireless communications circuitry, and the magnetic sensor. The remote controller may communicate a magnetic field characteristic with the lock wireless communications circuitry, and cooperate with the magnetic field generator to generate a magnetic field based upon the magnetic field characteristic. The lock controller may cooperate with the magnetic sensor to sense the magnetic field, compare the sensed magnetic field to the magnetic field characteristic, and enable lock unlocking when the sensed magnetic field has a sensed magnetic field characteristic that matches the magnetic field characteristic.