NFC Door Access Panel for Secure Barrier Control Without Keypads
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Solution Overview
Problem
Existing exterior access panels for barrier operators, such as garage door openers, lack convenient alternatives for users who have forgotten their personal identification code or do not have their RF transmitter nearby, necessitating additional functionality for secure and convenient remote access.
Innovation Solution
Integration of a near field communications (NFC) module with a radiofrequency (RF) module and controller in an access control apparatus, allowing authentication via NFC signals from smartphones or other NFC devices to command barrier movement systems, enabling secure and convenient remote access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional RF transmitters or personal identification codes are used for access control, then users can operate the barrier operator, but users must carry additional devices or remember codes which reduces convenience
Solution Approach 1:
The smartphone serves multiple functions: it acts as both a communication device and an access control key through NFC technology. The access control system integrates both NFC and RF modules to universally accept different authentication methods (NFC tags, smartphones with NFC, and traditional RF transmitters), making the system adaptable to various user needs while simplifying the user experience.
Solution Approach 2:
The NFC module acts as an intermediary between the smartphone and the barrier operator control system. It receives authentication data from the smartphone via near-field communication and triggers the RF module to send the command signal to the barrier operator, enabling contactless and convenient access control.
2Adaptability or versatility
If NFC technology is integrated into the access control apparatus, then remote access convenience is improved, but the device complexity increases due to adding NFC and RF modules
Solution Approach 1:
The system merges NFC and RF communication modules into a single access control apparatus, allowing both technologies to coexist and work together. This integration enables the system to handle multiple authentication methods (NFC tags, smartphones, and traditional RF transmitters) within one unified device, improving versatility while managing complexity through consolidation.
3Reliability
If NFC authentication is used instead of traditional methods, then security against eavesdropping is improved due to short range, but the system must handle multiple authentication protocols increasing complexity
Solution Approach 1:
The access control system dynamically selects which authentication protocol to use based on the type of device presenting itself. The controller detects whether the incoming signal is from an NFC tag, smartphone, or traditional RF transmitter, and automatically adjusts the authentication process accordingly, allowing the system to be both secure and adaptable without requiring manual configuration.
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
Provides secure and convenient remote access to barrier systems by utilizing NFC technology for authentication, reducing the need for physical access codes or RF transmitters, while preventing unauthorized access through encrypted communication and time/day restrictions.
Implementation Method 1
the NFC antenna sets up the near-field around itself, with length, width and depth of the field being roughly the same as the dimensions of the NFC antenna. Thus, the NFC antenna produces a stationary electric field pulsating at 13.56 MHz
Implementation Method 2
If another similarly small NFC antenna comes into this electric field, it will induce an electric potential into it, alternating at the same frequency
Data Source
AI summary
Disclosed herein is an access control apparatus for a barrier movement system that moves a barrier. The access control apparatus includes a near field communications (NFC) module, a radiofrequency (RF) module, and a controller coupled to the NFC module and RF module. The controller is configured to read an NFC signal from an authenticated external device, via the NFC module. In response to reading the NFC signal, the controller transmits a command signal, via the RF module, that commands the barrier movement system to move the barrier.