스마트폰 기반의 효율적인 디지털 도어락 광 무선 제어

Abstract

As smartphones have become popular, various smartphone based wireless technologies have recently emerged, such as home smart devices and appliances using Bluetooth and Wi-Fi. Among these, digital doorlocks have become widespread, due to their convenience and easiness. However, current digital doorlocks are predominantly based on keypad (password entry) oriented operation that would be vulnerable to any possible security leakage. In this thesis, a visible light communication (VLC) based digital door lock compatible with smartphones is proposed. The proposed digital doorlock system is comprised of the LED data transmission from a smartphone and the PD installed on a digital doorlock. For the VLC data transmission, various VLC digital data modulation schemes have been studied. The proposed digital doorlock was implemented in hardware to analyze the performance and accuracy. From the experiments, it was found that the doorlock operates efficiently and accurately over a practical distance between smartphone and digital doorlock in an indoor environment.