• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.560-563
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• 2015

Door lock system is used for the conventional method by using a key or a card, a pad Replication, loss, and the risk of damage, and has a problem that exposure to others. In this paper, Bluetooth communication and OTP built into smartphones in order to complement the existing door lock system problems OTP(One-Time-Password), Hide-Key utilizing the authentication method and the Arduino smartphone-based design of wireless OTP door lock system by enabling users it allows for more convenient and safe life free from the risk of theft and robbery.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.07a
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• pp.177-178
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• 2015

본 연구에서는 사회적 문제인 맞벌이 부부가 증가함에 따라 아동범죄 및 생계형 범죄로부터 사용자의 안전의 보장과 기존의 디지털 도어락의 문제점을 보완하고자 IoT기술과 STT를 이용하여 사용자에게 안정성을 제공하여 주며, 동시에 편리성을 제공하고자 본 시스템으로 하여금 이와 같은 문제를 해결하여 줄 수 있게 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.86-88
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• 2017

The digital door lock is an electronic door lock that uses a password system and has the function of automatically locking the door when the door is closed, thus eliminating the worry about the door lock. As the technology has gradually developed, various authentication technologies such as semiconductor key system, RFID, and fingerprint recognition have been introduced. However, there is a danger of copying the door lock key, and there are password stealing and infringement. In this paper, we develop a remote control system that can unlock or open a smartphone to supplement the user's risk. The system you are going to develop can use WiFi to check if the door is locked or open on your smartphone, and you can lock or unlock the door remotely.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.1093-1096
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• 2021

우리는 1 인 가구가 늘어나고 있고 주거 침입 사고도 많이 발생하고 있는 현재 사회에 맞게 도어락에 보안을 강화하고, 집안에 CCTV 를 설치하여 감시하는 서비스를 제공하여 거주자의 불안감을 덜어내도록 한다. 사용한 H/W 는 아두이노와 지문인식센서로 도어락의 지문인증에, 라즈베리파이와 웹 캠은 도어락의 얼굴인증, CCTV 에 사용하여 구축했다. 또한 도어락 인증에 성공하면 집 모형의 문을 열어주기 위해 서보 모터를 사용했다. 사용한 S/W 는 데이터 저장, 얼굴 인증은 AWS 클라우드 서비스를 활용했고, 스마트폰 알람은 FCM 을 사용하였다. OpenCV 를 사용해 움직임 감지를 하고, Flask, Ngrok 를 활용해 실시간 스트리밍이 가능하도록 했다. 어플에서는 관리자가 데이터를 관리(조회, 추가, 삭제)를 할 수 있다.

• KIPS Transactions on Software and Data Engineering
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• v.3 no.6
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• pp.237-242
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• 2014

Current digital door lock systems are mainly designed for users' convenience, so they have weakness in security. Thus, this paper suggests a video digital doorlock system grouped with a relay device, a server, and a digital doorlock with a camera, sensors, and communication modules, which is detecting or recognizing objects approaching to the front of the door lock system and sending images and door-opening information to users' smart devices. Experiments showed that the suggested system has 96~98% recognition rate of approaching objects and requires 17.1~23.9 seconds for transmission on average, depending on network systems. Therefore, the system is thought to have enough capability for real time security response by monitoring the front area of the doorlock system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.657-659
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• 2018

In real life, We are using IoT technology directly. IoT technology has been applied in many fields and has developed continuously. Internet of Things is a technology or environment that attaches sensors to objects and sends and receives data through internet in real time. In this paper, if a password is wrong more than three times, the existing password is initialized and randomly changed. Changed password data seeks to realize that push alarms are sent via the app to the user or administrator. We have studied an Indono-based IoT system that can send real-time data to smart phones through WiFi. smart door locks are intended to implement them using Aduino, fingerprint sensor, camera sensor, Wi-Fi shield, Android Studio, and door lock components.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.1
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• pp.45-52
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• 2018

In this paper, we propose smart digital door lock system using heterogeneous communication. This system has efficient function using RF communication and Internet communication, and realizes access and real image of the passengers by combining camera control technology to secure original competitiveness with existing products. It uses the Internet of things and receive images to and from your smart-phone. And senses human behavior. In the simulated results, the image transmission rate of 90 % or more and the time required to transmit 10,000 images have an average transmission speed of 3 seconds. It is expected to secure competitiveness to increase the security of door lock in the future by enabling minimum security and fire monitoring service in real time.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.01a
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• pp.125-126
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• 2020

본 프로젝트는 고객과 택배기사가 배송과정에서 겪는 불편함을 해소하기 위해 App과 IoT센서를 연동하여 배송과정의 편의성을 제공하는 무인 택배함이다. 기존 택배함의 비밀번호를 사용하는 방식이 아닌 택배함에 부착되어있는 NFC 태그 스캔을 통하여 편리하게 물품을 배송 및 보관할 수 있도록 하였다. App은 택배기사와 고객으로 나뉘어 있으며 택배기사 App의 주요 기능은 운송장 번호를 스캔하여 물품을 보관할 여러 택배함 중 하나를 선택하여 해당 택배함의 도어락을 제어하는 기능이 있으며, 고객 App의 주요 기능은 NFC 스캔을 통해 물품이 보관된 택배함 또는 보관할 택배함을 선택하여 도어락을 제어하는 기능이 있다. 그 외에 택배기사 App은 배송 목록 조회, 내 정보 확인 등의 서비스를 제공하고 있으며, 고객 App은 택배 예약, 예약 조회 등의 서비스를 제공하고 있다. 택배함은 와이파이 모듈을 통해 서버와 통신할 수 있도록 하였으며, 충격센서와 Mp3 모듈을 사용하여 택배함에 충격을 가하면 경보음이 울리도록 설계하였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.6
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• pp.99-105
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• 2018

This paper proposes multiple access method for smart doorlock system using VLC(Visible Light Communication) with color grid modulation method. The proposed method is to connect multiple visible light signals using color grid modulation method in order to recognize and authenticate multiple users accessing doorlock. In order to enable visible light multiple access with existing infrastructure, the symbol energy interval of signal should be maximized. Thus, performance of system in VLC channel is measured by modulating symbols based on the proposed method. We confirm the actual channel test results of the modulated signal to implement doorlock system that recognizes the number of multiple access users.

• The Journal of the Korea institute of electronic communication sciences
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• v.17 no.6
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• pp.1199-1206
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• 2022

In this paper, unlike door locks that are controlled only by the existing keypad because electronic devices can be easily operated through apps on smartphones in modern society, an app was created using app inventory so that door locks can be controlled using smartphones. Through the Bluetooth module experiment, the communication distance with the smartphone was controlled up to 10m when there were no obstacles, and through the voice recognition experiment, the recognition rate was 85% and 90% at 500~1000Hz and 1000~1500Hz, respectively, and 70% and 80% at 80dB noise. Through the results of the experimental evaluation, it was confirmed that convenience and security could be improved.