• The Journal of the Institute of Internet, Broadcasting and Communication
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• 제19권4호
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• pp.55-63
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• 2019

Proximity sensors and rearview cameras for automobile safety are common, but many accidents are still occurring. Using the All Around View and object recognition algorithm to show the front, back, left, right and bottom of the vehicle, the sensor detects the presence of a living body when the vehicle starts or parks, and displays the outside of the vehicle on the screen. In addition, the object recognition algorithm is used to visualize the object by expressing the position of the object. In this way, we propose a strong safety system that can prevent human accidents caused by the vehicle by sensing, screen, and expression.

• Proceedings of the Korea Information Processing Society Conference
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• 한국정보처리학회 2017년도 추계학술발표대회
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• pp.1145-1147
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• 2017

사회적 소외계층이 증가함에 따라 무연고 사망자가 늘어나는 사례가 늘고 있다. 따라서 본 논문은 자체 제작한 웨어러블 디바이스를 활용하여 무연고 소외계층의 건강을 관찰 및 응급상황을 대처하고 고독사를 방지하는 서비스를 제안한다. 제안한 웨어러블 디바이스는 사용자가 착용 시 심장 박동, 온도, 습도의 생명 정보를 측정 및 저장하고, 저장된 데이터와 움직임을 감지할 PIR 센서의 움직임 데이터 값을 비교하여 응급 상황을 보여준다. 이를 위해서 사용자 용 웨어러블 디바이스, DB 관리서버 및 웹 페이지를 구축하였다.

• Journal of Industrial Technology
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• 제32권A호
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• pp.109-114
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• 2012

In this paper, We studied LED(Light Emitted Diode) sensor lights system using PIR(Pyroelectric Infrared Ray) sensor, CdS and MCU(Micro Controller Unit). And applied the valley fill circuit to improve the power factor. We designed the amplifier for each sensor and the LED driver for constant current which is the buck converter. Also, we proposed the algorithm of LED control by each sensors using MCU. Experimental results showed that power factor is 92% with valley fill circuit.

• The Journal of the Korea institute of electronic communication sciences
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• 제12권6호
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• pp.1087-1092
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• 2017

This paper describes a work that makes convenient use of room indicator of a professors' office. The functions are divided into two main functions, the main function being the display panel and the additional function LCD display. Both of these functions are designed to be controlled by smart phone application using bluetooth wireless communication.

• Proceedings of the Korea Information Processing Society Conference
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• 한국정보처리학회 2018년도 추계학술발표대회
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• pp.489-492
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• 2018

사물인터넷을 기반으로 움직임을 감지하고 사진을 촬영하는 야생동물 방범장치를 구현하였다. 움직임을 감지할 수 있도록 진동과 PIR(Passive Infrared Sensor) 센서를 부착하였고, 촬영한 사진은 웹과 앱에서 확인할 수 있도록 하였다. 본 논문에서는 야생동물 방범장치의 설계 부분인 UML(Unified Modeling Language) 을 활용한 여러 다이어그램과 IoT(Internet of Things) 기반 야생동물 방범장치를 구현한 결과물을 볼 수 있다.

• The Journal of the Korea institute of electronic communication sciences
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• 제7권5호
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• pp.1165-1171
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• 2012

Latest, it is dealt with seriously problems that an intruder kidnapping students in elementary school. Especially young students is more vulnerable in these risks. Elementary School has many limitations in controlling the intrusion of trespassers. A problem occurs that requires a lot of manpower through the deployment and management of security systems such as CCTV and control systems. In this paper, we is designed and implemented the outsider access management system using a sensor network and PZT camera called the USN's core technology to monitoring the access control for controlling the mobility of the trespassers.

• Journal of Institute of Control, Robotics and Systems
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• 제11권4호
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• pp.314-321
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• 2005

In this paper an intelligence embedding quadruped pet robot is described. It has 15 degrees of freedom and consists of various sensors such as CMOS image, voice recognition and sound localization, inclinometer, thermistor, real-time clock, tactile touch, PIR and IR to allows owners to interact with pet robot according to human's intention as well as the original features of pet animals. The architecture is flexible and adopts various embedded processors for handling sensors to provide modular structure. The pet robot is also used for additional purpose such like security, gaming visual tracking, and research platform. It is possible to generate various actions and behaviors and to download voice or music files to maintain a close relation of users. With cost-effective sensor, the pet robot is able to find its recharge station and recharge itself when its battery runs low. To facilitate programming of the robot, we support several development environments. Therefore, the developed system is a low-cost programmable entertainment robot platform.

• Proceedings of the Korea Information Processing Society Conference
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• 한국정보처리학회 2012년도 추계학술발표대회
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• pp.1311-1314
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• 2012

최근에는 LED 조명으로 인해 조명 제어의 유연성이 높아짐에 따라 가정이나 사무공간에서 해당 공간의 목표 조도를 설정하고 현재 내부조도의 상황에 따라 자동으로 조명을 디밍하는 형태로 연구가 이루어지고 있다. 그러나 이러한 제어방식이 현재 주택용 요금제도로 운영 중인 고정요금제에서는 에너지 비용을 감소시키나, 스마트그리드에서 운영될 RTP(Real Time Pricing)에서는 요금 단계에 따라 오히려 에너지 비용이 증가될 수 있다. 이에 본 논문은 실시간 요금 단계에 따라 LED 조명의 목표 조도를 가변적으로 변화시켜 조명 에너지 비용을 최소화하고 사용자의 작업에 적합한 상황별 조도를 자동으로 제어하여 작업자에게 편리함을 제공하고자 한다. 이때 요금 단계에 따른 상황별 최저 및 최고 조도기준은 KSA 3011 및 IES를 참조하며, 최소한의 조명 에너지 사용을 위해 외부 광량을 최대한 활용하여 현재의 시간에 따라 블라인드의 Open/Close를 자동으로 서비스한다. 사용자의 상황은 PIR, Electric Powermeter, Piezoelectric 센서로부터 사용자의 위치, 가전기기 사용 유무, 착석 여부 등을 파악하고, RTP 요금에 따라 하루동안의 조명에 사용된 전력요금을 시뮬레이션한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.161-163
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• 2022

In spite of the recent enforcement of policies to reduce traffic accidents, pedestrian safety accidents on the back road continue to occur. In this paper, we propose a device design to prevent traffic accidents capable of measuring distance and wireless communication to quickly notify pedestrians of the vehicle's approach in a safety blind spot. The accuracy of vehicle and pedestrian distance measurement was tested using ultrasonic and radar sensors with a wide sensing range, and the possibility of responding to accidents that could provide safety for pedestrians in emergency situations was verified through a wireless communication connectivity test between target boards.

• Journal of Digital Convergence
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• 제11권4호
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• pp.229-234
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• 2013

The purpose of this study is to develop a lighting apparatus of the illuminance and color temperature to maximize the ability of the optimal combination of light sources that can be controlled efficiently control device. Finding people comfortable feeling for indoor lighting that can be used in a variety of color temperature illumination area by combining light sensitivity can be realized. Lighting apparatus for fluorescent lamps with different color temperature of 2000K and 8000K, and by varying the quantity of each of the fluorescent lamps, the illuminance of lighting equipment and color temperature through optical simulations were evaluated. By infrared remote control receiver, divided into 5 types of relaxation, conversation, meeting, hospitality, arts and the lighting environment you want to transfer the PC0 ~ PC4 through the parallel port on the mode selected by the user at the receiving end the DC voltage output. EEFL inverter input DC voltage and the DC input voltage, depending on the level of EEFL dimming value (illuminance and color temperature) lighting environment you want to create change while using a PIR sensor EEFL automatically turn off if people do not have was developed so that the power consumption so you can save.