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한영오,Han, Young-Oh 한국전자통신학회 2010 한국전자통신학회 논문지 Vol.5 No.3
본 연구에서는 방범방재 기능을 갖는 에너지 절약형 조명기기를 개발하였다. 개발된 조명기기와 관리실을 지그비 무선통신으로 연결하여 조명기기에서 획득된 정보를 전송할 수 있어 편리하게 모니터링이 가능하다. 본 조명기기를 교실 또는 사무실 내부에 여러 개의 일반 형광등과 병행하여 1개만 설치하면 학교 또는 일반 건물을 위한 저비용 방범방재 및 에너지절약형 무선 네트워크 시스템 구축이 가능하다. In this paper, the energy saving illuminator with a function of crime and fire prevention is developed. This illuminator is communicated with a superintendent's office by wireless communication and the informations being archived by the illuminator are transmitted to a superintendent's office. If this illuminator is established with only one in a lecture room or a office room, a wireless network with saving a energy and preventing crimes and fires can be constructed.
한영오 남서울대학교 공학연구센터 2002 공학연구 Vol.3 No.-
The computerized cardiac analysis system, which acquires and analyzes the electrical activation signal propagating along the surface of the heart, is indispensible equipment for the open heart surgery and electrical cardiac functional study. In this paper, we designed the isolation amplifier for removing lekage current and high frequency digital switching noise between source line of main amplifier and ground. The design requirement and the electrical circuit analysis are performed to construct the multi-channel cardiac activation pre-amplifier necessary for a signal conditioning circuit.
심장전기도 시스템에서 개선된 사용자 인터페이스 S/W 설계
한영오 남서울대학교 2005 남서울대학교 논문집 Vol.11 No.2
In this study, we have developed user interface S/W for 128 channel computerized data analysis system using microcomputer for basic research of electrophysiology and electrical propagation. The bipolar electrogram information is acquired from 128 cardiac sites simultaneously at a sampling rate of 1 ksampls/sec with continuous and total data storage of up to 30 seconds, When the reference electrogram is selected and reference point is picked up, delay time from the reference point is displayed on two dimensional diagram of the heart. System design permits easy expansion to almost 256 simul- taneous sites. This S/W is expected to enable a doctor to study pathophysiology of cardiac arrhythmia and to improve the result of diagnosis and surgical treatment for cardiac arrhythmia
128 채널 심장 전기도 시스템의 전원선잡음 제거를 위한 노치 필터의 구현
한영오 남서울대학교 공학연구센터 2001 공학연구 Vol.2 No.-
It is well known that multipoint and computerized intraoperative mapping systems improve the results of surgery for Wolff-Parkinson-White syndrome and show tremendous potential for opening an entirely new era of surgical intervention for the more common and lethal types of supraventricular tachyarrhythmias such as atrial flutter and atrial fibrillation. In this study, we have developed the notch filter for removing source line noise in 128 channel cardiac ECG system for basic research of electrophysiology and electrical propagation. A system design permits easy expansion to almost 256 simultaneous sites. this system is expected to enable us to study pathophysiology of cardiac arrhythmia and to improve the result of diagnosis and surgical treatment.
128채널 심장전기도 시스템을 위한 3차원 매핑 소프트웨어 개발
한영오,유선국 대한의료정보학회 2002 Healthcare Informatics Research Vol.8 No.4
The ability to map and ablate the sometimes fleeting automatic atrial tachycardia is greatly enhanced by computerized mapping systems. In this study, we have developed 128 channel computerized data analysis system using microcomputer for basic research of electrophysiology and electrical propagation. The bipolar electrogram information is acquired from 128 cardiac sites simultaneously at a sampling rate of 1 ksampls/sec with continuous and total data storage of up to 30 seconds. When the reference electrogram is selected and reference point is picked up, delay time from the reference point is displayed on three dimensional diagram of the heart. System design permits easy expansion to almost 256 simul- taneous sites. This system is expected to enable us to study pathophysiology of cardiac arrhythmia and to improve the result of diagnosis and surgical treatment for cardiac arrhythmia.
GRNN을 이용한 대역 분할된 심장조영상의 움직임 예측기법
한영오 대한의료정보학회 2002 Healthcare Informatics Research Vol.8 No.4
Medical images with high resolution are coded to be archived and communicated in PACS. In this paper, a new nonlinear predictor using neural network(GRNN) is proposed for the subband coding of Cardio-Angiography. The performance of a proposed nonlinear predictor is compared with BMA(Block Match Algorithm), the most conventional motion estimation technique. As a result, the nonlinear predictor using GRNN can predict well more 2-3dB than BMA. Specially, because of having a clustering process and smoothing noise signals, this predictor well preserves edges in frames after predicting the subband signal. This result is important with respest of human visual system.
ZigBee 통신 및 다중센서를 이용한 방범.방재 시스템 개발
한영오,Han, Young-Oh 한국컴퓨터산업학회 2009 컴퓨터産業敎育學會論文誌 Vol.10 No.5
본 논문에서는 IEEE 802.15.4 무선통신 표준으로 개발된 ZigBee 모듈과 다중센서를 이용하여 방범 방재 상황을 무선으로 Display하는 시스템을 구현하였다. 방범 시스템은 초음파, 적외선 센서를 이용하여 감지 시스템을 구현하였고, 메인칩으로는 PIC16F73을 사용하였다. 전등을 연결, 자동 전등 ON/OFF를 구현하였다. 방재 시스템은 온도센서를 이용하여 구현하였다. ATmega64를 사용한 무선통신모듈인 ZigBee 시스템과 다중센서를 연동하여 방범, 방재 시스템을 구현하여 감지된 데이터를 EndDevice에서 Coordinator로 전송하여 Coordinator에서 전송 받은 데이터를 PC에 Display 할 수 있도록 구현하였다. In this paper, the raid and fire preventable system using Zibee module with IEEE 802.15.4 wireless communication standard and multi-sensor was developed displaying raid and firing condition with wireless network. The raid preventable system is designed using a ultrasonhe waves sensor and infrared sensor. The fire preventable system is designed using a thermistor. The datas for raid and firing condition are communicated from enddevice to coordinator with wireless network and are displayed on PC monitor.