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변미경,김현준,장준근,한상휘,허웅,Byeon, M.K.,Kim, H.J.,Jang, J.K.,Han, S.W.,Huh, W. 한국전기전자학회 2007 전기전자학회논문지 Vol.11 No.1
본 연구에서 심리적으로 안정된 상태에서 맥율을 측정할 수 있는 장치를 개발하였다. 개발된 시스템은 뇌파, 호흡파, 맥동파를 검출하는 하드웨어장치와 이들 신호를 획득하고 처리하는 소프트웨어로 구성하였다. 뇌파는 전두부에서 쌍극형으로 유도하였고, 호흡은 서미스터 브리지를 이용하여 구성된 변환기를 사용하여 비강 전부에서 유도하였으며 맥동파는 귀볼에서 유도한 용적맥파를 사용하였다. 피검자의 심리적 안정된 상태의 판정은 뇌파의 스펙트럼을 이용하였다. 맥율의 결정은 원전에 따라 1호흡 당 맥동수를 사용하였다. 개발된 장치를 사용하여 맥율검출 실험을 한 결과, 뇌파의 주파수 대역별 구분, 안정된 호흡신호의 검출과 이득 조절이 되는 용적맥파의 검출이 실시간으로 가능하였다. 그리고 검출된 신호로부터 맥율을 검출할 수 있었다. In this paper, we developed a Mac-Yule measurement system which consider psychological stable state of patience. The developed system consist with a hardware device that can derive a EEG, respiration and pulse wave, and a software which acquire a biological signal and signal processing The EEGs are derived with bipolar method from frontal head. The respiration signals obtain from nasal front with a transducer which consist with thermistor bridge. The pulse waves are detected from earlobe with photoplethysmograph method. A power spectrum of EEG are used as the decision parameters of psychological stable state of patience. The decision of Mac-Yule are defined as origin text method that of numbers of pulse to 1 respiration period. As the results of experiment with developed system, we could have a spectrum band discretion of EEG signal, stable respiration signal detection and automatic gain controlled pulse signal with realtime. And then, we could detect Mac-Yules from processed signals.
박동균(D.K.PARK),이호재(H.J.LEE),류시혁(S.H.RYU),한상휘(S.H.HAN),허웅(W.HUH) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, we present the range finding method for the moving vehicle using FMCW method. The measurable maximum distance is about six meters and we provide demodulation signal to the user for a distance information. Tested object is a single one and we used broadband ultrasonic transducer as a sonar sensors. By analyzing power spectrum, We observe the relationship between peak frequency and distance from object.<br/>
김현준,주상규,임수현,변미경,한상휘,허웅 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-
As medical technology develops and the interest of health increases, diagnostic study for diseases and development of medical treatments are actively progressing. However, development of oriental diagnosis equipments leave much too be desired. In this paper, we developed a system to objectify mac-I in on this score. The RSP signals are detected by using a thermistor which detects temperature variation of nasal air flows, the PPG signals are detected by using reflected volume of light through transmitting light at the blood vessel, and EEG signals are detected by using disposable Ag-AgC1 electrode. Besides we classified frequency components of EEG signal through acquired signals, we measured the number of pulse per one respiration. In this study, as the result of experimets among subjects using the developed system, we could acquire proper waveforms of biomedical signals to detect the number of pulse per one respiration.