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교통안전과 운저자의 주의력 감쇠 측정 : 문제제시와 응용
이상국,부누와 드꾸,미셸 위뱅,홀랑 드브리 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1
Driving a car is a complex task that requires the driver to maintain attention for long periods of time. Either a lack of attention or a performance decrement may have severe consequences, especially if the driver has to react promptly to an unexpected event. The most recent report of traffic accident shows that more than half of the victims of the road could not be saved by the the one consideration of passive protection taking on the vehicles, of Where the interest of our research on the driver's state through different aspects : physiological, mechanical, behavioural, dynamic etc. A real-time detection system is needed that must be predictive, in order to warn the driver that his status has changed before any fault occurs. Fatigue and hypovigilance at the wheel are major causes of car accidents Hypovigilance is a physiological state that can be mesured on physiological signals such as Electro-encephalogram (EEG) or Electro-oculogram (EOG). Despite numerouse studies carried out in this field, no constant correlation has been found so far between physiological signs of hypovigilance and changes in the driving activity. Our pratical ambition in this domain is the realization of real-time detector of hypovigilance of drivers. This realization is still in a stage of seeks some best indicators, woule certainly make call to data processing engineering, to automatic, to image/signal treatement during and after the phase of validation. A global approach of the vigilance of the drivers would be primordial in the next years.
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이상국,길두송 한국비파괴검사학회 2003 학술대회 논문집 Vol.- No.1
The objectives of this study is to develope a device which could diagnose periodically the degradation of power transformer using ultrasonic signal through ultrasonic transducer attached surface of power transformer. And also it makes possible to reduce power failure time due to the power transformer fault and makes power system more reliable. Ultrasonic diagnostic device for power transformer was developed through this study. The developed device will contributed to early detection of fault and its location in the power transformer while it is operated, and also to extension of transformer life cycle, localization of this device will be reduced it's cost down compared with off shore. This device consisted of a new diagnostic algorithm is well suited for the power transformer which could found out some fault during the operation of on line monitoring system. This system could be extended to the general industrial plant utilizing the accumulated diagnostic technique.
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