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운전자 자세 실시간 모니터링이 가능한 스마트 자동차 시트 연구
심광민,서정환,Shim, Kwangmin,Seo, Jung Hwan 한국자동차안전학회 2020 자동차안전학회지 Vol.12 No.1
In recent years, the increasing interest in health-care requires the industrial products to be well-designed ergonomically. In the commercial vehicle industry, several researchers have demonstrated the driver's posture has great effect on the orthopedic desease such as fatigue, back pain, scoliosis, and so on. However, the existing sensor systems developed for measuring the driver posture in real time have suffered from inaccuracy and low reliability issues. Here, we suggest our smart vehicle seat system capable of real-time driver posture monitoring by using the air bag sensor package with high sensitivity and reliability. The ergonomic numerical model which can evaluate a driver's posture has been developed on the basis of the human body segmentation method followed by simulation-based validation. Our experimental analysis of obtained pressure distribution of a vehicle seat under the different driver's postures revealed our smart vehicle system successfully achieved the driver's real-time posture data in great agreement with our numerical model.
광범위 유해 기체 혼합물 검출을 위한 MEMS 광이온화 센서 연구
심광민(Kwangmin Shim),배성국(Bae Sung Kuk),서정환(Jung Hwan Seo) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
This study shows our novel design and fabrication technique of a microfabricated photoionization detector (μPID) capable of detecting hazardous gas-phase molecules in an extremely wide range of vapor pressures. The commercial PID sensors are used in a limited role to detect volatile or semi-volatile organic compounds. Those have been widely utilized in a micro gas chromatography (μGC) due to their rapid detection responses, thereby providing a field deployable detection capability in real-time. However, the existing PID sensors integrated into a μGC are not appropriate for narcotics detection since these materials can be detected only at the high temperature while the sensors should be maintained at room temperature. Here, we have developed a microfabricated temperature controllable PID sensor which is able to detect gas species ranging from the extremely low vapor pressure to the high vapor pressure. Our preliminary test results show that our MEMS PID sensor could successfully measure the narcotics as well as the VOCs.