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강동균(Dong Gyun Kang),강주호(Ju Ho Kang),박수찬(Soo Chan Park),한혜수(Hye su Han),한영오(Young Oh Han) 한국전자통신학회 2018 한국전자통신학회 논문지 Vol.13 No.5
차량의 블랙박스는 자전거 블랙박스에 맞지 않는 센서들이 포함되어 있어서 자전거 블랙박스에는 적합하지 않다. 그래서 본 연구에서는 기울기에 따라 자전거 블랙박스의 영상을 핸드폰으로 확인할 수 있는 시스템을 구현하였다. 자이로 센서를 이용하여 각도를 측정하고, 측정된 각도를 라즈베리파이에 제안된 각도에 근거하여 영상 파일을 저장하였다. 저장된 영상 파일을 FTP 방식으로 핸드폰 어플리케이션을 통해 다운 받을 수 있는 시스템을 개발하였다. The vehicle s black box is not suitable for bicycle black box because they contain sensors that are not suitable for bicycle black box. Therefore, this study implemented a system for viewing a video with a mobile phone as the slope changes. The angle was measured by using the gyro sensor and this angle was saved based on the angle setting on the raspberry pi. It has developed a system that allows users to download saved video files through mobile phone applications via FTP.
다양한 작동 압력 및 상대습도에서 다공성유로를 적용한 고분자 전해질막 연료전지의 물 관리 연구
이동근(Dong Keun Lee),강동균(Dong Gyun Kang),김민수(Min Soo Kim) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
In this study, to understand the water management of polymer electrolyte membrane fuel cells (PEMFCs) having porous flow field, polarization curves and power curves were measured under pressurized and various relative humidity (RH) conditions. Two RH conditions, non-humidified cathode and fully-humidified cathode, were maintained and operating pressure was changed at each RH conditions. To investigate a behavior of water in porous flow fields, two serpentine flow fields having different geometries and a porous flow field were used. In atmospheric condition, the result indicates that the porous flow field controls water flooding more effectively at high current density than serpentine flow field. Furthermore, the polarization curves and power curves show that if system operating pressure is increasing, the performances of PEMFCs reach similar value regardless of RH conditions.
인클라인드 채널을 적용한 고분자 전해질막 연료전지의 성능 향상에 관한 연구
신동규(Dong Kyu Shin),강동균(Dong Gyun Kang),김민수(Min Soo Kim) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
In this study, novel flow channel which has a tapered depth from inlet to outlet is suggested to improve the performance of polymer electrolyte membrane fuel cell (PEMFC) by reducing concentration losses at high current density area. We designed three types of inclined channel which have the same inlet depth but different outlet depth. Then, the characteristics of performance of PEMFC were investigated with different types of channel shape. The performance of PEMFC was evaluated at temperature of 60 degree Celsius. As we compared polarization curves and power density curves, we could verify that PEMFCs with inclined channel showed better performance than that with conventional channel. Moreover, electrochemical impedance spectroscopy (EIS) was also used to figure out the factors that make fuel cell performance improved. Furthermore, a numerical analysis was conducted to investigate the effect of inclined channel on the performance of PEMFC from the perspective of oxygen depletion and flooding.