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안상수(Sangsoo Ahn),이창한(Changhan Lee),노재하(Jaeha Noh),허유나,장지호(Jiho Chang),서동민(Dongmin Seo),이문진(Moonjin Lee) 한국해양환경·에너지학회 2022 한국해양환경공학회 학술대회논문집 Vol.2022 No.6
해수 중 존재하는 유해화학물질 검출을 목적으로 센서 시작품 제작하고 성능을 확인하였다. 센서 시작품은 검지부, 기구부, 구동부로 구성하였다. 센서의 검지부는 플렉서블 기판 위에 ITO 나노입자 필름을 인쇄하여 제작하였고, 온도와 HNS 농도를 동시에 검출할 수 있도록 2개의 검출 부분을 갖도록 설계하였다. 센서의 기구부는 검지부와 구동부를 연결하며, 검출에 영향을 줄 수 있는 화학적 반응을 막기 위해 테프론 재질을 이용하여 제작하였고, 특히 검지부의 탈착이 용이하도록 하였다. 구동부는 브릿지 회로와 아두이노 보드를 이용하여 전원 공급과 데이터 측정 및 디스플레이가 가능하도록 제작하였다. 시작품의 성능은 응답 (ΔR), 검출하한 (Limit of Detection), 응답시간 (response time), 오차 (error) 등을 평가하였고, 설계 사양이 구현되었는지 확인하였으며, 실험실에서 평가한 결과와 동일한 성능이 확보되었는지 확인하였다. To detect harmful chemical substances in seawater, we fabricated a prototype sensor and evaluated its performance. The prototype sensor consisted of a detector, a housing, and a driving circuit. We made the detector by printing an ITO nanoparticle film on a flexible substrate, and it has two detection parts for temperature and HNS concentration detection simultaneously. The housing connects the detector and the driving circuit and is made of Teflon material to prevent chemical reactions that may affect sensor performance. The driving circuit supplies electric power, measure, and display data using a bridge circuit and an Arduino board. We evaluated the sensor performances such as response (ΔR), the limit of detection (LOD), response time, and the errors to confirm the specification.
실사용조건을 모사한 전차선 굽힘피로 특성평가 시스템개발
강민성(Minsung Kang),안상수(Sangsoo Ahn),구재민(Jae Mean Koo),석창성(Chang Sung Seok),이기원(Kiwon Lee),조용현(Yong Hyeon Cho) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
A Trolley line is a very important equipment among electric railway equipments since it contacts directly with pantograph and supplies electricity on the electromotive. Such it was thought that a trolley line need not to consider fatigue since the replace cycle by wear is shorter than the replace cycle by fatigue breakage. But the bending fatigue breakage accidents occurred several times at the Shinkansen trolley line in East Japan Railway Company. Therefore in case of a new developed trolley line the evaluation for bending fatigue life became more important But since there are not an authorized fatigue test method and a testing device for the trolley line the quantitative evaluation is difficult. In this study we analyzed the load and environment condition of trolley line used in the actual spot and the developed testing device that can evaluate bending fatigue properties of the trolley line as simulating the real condition. The bending fatigue test of the trolley line was achieved using the developed testing device and estimated the fatigue life of trolley line and also established the fatigue test process.