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Gu-Ho Jung(정구호),Kyung-Hun Lee(이경훈),Hyung-Guk Kim(김형국),Yang-Jin Cho(조양진),Bo-Yun Song(송보윤),Young-Dong Son(손영동),Eun-Ha Park(박은하),Ju-Young Choi(최주영),Byung O Kong(공병오),Jin Huh(허진),Ho-Sub Son(손호섭),Jung-Gu C 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
온라인 전기자동차는 도로에 매설된 급전선로로부터 유도자계를 통하여 비접촉 방식으로 전기를 집전 받아 정차 및 주행 중에 충전하는 자동차이다. 이러한 비접촉 충전을 위해서는 도로에 매설된 급전 시스템과 차량 하부에 장착된 집전 시스템이 필요하며, 급전 시스템은 다시 급전 인버터와 급전선로로, 집전 시스템은 집전 모듈(pick-up)과 집전 레귤레이터로 구성된다. 본 논문에서는 급집전 시스템 각각의 장치를 소개하며, 더불어 구축된 시스템의 성능에 대해서도 소개한다.
鄭求仁(Gu-In Jung),田載燻(Jae-Hoon Jun),李康輝(Kang-Hwi Lee),宋旼宣(Min-Sun Song) 대한전기학회 2008 전기학회논문지 Vol.57 No.6
Since conventional methods for measuring stride length(distance) are many weaknesses, optical methods have been developed to measure stride length(distance) of human pedestrians. IR(Infrared) elements and Power LED(Light Emitting Diode) with two types of lens were used to correlate detected light intensity with stride length(distance). The suggested methods in this study are simple, convenient, and cost effective. The results can be used to analyze walking patterns of normal and disabled men, and to monitor the recovering processes of the disabled patients.
정구인(Gu-in Jung),김지선(Ji-Sun Kim),허동훈(Dong-Hun Hur),유환동(Hwan-Dong Yu),임성환(Sung-Hwan Lim),최주현(Ju-Hyeon Choi),이정환(Jeong-Hwan Lee),엄광문(Gwang-Moon Eom),전재훈(Jae-Hoon Jun) 대한전기학회 2011 전기학회논문지 Vol.60 No.10
Measuring the movement of joint angle of human body is very important clinically. Human joint angle displacement can be used to evaluate the degree of disease and disability. Also, we can determine the rehabilitation process with angular information. Conventional methods for measuring angular displacement are many weakness. The purpose of this study is to overcome the limitations of existing equipments by using optical method. For this reason, optical sensor system was used to correlate detected light signal with joint angle. Experimental results of the applied joint model in this study showed that joint angular displacement can be measured by optical signals. The suggested method is simple, durable, small, lightweight, convenient, and cost effective.
온라인 전기 자동차를 위한 비접촉 유도 전력 전달 시스템
정구호(Gu-Ho Jung),이경훈(Kyung-Hun Lee),김형국(Hyung-Guk Kim),조양진(Yang-Jin Cho),송보윤(Bo-Yun Song),손영동(Young-Dong Son),박은하(Eun-Ha Park),최주영(Ju-Young Choi),공병오(Byung-O Kong),허진(Jin Huh),손호섭(Ho-Sub Son),조정구(Jung- 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
온라인 전기자동차는 도로에 매설된 급전선로로부터 유도자계를 통하여 비접촉 방식으로 전기를 집전 받아 정차 및 주행 중에 충전하는 자동차이다. 이러한 비접촉 충전을 위해서는 도로에 매설된 급전 시스템과 차량 하부에 장착된 집전 시스템으로 구성된 비접촉 유도전력 전달(IPT, Inductive Power Transfer) 시스템이 필요하며, 급전 시스템은 다시 급전 인버터와 급전선로로, 집전 시스템은 집전 모듈(pick-up)과 집전 레귤레이터로 구성된다. 본 논문에서는 이러한 비접촉 IPT 시스템 각각의 장치를 소개하며, 더불어 구축된 시스템의 성능에 대해서도 소개한다.
정구복 ( Goo Bok Jung ),김민경 ( Min Kyeong Kim ),이종식 ( Jong Sik Lee ),김원일 ( Won Il Kim ),김건엽 ( Gun Yeob Kim ),고병구 ( Byong Gu Ko ),강기경 ( Kee Kyung Kang ),권순익 ( Soon Ik Kwon ) 한국환경농학회 2011 한국환경농학회지 Vol.30 No.2
BACKGROUND: This experiment was conducted to investigate the distribution and burden characteristics of heavy metal in the rainwater sampled at Taean area, in the middle part of Korea, from April 2002 to October 2003. METHODS AND RESULTS: The relationship between concentration of heavy metal and other chemical properties in the rainwaters was also evaluated. Chemical properties in the rainwater were various differences with raining periods and years. It appeared that a weighted average pH values of rainwater was ranged from 5.0 to 5.1. Heavy metal concentrations in the rainwater were ranked as Pb>Zn>Cu>Ni>As>Cr>Cd. As compared with heavy metal concentrations of rainwater in 2002, Cu, Pb, and Zn were higher than other elements in 2003. There were positive correlation between major ionic components, such as NH4+, Ca2+, Mg2+, K+, Na+, SO42- and NO3-, and As, Cd, Zn, Cr, and Ni concentrations in rainwater. For heavy metal distribution of rainwater, the order of average enrichment factor was Cd>Pb>As>Cu>Zn>Ni>Cr, and these were relatively higher than the natural components such as Fe, Mg and Ca. The monthly enrichment factor were relatively high, from August to October at Taean. The monthly amount of heavy metal precipitation was high in the rainy season from July to August because of great influence of rainfall. CONCLUSION(s): The results of this study suggest that the heavy metals(Cd, Pb, As, Cu, and Zn) of rainwater is strongly influenced by anthropogenic sources rather than natural sources.