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송경민,임혜인,이우경 한국항공우주학회 2014 한국항공우주학회 학술발표회 논문집 Vol.2014 No.11
대기권 내에서 낙하하며 실제 위성을 모사하는 초소형위성인 캔위성은 빠른 반응성과 저렴한 비용으로 인공위성 시스템 교육과 실험 등에 있어서 많은 주목을 받고 있다. 이러한 캔위성 시스템의 특성에 착안하여, 초 경량의 위성 2 기로 구성된 캔위성 시스템인 TSSAR 를 개발하였다. TSSAR 는 군집간의 통신을 수행하며, 자세데이터, 위치데이터, 해당지역의 영상과 가스오염 정도를 수집하고 지상국으로 전송 하게 된다. TSSAR 는 실제 발사된 이후 제한적인 임무를 수행하였고, 지상국과의 통신으로 임무데이터를 전송하였다. 본 논문에서는 국소영역 정찰을 위한 캔위성인 TSSAR 의 개발과정과 운용결과를 소개하고자 한다. 캔위성의 경량화와 확장성을 위해 PCB 2 장으로 구성된 위성을 설계하였으며, MATLAB 을 통해 영상 추적 알고리즘을 설계하였다. CANSAT is a type of micro-satellite that copies actual satellites surrounding it as it falls into the atmosphere. It received attention from satellite system education and researchers due to its fast reactivity and low cost. TSSAR (Tactical Satellite for Small-Area Recon.) is a system that was developed based on the CANSAT system, which is composed of 2 ultra-light satellite, executing communication between constellation, collects attitude data, images of applicable regions, gas contamination, and sends the information to the land station. After launch, TSSAR perform limited mission and transmit mission data via downlink to ground station. This thesis introduces the operation and development results of the CANSAT that can use recon in small areas. For the lightening and expandability of the CANSAT, 2 PCB (Printed Circuit Board) were used and an image tracking algorithm was designed via MATLAB.
고해상도 FMCW 레이더 영상 합성과 CW 신호 분석 실험을통한 드론의 탐지 및 식별 연구
송경민,문민정,이우경 한국군사과학기술학회 2018 한국군사과학기술학회지 Vol.21 No.2
There are increasing demands to provide early warning against intruding drones and cope with potential threats. Commercial anti-drone systems are mostly based on simple target detection by radar reflections. In real scenario, however, it becomes essential to obtain drone radar signatures so that hostile targets are recognized in advance. We present experimental test results that micro-Doppler radar signature delivers partial information on multi-rotor platforms and exhibits limited performance in drone recognition and classification. Afterward, we attempt to generate high resolution profile of flying drone targets. To this purpose, wide bands radar signals are employed to carry out inverse synthetic aperture radar(ISAR) imaging against moving drones. Following theoretical analysis, experimental field tests are carried out to acquire real target signals. Our preliminary tests demonstrate that high resolution ISAR imaging provides effective measures to detect and classify multiple drone targets in air.
송경민 중국한국(조선)어교육연구학회 2005 한국(조선)어교육연구 Vol.3 No.-
在中國,韓國語敎育已經成爲了外語敎育中的熱門。而作爲新興起的專業,在敎學方法上還有흔多可以硏究和補充的地方。比起其他國家的學習者,中國學習者在上學習韓國語時受到母語的影響更爲深廣。兩個語言長期相互接觸,相互,尤其是漢語對韓國語産生了重大影響。部分是正面的影響,可以爲中國學習者提供便利,而部分爲負面影響,會干擾學習者正確學習韓國語。
송경민(Kyoung-Min Song),이기웅(Ki-Woong Lee),이창현(Chang-Hyun Lee),이우경(Woo-Kyung Lee),이명진(Myeong-Jin Lee) 한국전자파학회 2016 한국전자파학회논문지 Vol.27 No.3
무인항공기는 전투뿐만 아니라, 정찰, 관측 탐사 등 여러 분야에서 이용할 수 있고, 전천후 영상 수집이 가능한 SAR(Synthetic Aperture Radar) 기술과 함께 기존의 감시정찰 체계가 수행할 수 없던 임무영역까지로 그 능력이 확장될 것으로 보인다. 오늘날, 고효율 집적기술의 발전과 시스템 경량화 기술의 발전에 힘입어 무인항공기에도 경량의 SAR Sensor를 탑재하려는 연구와 수요가 증가하고 있다. 이에 따라, 본 논문에서는 SAR 시스템을 구성하는 핵심 모듈인 광대역 첩신호발생기를 DDS 디지털 소자 기반으로 개발하여 무인항공기용 신호 발생기와 송수신장비의 개발과정 및 결과를 기술하였다. UAVs(Unmanned Aerial Vehicle) can be used in variant fields fornot only combat, but also recon, observation and exploration. Moreover, UAVs capacity can be expanded to impossible missions for existing surveillance system such as SAR(Synthetic Aperture Radar) technology that collecting images from all weather conditions. In recent days, with development of highly efficient IC and lightened system technology, there are significant increase of researches and demands to make SAR sensor as a payload of UAV. Therefore, this paper contains development process and results of small signal generator and RF device as a core module of SAR system based on the digital device of DDS.
송경민(Kyung Min Song),김종필(Jong Pil Kim),최길웅(Kil Ung Choi),민수기(Su Gee Min),황성욱(Sung Ook Hwang),고승권(Seung Kwon Koh),조숙(Suk Cho),이우영(Woo Young Lee) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.5
Tuberculosis of the uterine cervix is a rare disorder and the cervix is reported to be involved in 5-15 percent of the case of genital tuberculosis. It is discovered incidentally in most cases. The genital lesions are secondary to tuberculosis elsewhere, usually, the lungs. Primary cervical tuberculosis is very rare. The cytologic diagnosis of cervical tuberculosis is difficult. The histological diagnosis of genital tuberculosis presents no problems when the typical caseating necrosis and Langhans giant cell granulomas are present in tissue. And the presence of tubercle bacilli in biopsy specimens as well as in cultures of one specimen confirmed the diagnosis. We report a case of tuberculosis of the cervix confirmed by histologic examination with brief review.
소형 무인기 SAR 탑재체 개발을 위한 FPGA 기반의 DRFM 신호 처리 장치 설계
송경민(Kyoung-min Song),이우경(Woo-kyung Lee),이명진(Myeong-jin Lee) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
This paper describes the design and development of FPGA variable based DRFM signal processor for small UAV SAR. The desired bandwidth of the signal is 100 MHz DRFM with I and Q combination. The system contains both DRFM signal generator and wide band data storage module in a single digital board. The measurement results of the signal loop-back test with 9.5 GHz I/Q modulator will also be described.
CFD를 이용한 디젤 엔진 흡입용 공기정화기 성능에 관한 연구
송경민(Kyeongmin Song),김종순(Jongsoon Kim),김인관(Inkwan Kim),김영수(Youngsoo Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, numerical analysis to develop optimal dust collector having an axial inlet cyclone was performed for the 3 dimensional flow field with a control volume including gases and particles. We applied a commercial code FLUENT for calculating the flow distribution and the pressure drop. The realizable k-ε turbulence model was used to obtain the analytical results and the major parameters were the geometrical dimension of helical guide vanes, the inner diameter and length of cylindrical part. Finally we found out and recommended one dust collector that showed appreciable performance improvement. The experiment for confirming the numerical results was conducted by KS R 1041. From the numerical analysis and the experimental test, it was seen that the specified collector recommended in this study had dust collecting rate of about 99.91% and the ventilation resistance of 23.9mbar, and was more effective than old one that had been conventionally used in real work field.