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송진호(Jinho Song),오인영(Inyoung Oh),장길상(Gilsang Jang),손문구(Moongu Son),고광희(Kwanghee Ko) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.12
객체 3D 데이터를 얻는 방법은 기기 발전으로 인해 다양화되고 있다. 그중 널리 쓰이는 방법 중 하나는 마커기반 정합으로 해당 방법을 사용하면 저비용 장비만으로 객체에 대한 3D 정보를 간편하게 얻을 수 있다. 그러나 마커기반 정합은 탐지된 마커 정보에 의존하고 있고, 마커 관련 정보가 손실 될 경우 정합이 제대로 수행되지 못해 정확한 3D 정보를 얻지 못한다는 문제점이 있다. 본 논문은 이와 같은 단점을 극복하기 위해 실시간으로 촬영 시 매 프레임마다 마커기반 정합 성공 여부를 체크하고, 실패시 과거 프레임들에서 마커 정보를 가져와 보안하는 알고리즘을 제안한다. Currently various 3D data acquisition method are developed, and one of the popular methods is marker-based registration method. People can conveniently obtain 3D geometric information of the object using low-cost scanners by using markers. But, it is difficult to obtain accurate 3D data if some makrer information is lost during acquisition. Therefore, this paper proposes the framework to check whether marker registration is successfull or not for each frame, and bring marker information from previous frames if the framework determines the regisration is likely to fail.
송진호(Jinho Song),송철기(Chul Ki Song),김건상(Kun Sang Kim),홍진석(Jin Seok Hong),김홍섭(Heung seob Kim),오재응(Jae-Eung Oh) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
"Development of Active Noise Control System for Vehicle's Muffler" is developing an active muffler system capable of attenuating low frequency noise levels and simultaneously improving engine performance. Its concepts will utilize a digital signal processing computer, with a cancelling actuator connected to the engine via a straight-through pipe, to cancel unwanted engine exhaust noise. With fast clock speed of 20MHz, the DSP chip allows for rapid adaption to a car engine speed changes.<br/> Sensing devices located within the Active Muffler System detect exhausted noise generated by the engine. The sensing devices relay the noise, in the form of electrical signals, to the DSP computer. The DSP analyzes the incoming information and, in response, generates mirror image elecrical signals. These inverse signals are then introduced, through transducers, into the Active Muffler System canister. Within miliseconds, cancellation occurs. Through these cancellation process, considerable noise reduction will be attatined.<br/> In this study, active muffler was designed and manufactured for exhaust noise reduction of commercial vehicle, then simulation and experiment of real vehicle was conducted.<br/>
송진호(Jinho Song),지홍섭(Hongsub Jee),문대한(Daehan Moon),김도형(Do-Heyong Kim),양오봉(O-Bong Yang),정채환(Chaehwan Jeong) 한국태양광발전학회 2019 Current Photovoltaic Research Vol.7 No.2
The high density module (HDM) has advantages for its larger active area and smaller current density. This new way of making a photovoltaic (PV) module method has benefit for increasing module power with the same installed area. Because HDM consisted with serially connected PV strings, loss of strings during the fabrication process can increase the overall production cost.1-2 This study investigates the rework conditions of the shingled strings with electrically conductive adhesives (ECA). By heating the electrically connected area of a fabricated string, cured area become soft and a string can be detached for the rework process. After rework process, a refabricated string showed 5~10% increased output power compared to before rework process and reached to the 90~95% output power compare to the undamaged strings.
황유모(Humor Hwang),장철호(Chulho Chang),송진호(Jinho Song) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
For large capacity optical CDMA networks, we propose a shared-type encoder/decoder based on an tunable wavelength conveter (TWC) and an arrayed waveguide grating (AWG) router. Feasibility of the structure of the proposed encoder/decoder for dynamic code allocation is tested through simulations using three types of wavelength/time 2-D codes, which are the generalized multi-wavelength prime code(GMWPC), the generalized multi-wavelength Reed-Solomon code(GMWRSC) and the matrix code. Test results show that the proposed encoder/decoder can increase the channel efficiency not only by increasing the number of simultaneous users without any multiple-access interference but by using a relatively short length CDMA codes.