• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.445-449
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• 1993

The role of a robot becomes more important as factory automation is widely spread in the manufacturing industry. An off-line program system has been required for uninterruption of production lines because it can save cost and time spent in adjusting a robot to a new workcell. The objective of this paper is to develop our own OLP system for a SCARA type FARA robot with four axes. Three-dimensional graphic results are presented for the case when the robot is simulated using the computed torque method with a PD controller and the continuous path trajectory planning.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2000.04a
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• pp.543-548
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• 2000

In this study, an interactive programming method for robot in electronic part assembly task is proposed. Many of industrial robots are still taught and programmed by a teach pendant. The robot is guided by a human operator to the desired application locations. These motions are recorded and are later edited, within the robotic language using in the robot controller, and play back repetitively to perform robot task. This conventional teaching method is time-consuming and somewhat dangerous. In the proposed method, the operator teaches the desired locations on the image acquired through CCD camera mounted on the robot hand. The robotic language program is automatically generated and downloaded to the robot controller. This teaching process is implemented through an off-line programming software. The OLP is developed for an robotic assembly system used in this study. In order to transform the location on image coordinates into robot coordinates, a calibration process is established. The proposed teaching method is implemented and evaluated on an assembly system for soldering electronic parts on a circuit board. A six-axis articulated robot executes assembly task according to the off-line teaching in the system.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.11 no.3
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• pp.21-27
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• 2002

In this paper, we have developed a Widows 98 version Off-Line Programming System which can simulate a Robot model in 3D Graphics space. The SCARA robot with four joints (FARA SM5)was adopted as an objective model. Forward kinematics, inverse kinematics and robot dynamics modeling were included in the developed program. The interface between users and the OLP system in the Widows 98's GUI environment was also studied. The developing language is Microsoft Visual C++. Graphic 1ibraries, OpenGL, by silicon Graphics, Inc. were utilized for 3D Graphics.

• Proceedings of the KIPE Conference
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• 2006.06a
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• pp.516-519
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• 2006

LCD TV의 대형화 추세에 따라 백라이트 구동용 인버터의 가격을 낮추고 휘도의 균일성을 보장하기 위해 다수개의 CCFL을 병렬로 구동하는 방식을 채택하고 있다. 그러나 다수개의 CCFL 중에 어느 하나가 먼저 점등되면, 등가 병렬저항이 점등된 램프 하나의 저항으로 나타나게 된다. 이 경우, 점등되지 못한 나머지 CCFL은 전등을 위한 충분한 전압을 받지 못하게 되어 전등이 되지 않은 상태로 머물러 있게 되고, 각 CCFL간의 과전류 편차로 인한 휘도 불균형이 문제점으로 나타나고 있다. 본 논문에서는 LCD 백라이트 구동용 인버터에서 발생하는 전압 전류의 출력 블균형에 대해서 연구하였으며, 이를 바탕으로 OVP(Over Voltage Protection), LCC(Limited Current Circuit), OLP(Open Lamp Protection)의 기존 Analog IC의 보호회로를 통합하여 하나의 MCU로 구성하였다.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2004.11a
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• pp.79-84
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• 2004

In this study, a robot welding programming system is developed for gantry-type robot using a neutral CAD data format. The system automatically extracts welding line data from tile CAD model represented in IGES format and generates a robot program based on the weld line extracted. The welding program is simulated jar verification by using IGRlP, a virtual manufacturing solution. The robot welding programming system is demonstrated with a simple example.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2002.10a
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• pp.250-255
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• 2002

We developed a Off-Line Graphic Simulator which can simulate a robot model in 3D graphics space in Windows 98 version. 4 axes industrial robot was adopted as an objective model. Forward kinematics, inverse kinematics and robot dynamics modeling were included in the developed program. The interface between users and the off-line program system in the Windows 98's graphic user interface environment was also studied. The developing language is Microsoft Visual C++. Graphic libraries, OpenGL, by Silicon Graphics, Inc. were utilized for 3D graphics.

• Journal of the Korean Society of Visualization
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• v.6 no.1
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• pp.59-65
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• 2008

Distribution of spray was measured. Optical Line Patternator (OLP) was used to measure the planar distribution of the spray from a swirl-coaxial type injector. Ambient pressure was varied and injection pressure was fixed in experiment. As ambient pressure increased, spray distribution was changed from hallow cone to solid cone shape, and spray angle was decreased. Limitation in measuring dense spray was found at high ambient pressure condition.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.768-769
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• 2012

DLP 방식의 개인정보 보호 시스템에서는 문서나 메일의 내용을 검색하여 개인정보 관련한 데이터를 검색으로 찾아내는 내용검색을 사용하고 있다. 이러한 내용 검색을 위해서는 네트워크 송수신 기기에서, 혹은 사용자의 컴퓨터에서 모든 문서를 평문으로 유지해야 한다는 점을 강조하고 있다. 그러나 이러한 평문 유지 방식은 현재 빠르게 보편화되고 있는 스마트폰 환경에서는 카메라에 의한 촬영을 막기 어렵다는 점에서, 최근 활발해지고 있는 APT 공격에 대용하기 어렵다는 점에서 문제점으로 지적되고 있다. 더구나 고객 정보를 수집 보관하고 있는 기관의 '직원' 사생활 데이터를 검색힐 수 있다는 점에서 문쩨제가 제기되고 있다. 본고에서는 '개인정보 보호법'의 실시로 설치되고 있는 OLP 시스템의 문제점을 짚어보고, 가능한 대응책을 제시한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.377-380
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• 2004

본 논문에서 우리는 지능형 e-비즈니스를 효과적으로 수행하기 위한 시맨틱 웹 서비스 아키텍처의 구성요소인 마크업인 OWL-S를 CLP(Constraint Logic Program) RuleML로의 확장 및 통합방안에 관한 연구결과를 제시한다. 우리의 주 공헌은 OLP(Ordinary Logic Program), SCLP(Situated Courteous Logic Program) 및 CLP(Constraint Logic Program) 사이의 표현력과 계산력을 비교 및 분석한 근거를 바탕으로 하여 시맨틱 웹, 웹 서비스 그리고 규칙표현 모두가 함께 사용될 수 있는 근거를 제공하였다는 것이다. 본 논문에서 제안된 접근법은 온톨로지를 마크업하기 위한 노력과 규칙을 표현하기 위한 노력이 자연스러운 방법으로 통합될 수 있는 근간을 마련할 뿐만 아니라 규칙들을 이용하여 온톨로지들을 보완하고, 규칙들에서 사용되는 용어들을 온톨로지들에서 정의된 용어들 및 속성들로 표현할 수 있다는 장점을 가진다.

• Journal of the Korean Applied Science and Technology
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• v.35 no.3
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• pp.865-875
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• 2018

Selection of optimum reaction conditions during deoxygenation process of palm oil is essential factor to obtain the maximum yield of bio-jet fuel. In this context, the deoxygenation of palm oil was carried out in a fixed bed reactor with an internal diameter of 1 inch loaded with a 1 wt.% $Pt/Al_2O_3$ catalyst. The composition of the organic liquid product(OLP), which can be utilized as a transportation fuel through the upgrading process, was analyzed by a gas chromatography method. The palm oil/hydrogen ratio and hydrogen pressure in the feed affected the decarboxylation(DCB) and hydrodeoxygenation(HDO) reactions, resulting in a change in the composition of the OLP. As the reaction temperature increased, the continuous cracking reaction of the deoxygenation product was promoted and the product composition in the $C_5{\sim}C_{14}$ region was increased. Thus, the results can help to understand the characteristics of deoxidation reaction of palm oil as well as the subsequent process, hydro-upgrading, to obtain the maximum yield of bio-jet fuel.