• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
• /
• pp.317-321
• /
• 1989

The FIC(Flat Integrated Circuits)is widely used for good productivity but very difficult for visual identification. The required position tolerance is 0.05mm and orientation tolerance is 0.25 degree for assembly. The research was performed to detect FIC defects and to estimate the placement of FIC within the tolerances. In this study an automatic visual system is developed, which can successfully perform a fine assembly operation using the cartesian robot.

• 한국GIS학회:학술대회논문집
• /
• 한국GIS학회 2009년도 춘계학술대회
• /
• pp.321-322
• /
• 2009

항공기에 장착되어 1개 지점을 수직 및 경사각도로 5면에서 촬영하는 항공용 다각촬영 카메라를 비롯한 항공용 멀티센서는 항공기라는 공간상의 제약으로 인해 다양한 각도로 센서를 고정하기에 어려움이 있다. 또한 항공기 운항 중 기류변화등으로 인해 촬영예상 지역을 벗어나 촬영되기 쉽다. 이에 항공용 센서의 자세를 연직방향으로 유지 시켜주는 기존 항공용 마운트를 활용할 수 있으면서, 다양한 각도로 센서를 고정할 수 있는 장치를 개발하였다.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 1993년도 춘계학술대회논문집; 한국과학연구소, 21 May 1993
• /
• pp.80-85
• /
• 1993

본 논문에서는 디젤 엔진의 탄성지지계에 작용하는 엔진 기진력에 대하여 검토하고, 탄성지지계의 진동 양상과 탄성지지를 통하여 선체로 전달되는 힘 을 계산하는 과정을 정식화하였다. 또한 이 결과를 고무형 탄성지지를 갖는 선박 추진용 디젤엔진과 발전기용 디젤엔진에 적용하여 탄성지지계의 자유 진동과 강제진동 해석을 수행하고 발전기용 디젤엔진의 탄성지지계에 대해 서는 계측을 행하여 계산 결과와의 비교 검토를 행하고자 한다.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 추계학술대회 논문집
• /
• pp.1018-1023
• /
• 2007

Recently, a double deck train is considered as the one of solutions for efficient and comfortable railroad transportation systems on busy lines without any big investment on existing railroad infra-structures in many countries. However, prior to the operations of double deck trains on existing lines, careful investigations should be performed since the double deck trains have big cross sections, high mass centers and no enough spaces for mounting electric equipments. In this paper, several operational cases of double deck trains in other countries have been reviewed for preparing double deck train operations in Korea.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2000년도 하계종합학술대회 논문집(5)
• /
• pp.147-150
• /
• 2000

Manual and predictive defrosting method is used in current refrigerators, which have several problems in terms of energy consumption and efficiency. fuming the defrosting system on by the amount of frost remains to be an important problem which has to be improved by refrigerator manufacturers. The sensing of the amount of frost by FDS(Frost Detecting Sensor) and its proper mounting point are investigated in the paper. Also the realization of actual defrosting system through experiments of operation, energy consumption and sensing mechanism is presented.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2003년도 하계종합학술대회 논문집 Ⅳ
• /
• pp.2375-2378
• /
• 2003

In manufacture of printed circuit boards, one important issue is precisely to measure the three-dimensional shape of the solder paste silk-screened prior to direct surface mounting of chips. This paper presents the 3D shape reconstruction of solder paste using the optical triangulation method based on structured light or slit beam and the measurement algorithm for height, volume. area, and coplanarity on component pads from the 3D range image. Futhermore, statistical process control function is incorporated for process capability analysis.

• 전자공학회논문지A
• /
• 제31A권2호
• /
• pp.39-44
• /
• 1994

A theoretical method has been considered for the analysis of a cylindrical edge-slot antenna which belongs to a class of circumferential slot antennas that are suitable for conformal mounting on conducting bodies of revolution. A coupled integral equation is formulated for unknown magnetic currents of both the coaxial aperture and the edge slot, and solved by the moment method. Theoretical values for reflection coefficient obtained based upon the method are compared with our experimental values and other author's results available. There arre good agreement between them.

• The Journal of the Acoustical Society of Korea
• /
• 제17권4E호
• /
• pp.41-47
• /
• 1998

Microphone is the first link in the speech recognition system. Depending on its type and mounting position, the microphone can significantly distort the spectrum and affect the performance of the speech recognition system. In this paper, characteristics of the speech signal for different microphones and microphone distances are investigated both in time and frequency domains. In the time domain analysis, the average signal-to-noise ration is measure ration is measured for the database we collected depending on the microphones and microphone distances. Mel-frequency spectral coefficients and mel-frequency cepstrum are computed to examine the spectral characteristics. Analysis results are discussed with our findings, and the result of recognition experiments is given.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2003년도 춘계전력전자학술대회 논문집(2)
• /
• pp.520-523
• /
• 2003

In this paper, heatsink design for high power converter is presented. There are many ways of designing heatsink, but air cooling is by far the most used and much more practical than any of the other methods. In this paper, the practical methods of cooling which include the method to reduce a noise and a vibration due to a fan and the method to design a gap resistance and a contact resistance due to mounting force between thyristor and heatsink is proposed. Finally, simulation and experimental results are described to verify validity of the proposed method.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 1996년도 추계학술대회 논문집
• /
• pp.1048-1052
• /
• 1996

함정용 주기관은 내충격 및 고체음 저감을 위하여 이중탄성지지시스템으로 설치되고 있다. 이중탄성지 지에 의한 방법은 기뢰(mines)의 비접촉 수중폭발 공격으로부터 충격손상을 방지하며, 또한 수중으로 고체음이 전파되어 피탐되는 가능성을 저감하는데 그 목적이 있다.(중략)