• 정보학연구
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• 제6권4호
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• pp.81-91
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• 2003

본 논문은 가정내 설치되어 있는 전력선을 이용한 스마트 홈 구축에 적합한 9.6Kbps 전력선 통신 시스템 구현에 관한 것이다. 제안한 전력선 통신 시스템은 가변 감쇄 특성과 가전기기에 의해 발생되는 각종 잡음들, 그리고 각종 가전기기 접속에 의한 임피던스 특성 변화등에 강한 신호 방식으로 100KHz~200KHz 대역 확산 주파수와 선형형태의 Chirp 신호를 사용하였다. 전력선통신 환경과 유사한 의사 부하 망을 제작하여 구현한 시스템에 대한 성능 실험을 하였다. 실험결과 의사 부하망 환경에서의 통신은 매우 만족하게 이루어졌으며, 구현된 Chirped-SS 방식의 9.6Kbps전력선 통신 시스템이 스마트 홈 구축에 있어서 상용화 할만한 성능을 가짐을 확인할 수 있었다.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2000년도 춘계학술대회 학술발표 논문집
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• pp.187-190
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• 2000

Chua's circuit is a simple electronic network which exhibits a variety of bifurcation and attractors. The circuit consists of two capacitors, an inductor, a linear resistor, and a nonlinear resistor. In this paper, a transmitter and a receiver using two identical Chua's circuits are proposed and synchronizations of a power line are investigated. Since the synchronization of the power line system is impossible by coupled synchronization, theory having both the drive-response and the coupled synchronization is proposed. As a result, the chaos synchronization has delay characteristics in the power line transmission system caused by the line parameters L and C.

• 제어로봇시스템학회논문지
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• 제9권3호
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• pp.204-209
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• 2003

The line-of-sight stabilization system is an equipment which is loaded on a vehicle and stabilizes the direction of the line-of-sight of the vision sensor to obtain a not-swayed image in the existence of external disturbances. To obtain accurate Euler angles and angular velocities simultaneously we usually need a control system which uses high-price inertial sensors including Vertical Gyro(VG) or Rate Integrating Gyro(RIG). In this paper, we design and implement a control system of a gimbal, which is a line-of-sight stabilization system using a low-cost mixed algorithm of a rate gyro and an accelerometer instead of a VG and a RIG. In the experiment where we laid the implemented line-of-sight stabilization system on the rate table. we can see the stabilized performance to external disturbances.

• 제어로봇시스템학회논문지
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• 제16권1호
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• pp.40-47
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• 2010

This paper presents a simultaneous localization and mapping (SLAM) of an indoor hallway environment using Rao-Blackwellized particle filter (RBPF) along with a line segment as a landmark. Based on the fact that fluent line features can be extracted around the ceiling and side walls of hallway using vision sensor, a horizontal line segment is extracted from an edge image using Hough transform and is also tracked continuously by an optical flow method. A successive observation of a line segment gives initial state of the line in 3D space. For data association, registered feature and observed feature are matched in image space through a degree of overlap, an orientation of line, and a distance between two lines. Experiments show that a compact environmental map can be constructed with small number of horizontal line features in real-time.

• 산업경영시스템학회지
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• 제3권3호
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• pp.35-39
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• 1980

Although the product line produces a large volume of goods in a relatively short time, once the product line is established there are numerous problems that arise in connection with this product line. One of these problems is the problem of balancing operations or stations in terms of equal times and in terms of the times required to meet the desered rate of production. The objective of line balancing is minimizing the idle time on the line for all combinations of work stations subject to certain restrictions. In general, there are two types of line-balancing situations : (1) assembly line balancing and (2) fabrication line balancing. Two approaches to the assembly line balancing problem have been used. The first assumes a filed cycle time and find the optimum number of work stations. The second approach to the assembly line balancing problem assumes the number of work stations to be fixed and systematically coverages on a solution which minimizes the total delay time by minimizing the cycle time. Here the cycle time is determined by the longest station time. In this paper, by using the second approach method, a general mathematical model, problem solutions, and computer program for the assembly line balancing problem is presented. Data used is obtained from the company which has been confronted with many problems arising in connection with their assembly line.

• 전기전자학회논문지
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• 제14권3호
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• pp.244-249
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• 2010

수중의 미립자 계수를 위한 Line-CCD를 이용한 수중광학 시스템을 구현하였다. 미립자 계수 측정을 위하여 680nm Laser diode를 광원으로 사용하였다. 광학시스템을 동작확인을 위해 수중 인공탱크 및 해양에서 실험을 하였다. 시스템의 상 하강 운동 시, 마이크로프로세서(FPGA)의 신호 전달(센서의 신호검출)을 통하여 미립자 계수를 알 수 있다. 시스템의 알고리즘은 또한, 깊이에 따른 압력, 온도, 계수 값을 실시간으로 분석한다. 실험을-통해 광학센서 시스템의 높은 정확도를 보여주었다. 따라서, Line-CCD를 통한 실시간 측정 가능한 수중광학 시스템을 제안 하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.58-58
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• 2002

Recently Many technologies of the P.L.N (Power Line Network) are introduced for an efficient communication. P.L.N transmits information using power line channel. A medical information transmission system is proposed in this paper for the effective transmission. The Power Line Networks have an advantage in low cost because it uses existent power line. It can be easily applied anywhere that a power line socket is available. But the power line channel is very noisy, because many electronic devices in generate electronic noise in modulated signals. This problem should be considered carefully in the design of medical information transmission system using P.L.N. The proposed system can be applied...I propose a telemedicine system using the power line network.

• 제어로봇시스템학회논문지
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• 제5권1호
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• pp.54-61
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• 1999

Objective of the research is to put the vast and complex fault tracking knowledge of human experts in semiconductor production line into the knowledge base of computer system. We mined the fault tracking knowledge of domain experts(engineers of production line) for the construction of knowledge base of the expert system. Object oriented fact models which increase the extensibility and reusability have been built. The rules are designed to perform the fault diagnosis of the items in production device. We have exploited the evidence accumulation method to assign check priority in rules. The major contribution is in the overall design and implementation of the nile base and related facts of the expert system in object oriented paradigm for the application of the system in fault diagnosis in semiconductor production line.

• 한국위성정보통신학회논문지
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• 제12권2호
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• pp.42-45
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• 2017

전력선통신 시스템에서는 전력망을 활용한 통신 방식을 사용하기 때문에 일반적 통신선로를 활용한 통신 방식에 비해 잡음이 많고, 이것으로 인한 성능 저하가 문제가 되고 있다. 이러한 잡음으로 인한 성능 저하를 완화시키기 위해, 본 논문에서는 전력선통신 시스템에서의 임펄스 잡음 환경에서 신호를 검출하는 인공지능 알고리즘을 제안한다. 다항식 회귀법을 이용하여 임펄스 잡음 신호의 원신호를 예측하고, 시뮬레이션 결과를 통해 본 논문에서 제안한 인공지능 알고리즘을 적용한 전력선통신 시스템에서 임펄스 잡음 환경내 신호 검출 성능 향상을 입증한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.440-440
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• 2000

In general, camera calibration is consisted of Indoor and Outdoor system. In case of Indoor system, it was optimized experimental condition. However, Outdoor system is different camera parameters for each image that is compared to equaled position. That is, it imply that camera parameters are varied by an environment with light or impulse noise, etc. So we make use of Image sequence because that they provide the more information for each image. In addition to, we use Corresponding line because it has less error than Corresponding point. Corresponding line has also the more information. In this paper, we suggest on-line camera calibration method using the time-varying Image sequence and Corresponding line. So we calculate camera parameters with intrinsic and extrinsic parameters in On-line system.