• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.404-406
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• 2013

An image edge has been utilized as preprocessing procedure in various field such as object detection, object recognition. there are Sobel, Prewitt, Roberts, Laplacian as conventional edge detection methods. existing methods are implement is simple, but edge detection characteristics is insufficient in impulse noise area. Therefore, to compensate the defect of conventional methods, in this paper, an edge detection algorithm using modified mask is proposed.

• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.681-684
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• 2002

In this paper, electrical power subsystem(EPS) simulator for KOMPSAT 2 has been analyzed designed and simulated by object oriented design(OOP) method. To design EPS simulator, the EPS modules, which modeled solar array, solar array regulator, deployment device controller, battery, power control unit, and EPS control unit, are modeled. To verify the EPS simulator, the modules has been simulated. By OOP designs, the EPS simulator is very powerful because this method is applicable to design other EPS simulator.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.190-192
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• 2000

Interworking of legacy TC application and CORBA-BASED one is important to satisfy emerging market demands of the rapid introduction of new multimedia services and building of scalable, flexible, and interoperable service control architecture. For this, we develop generic TC/CORBA gateway on interworking between. TC and CORBA system Generic TC/CORBA gateway can be used for interworking in many fields of telecommunication service control such as INAP, MAP, other TC-based application parts, and mobility management of IMT-2000. Finally, we propose the object pool mechanism for efficient management of TC-user objects and it is helpful for enhancement of scalability and reduction of the response time of remote service operations.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2076-2078
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• 2002

This paper presents an Intelligent Balance Beam Controller(IBBC) which can estimate the inertia of load automatically. Balance Beam controller is a kind of construction tool which can control the attitude of the load hanging in the air such as a beam carried by crane. In our previous work, Balance Beam had been built to control the object in air using a mechanical gyro system having a position controllable gimbal structure. In field application the load inertia for operation is not easy to figure out because the weight and shape which determines the inertia, varies depending on the object to be carried. Therefore it is difficult for a worker to operate a Balance Beam and an accident could be caused occasionally. We designed an automatic load estimator to measure the inertia of arbitrary load by using an angular velocity sensor that is installed on the Balance Beam. Simulation results and current status for implementation are presented.

• Journal of Institute of Control, Robotics and Systems
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• v.11 no.5
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• pp.411-417
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• 2005

In this study, stereo vision system is applied to a mobile manipulator for effective tasks. The robot can recognize a target and compute the potion of the target using a stereo vision system. While a monocular vision system needs properties such as geometric shape of a target, a stereo vision system enables the robot to find the position of a target without additional information. Many algorithms have been studied and developed for an object recognition. However, most of these approaches have a disadvantage of the complexity of computations and they are inadequate for real-time visual servoing. Color information is useful for simple recognition in real-time visual servoing. This paper addresses object recognition using colors, stereo matching method to reduce its calculation time, recovery of 3D space and the visual servoing.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.10
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• pp.886-890
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• 2013

In this paper, a 3D coordinates acquisition method for a mechanical assembly is developed by using multiview X-ray images. The multi-view X-ray images of an object are obtained by a rotary table. From the rotation transformation, it is possible to obtain the 3D coordinates of corresponding edge points on multi-view X-ray images by triangulation. The edge detection algorithm in this paper is based on the attenuation characteristic of the X-ray. The 3D coordinates of the object points are represented on a graphic display, which is used for the inspection of a mechanical assembly.

• Korean Journal of Computational Design and Engineering
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• v.14 no.1
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• pp.50-59
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• 2009

There are two main problems in the current PLC ladder programming practices: First, currently there are no widely adopted systematic design methods to deal with PLC based control systems in the shop floor. So, the control logic design phase is usually omitted in current PLC programming development life cycle. Second, PLC ladder logic provides only microscopic view of system processes. As a result, it is difficult for FA engineers to have overall perspectives about the interaction of system components intuitively during the verification step of logic errors. To solve these problems, this paper proposed object-oriented design and automatic generation method of PLC ladder logic. Based on the proposed method, the computer software to assist the automatic ladder logic generation is also developed.

• Proceedings of the KIEE Conference
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• 1998.07g
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• pp.2237-2239
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• 1998

A limitation is assumed that In this paper, a generalized method is proposed to extract a period of a motion of on object. To detect a periodic motion, we put restrictions on a stationary camera and on a motion of an object. We ca derive the necessary and sufficient condition that an image sequence consists of the projection of the periodic motion by the affine transformation that is a reasonally good approach to the perspective projection. The difficulty of detecting its periodic motion is to select its have period in sequence and to define its width.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.135-136
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• 2018

본 논문에서는 산업현장에서 특정한 물건을 인식하고 판단하여 로봇팔로 운반할 수 있는 딥러닝을 적용한 객체 인식 기반의 로봇 팔 제어 시스템을 제안하였다. 제안한 시스템은 깊이 인식 카메라를 이용하여 3D 이미지를 촬영 하고 딥러닝으로 검출된 객체를 판별 및 분류 후 인식된 객체를 로봇 팔로 피킹 하도록 구현하였다. 이를 통해, 딥러닝과 깊이인식 카메라로 다양한 환경에서 객체를 정확히 분류 및 추적할 수 있도록 해서 스마트팩토리등 다양한 분야에 활용할 수 있는 시스템을 제안하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05a
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• pp.74-76
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• 2004

It is the new promising method of obtaining the information about the state of a surface of a solid body, thin and multilayer structures. An idea of the method consists in reading and analyzing the relations U(t), dU/dt(t), dU/dt(U) on an electrical cell when anodizing an investigated object. By these relation it is possible to control the presence of impurities in the metal on the path of the anodization front, a structure and characteristics of the object being oxidized as well as of an oxide which is being formed during anodizing, the change in composition of the oxide layer, the thickness and composition of metallic and dielectric layers being a part of the layers boundaries.