• JOURNAL OF ELECTRICAL WORLD
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• s.286
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• pp.64-69
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• 2000

20세기에 있어서의 비약하는 산업계의 주축으로서 철강시장은 급속히 확대되었고 그와 더불어 신기술의 개발과 도입에서도 선도적 역할을 다하여 왔다. 특히 이 4반세기는 반도체기술의 진보와 함께 컴퓨터, 플랜트 컨트롤러, 드라이브 시스템 등 전기제품은 비약적인 진화를 이루어 왔다. 현재는 중국$\cdot$아시아$\cdot$남미를 중심으로 철강제품의 수요가 증가하여 설비투자도 확대되고 있다. 그러나 북미$\cdot$유럽$\cdot$일본에서는 생산능력과 수요와의 사이에 수급공백이 있어 이전과 같은 시장만큼의 신장은 기대할 수 없는 실정이다. 이와 같은 상황하에서 철강유저의 투자목적을 합리화$\cdot$성력화$\cdot$제품품질의 향상에 두고 있어, 미쓰비시전기는 ''경쟁력 있는 제품을 만들기와 총투자코스트의 최소화''를 서포트하는 제철플랜트용 전기제품의 제공을 지향하여, 그림에 표시하는 것과 같은 4개의 어프로치로 이에 대응하고 있다. 고품질화와 자동화에 대하여는 종래의 품질제어를 능가하는 초안정화 시스템의 적용, 프로세스의 이상 검지와 자동복구에 의한 완전 노터치 오퍼레이션의 실현, 인텔리전트 센서에 의한 프로세스의 가시화로 오퍼레이터가 최종판단을 용이하고 정확하게 할 수 있는 환경을 제공한다. 고효율화$\cdot$에너지 사용합리화에 대하여는 고역률 전원을 추구하여 고효율 드라이브장치와 모터를 제공한다. 글로벌 스탠더드화에의 대응으로서는 네트워크의 오픈화에 의한 멀티벤더 환경, 범용 하드웨어에 의한 오픈 HMI(Human Machine Interface)을 제공하고 있다. 플랜트의 신속한 가동과 리모트 메인터넌스 환경을 실현하기 위하여 플랜트 시뮬레이션 시험의 실시로 공장출하 품질의 향상을 도모한다. 또한 연구센터로부터의 원격감시와 트러블해석 서포트를 쉽게 할 수가 있다. 나아가 최근에는 급격한 기세로 신장되어 온 멀티미디어 기술, 인터넷 기술, 인트라넷 기술, 모바일단말, 화상압축기술 등에 의하여 원격집중감시, 현장과 중앙 쌍방향 협조보수작업, 버추얼 리얼리티 응용시스템이 현실화 되고있는 실정이다. 이들 IT(Information Technology)솔류션은 금후의 제철플랜트의 시스템을 크게 바꾸어 나가는 것은 물론 사업 경쟁력 강화의 키 테크놀로지가 될 것이다. 앞으로 미쓰비시전기는 제철플랜트에 대하여 유저니즈를 IT 솔루션으로 전개, 제공해 나가고자 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.11
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• pp.5506-5511
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• 2012

u-Wellness is widely applicable to individuals and medical service providers such as hospitals and it includes u-fitness and video health counselling services at the side of the provider and stress management, obesity management, and the amount of exercise at the side of the individual. In this paper, we design and implement a smart health care system which uses the authentication device to identify an individual and the user's smart phone. Our system records and manages the amount of exercise on the basis of the prescription of health care professionals through the exercise equipment and Wi-Fi communication. Therefore, our system helps user do optimized amount of exercise through the health care professional's prescription. And our system quantifies the results of the measurement of body fat measuring machines and experts to build the database and automatically schedule.

• Journal of Digital Contents Society
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• v.16 no.2
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• pp.197-205
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• 2015

These days due to the introduction of the subject classroom system, the classrooms for the subject are arranged and various advanced educational equipment is provided in the classroom such as the actual object image processor, electronic blackboard, and educational photographer which are helpful to the class. With the increase of these equipments, the number of remote controller of individual educational equipment also increases, therefore it is complicate to manage the remote controllers and teachers need to learn the usage of them. So the system supports a remote control for managing the educational equipment by the one remote controller and the instructional supplement. The system consists of the hardware which is similar to popular remote controller and the software which is installed on the teacher's PC and supports controlling the educational equipments, recording the instruction, writing on the blackboard, and automatic power off of the equipment. By introducing the system the teacher could reduce the time consumed by the equipment's control and useless electric waste.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.8
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• pp.1453-1463
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• 1994

Recently many robot manipulators are used for various areas of industriesand factories. It has been frequently observed that the robot manipulator fails to complete the function when the object changes its original position, Due to the unexpected impacts and vibrations the center and direction of the object would be shifted in many real application. In this study, a visual sensing algorithm for the robot manipulator is proposed. The algorithm consists of two parts : Detection of the object migration and adjustments of the orobot manipulators Tool Coordinate System. The image filtering technique with visual sensor is applied for the first part of the algorithm. The change of illumination intensity indicates the object migration. Once the object migration is detected, the second part of the algorithm calculates the current position of the object. Then it adjusts the robot manipulators Tool Coordinate System. The robot manipulator and the Visual sensor communicate each other using interrupt technique via proposed algorithm. It has been observed that the proposed algorithm reduces the malfunction of a robot manipulator significantly. Thus it can provide better line balance-up of the manufacturing processes and prevent industrial accidents efficiently.

• Journal of KIISE:Information Networking
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• v.30 no.2
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• pp.143-154
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• 2003

There is a growing trend in developing system for distributed mobile system that supports services - job flow management, video conference, replicated data management and resource allocation. Supporting these services, applications have to use causally ordered message delivery. Previous proposals that provide causally ordered message delivery have problems such as communication overhead, message delaying, scalability, computing overload of mobile host. In this paper, we proposed efficient protocol for causally ordered message delivery using the methods that MSS maintains dependency information matrix between MSS and MH, Piggybacking dependency information about each immediate predecessor message. Proposed algorithm, when compared with previous proposals, provides a low message overhead, and low probability of unnecessary inhibition in delivering messages. Also, it consider resource restriction of MH and low bandwidth of wireless communication by computing most of algorithm at MSS, and reduce processing delay by executing causally ordered message delivery a unit of MH.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.8
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• pp.1597-1603
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• 2017

The incidence of fire in underground utility tunnel is lower than other fires, but the damage caused by fire can cause social loss due to social management paralysis as well as economic loss. Hereupon, this paper presents the results of an empirical test on the construction of the underground utility tunnel condition monitoring system using the leakage coaxial cable installed in the underground utility tunnel. For this reason, a verification test was conducted by connecting a inductive coupler 200 Mbps power line communication modem with insertion loss characteristics of $-6{\pm}2dB$ to the installed the leakage coaxial cable installed in the underground utility tunnel. As a result, We confirmed sending/receiving of IP cameras up to 500 m. Therefore, it is judged that it is possible to construct a condition monitoring system for underground utility tunnel by using the leakage coaxial cables installed in the underground utility tunnels without installing additional communication lines for data transmission.

• Journal of KIISE:Software and Applications
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• v.30 no.9
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• pp.829-842
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• 2003

In this Paper, we propose the new face detection and tracking method based on template matching for real-time applications such as, teleconference, telecommunication, front stage of surveillance system using face recognition, and video-phone applications. Since the main purpose of paper is to track a face regardless of various environments, we use template-based face tracking method. To generate robust face templates, we apply wavelet transform to the average face image and extract three types of wavelet template from transformed low-resolution average face. However template matching is generally sensitive to the change of illumination conditions, we apply Min-max normalization with histogram equalization according to the variation of intensity. Tracking method is also applied to reduce the computation time and predict precise face candidate region. Finally, facial components are also detected and from the relative distance of two eyes, we estimate the size of facial ellipse.

• Radiation Oncology Journal
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• v.18 no.1
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• pp.67-72
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• 2000

Background :The authors have developed a Digital image chart(DIC) and digital Radiotherapy Record System (DRRS). We have evaluated the DIC and DRRS for reliability, usefulness, ease of use, and efficiency. Materials and Methods :The basic design of the DIC and DRRS was to build an digital image database of radiation therapy Patient records for a more efficient and timely flow of critical image information throughout the department. This system is a submit of comprehensive radiation oncology management system (C-ROMS) and composed of a picture archiving and communication system (PACS), a radiotherapy information database, and a radiotherapy imaging database. The DIC and DRRS were programmed using Delphi under a Windows 95 environment and is capable of displaying the digital images of patients identification photos, simulation films, radiotherapy setup, diagnostic radiology images, gross lesion Photos, and radiotherapy Planning isodose charts with beam arrangements. Twenty-three clients in the department are connected by Ethernet (10 Mbps) to the central image server (Sun Ultra-sparc 1 workstation). Results :From the introduction of this system in February 1998 through December 1999, we have accumulated a total of 15,732 individual images for 2,556 patients. We can organize radiation therapy in a 'paperless' environment in 120 patients with breast cancer. Using this system, we have succeeded in the prompt, accurate, and simultaneous access to patient care information from multiple locations throughout the department. This coordination has resulted in improved operational efficiency within the department. Conclusion :The authors believe that the DIC and DRRS has contributed to the improvement of radiation oncology department efficacy as well as to time and resource savings by providing necessary visual information throughout the department conveniently and simultaneously. As a result, we can also achieve the 'paperless' and 'filmless' practice of radiation oncology with this system.

• Journal of Digital Convergence
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• v.12 no.4
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• pp.311-318
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• 2014

This paper is to introduce a lighting source controller using high brightness LED to create a clear and reliable condition for an accurate measurement and testing, which is a core technology in clinical image system and mechanical automation system. This controller is designed to supply a stable power in a constant-current system by installing a high brightness LED driver, and to improve the reproducibility of brightness by using 32-bit ARM processor core, dividing brightness quantity into 256 levels, making the remote control and the external interface possible, and preventing and digitizing the brightness inaccuracy caused by errors of resistance values. This controller enables the lighting range to be wide and possible in a low lighting level compared to analog, adds the RS-485 communication function, and makes it for the users to control the on-off function and the dimming level by receiving date from an external device.

• Journal of Institute of Control, Robotics and Systems
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• v.18 no.7
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• pp.650-657
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• 2012

An effective dual-mode camera system(a passive wide-angle camera and a pan-tilt-zoom camera) is proposed in order to improve the performance of visual surveillance. The fixed wide-angle camera is used to monitor large open areas, but the moving objects on the images are too small to view in detail. And, the PTZ camera is capable of increasing the monitoring area and enhancing the image quality by tracking and zooming in on a specific moving target. However, its FOV (Field of View) is limited when zooming in on a specific target. Therefore, the cooperation of wide-angle and PTZ cameras is complementary. In this paper, we propose an automatic initial set-up algorithm and coordinate transform method from the wide-angle camera coordinate to the PTZ one, which are necessary to achieve the cooperation. The automatic initial set-up algorithm is able to synchronize the views of two cameras. When a moving object appears on the image plane of a wide-angle camera after the initial set-up positioning, the obtained values of the wide-angle camera should be transformed to the PTZ values based on the coordinate transform method. We also develope the PTZ control method. Various in-door and out-door experiments show that the proposed dual-camera system is feasible for the effective visual surveillance.