• Journal of the Korean Society of Manufacturing Technology Engineers
• /
• 제21권1호
• /
• pp.156-160
• /
• 2012

Recently WCDMA signal transmission technology by large output microwave antenna have showed reduction of human resources and operating expense. But the existing antenna brackets cost is very expensive also its structure and functions are complicated. Unit brackets, suspending some sensors, subjected to acceleration loads, often fail due to self-vibration. To prevent such failures, it is necessary to understand the fatigue failure mode and to evaluate the fatigue life using tests or analysis techniques. The objective of this study is to develop the component test specifications, which are applicable to predict fatigue life at initial product design step, for unit brackets using vibration fatigue technique. So its application is limited to installation and management. In this project, we studied about more convenient bracket for microwave antennas through improvement on the existing antenna bracket's shortcoming and could develop an improved universal antenna bracket system for simple installation and application.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• 제8권3호
• /
• pp.71-79
• /
• 1994

본 연구는 여러 종류의 직류서보코너에서 적용목적에 대해 최상의 성능을 발휘하면서 가장 높은 효율을 갖는 서보모터를 선정하기 위한 인간 전문가의 지식, 경험과 추론 능력을 갖는 전문가 시스템 개발에 관한 것이다. 제안한 프로그램은 비전문가가 적용시스템의 성능조건과 기계적 데이터만을 입력함으로서 고효율 서보모터가 선정되도록 하였다. 전문가 시스템의 추론기관과 지식베이스는 C 언어로 구현하였으며, 데이터베이스는 제조회사에서 제공한 직류서보모터의 카다로그로부터 구성하였다. 서로 다른 정격을 갖는 직류서보모터의 효율을 비교하는데 있어서는 속도-토크의 운전패턴에 따른 평균효율을 기준으로 하였다. 그리고, 서보모터 선정에 관한 수요관리의 전문가 시스템을 실제 사용되고 있는 여러 적용시스템에 대해 검증하여 신뢰성을 확인하였다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• 제26권10호
• /
• pp.72-80
• /
• 2012

In general, electronic conveyor scales are installed in a relatively distributed manner on the crushed rock and sand production site. It is one of the time-consuming and difficult engineering works to monitor and control the plant operation status such as the management of measuring data, malfunction of belt conveyor, and fault of electronic conveyor scale. Therefore, to alleviate the inefficient problems and to monitor the operating plant in the online and remote control room, a remote calibration and real-time monitoring system, which is practically applied to the electronic conveyor scale system and verified by onsite experiment, is developed based on the LabVIEW.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• 제25권8호
• /
• pp.1-7
• /
• 2011

Recently, all-electric house technology became one of the green growth technologies and is integrated with various areas such as electricity, machinery, architecture, material, and etc. Fossil fuel energy is used for heating and hot water supply in the conventional houses but electricity is adopted in the new conceptual houses to maximize advantages of electricity such as amenity, safety, cleanness, and so on. In this paper, an economic analysis is carried out when LED lightings are adopted using the California Standard Practice Test which has been used to estimate the effects of existing DSM (Demand Side Management) programs. The results are able to contribute to the diffusion of all-electric houses and the establishment of basic data and planning for DSM policies.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• 제22권12호
• /
• pp.110-114
• /
• 2008

In recent years, the standard for harmonics has established and applied in many countries. However a harmonic management has not performed for the absence of standard and procedure in Korea. For this reason, the standard establishment for harmonic based on the main purpose of international harmonic standards and property of domestic transmission system is required. This paper describes the software of assessment of harmonic emission limit for customer at HV System using Microsoft Excel.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
• /
• pp.277-280
• /
• 2009

In this paper, the method to apply the RFID technology to schools will be presented in order to effectively integrate and manage various assets in school. The proposed system may be seemed to be very useful of individual school to grasp the status of their assets and also the central government to control and manage the assets scattered far and wide around the country. We also propose the OSN/PMS server based on EPC global standard could be appropriate especially in schools. In addition the proposed system can acquire simultaneously the information from several RFID readers at real time so that it is possible and easy to track the position, the path of moving and the status of assets in the school. To show the usefulness of the proposed system, the prototype of the system has been implemented and conducted. The proposed system seems to be applicable to various fields such as factories, farms, or homes as well as school.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
• /
• pp.59-62
• /
• 2009

When happen the electrical facilities accident the one's diagnosis system of fault cause was constructed by FMEA method Cable accident cause is given by accident cause that can happen in each one's diagnosis and accident probability value. From the verification of system, the one's diagnosis system agreed well with result that analyzed actual state. Thus, the system is judged to be used effectively examine for accident cause of electrical facilities.

• Proceedings of the KIPE Conference
• /
• 전력전자학회 2018년도 추계학술대회
• /
• pp.7-8
• /
• 2018

In this study, we develop a leakage current detection device of lighting installation. The reed switch using in proposed device is activated when the leakage current is generated. We also design a GUI system of a management computer using LabVIEW and administrator's mobile phone app based on IoT. As results, this study is to build an IoT convergence system and it aims to protect people and property by coping with leakage current fault in real time.

• International Journal of High-Rise Buildings
• /
• 제11권3호
• /
• pp.221-226
• /
• 2022

Installation of Structural Health Monitoring (SHM) system is a legal obligation for high-rise buildings over 200 m or 50-floor high in South Korea. CNP Dongyang has developed key technologies for SHM system design, installation, and data analyzing. Also, CNP Dongyang has applied SHM technology to a plenty of South Korea's representative high-rise buildings. The SHM technology, also, could be used in safety management of construction phase, evaluation of structural performance, etc. In this paper, state of the art SHM technologies and their application examples are introduced to give insight for future research and practical use of SHM.

• Journal of Internet Computing and Services
• /
• 제3권2호
• /
• pp.57-67
• /
• 2002

The main goal of this paper is to establish the management network structure by adopting TMN concept. Hence, the management network structure consists in layers; from management application layer to lower physical layer In this paper, TMN-DCN structure is designed. That means, since the current communication network technology has developed so fast and new and more diverse communication networks have appeared, There is a need to process each management information in fast manner, The design method of management network physical structure that enhances the efficiency in network management with prompt transmission and reception of management information is proposed and the architecture is designed as well. Although there is some increase in installation fee for total link that constitutes the physical structure in lower physical layer. network management can be promptly implemented since the structure that can transfer the management information fastest is proposed.