• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.83-86
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• 2011

최근 에너지/환경의 문제로 HEV(Hybrid Electric Vehicle)이 대두되고 있는데, HEV를 위한 대표적인 기술로서 제동시 에너지로 발전하여 전기를 회수하는 회생제동이 있다. 회생제동기술은 HEV 뿐만 아니라 건설기기, 하이브리드 버스, 전철, 엘리베이터 등에 폭넓게 활용이 가능하다. 회생제동용 에너지 저장원으로서는 고출력 및 환경특성이 우수한 슈퍼캐패시터가 적합하며, 단일 셀이 아닌 수십 ~ 수백 개의 셀이 모듈로 사용되는 만큼, 모듈화 설계 기술이 필요 하다. 수백 개의 셀을 모듈화하기 위해서 개별 셀의 전압을 모니터링 하는 기술과 충방전 시 밸렌싱 하는 기술, 사용환경에 따라 열 관리 기술이 필요하며, 이들 기능을 수행할 수 있는 통합 시스템을 구비하여 안정성과 성능 향상을 하고자 한다.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.79-80
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• 2015

This paper deal with the structure and the operating characteristics of the two-dimensional elevator system and the concept that supports to the circuit design for the driving control of the LIM in the simplest possible way. The Horizontal Axis, The Vertical Axis, that is to say, designed a motor that can move between two dimensions by using two of LIMs, especially this control system was described by a sequence control design drawing. The body of this paper has shown the characteristics and validity of this control design system and also analyzed how to apply operating characteristics of the LIM in the elevator industry.

• Proceedings of the KIEE Conference
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• 2002.04a
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• pp.34-36
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• 2002

This paper addresses an elevator position control scheme in unified control system. Conventional systems have employed independent micro-processors for speed, car, and group control respectively and the car controller generates a velocity command by combining the time-based and distance-based velocity pattern. In this scheme, it is inevitable that an elevator creeps in the vicinity of target floor, or stops abruptly. The proposed control system employs only one high-performance micro-processor, which can execute the car and group control as well as the speed control. It simply generates the desired position trajectory based on time and on-line corrects a velocity pattern to make the position error be zero. Experimental results show the feasibility of the proposed control scheme.

• Journal of the Korean Society for Precision Engineering
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• v.20 no.12
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• pp.89-95
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• 2003

A PID controller integrated with a velocity feedback is designed for fluid power elevator model system in this study. In this case, for outside disturbance load a hydraulic cylinder and a pressure control valve are used. In this method overshoot is reduced and settling time becomes also shorter than the values achieved from the PID controller system only In conclusion a PID controller integrated with a velocity feedback is considered a suitable control method for fluid power elevator system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.55-57
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• 2018

In Simultaneous Localization and Mapping (SLAM), the robot acquire its map of environment while simultaneously localize itself relative to the map. Now a day, a map acquired by the mobile robots limit to specific area, in an indoor environment and cannot able to navigate autonomous between different floors. We propose a design that could able to overcome this issue in order to navigate multiple floors with one end goal mission to a target destination in the course of autonomous navigation. In this research, we consider all the floors have identical structural arrangement. Internet of Things (IoT) playing crucial role in bridging between "things" and Robot Operating System (ROS) enabled mobile robots.

• Proceedings of the KIEE Conference
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• 1999.07g
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• pp.3206-3208
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• 1999

This paper describes the remote fault monitoring system for tower parking facilities. This system consists of central station, remote monitoring equipments and communication equipments. The central station is developed under client-server architecture which composed a DB server, a fault detection client, a status collection client and a A/S client. And the remote monitoring systems are connected to central station by LAN using RAS(Remote Access Service) which is constructed PSTN(Public Switched Telephone Network). This system offers real-time fault detection and status data acquisition of tower parking system.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.62 no.4
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• pp.164-168
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• 2013

Recently, in the elevator of the buildings, such as apartment and office building, the visitor monitoring cameras for surveillance, advertising LCD to provide a variety of information, emergency call devices, and safe driving information sensors are installed. A variety of multimedia data from these devices to the central control office, management office, or to guard room are transmitted in real-time. Each sub-systems in the elevator are installed with a separate lines and operated independently and use different management principals, so integrated management for each sub-systems are very difficult. In this study, we develop a new IP-based multi-channel video surveillance system which is integrated surveillance camera, emergency call devices, communications devices, various sensors in the elevator, DVR, ODM, and can manage all devices by two-way communication and integrated interface. And we evaluated the performance of the developed system.

• The Transactions of the Korean Institute of Power Electronics
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• v.24 no.3
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• pp.147-152
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• 2019

With the recent emphasis on the importance of energy conservation, studies on high-efficiency elevator systems are being continuously conducted. Therefore, pulse width modulation converters are commonly used in traction drives on elevator systems. Wide bandgap devices have been increasingly commercialized, and their application to power conversion systems, such as renewable and energy storage system, has been gradually increasing. In this study, a SiC inverter for an elevator traction drive is investigated. In particular, an inverter is designed to minimize stray and parasitic inductance. Input and output filters are designed by considering switching frequency. The designed SiC inverter reduces volume by approximately 32% compared with that of a Si inverter, and power converter efficiency is over 98.8%.

• Journal of the Korean Society of Safety
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• v.37 no.4
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• pp.51-57
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• 2022

In recent years, the government's urban housing expansion policy has resulted in increased construction and remodeling work of residential houses and apartments, causing more industrial accidents at elevator installation sites. Typically, accidents occur during the installation and dismantling of work scaffolds inside the hoistways or using non-standardized work scaffolds due to their structural instability. In view of this, the present study deals with the development of a standardized elevator system scaffolding that can be safely installed outside the hoistway, securing the work platform inside the hoistway. An improved version of the scaffolding system eliminates the need to enter the hoistway for the scaffolding installation, thereby preventing accidents.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.28 no.3
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• pp.186-195
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• 1999

필자가 재작년 초고층 건축견학을 위해 동경을 방문한 적이 있었다. 오페라 시티를 견학하던 중 갑자기 지진이 일어나 방송이 나오고 있었는데 "지금 일어난 지진의 강도가 얼마이고 빌딩이 견딜 수 있는 범위 안에서 지진이 일어난 것이기 때문에 대피할 필요가 없으니 안심하라"는 내용이었다. 그리고 "엘리베이터는 운행 중 지진이 일어날 때 가장 가까운 층에 이용자를 내릴 수 있도록 하며 지진이 끝날 때까지 완벽하게 통제되어 멈춰있다"고 했다. 지진이 지나간 이후 장내는 전과 다름없이 평온하였다. 그리고 포디움 부분의 연결통로를 지날 때 벽면 사이에서 나는 각종 새소리는 마치 숲속에서 거닐고 있는 것처럼 느낌이 들게 하였다. 이와 같이 완벽한 피난과 방재에 대한 시스템에서부터 보행자를 위한 어메니티 확보 등 거주자의 안전에서 쾌적함에 이르기까지 세심한 배려가 건물곳곳에 배어 있었다.