• Journal of the Korean Society of Systems Engineering
• /
• v.10 no.2
• /
• pp.43-50
• /
• 2014

The Centralized Traffic Control(CTC) System of Urban Railway is an element(subsystem) of the Urban Railway system to aim safety operation and efficient management of rolling stock in accordance with a train scheduling program in train operation ways. That's why the CTC System must be developed considering systematic and safety-guaranteed methods such as RAMS(Reliability, Availability, Maintainability, and Safety) refereed to IEC standards. The CTC System is consists of rolling stock, signaling, power supply, communication, and mechanical equipment and preforms control and remote monitoring functions. The technical activities considering safety process are very important at such an early stage of development in a railway project. This paper introduces RAMS activities and an independent safety assessment by $3^{rd}$ Party focused on a safety applied to a development of the CTC system of Urban Railway and proposes the experiences as well practices.

• Journal of the Korean Institute of Telematics and Electronics C
• /
• v.34C no.7
• /
• pp.92-105
• /
• 1997

In this paper, we design andimplement a prototype of the distant ITS (Intelligent tutoring system): English tutor which is running on the information superhighway. It is designed for the purpose of teaching the english conversation effectively to the students whose mother tongues are not english. The tutor could chosse appropriate tutoring strategies and teach the students effectively according to the contents of the student model. And also it is based on the remote data management client/Server model and implemented on SPARC station and pentium PC using oracle 7.3 and power Builder 5.0.

• Journal of the Korea Society of Computer and Information
• /
• v.15 no.11
• /
• pp.185-193
• /
• 2010

In this paper, we Provide context-aware services based on UPnP Device Module including sensor unit in existing PLC network without additional infrastructure. so existing PLC devices are controlled based on knowledge context and can be used in a ubiquitous environment. And efficient remote control and device management based on UPnP can also be provided.

• Proceedings of the KSRS Conference
• /
• 2008.10a
• /
• pp.119-121
• /
• 2008

Pattern matching is increasingly being employed in various researches as health care service, RFID-based system, facility management, and surveillance. Geosensor filter correlates a data stream to match specific patterns in distribution environments. In this paper, we present a geosensor query language to represent efficiently declarative geosensor query. Geosensor operators are proposed to use for fast query processing in terms of spatial and temporal area in distribution environments. We also propose a geosensor filter to match new query predicates into incoming stream predicates. Our filter can reduce the volume of transmission data and save power consumption of sensors. It can be utilized the stream data mining system to process in real-time various data as location, time, and geosensor information in distribution environments.

• Proceedings of the KIEE Conference
• /
• 2008.07a
• /
• pp.2297-2298
• /
• 2008

최근, 공장 수용가들은 원격에서 인터넷 기반으로 전력정보를 감시, 상태를 진단, 제어함으로써 전기 사용의 안전성과 신뢰성 그리고 편이성을 제고할 수 있는 디지털 분전반을 필요로 하고 있다. 따라서 본 논문에서는 3상 수용가 시스템에서 요구되는 3상 디지털 분전반을 위한 전력관리 모듈이 설계된다. 제안되는 전력관리 모듈은 3상 4선식 전력공급방식으로 설계되며 3상 전력관리 디바이스가 전력신호 전처리기로 채택된다. 그리고 ARM 코아 기반의 32비트 프로세서가 제어모듈의 핵심 프로세서로 채택되며, 이더넷 컨버터를 통해 TCP/IP를 기반으로 하는 원격관리를 실현한다.

• Proceedings of the KIEE Conference
• /
• 1998.07b
• /
• pp.760-762
• /
• 1998

Due to the reinforcement of government's DSM(Demand Side Management) policy. Solid State Meter was introduced in Korea since 1993 and it is applied to the high voltage customer exceeding 100kW in order to equalize daily load curve. In recent days, KEPCO has a Plan to use the Solid State Meter which has a data recording and remote meter-reading function for low voltage customer to introduce the real-time pricing system and reduce peak power in the near future. So, this paper suggests the specification and function of Solid State Meter.

• Proceedings of the KIPE Conference
• /
• 2018.07a
• /
• pp.273-274
• /
• 2018

Recently, many countries around the world are investing heavily in green industries based on green IT technology. The key industry in the green industry is LED. If we replace traditional lighting, we can save a lot of socioeconomic costs. Because it is energy efficient. However, the research and development on maintenance and management are still insignificant about LED lighting. Therefore, after the failure, the post-treatment is delayed and often occurs. In order to solve these problems, it is planned to detect the failure of the LED lighting and to establish a monitoring system that can monitor the situation in real time on the computer or mobile phone of the remote manager using the latest IoT network technology.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.53 no.8
• /
• pp.13-18
• /
• 2016

In Internet of Things (IoT) environment, a variety of smart devices are connected to Internet through various network technologies such as 4G/5G, WiBro, Bluetooth, etc. in order to provide the remote monitoring service such as smart healthcare service, etc. Most standard mobility management protocols based on IETF Mobile IP may not be suitable for Internet of Things (IoT) environments due to constrained power, constrained CPU processing and memory capacity, and large signalling overhead which are inherently accompanied by various devices in IoT environments. In this article, we propose a new mobility management protocol CoMP (CoAP-based Mobility Managemenbt Protocol) for reliable mobility management in IoT environments. The architecture and algorithm to achieve both reliability and simplicity for IoT mobility management are proposed. Finally, performance has been evaluated by both mathematical analysis and simulation.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.67 no.10
• /
• pp.1382-1387
• /
• 2018

There is a high demand for energy efficiency improvement of factories that make up a large part of national electric energy. Therefore, research on smart FEMS technology for monitoring, analyzing and controlling energy consumption patterns is under way, but there is still a lack of research on detailed element technology for communication and control inside the factory. In this paper, we proposed OFDM VLC system based on MODBUS protocol for communication between gateways, sensors, and devices to implement smart FEMS in indoor factory environment. Assuming a conveyor belt load control, we validated the proposed system by simulating the inverter motor control and checking the performance.

• Journal of Drive and Control
• /
• v.18 no.4
• /
• pp.9-18
• /
• 2021

This study proposes a method for creating learning datasets to recognize obstacles using deep learning algorithms in automated construction machinery or an autonomous vehicle. Recently, many researchers and engineers have developed various recognition algorithms based on deep learning following an increase in computing power. In particular, the image classification technology and image segmentation technology represent deep learning recognition algorithms. They are used to identify obstacles that interfere with the driving situation of an autonomous vehicle. Therefore, various organizations and companies have started distributing open datasets, but there is a remote possibility that they will perfectly match the user's desired environment. In this study, we created an interface of the virtual simulator such that users can easily create their desired training dataset. In addition, the customized dataset was further advanced by using the RDBMS system, and the recognition rate was improved.