• Title/Summary/Keyword: Transmission system operator

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Design and Implementation of Road Construction Risk Management System based on LPWA and Bluetooth Beacon

  • Lee, Seung-Soo;Kim, Yun-cheol;Jee, Sung-Hyun
    • Journal of the Korea Society of Computer and Information
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    • v.23 no.12
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    • pp.145-151
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    • 2018
  • While commercialization of IoT technologies in the safety management sector is being promoted in terms of industrial safety of large indoor businesses, implementing a system for risk management of small outdoor work sites with frequent site movements is not actively implemented. In this paper, we propose an efficient dynamic workload balancing strategy which combined low-power, wide-bandwidth (LPWA) communication and low-power Bluetooth (BLE) communication technologies to support customized risk management alarm systems for each individual (driver/operator/manager). This study was designed to enable long-term low-power collection and transmission of traffic information in outdoor environment, as well as to implement an integrated real-time safety management system that notifies a whole field worker who does not carry a separate smart device in advance. Performance assessments of the system, including risk alerts to drivers and workers via Bluetooth communication, the speed at which critical text messages are received, and the operation of warning/lighting lamps are all well suited to field application.

Design and Operation of a Multipath Reservation-Based Remote Crane Control System (다중경로 예약 기반 크레인 원격 운전시스템 설계 및 운용)

  • Choi Dae-Woo;Lho Tae-Jung;Kim Jin-Young
    • Journal of Institute of Control, Robotics and Systems
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    • v.11 no.9
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    • pp.816-821
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    • 2005
  • The remote operation of $4\~5$ cranes for container loading/unloading at a port by one operator will dramatically improve loading/unloading efficiency through productivity increase, cost reduction, and so on. This study develops a remote crane control system for container loading/unloading yard cranes. First, a wireless video and audio system to transmit views and sounds of the working field is designed by using 3 web cameras and a microphone. Next, a RSVP-based multi-path reservation method is presented with a view to improving the quality of service in the communication network for remote control. Simulation results show that a RSVP-based multi-path reservation can enhance the reservation success rate in the TCP/IP network.

Long-term Power System Operational Strategy in Korea : Experience And Perspectives during Electric Industry Restructuing Period (한국의 중장기 전력계통 운영 방안에 관한 고찰)

  • Kim, Jin-Yi;Lee, Jo-Lyeon;Kang, Myung-Jang
    • Proceedings of the KIEE Conference
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    • 2002.11b
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    • pp.134-136
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    • 2002
  • In April of 2000, the Korea Power Exchange(KPX) was introduced into Korea electricity market. The purpose of this paper is to describe how the system operator indicates operational risks between the transmission planning and the supply and demand growth to make the market "work" and manage the power system in real time. This paper describes the experiences of kpx about the indication of operational risks including, for example, contingency analysis, voltage profile and fault capacity of three-phase short current.

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Method of Generator Maintenance Scheduling Considering Transmission System (송전계통을 고려한 발전기 예방정비계획 방법론에 관한 연구)

  • Han, Seok-Man;Shin, Young-Kyun;Kim, Bal-Ho H.
    • Proceedings of the KIEE Conference
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    • 2004.11b
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    • pp.104-106
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    • 2004
  • In competitive electricity markets, the System Operator (SO) coordinates the overall maintenance schedules whenever the collective maintenance schedule reported to SO by Gencos in the pool does not satisfy the specified operating criteria, such as system reliability or supply adequacy. In this paper, we divide maintenance schedule problem into master-problem and sub-problem. Master-problem is schedule coordination and sub-problem is DC-optimal power flow. If sub-problem is infeasible, we use the algorithm of modifying operating criteria of master-problem.

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Development of Tele-image Processing Algorithm for Automatic Harvesting of House Melon (하우스멜론 수확자동화를 위한 원격영상 처리알고리즘 개발)

  • Kim, S.C.;Im, D.H.;Chung, S.C.;Hwang, H.
    • Journal of Biosystems Engineering
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    • v.33 no.3
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    • pp.196-203
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    • 2008
  • Hybrid robust image processing algorithm to extract visual features of melon during the cultivation was developed based on a wireless tele-operative interface. Features of a melon such as size and shape including position were crucial to successful task automation and future development of cultivation data base. An algorithm was developed based on the concept of hybrid decision-making which shares a task between the computer and the operator utilizing man-computer interactive interface. A hybrid decision-making system was composed of three modules such as wireless image transmission, task specification and identification, and man-computer interface modules. Computing burden and the instability of the image processing results caused by the variation of illumination and the complexity of the environment caused by the irregular stem and shapes of leaves and shades were overcome using the proposed algorithm. With utilizing operator's teaching via LCD touch screen of the display monitor, the complexity and instability of the melon identification process has been avoided. Hough transform was modified for the image obtained from the locally specified window to extract the geometric shape and position of the melon. It took less than 200 milliseconds processing time.

Suitability Evaluation Method for Both Control Data and Operator Regarding Remote Control of Maritime Autonomous Surface Ships (자율운항선박 원격제어 관련 제어 데이터와 운용자의 적합성 평가 방법)

  • Hwa-Sop Roh;Hong-Jin Kim;Jeong-Bin Yim
    • Journal of Navigation and Port Research
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    • v.48 no.3
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    • pp.214-220
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    • 2024
  • Remote control is used for operating maritime autonomous surface ships. The operator controls the ship using control data generated by the remote control system. To ensure successful remote control, three principles must be followed: safety, reliability, and availability. To achieve this, the suitability of both the control data and operators for remote control must be established. Currently, there are no international regulations in place for evaluating remote control suitability through experiments on actual ships. Conducting such experiments is dangerous, costly, and time-consuming. The goal of this study is to develop a suitability evaluation method using the output values of control devices used in actual ship operation. The proposed method involves evaluating the suitability of data by analyzing the output values and evaluating the suitability of operators by examining their tracking of these output values. The experiment was conducted using a shore-based remote control system to operate the training ship 'Hannara' of Korea National Maritime and Ocean University. The experiment involved an iterative process of obtaining the operator's tracking value for the output value of the ship's control devices and transmitting and receiving tracking data between the ship and the shore. The evaluation results showed that the transmission and reception performance of control data was suitable for remote operation. However, the operator's tracking performance revealed a need for further education and training. Therefore, the proposed evaluation method can be applied to assess the suitability and analyze both the control data and the operator's compliance with the three principles of remote control.

A Scheduling System for MPEG-2 Digital Broadcasting (MPEG-2 디지털 방송을 위한 송출 스케줄링 시스템)

  • Hwang, Kyung-Min;Kim, Jong-Moon;Kim, Tae-Hyun;Cho, Tae-Beom;Jung, Hoe-Kyung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2007.06a
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    • pp.117-120
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    • 2007
  • It has able to be possible that expression and store visual image from analog to digital without picture quality damaged via improvement of video compression technology. And also, It is possible to broadcasting digital image via transmission of digital image on MPEG-2 standardization. for this reason, the broadcasting business owners have converted broadcasting service from analog to digital. But, local SO(System Operator) has a difficult point which secure HD(High Definition) broadcasting program. In this paper, we designed and implemented Scheduling System for MPEG-2 Digital broadcasting which gather HD broadcasting program from major broadcasting business owners(as like MBC, KBS, SBS, etc) and broadcast them.

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Generation & transmission maintenance scheduling in competitive power markets (경쟁시장에서 발/송전설비 예방정비계획에 관한 연구)

  • Han, Seok-Man;Kim, Kyung-Min;Park, Jung-Sung;Kim, Bal-Ho H.
    • Proceedings of the KIEE Conference
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    • 2005.07a
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    • pp.798-800
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    • 2005
  • In competitive electricity markets, the System Operator (SO) coordinates the overall maintenance schedules whenever the collective maintenance schedule reported to SO by Gencos & Transco in the pool does not satisfy the specified operating criteria, such as system reliability or supply adequacy. We propose a two-layer mathematical algorithm amenable to maintenance scheduling problem into master problem and sub-problem. The master problem coordinates the scheduling, and sub-problem, DC optimal power flew, checks the adequacy. The proposed algorithm was demonstrated with a case study.

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A Study on Communication Protocol for Railway Signalling between LDTS and EIS equipments (역정보전송장치와 전자연동장치간 통신 프로토콜에 관한 연구)

  • 황종규;이재호;김종기;박영수
    • Proceedings of the KSR Conference
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    • 2002.05a
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    • pp.516-521
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    • 2002
  • According as railway signalling equipments are computerized recently, necessity of communication protocol for interface between these equipments is increasing, Therefore the research about communication protocol structure that is need according to computerization trend of these signalling goes, especially communication protocol structure for interface between LDTS(Local Data Transmission System) and EIS(Electronic Interlocking System). Analyzed existent protocols that is applied currently for interfaces between above two signalling for this research and also technology analysis of internal/external similar protocols and operator and maker's requirement. With these study finding plain in this paper, explained summary of communication protocol structure for interface between LDTS and EIS.

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Development of Remote Control Transmission based on an One-chip Microcomputer in Speed Sprayer asture Plant Genetic Resources (원칩 마이크로 컴퓨터(MCS-51)를 이용(移用)한 스피드 스프레이어의 원격조종(遠隔操縱) 변속장치(變速裝置) 개발(開發))

  • Jang, Ik Joo
    • Current Research on Agriculture and Life Sciences
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    • v.8
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    • pp.107-113
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    • 1990
  • This study was attempted to develop a remote controllable speed sprayer in order to protect an operator from agricultural chemicals. For the purpose of remote controllable transmission was developed by using one chip microcomputer. The following results could be summarized in this study. 1. Remote controllable transmission developed had not made even a single mistake during the test performed 100 times repeat. Thus, it could that this machine was very accurate. 2. One chip microcomputer was made by machine language and its was with in 3 sec's which was the same as human did. 3. One chip microcomputer which was used in the experiment could be widely used to automation of agricultural machinery, since it is smaller and chiper than any other similar ones such as personal computer, lap tap, one board computer. 4. Since, farm tractor has the same type of transmission as this system, it also could be adapted to farm tractors. 5. In this experiment, transmission lever was remote controll were designed to operate simultaneously. Thus, this system developed was more complicate than conventional system. However, by removing this transmission lever and by mounting the remote controll system at the speed sprayer, it would be higher and easier to handle than the conventional one.

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