• Title/Summary/Keyword: safety communication network

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Implementation of Real-time EtherCAT Control System based on Open Source (오픈소스 기반의 실시간 EtherCAT 제어 시스템의 구현)

  • Yunjin Kyung;Dongil Choi
    • The Journal of Korea Robotics Society
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    • v.18 no.3
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    • pp.281-284
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    • 2023
  • Real-time control communication network system is important for developing defense robots because it affects environmental interaction, performance, and safety. We propose a real-time control communication network using the Xenomai real-time operating system and the open-source EtherCAT master library, SOEM. EtherCAT is an Ethernet-based industrial communication method. It has low latency and many functions such as cable redundancy and distributed clock synchronization. We use Xenomai RTOS and Intel NUC to develop the system. Experimental tests demonstrate the Real-time EtherCAT master implementation, and communication with CiA301-based slave devices. The jitter measurement was conducted to validate the real-time performance of the system. The proposed system shows possibility for real-time robotics applications in various defense robots.

Development of Vehicle Condition Monitoring System for Drivers' Safety (운전자의 안전을 위한 차량 상태 모니터링 시스템개발)

  • Lee Jong-Woo;Kim Min-Gyou;Kim Jungkuk;Park Jae-Hyun;Huh Woong
    • Proceedings of the Safety Management and Science Conference
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    • 2005.05a
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    • pp.259-266
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    • 2005
  • In this paper, we developed a vehicle condition monitoring system that checks vehicle conditions, and transmits and displays them to a driver for safety and effective maintenance. We used a CAN controller and transceiver to establish the CAN communication that has been used commonly inside an actual vehicle for the collection of vehicle's status information. To validate the operation of the developed system, we have confirmed the accuracy and stability of data transmission and reception of vehicle information.

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Smart Navigation System Implementation by MOST Network of In-Vehicle (차량 내 MOST Network를 이용한 지능형 Navigation 구현)

  • Kim, Mi-jin;Baek, Sung-hyun;Jang, Jong-wook
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2009.10a
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    • pp.82-85
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    • 2009
  • Lately, in the automotive market appeared keywords such as convenience, safety in presentation and increase importance of part of vehicle. Accordingly, the use of many electronic devices was required essentially and communication between electronic devices is being highlighted. Various devices such as controllers, sensors and multimedia device(audio, speakers, video, navigation) in-vehicle connected car network such as CAN, MOST. Modern in-vehicle network managed and operated as purpose of each other. In this Paper, intelligent car navigation considering convenience and safety implement on MOST Network and present system to control CAN Network in vehicle.

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Design of In and Outdoor communication hub in Vehicular networks (차량 네트워크에서 내·외부 네트워크 연결을 위한 통신허브 설계)

  • Lee, Myung-Sub
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.12 no.3
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    • pp.187-194
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    • 2012
  • Vehicular communication networking is one of the most important building blocks of Intelligent Transportation System(ITS). The vehicular communication network is a wireless communication system enabling vehicles to communicate with each other as well as with roadside base stations. Especially, Wi-Fi based vehicle-to-infrastructure(V2I) communication is an emerging solution to improve the safety, traffic efficiency, and comfort of passengers. In this paper, we proposed a new communication hub platform for vehicles, and explained vehicle communication technology in short. Through car simulation results, we show thar our proposed system reduces signaling interference.

Fieldbus Communication Network Requirements for Application of Harsh Environments of Nuclear Power Plant (원전 극한 환경적용을 위한 필드버스 통신망 요건)

  • Cho, Jai-Wan;Lee, Joon-Koo;Hur, Seop;Koo, In-Soo;Hong, Seok-Boong
    • Journal of Information Technology Services
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    • v.8 no.2
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    • pp.147-156
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    • 2009
  • As the result of the rapid development of IT technology, an on-line diagnostic system using the field bus communication network coupled with a smart sensor module will be widely used at the nuclear power plant in the near future. The smart sensor system is very useful for the prompt understanding of abnormal state of the key equipments installed in the nuclear power plant. In this paper, it is assumed that a smart sensor system based on the fieldbus communication network for the surveillance and diagnostics of safety-critical equipments will be installed in the harsh-environment of the nuclear power plant. It means that the key components of fieldbus communication system including microprocessor, FPGA, and ASIC devices, are to be installed in the RPV (reactor pressure vessel) and the RCS (reactor coolant system) area, which is the area of a high dose-rate gamma irradiation fields. Gamma radiation constraints for the DBA (design basis accident) qualification of the RTD sensor installed in the harsh environment of nuclear power plant, are typically on the order of 4 kGy/h. In order to use a field bus communication network as an ad-hoc diagnostics sensor network in the vicinity of the RCS pump area of the nuclear power plant, the robust survivability of IT-based micro-electronic components in such intense gamma-radiation fields therefore should be verified. An intelligent CCD camera system, which are composed of advanced micro-electronics devices based on IT technology, have been gamma irradiated at the dose rate of about 4.2kGy/h during an hour UP to a total dose of 4kGy. The degradation performance of the gamma irradiated CCD camera system is explained.

Analysis of Domestic and Foreign Frequency Demands for 700 MHz Band and Consideration for Building Public Integrated Radio Network (700 MHz 대역의 국내·외 주파수 수요 분석 및 공공통합망 구축시 고려사항)

  • Park, Duk-Kyu
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.25 no.10
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    • pp.1028-1039
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    • 2014
  • After DTV transition, frequency allocation to efficiently utilize 700 MHz band, which is remained as Digital Dividend, is in progress domestically and internationally. This paper investigates global frequency allocation of 700 MHz band and utilization of the band, and analyzes domestic wireless technology methods and requested frequency bandwidth by use. In addition, the paper suggests what needs to be considered in case of building public integrated radio network that focuses on disaster and safety network; the integrated radio network also includes railway network and e-Navigation.

Implementation Plan of Port Information Network for an E-Navigation (E-Navigation을 위한 항만 정보네트워크 구현방안)

  • Seo, Ki-Yeol;Oh, Se-Woong;Cho, Deuk-Jae;Park, Sang-Hyun;Suh, Sang-Hyun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.11
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    • pp.1927-1933
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    • 2006
  • This paper proposes the implementation plan of information network for an E-Navigation. Firstly, It configures to the network system based on E-Navigation information network using information and communication technology. And then, it builds on the total port network and tuning up the maritime traffic support system. It will expect to the efficiency through information network between ship to ship related pen operator. Building of information network for the E-Navigation, it is to build on the wireless internet infrastructure for the port logistics and traffic safety.

Design and Implementation of Real-Time Vehicle Safety System based on Wireless Sensor Networks (무선 센서 네트워크 기반의 실시간 차량 안전 시스템 설계 및 구현)

  • Hong, YouSik;Oh, Sei-JIn;Kim, Cheonshik
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.8 no.2
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    • pp.57-65
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    • 2008
  • Wireless sensor networks achieve environment monitoring and controlling through use of small devices of low cost and low power. Such network is comprised of several sensor nodes, each having a microprocessor, sensor, actuator and wired/wireless transceiver inside a small device. In this paper, we employ the sensor networks in order to design and implement a real-time vehicle safety system. Such system can inform the safe velocity in a specific weather condition to drivers in advance through analyzing the weather data collected from sensor networks. As a result, the drivers can prevent effectively accidents by controlling their car speed.

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Experiment and Analysis of Session-key Authentication Mechanism based on MANET (MANET 기반 세션키 인증기법의 실험 및 분석)

  • Lee, Cheol-Seung;Jung, Sung-Ok
    • The Journal of the Korea institute of electronic communication sciences
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    • v.10 no.12
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    • pp.1355-1360
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    • 2015
  • Recently MANET application is diversified studies on the MANET routing security and the reliable authentication mechanism is actively in progress. Stand-alone network structure of a MANET is an important field of ubiquitous computing environment of interest, Authentication techniques are already provided safety when applied to MANET reliability and efficiency in a secure authentication mechanism using the session key. However, most of the MANET environment, the model has been based on the assumption that the safety is guaranteed, When applied to an actual network situation, we can not rule out a variety of threats. This study is the testing and analysis to add the malicious node extracted at random to demonstrate the safety and efficacy of the session key certification techniques of the MANET environment.

Formal Verification Network-based Protocol for Railway Signaling Systems

  • Hwang, Jong-Gyu;Lee, Jae-Ho
    • 제어로봇시스템학회:학술대회논문집
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    • 2004.08a
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    • pp.354-357
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    • 2004
  • According to the computerization of railway signaling systems, the interface link between the signaling systems has been replaced by the digital communication channel. At the same time, the importance of the communication link is more pronounced than in the past. In this paper, new network-based protocol for Korean railway signaling has designed between CTC and SCADA system, and the overview of designed protocol is briefly represented. Using the informal method for specifying the communication protocol, a little ambiguity may be contained in the protocol. To clear the ambiguity contained in the designed protocol, we use LTS model to design the protocol for this interface link between CTC and SCADA, the LTS is an intermediate model for encoding the operational behavior of processes. And then, we verify automatically and formally the safety and the liveness properties through the model checking method. Especially, the modal ${\mu}$-calculus, which is a highly expressive method of temporal logic that has been applied to the model checking method. It will be expected to increase the safety, reliability and efficiency of maintenance of the signaling systems by using the designed protocol for railway signaling in Korea.

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