• Title/Summary/Keyword: 임베디드 네트워크 시스템

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The Design of a Biomedical Signal Measure System Based on Sensor Networks (센서 네트워크 기반의 생체 신호 측정 시스템 설계)

  • Lee, Jin-Kwan;Lee, Dae-Hyung;Jung, Kyu-Cheol;Jang, Hae-Suk;Lee, Jong-Chan;Park, Ki-Hong
    • Convergence Security Journal
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    • v.7 no.1
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    • pp.35-43
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    • 2007
  • The object of this paper is to design a biomedical signal measure systems based on sensor networks for the patient, integrated with computing technology. Using a combination of zigbee RF, embedded hardware and software technologies, as it allows the healthcare center to receive the information on emergency situations and the ordinary state of the patients individually or simultaneously, the healthcare center can copy with quickly a state of emergency and assist the normal life of the patient. In order to meet the low power and other requirements for the proposed system, we introduce a zigbee based RP which is the most suitable solution for improving the performance of our beeper system.

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The Design and Implementation of Embedded Linux-Based Industrial Wireless HMI Software Module (임베디드 리눅스 기반 산업용 무선 HMI 소프트웨어 모듈 설계 및 구현)

  • Choi, Suk-Young;Moon, Seung-Jin
    • Journal of the Korean Institute of Intelligent Systems
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    • v.17 no.3
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    • pp.336-342
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    • 2007
  • Industrial HMI(Human Machine Interface) system is the main element among the factory automation processes and have been used to monitor and control operation and status of machine in factory with PLC. This HMI often brings heavy loads to the system development and difficult decreasing the system because it tends to use a specific system per each manufacturer. Therefore, in this thesis, we have developed an embedded linux-based embedded industrial HMI software modules which can be used for touch panel embedded system to solve these problem. In this module, we have used the Qt/Embedded software component because it can be used by all systems which support C++ compiler without modifying the existing codes. We can design more flexible system and network configuration because we have used the wireless communication module. In this thesis, we implement linux-based HMI software modules which are capable of wireless communication as well as bringing the mobility to the overall system and finally decreasing the system development loads by using the general purpose OS with competitive price.

Interaction cost based software architectural analysis for networked embedded self-adaptive system (네트워크 임베디드 Self-adaptive 소프트웨어의 상호작용 비용에 기반한 구조 분석)

  • Kim, Young-Pil;Yoo, Chuck
    • Proceedings of the Korean Information Science Society Conference
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    • 2008.06b
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    • pp.416-421
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    • 2008
  • Self-adaptive 시스템에서 adaptation은 시스템 운영의 부담으로 작용할 수 있다. Self-adaptive system의 구조적인 고려는 이러한 부담을 줄일 수 있는 방안의 힌트로써 작용 할 수 있다. 본 논문에서는 self-adaptive 시스템을 구성할 때 가능한 소프트웨어 구조인 사용자 레벨 adaptation과 커널 레벨 adaptation을 살펴보고 각 구조에서 대상에 대한 adaptation을 수행할 때 발생하는 상호작용에 따른 비용을 추정하여 비교하였다. 특히 빠른 적응과 다양한 변화에 따른 적응이 요구되는 Networked Embedded Self-adaptive system을 대상으로 하였다. 본 논문은 Self-adaptive S/W 시스템을 설계할 때 기존의 기능적인 고려 외에 구조적인 고려가 필요함을 말하고자 하며 본 논문의 분석 결과는 Selfadaptive 시스템을 설계하고자 할 때 좋은 참고 자료가 될 수 있을 것이다.

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u-Healthcare System for Elders Living Alone (독거노인을 위한 u-Healthcare 시스템)

  • Lee, Wan-Hee;Cha, Seung-Min;Yoon, Ga-Ram;Lee, Bong-Hwan
    • Annual Conference of KIPS
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    • 2010.04a
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    • pp.706-709
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    • 2010
  • 점차 늘어나고 있는 독거노인들의 건강관리를 정보통신 기술을 통하여 시간과 장소 등에 구애 받지않고, 위급 상황이 감지될 경우 즉각적인 조치를 할 수 있는 u-헬스케어 시스템을 설계하였다. 제안한 시스템은 독거노인의 활동량을 분석하고 움직임을 감지하기 위한 기능을 Zigbee와 PIR 센서로 구현하고, 홈 게이트웨이는 임베디드 리눅스 기반 소형 시스템으로 구현하였다. 구현된 시스템을 통해 피보호자의 일일 활동량 및 주간 활동량 정보를 웹브라우저를 통해서 확인하여 위급 상황 발생 시 보호자의 휴대전화로 이러한 정보를 통보하여 구급할 수 있다.

Performance Evaluation of Low Rate Wireless Home Network Embedded DSSS System (저속 무선 홈 네트워크 임베디드 DSSS 시스템의 성능 평가)

  • Roh, Jae-Sung
    • Journal of Digital Contents Society
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    • v.7 no.2
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    • pp.103-108
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    • 2006
  • Short-range wireless communication and networking technologies are becoming increasingly important in enabling useful mobile applications. for example, ZigBee technology is expected to provide low cost and low power connectivity for equipment that needs battery life as long as several months to several years. In addition, ZigBee can be implemented in mesh networks larger than is possible with Bluetooth. The main features of this ZigBee standard are network flexibility, low cost, very low power consumption, and low data rate in an adhoc self-organizing network among fixed, portable and moving devices. Home network/Home automation is one of the key market areas for Zigbee, with an example of a simple network This paper investigates the effect of short range wireless channel on the performance of Zigbee system and DSSS-BPSK signal transmission in AWGN, interference and Rician fading environments. And we investigate performance degradation due to interference and fading effects in short range wireless channel. In particular, the impacts of the fading and interference level on the bit error probability is shown in BER performance figures.

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The embodiment of the advanced EPS with the synthesis system of moving picture (동영상합성시스템을 이용한 개선된 외국인고용관리시스템(EPS) 구현)

  • Kim, Rog-Hwan;Jung, Byeong-Soo
    • Journal of the Korea Society of Computer and Information
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    • v.14 no.9
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    • pp.105-113
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    • 2009
  • This paper is aimed at embodying the optimal system for foreign workforce supply of nation in order to introduce qualified foreign workers at the age of eleven thousand foreigners. It is difficult to employ foreign workers qualified and it makes job rosters' confidence fall down which is the supplementary resources when selecting due to the insufficient job seekers' detailed information. Therefore, the moving control system should be added in current system to deal with these problems. For this, in this paper, we propose that the moving picture embedded system applies to the current EPS utilizing multimedia, network and database technologies as regards adding the function of the moving picture synthesis to recent system. It also suggests the advanced foreign employment control system related to the advanced system which makes employers to hire foreign workers satisfying their requirements and demand.

A Design of Fire Monitoring System Based On Unmaned Helicopter and Sensor Network (무인헬기 및 센서네트워크 기반 화재 감시 시스템 설계)

  • Yun, Dong-Yol;Kim, Sung-Ho
    • Journal of the Korean Institute of Intelligent Systems
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    • v.17 no.2
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    • pp.173-178
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    • 2007
  • Recently, fires happen to occur owing to various factors. However, the demage caused by the fire is eyer increasing because timely actions could not be taken. To reduce the demage, a development of fire detection system which makes it possible to take adequate actions is requited. In this work, a sensor network-based fire detection system which utilizes both sensor nodes equipped with smoke sensor and unmaned helicopter is proposed. The proposed system is composed of unmaned helicopter which can gather the measurement data from the deployed sensor nodes and the embedded system which can get visual information on the firing spot and transmit these images to a remote server computer. The proposed system is applied to actual test bed to verify its feasibility.

Design and Implementation of a Ubiquitous Health Care System based on Sensor Network (센서네트워크에 기반한 유비쿼터스 헬스케어 시스템의 설계 및 구현)

  • Kim, Jeong-Won
    • The Journal of the Korea Contents Association
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    • v.8 no.1
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    • pp.143-151
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    • 2008
  • In this paper, we have implemented a ubiquitous healthcare system that can measure and check human's health in anytime and anywhere. The implemented prototype are composed of both front-end and back-end. The front-end have several groups: environment sensor group such as temperature, humidity, photo, voice sensor, health sensor group such as blood pressure, heart beat, electrocardiogram, spo2 sensor, gateway for wired/wireless communication, and RFID reader to identify personal. The back-end has a serial forwarder to propagate measurment results, monitor program, and medical information server The implemented sensor node constructs a sensor network using the Zigbee protocol and is ported the tinyOS. The data gathering base node is linux-based terminal that can transfer a sensed medial data through wireless LAN. And, the medical information server stores the processed medical data and can promptly notify the urgent status to the connected medical team. Through our experiments, we've confirmed the possibility of ubiquitous healthcare system based on sensor network using the Zigbee.

Reliability Evaluation for the Avionic Embedded System (항공용 임베디드 시스템 하드웨어 신뢰성 평가)

  • Kim, Byeong-Young;Lee, Dong-Woo;Na, Jong-Wha
    • Journal of Advanced Navigation Technology
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    • v.13 no.1
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    • pp.19-26
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    • 2009
  • Air Traffic Management (ATM) system requires extremely high reliability for the safe and dependable operations in the airport. This paper reports a study on the reliability of the prototype ATM hardware system including the servers and local area networks. Reliability Block Diagram and Fault Tree Analysis on the prototype ATM hardware were performed.

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A Study on Translating Control Languages into Java Languages for Heterogeneous Computing Environment (이 기종 컴퓨터 환경을 위한 제어 언어의 자바 언어 변환에 관한 연구)

  • 은준석;정대교;김석찬;유원희
    • Proceedings of the Korean Information Science Society Conference
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    • 1998.10b
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    • pp.428-430
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    • 1998
  • 기존 제어 시스템을 위한 언어들은 기기에 따라서 많은 차이가 있어 호환성에 문제가 있었고 구문 자체가 제어기기 중심으로서 조건, 제어문 작성이 어려워서 일l반 프로그래밍 언어에 익숙한 사람은 프로그래밍하기에 어려운 점이 많았다. 본 논문에서는 제어 언어들이 다양한 하드웨어 기종에서 사용이 가능하도록 객체 지향 프로그래밍 언어인 자바로 변화하는 과정을 다룬다. 제안한 자바 프로그램은 기기의 제어 목적의 퍼스널(Personal) 자바나 임베디드(Enbedded) 자바와 달리 표준적인 자바를 사용하기 때문에 제어 시스템에서 뿐 아니라 모든 대상의 하드웨어에서 사용이 가능하며 사용자는 각 시스템에 맞는 언어를 배울 필요가 없고 확장성도 뛰어나다. 단 자바는 기존 컴파일 언어보다 느리고 네트워크상의 과부하 대처 능력이 부족하여 발생하는 문제점이 있었는데 그 해결방안으로 시간 제약 구문을 제시하여 자바의 제어 시스템 활용능력을 높인다.