• Title/Summary/Keyword: RS422

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The implementation of home network using the RS422 Multi-drop mode serial communication (RS422 Multi-drop mode 시리얼 통신을 이용한 홈 네트워크 구현)

  • Byun Pil-sang;Kim Myeung-hwan;Kim Deok-jin;Park Se-hyun;Park Yeoun-sik
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.7
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    • pp.1445-1451
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    • 2005
  • Home-Network is an integrated network of the PC and all electric home appliances in the home so that they can communicate with each other. In the 21th century, here are various technology for Home Network environment such as HomePNA, IEEE 1394, Ethernet Lan and Bluetooth. For Home Network construction, generally, the standard series interface 'RS232' is used to make communication possible between electric home appliances. However Home network using RS232 has a problem. That is, All machines have to be connected to each other with RS232 using Point-to-Point mode. In this case, the system becomes complicated because we have to use circuits as much as there are machines and increased expenses. To improve this problem, In this thesis, designed home network using RS422 Multi-drop mode serial communication and controled it with embedded linux system. And connected RS422 with motors and sensors using PIC to make the home network virtual environment.

The implementation of home network using the RS422 Multi-drop mode serial communication (RS422 Multi-drop mode 시리얼 통신을 이용한 홈 네트워크 구현)

  • Byun, Pil-Sang;Kim, Myeung-Hwan;Kim, Deok-Jin;Park, Se-Hyun;Park, Yeoun-Sik
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.2
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    • pp.512-516
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    • 2005
  • Home-Network is an integrated network of the PC and all electric home appliances in the home so that they can communicate with each other. In the 21th century, here are various technology for home Network environment such as HomePNA, IEEE1394, Ethernet Lan and Bluetooth. For Home Network construction, generally, the standard series interface 'RS232' is used to make communication possible between electric home appliances. However Home network using RS232 has a problem. That is, All machines have to be connected to each other with RS232 using Point-to-Point mode. In this case, the system becomes complicated because we have to use circuits as much as there are machines and increased expenses. To improve this problem, In this thesis, designed home network using RS422 Multi-drop mode serial communication and controled it with embedded linux system. And connected RS422 with motors and sensors using PIC to make the home network virtual environment.

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Research of Real Time Monitoring System Development Using TCP/IP & RS-422 Communication (TCP/IP & RS-422 통신을 이용한 실시간 모니터링 시스템개발에 관한 연구)

  • 이주열;문경록;김재문
    • Proceedings of the IEEK Conference
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    • 2002.06e
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    • pp.165-168
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    • 2002
  • This paper has been studied about the real time monitoring system development using TCP/IP ethernet and RS-422 serial communication link in general communication methods that rocket fire control agents could be monitoring about real time Rocket fire event procedures and be managing total rocket fire courses. Also, this paper has been studied the HMI(Human Machine Interface) control program and algorithm that guarantee confidential control for the Fire Display System.

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Multiple UART Communications Using CAN Bus (CAN 버스를 이용한 다중 UART 통신)

  • Kang, Tae-Wook;Lee, Seongsoo
    • Journal of IKEEE
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    • v.24 no.4
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    • pp.1184-1187
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    • 2020
  • This paper proposes an in-vehicle network controller fully exploiting the advantages of UART (Universal Asynchronous Receiver/Transmitter) and CAN (Controller Area Network). UART is used in 1-to-1 communication and it exploits parity bit for data integrity check. The proposed in-vehicle network controller converts UART into CAN, which enables multiple communications along with 1-to-1 communication. Also, the proposed in-vehicle network controller exploits CRC (cyclic redundancy check) for data integrity check, which increases communication reliability. CAN is controlled by microprocessor, but the proposed in-vehicle network controller can be controlled by any devices compliant with RS-232, RS-422, and RS-485.

Development of UFC/DC Data Communication method for XKO-1 using RS-422 Bus (RS422 버스를 이용한 저속통제기 UFC/DC 데이터 통신 기법 개발)

  • 양승열;김영택
    • Journal of the Korea Institute of Military Science and Technology
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    • v.5 no.2
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    • pp.123-131
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    • 2002
  • ASC(Avionics System Computer) was developed to control weapon delivery and navigation sensors, and to perform man-machine interface with pilots for XKO-1 aircraft. The data communications between ASC and UFC(Up Front Controller), DC(Data Concentrator) were implemented by RS422 serial data bus. Also, SCIL(Standard Computer Interface Library) was designed to facilitate control and management of the computer hardware resources and is embedded in the ASC. These structures have a merit of noise immunity and a reduction of wire harness for signal lines, and enable OFP(Operational Flight Program) programmers to use the SCIL easily without knowing hardware details. Manufactured system was on installed on XKO-1, and peformed for BIT(Built In Test) and interface test with UFC and DC. The test results show that it meets the system requirements.

The Efficient Method for Video Data Streaming via NMEA-0183 (NMEA-0183 기반 영상데이터의 효율적인 스트리밍 기법)

  • Kim, Byoung-Kug
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.24 no.10
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    • pp.1300-1305
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    • 2020
  • Due to the simplicity of communication structure using RS-232 and RS-422, the majority ships have still adapted on these communication interfaces and have constructed their own communication network in the ship. NMEA-0183 is the one of standards for BNWAS(Bridge Navigational Watch Alarm System) and currently being used in many countries. BNWAS utilises diverse sensor devices, GPS, AIS and so on for monitoring the status of ships and their deployments and environmental information(temperature, humidity, wind speed/direction, water temperature/current etc…). This paper proposes the use of any image sensors in NMEA-0183 environment and verifies possibility with certain video qualities through the experiment results. Furthermore the paper gathers videos and monitors the change of their qualities depending on the number of NMEA messages on RS-232 communication link. Finally we make conclusion that our proposal is sufficiently appropriate for ship monitoring system in the NMEA-0183.

The Development of an Automatic Aquaculture System -1. Using a model tank- (양어장 자동화 시스템의 개발 -1. 모형 수조를 중심으로-)

  • KANG Ho-Won;LEE Seong-Ho;KIM Je-Yoon;JEONG Seok-Kwon;KIM Sang-Bong
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.28 no.3
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    • pp.294-300
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    • 1995
  • In aquaculture industrial field, an automatic management and control system is needed to cope with the difficulties such as expensive wage, ripe age of management worker and risk according to the unexpected change of environmental conditions in the aquarium. This paper introduces an automatic aquarium monitoring and control system. The system is developed using PC single board computer. A PC can be connected to multi-single hoard computers, and the communication between PC and single board computers is based on RS-422/485 interfacing method. The physical data of pH, DO, temperature and water level etc. are real-timely treated in the single board computer though individual transducers, transfered to the main monitoring PC through RS-422/485 communication, and those data are graphically shown on the PC monitor. Furthermore, the environmental circumstance can be monitored through the image processing system, and the emergency system can be operated under the condition of environmental incident such as electric power stoppage, DO deficiency, pump shut down and low level water etc.

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전장품 접속을 위한 UART 시리얼 버스 구현에 대한 평가

  • Won, Ju-Ho;Jo, Yeong-Ho;Lee, Yun-Gi;Kim, Ui-Chan;Jo, Yeong-Jun;Lee, Sang-Gon
    • The Bulletin of The Korean Astronomical Society
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    • v.37 no.2
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    • pp.184.2-184.2
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    • 2012
  • 위성의 전장품은 전기적 접속을 위해서 1:1 연결을 하는 Point-to-Point 버스 방식과 여러개의 Slave (Remote Terminal)을 갖고, 일반적으로 1개의 Master (Controller)에 의해서 연결하게 되는 버스 구조를 갖는 접속 채널을 통해서 연결이 된다. 가장 많이 사용되는 방식인 MIL-STD-1553B는 데이터 전송속도가 1Mbps이고, Transformer에 의해서 완전하게 버스와 각 전장품이 완전하게 절연이 되는 구조로, 전기적 고장이 전달되는 것을 방지할 수가 있지만, 설계의 난이도가 높다. 고속 버스는 SpaceWire를 사용하고, 100Mbps이상의 속도를 지원할 수가 있지만, LVDS등의 고속 채널 설계 및 노이즈에 민감한 특성 때문에, 저속의 통신채널에서는 사용하기 어렵다. 저속의 데이터 채널을 위해서는 UART 방식이 사용된다. UART 방식은 RS-422 방식과 RS-485 방식이 사용되지만, 1553B 또는 SpaceWire 등과 같이 프로토콜이 정해지지 않아서, 사용자가 직접 프로토콜을 지정해야하는 문제가 있다. 또한 RS-422은 1:1 방식의 Point-to-Point UART를 위해서 사용되고, RS-485는 버스 방식의 연결을 지원할 수가 있지만, 동시에 여러개의 TX가 enable되는 경우에는 TX사이에 고장을 일으킬 수 있어서, 1번에 TX가 1개만 사용되도록 제어할 필요가 있다. 또한 RS-485방식의 버스를 구현할 경우에는 1553B처럼 와전하게 절연이 불가능하므로, 전기적이나 기능적으로 485버스에 문제가 발생할 경우에 절연과 같은 기능이 지원되도록 구현이 되어야 한다. 본 논문에서는 안정적인 485 UART버스 구현을 위한 기술에 대해서 평가하고 분석하도록 하겠다.

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Design and Implementation of Progress Management System Using Swing Component Based on Internet (Swing 컴포넌트를 이용한 인터넷 기반 공정관리시스템 설계와 구현)

  • Kim, Tai-Suk;Kim, Jong-Soo
    • Journal of Korea Multimedia Society
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    • v.13 no.8
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    • pp.1163-1170
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    • 2010
  • In this paper, in order to develop a remote progress management system through the Internet, we show a design method to make easy maintenance by developing the system with both the JAVA language and GoF Design Patterns. For the system implementation, we added the RS232C and RS422/RS485 communication modules to PLC(Programmable Logic Controller) in the control box which provide the real time status data of machines. Also we set up the RS232C to Ethernet converter based on wireless environment to communicate the PLC control data. We use JAVA Swing components to implement the multi-tier architecture system supported the GUI of the Applet and Frame at the same time so that the manager grasps the progress of work easily at the remote machines through the Internet. The key objective of the multi-tier architecture is to share resources among clients, this proposed system can help to develop the software to control the remote machine, and also it has the advantage that developer who wants to make a similar software can make easy to add new function reusing the existing codes.