• Title/Summary/Keyword: Rs interface

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Evaluation of sensor and control interface modules for greenhouse environment control (온실환경 제어를 위한 센서 및 제어 인터페이스 모듈의 성능평가)

  • Lee, Won-Jae;Duc, Ngo Viet;Sung, Nam-Seok;Seo, Young-Woo;Kim, Yong-Joo;Chung, Sun-Ok
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • 2017.04a
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    • pp.137-137
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    • 2017
  • 현재 상용화되어 있는 온실 환경제어시스템의 S/W 및 H/W는 서로 호환이 되지 않아 농민들이 원하는 맞춤형 복합 환경 제어시스템을 운영하는데 어려움이 있다. 따라서 본 연구는 다양한 제어알고리즘 및 장비를 적용시킬 수 있는 호환성이 향상된 온실 환경 제어인터페이스 모듈 성능평가를 목표로 한다. 센서 및 제어 인터페이스 모듈 성능평가를 위해 사용된 제어 시스템은 8 bit MCU가 적용된 전용 개발보드를 사용하였고, RS-232 통신 케이블을 사용하여 온실 환경 측정 데이터 값을 PC에서 수신할 수 있도록 하였다. 또한, 창개폐기, 환풍기를 사용하여 온실 내부 온/습도 환경조성을 하였다. 실험은 정오부터 제어장비를 작동시킨 후 1시간 간격으로 총 3시간 동안의 온실 내 온/습도의 변화량을 계측하였다. 3시간 중 1시간동안의 온/습도 값의 변화량을 계측한 결과 평균값은 각각 $33.21^{\circ}C$, 34.94%이었고 표준편차는 각각 $1.44^{\circ}C$, 2.74% 이었다. 제어 알고리즘은 단순한 ON/OFF 방법을 사용 하였고 총 2가지 제어장비를 사용하였으며 모두 정상 작동 하였다. 1시간동안 온실의 온도는 $30^{\circ}C{\sim}35^{\circ}C$사이를 유지하였으며, 습도는 30%~ 40% 사이로 최초 실험 목표였던 온실 내부의 온/습도 범위를 유지하였다. 이번 실험은 ON/OFF 방법의 제어 알고리즘을 사용하였지만 더욱 정밀한 온실 환경제어를 위하여 PID, 퍼지 제어 알고리즘을 추가하여 기상환경에 따른 제어범위를 더욱 세밀화 할 수 있도록 설계한다면 제어장비에 대한 효율성이 향상될 것이라 기대한다.

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A Study on the Interfacial Reaction of Co/Al Multilayer System (Co/Al 다층 박막 구조 시스템에서의 열처리에 따른 계면 반응에 관한 연구)

  • Kang, Sung-Kwan;Lee, Sang-Hoon;Ko, Dae-Hong
    • Applied Microscopy
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    • v.30 no.3
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    • pp.249-254
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    • 2000
  • We investigated the microstructure, electrical property, and magnetic property of Co/Al multilayer after annealing treatment. CoAl was formed during depositing Co/Al multilayer due to the interfacial reaction. After annealing treatment, $Co_2Si$ was formed at the Co/Si interface. The sheet resistance of Co 2 nm/Al 2 nm multilayer have the lowest value and the Rs of multilayer decreased with the increase of annealing temperature due to the formation of $Co_2Si$ phase. The Ms of 2 nm Co/2 nm Al multilayer have the lowest value and the Ms of multilayer increased with the increase of film thickness.

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Implementation of an Embedded System for Image Tracking Using Web Camera (ICCAS 2005)

  • Nam, Chul;Ha, Kwan-Yong;;Kim, Hie-Sik
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.1405-1408
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    • 2005
  • An embedded system has been applied to many fields including households and industrial sites. In the past, user interface products with simple functions were commercialized .but now user demands are increasing and the system has more various applicable fields due to a high penetration rate of the Internet. Therefore, the demand for embedded system is tend to rise In this paper, we Implementation of an embedded system for image tracking. This system is used a fixed IP for the reliable server operation on TCP/IP networks. A real time broadcasting of video image on the internet was developed by using an USB camera on the embedded Linux system. The digital camera is connected at the USB host port of the embedded board. all input images from the video camera is continuously stored as a compressed JPEG file in a directory at the Linux web-server. And each frame image data from web camera is compared for measurement of displacement Vector. That used Block matching algorithm and edge detection algorithm for past speed. And the displacement vector is used at pan/tilt motor control through RS232 serial cable. The embedded board utilized the S3C2410 MPU Which used the ARM 920T core form Samsung. The operating system was ported to embedded Linux kernel and mounted of root file system. And the stored images are sent to the client PC through the web browser. It used the network function of Linux and it developed a program with protocol of the TCP/IP.

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Development of Internet Web-Based UPS Remote Control System (인터넷 웹 기반 환경을 이용한 UPS 원격제어시스템 개발)

  • 김성환;최주엽;유권종;안현식
    • The Transactions of the Korean Institute of Power Electronics
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    • v.8 no.3
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    • pp.253-259
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    • 2003
  • This paper aims at developing remote control system to control and monitor distributed various devices such as UPS through internet. TCP/IP(Transmission Control Protocol/Internet Protocol) and UPS operated in a row are adopted for the network management protocol and the application device, respectively. For controlling and monitoring distributed devices in realtime, java-environment software is constructed. Also, HelloDevice, general-use interface controller between network device and applied device is proposed. Finally, serial communication such as RS-232C is used between controller and applied device.

Development of Theme Park Management Automation System Using RFID (RFID를 이용한 공원관리 자동화 시스템 개발 연구)

  • Lee, Yang-Weon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.4
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    • pp.871-876
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    • 2005
  • Theme park automation system is developed by using the RFID sensor reader, IIS web server, ASP.NET and MSSQL database in this paper. Its operation is that park entrance people checked automatically when he who possessed the ta8 passed the reader acquisition bound and its tag information is sent to the host computer through the RS-232 data acquisition system. Tag information and time data will be stored in the RFID database tables and reused to extract and distribute the entrance people for the purpose of each arrangement of each entertainment devices. First of all, we developed interface program between host and reader and then, programmed the related web site and database connection function using ASP.NET with $C\#$ and MSSQ. We also design and make an production of external Ant. to extend the acquisition range up to $30\~40$ cm using copper PCB plate. We confirmed the performance through the RFID test bed site.

Characteristics of Symmetric-Shape Parts Shearing on Micro NCT (마이크로 NCT에 의한 대칭형상구멍의 전단특성)

  • Hong N. P.;Kim B. H.;Chang I. B.;Kim H. Y.;Oh S. I.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2002.02a
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    • pp.285-291
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    • 2002
  • The shearing process for the sheet metal is normally used in the precision elements such as a frame of TFT-LCD or lead frame of If chips. In these precision elements, the burr formation prevents the system assembly and needs the additional burr removing process. In this paper, we developed the small size NC punching system which has an aligning kinematics between the rectangular shaped punch and die. The punch is driven by an ai cylinder and the sheet metal is moving on the X-Y table system which is driven by two stewing motors. The microprocessor control the whole system and communicate with the monitoring PC by RS232C serial communication protocol. The graphic user interface program in PC monitors nil control the punching system. The cross shaped joint hinge supports the punching die and positioned by two differential screws, whose are installed in perpendicular directions. The aligning between the punch and die is performed using the sheets of half thickness(0.1mm Brass) of the real process for the frame of the TFT-LCD. Using half thickness Brass, the burr formation is magnified and we can decide the aligning direction more easily then using the real thickness(0.2mm) Aluminum. In this paper, the aligning results are measured manually using the SEM photographs and we hope to make the automated aligning procedures using some kinds of image processing techniques.

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Design of DGNSS Software RSIM's Data Receive Module for G-III GNSS Receiver in SBAS Reference Station (SBAS 기준국용 G-III 수신기 연동을 위한 DGNSS SW RSIM의 수신 모듈 설계)

  • Jang, Wonseok;Park, Sanghyun;Seo, Kiyeol
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2016.05a
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    • pp.297-300
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    • 2016
  • The typical Differential Global Navigation Satellite System service of South Korea is the Ground Based Differential GNSS service. South Korea building the Satellite-Based Augmentation System for GNSS to expand the Differential GNSS service. The satellite-based differential GNSS serive is called the SBAS(Satellite Based Augmentation System). The SBAS reference station on ground should be installed to operate the SBAS service alike the ground based augmentation system. That SBAS reference station can be installed with ground based DGNSS reference station. To make the SBAS reference station combined with the ground based DGNSS reference station, DGNSS system should be connected to NovAtel's G-III receiver. In this paper, the DGNSS software reference station's software module architecture was changed and G-III interface module was designed to use the G-III receiver.

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A Study on the Development of the SCADA System using the Internet (인터넷을 이용한 SCADA 시스템 구축에 관한 연구)

  • Park, I.K.;Yoon, K.K.;Kim, Y.S.;Lee, S.G.;Ahn, B.W.
    • Proceedings of the KIEE Conference
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    • 1998.07g
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    • pp.2373-2376
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    • 1998
  • This paper describes the development of the SCADA(Supervisory Control and Data Acquisition) system which can be controlled via the Internet. In this paper, the SCADA system is composed of a number of microprocessor-based RTU(Remote Terminal Unit)s, a MMI(Man Machine Interface) host, a SCADA server, and SCADA clients. There are two protocols used in the system. Each RTU and the MMI host are connected by a RS-485 line and CSMA/CD(Carrier Sense Multiple Access / Collision Detection) protocol is used to communicate with each other. TCP/IP(Transmission Control Protocol/Internet Protocol) is used among the MMI host, the SCADA server, and SCADA clients. The equipments installed in the field are controlled by a number of RTUs. The function of the MMI host is to acquire real-time data from RTUs and control them. The SCADA server supports data transfer between the networked MMI host and the SCADA client on the web-server through TCP/lP. Data transfer is possible regardless of the type of network only if there are TCP/lP Winsock-compatible stack driver. The SCADA client is implemented as the shape of web-page by means of JAVA language. Therefore, it runs on a web-browser such as Netscape and Explorer, and allows a number of users to access this SCADA system.

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A Study on the RSVP_Proxy for Micro Mobility (마이크로 이동성 위한 RSVP_Proxy에 관한 연구)

  • 박승균;오영환
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.28 no.9B
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    • pp.774-782
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    • 2003
  • Generally, in the Mobile IP technologies, the use of RSVP(Resource ReSerVation Protocol) is recommended in order to provide a mobile node real-time service. However, the handoff of a mobile node increases the registration delay, RSVP reservation delay and signalling overhead in the Mobile IP and RSVP interworking. Specially, the resource reservation on the path between a mobile node and a correspondent node is the duplicated reservation and then causes unnecessary creation of the signalling overhead and waste of the resource, since the majority of the path before handoff and after handoff is same. If the radius of a cell providing a wireless interface to a mobile node is small, the number of handoff will increase and also signalling overhead and duplicated resource reservation will increase. In this paper, we proposed the integration model of Cellular IP and RSVP with RSVP proxy scheme. Here, Cellular IP protocol minimizes registration delay, transfer delay, and loss by handoff in micro cell network, the RS VP proxy that minimizes the duplication of resource reservation prevents the path for RSVP session from change using the address for reservation of a mobile node. Proposed scheme was evaluated in comparison with the existing Mobile IP and RSVP interworking scheme using the probability of resource reservation fail to the radius of a cell and the handoff rate.

The Implementation of Integrated Information Network for JANG-MOK Oceanographic Research Ship (시험조사선 장목호의 종합정보통신망 구현)

  • Park Jong-Won;Kim Dug-Jin;Baek Hyuk;Park Dong-Won
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2006.05a
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    • pp.91-94
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    • 2006
  • KORDI(Korea Ocean Research & Development Institute) built a research vessel JANG-MOK with 40 G/T for a survey and observation of oceanographic environmental characteristics at coastal region in September 2005. This paper introduced the implementation for hardware and software of an integrated information network that loaded in JANG-MOK, and depicted the function of an integrated information network, such as an installation of ga-bit based network, RS232C serial & UDP network interface of instruments, a data logging software of measured data, Hawkeye II software for supporting the efficient survey works, and a real-time navigation viewer. In addition, we presents the another implementation method for an integrated information network of oceanographic research vessels.

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