• Title, Summary, Keyword: wireless communication

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Design of Controller and Gripper for Wireless Communication of Gripper Contact Signal (그리퍼 접촉신호의 무선통신을 위한 제어장치 및 그리퍼 설계)

  • Kim, Hyeon Min;Kim, Chong Jin;Kim, Gab Soon
    • Journal of the Korean Society for Precision Engineering
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    • v.31 no.9
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    • pp.821-829
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    • 2014
  • This paper describes the development of a wireless communication controller of gripper contact signal for industrial robot. The wireless communication gripper controller is composed of a robot wireless communication controller and a gripper wireless transmitting/receiving controller. The robot wireless communication controller transmits the data of gripper sensors, and the gripper wireless communication controller receives the data. And the controller sends the data to the robot controller of industrial robot. As a result of the characteristics test of the wireless communication gripper controller, it is thought that the robot wireless communication controller A transmits and receives three gripper wireless transmitting/receiving controller A1, A2, A3 another. Thus, the developed wireless communication gripper controller can be used for transmitting/ receiving the data of gripper sensors for industrial robot.

A Investment on Wire-wireless Communication Method for Electrical Device Infrastructure Maintenance (전력설비 관리를 위한 무선 및 유선 통신 방법에 관한 고찰)

  • Kim, Young-Eok;Lee, Jin
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.2
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    • pp.354-359
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    • 2016
  • Power plants maintenance data is to be sent to management server system via a communication network. In this case, reliable communication network is required. Transmission of the power plants maintenance data is used in the wired communication network or wireless communication network. PLC communication network is a kind of wired communication network. However PLC communication network is easily affected by noise. On the vulnerable areas in power line system, such as a mountain or rural areas, it is difficult to form a power line communication network. For a wireless communication, environment are also influenced factors in wireless communication. Harsh environmental factors are bring the communication characteristic degradation. In such areas it can be used a combination of two networks and in this way the complementary function can be achieved. Power plants are distributed in various regions across the country. The appropriate communication network is needed to maintain the power plant.This study investigated the effect of environment on the wired communication and wireless communication. It would examine a variable factor which is affect to the communication characteristic. We used PLC communication for wired communication network and ZigBee communication for wireless communication network. We investigated the characteristics of a single communication network and it raised the need for a complex communication technology to complement a single communication network.

A multiple PLC wireless communication module using master-slave control concept (Mastey-Slave 개념을 이용한 PLC용 다대다 통신 모듈 개발)

  • 박종석;현웅근;김이곤
    • 제어로봇시스템학회:학술대회논문집
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    • pp.48-48
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    • 2000
  • We developed a wireless communication system for multiple instrumentation system. The developed system has a function of remote instrumentation and PLC(Programmable Logic Controller) control. The system consists of CC(Control and Communication) protocol, wireless media access and physical media system. For multiple wireless communication, we propose a hub polling protocol based on master-slave control concept. To show the validity of the developed system, several experiments are illustrated.

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Wireless Communication System for T/C based on DSRC (DSRC 기반의 T/C 무선통신 시스템 개발)

  • 성창우;강대성
    • Journal of Korean Port Research
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    • v.14 no.3
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    • pp.313-319
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    • 2000
  • In this paper, we proposed the model of wireless communication for ACTS using DSRC and the DSRC system for T/C. The proposed wireless communication model is how to join with DSRC and other wireless communication in port. The DSRC system for T/C is the first application to the unit of port Facilities Automation on stacking area. The DSRC system is communicated between OBE and RSE using 5.8Hz ISM band frequency. The previous works of DSRC applications are gate automation. In these cases, the road trackers are difficult to obtain information of the port in the stacking area. So we used the DSRC for the wireless communication for the port Facilities Automation. Using DSRC, the load trackers obtain more information in the port and contacts to ITS on back-roads of port. The proposed communication system is serviced to reelection of port statistics.

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2.4GHz Short range Wireless Surroundings Measurement system within In-Vehicle environment for Telematics service (텔레매틱스 서비스를 위한 차량 내 2.4GHz 대역의 근거리 무선 통신 환경 측정 시스템 구현)

  • Hur, Soojung;Lee, Seunghwan;Park, Yongwan;Shin, Jeonghun
    • IEMEK Journal of Embedded Systems and Applications
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    • v.1 no.2
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    • pp.82-89
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    • 2006
  • It appears that it is possible for us to make a wireless communication of even home-network system within car by integrating with the Ubiquitous such as mobile phone, wireless Internet, GPS and DMB in the future. If the present wireless surroundings within the car are connected with very high-speed wireless network as measurement system for wireless communication surroundings within this car in the future, it will develop the complicated communication conditions such as safe checkup, communication between systems within car, and wireless communication for user entertainment unlike universal communication conditions. Accordingly, there is the necessity of the device that can measure the interference of electric wave, communication speed and communication quality by a kind of each car. This paper aims at making the real measurement device to raise the reliability of each Application for inquiring into the interference about each other in the frequency band used under Telematics surroundings.

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Design and Implementation of Wireless Modem for Indoor Data Communication (구내 데이터 통신용 무선모뎀 설계 및 구현)

  • Cho, Byung-Hak
    • Journal of The Institute of Information and Telecommunication Facilities Engineering
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    • v.11 no.1
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    • pp.16-22
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    • 2012
  • Wireless data communication is easy to be affected by channel noise and degrade reliability and stability by the multipath fading and ISI compared with wired data communication. In this paper, we designed and implemented indoor wireless modem adopted DQPSK modulation scheme for improvement of bandwidth efficiency, and convolutional encoding, Viterbi decoding and hybrid ARQ algorithm combinig FEC with CRC for efficient error control in indoor wireless channel. Testing the implemented wireless modem, we verified the proposed scheme is proper to efficient and reliable indoor wireless data communication.

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Effects of Impulsive Noise on the Performance of Uniform Distributed Multi-hop Wireless Sensor Networks

  • Rob, Jae-Sung
    • Journal of information and communication convergence engineering
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    • v.5 no.4
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    • pp.300-304
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    • 2007
  • Wireless sensor networks represent a new and exciting communication paradigm which could have multiple applications in future wireless communication. Therefore, performance analysis of such a wireless sensor network paradigm is needed in complex wireless channel. Wireless networks could be an important means of providing ubiquitous communication in the future. In this paper, the BER performance of uniform distributed wireless sensor networks is evaluated in non-Gaussian noise channel. Using an analytical approach, the impact of Av. BER performance relating the coherent BPSK system at the end of a multi-hop route versus the spatial density of sensor nodes and impulsive noise parameters A and $\Gamma$ is evaluated.

Technological Review of Wireless Video Communication (Wireless Video Communication을 위한 영상부호화 기술)

  • 정영하;최윤식
    • Proceedings of the IEEK Conference
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    • pp.609-614
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    • 1999
  • Our present ability to work with video has not been confined to wired communication environment. This paper describes the new technological trend of wireless video communication. In wireless video communication, unlike wired network, several techniques are needed. At first, error robust video coding is essential. Due to characteristics of wireless channel, the system is exposed to more error prone environment. In addition, encoded video bit streams are vulnerable to the error because of the entropy coding. Recently many frameworks are developed to cope with this problem. We just explore the numerous robust video coding approaches with the viewing of error control. And more we discuss other on going research topics in this wireless video communication fields like low-power assumption design, trans-codec technique, and rate control schemes in brief.

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Investigation of Wireless Communication Technology for the WSN of Subway Station (도시철도 역사 WSN 구현을 위한 무선통신 기술 분석)

  • Kim, Gab-Young;Jeon, Bo-Ik;Ahn, Tae-Ki;Shin, Jeong-Ryol
    • Proceedings of the KSR Conference
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    • pp.1344-1353
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    • 2008
  • The trend is that the wireless communication system, which has specific characteristics ; low cost & limitation for installation, has been developed more actively than the wire communication system. Therefore, the communication system has been changed from the wire system with an optical cable to the wireless system in the various field of life. In the railroad field, lots of researches on the wireless communication system for the safety of infrastructure and the convenience of passenger have been conducted. The WSN(Wireless Sensor Network), which means same concept with USN(Ubiquitous Sensor Network), pursues the ubiquitous environment which means user can access network at anywhere and anytime. In this paper, the wireless communication technologies which are suitable for the WSN of subway station were investigated and the best solution of WSN was suggested.

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Application of Cooperative Transmission Scheme in Railway Wireless Communication System (철도 무선통신내에서 협력전송기법의 응용)

  • Park, Jae Jung;Kim, Yoon Hyun;Kim, Jin Young;Yang, Jae Soo
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.12 no.6
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    • pp.251-255
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    • 2012
  • In recent years, according to improvement of various vehicle instruments, railway also has been developed in various fields. As a result, to transmit accurate information to each railway system, the efficient communication system is required. In railway communication system, mitigation of wireless fading is very important. So, in this paper we introduced the cooperative relay channel model and cooperative relay scheme. Also we analyzed and simulated the cooperative relay scheme which is suitable for railway communication systems.