• Title/Summary/Keyword: RF Module

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The Obstacle Avoidance and Position Acuracy Control Algorithm for Self Controlled Mobile Robot Using Image Information And Compass Module (영상정보와 방위각 센서를 이용한 장애물 회피와 위치 정밀제어에 대한 알고리즘)

  • 구본민;최중경;박무열;류한성;권정혁;신영호
    • Proceedings of the IEEK Conference
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    • 2002.06e
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    • pp.177-180
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    • 2002
  • In this paper, we has been studied self controlled mobile robot system with CCD camera. This system consists of TMS320F240 digital signal processor, step motor, RF module and CCD camera. 2-axis compass and magnetic sensor, we used wireless RF module for movable command transmiting between robot and host PC. This robot go straight until 95 percent filled screen with white color both side from input image. And the robot recognizes obstacle about 95 percent filled something, so it could turn for avoid the obstacle and conclude new path plan. it could get turning angle from 2-axis compass and magnetic sensor.

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Remote Measurement System with PCS and One Chip Microcontroller (PCS와 원칩 마이크로콘트롤러를 이용한 원격 검침 시스템)

  • 이지홍;하인수;김인식
    • Proceedings of the IEEK Conference
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    • 2000.06e
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    • pp.171-174
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    • 2000
  • In stead of RF module which has been used conventionally in many remote measurement applications, a new type of remote measurement system based on PCS(Personal communication system) and one chip Microcontroller is proposed in this work. PCS has many advantages with respect to cost reliability, communication quality, and so on. The proposed system consists of three different modules: PCS module, micro-controller module, and sensor module. System configuration as well as illustrative experiments will be described in detail.

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Analysis of the Frequency Properties of Range Measurement System using 900Mhz Band RF (900Mhz 대역 RF를 이용한 거리측정 시스템의 주파수특성 분석)

  • Kim Tae-Soo;Oh Inn-Yeal;Chun Joong-Chang
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2006.05a
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    • pp.997-1000
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    • 2006
  • In this paper, we have used the 900Mha RF band and produced the transmitter-receivers to measure the distance of moving range of a crane. We selected the analog signal of 450Khz middle frequency band of the RF Baseset module, and the property data of phase response is analysed to estimate the range distance. We have earned the good results from the experiment.

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RINGS AND MODULES WHICH ARE STABLE UNDER NILPOTENTS OF THEIR INJECTIVE HULLS

  • Nguyen Thi Thu Ha
    • Bulletin of the Korean Mathematical Society
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    • v.60 no.2
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    • pp.339-348
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    • 2023
  • It is shown that every nilpotent-invariant module can be decomposed into a direct sum of a quasi-injective module and a square-free module that are relatively injective and orthogonal. This paper is also concerned with rings satisfying every cyclic right R-module is nilpotent-invariant. We prove that R ≅ R1 × R2, where R1, R2 are rings which satisfy R1 is a semi-simple Artinian ring and R2 is square-free as a right R2-module and all idempotents of R2 is central. The paper concludes with a structure theorem for cyclic nilpotent-invariant right R-modules. Such a module is shown to have isomorphic simple modules eR and fR, where e, f are orthogonal primitive idempotents such that eRf ≠ 0.

Single hop Wireless Sensor Network for Low Power Configuration (Single hop Wireless Sensor Network의 저전력 구성)

  • Kim, Min-Chul;Lee, Chang-Won;Park, Chong-Ryol;Jung, Kyung-Kwon;Eom, Ki-Hwan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2011.05a
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    • pp.731-734
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    • 2011
  • This paper proposed the Low power configuration of Single hop WSN(Wireless Sensor Network) system. When the RF communication is done each tag node during the WSN systems operating, power consumption is greatest. There for, if you configure the Network with the RF communication module turn on/off periodically, power consumption less then operating the module all the time without it toggles. However, some data omissions may occur in which transmission and receipt is done. So this paper proposed the algorithm for low power system without data omissions.

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Development of Real Time Radiation Dosimeter Using RF Communication Function (RF 방식의 실시간 선량계 구현)

  • Lee, Heung-Ho;Lee, Seung-Min
    • 대한공업교육학회지
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    • v.33 no.2
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    • pp.325-339
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    • 2008
  • In this paper, we developed a module that can execute the data acquisition of the real-time measured radiant rays in the specific part of the nuclear power station. This module that includes the RF communication function, paces around the power station, being loaded on robot and can obtain the generated radiant rays in the various places through the detecting devices. It is considered that this new developed radiant rays acquisition method will have the higher degree of efficiency as compared with the existing method and reduce the expenses of the maintenance and repair work.

An Optimal Driving Support Strategy(ODSS) for Autonomous Vehicles based on an Genetic Algorithm

  • Son, SuRak;Jeong, YiNa;Lee, ByungKwan
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.13 no.12
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    • pp.5842-5861
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    • 2019
  • A current autonomous vehicle determines its driving strategy by considering only external factors (Pedestrians, road conditions, etc.) without considering the interior condition of the vehicle. To solve the problem, this paper proposes "An Optimal Driving Support Strategy(ODSS) based on an Genetic Algorithm for Autonomous Vehicles" which determines the optimal strategy of an autonomous vehicle by analyzing not only the external factors, but also the internal factors of the vehicle(consumable conditions, RPM levels etc.). The proposed ODSS consists of 4 modules. The first module is a Data Communication Module (DCM) which converts CAN, FlexRay, and HSCAN messages of vehicles into WAVE messages and sends the converted messages to the Cloud and receives the analyzed result from the Cloud using V2X. The second module is a Data Management Module (DMM) that classifies the converted WAVE messages and stores the classified messages in a road state table, a sensor message table, and a vehicle state table. The third module is a Data Analysis Module (DAM) which learns a genetic algorithm using sensor data from vehicles stored in the cloud and determines the optimal driving strategy of an autonomous vehicle. The fourth module is a Data Visualization Module (DVM) which displays the optimal driving strategy and the current driving conditions on a vehicle monitor. This paper compared the DCM with existing vehicle gateways and the DAM with the MLP and RF neural network models to validate the ODSS. In the experiment, the DCM improved a loss rate approximately by 5%, compared with existing vehicle gateways. In addition, because the DAM improved computation time by 40% and 20% separately, compared with the MLP and RF, it determined RPM, speed, steering angle and lane changes faster than them.

Implementation of a Relay Module for Coverage Extension in Visible Light Communication (가시광 통신의 커버리지 확장을 위한 릴레이 모듈 구현)

  • Lee, Sang-Gwon;Lee, Jong-Sung;Oh, Chang-Heon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2017.05a
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    • pp.738-740
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    • 2017
  • Visible light communication is a communication method using light, and it has advantage of ensuring security in a single space as compared with RF communication. However, in the area outside the visible line of the light, communication disconnection occurs. Therefore, this paper proposes a relay module to overcome the coverage extension and communication disconnection phenomenon of visible light communication. The proposed relay module transmits and receives data of visible light communication by sequentially transmitting data packets including target ID through adjacent visible light module. Through experimentation of data transmission, we confirmed the extension of the transmission range and the data reception in the area outside the line of sight.

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Inter-Module Interworking Evaluation of TDMA-Based Wireless IP Video Transmission System (TDMA 기반 무선 IP 영상 전송 시스템의 모듈간 연동 평가)

  • Sang-Ok Yoon;Myoung-Soo Kim;Gyeong-Hyu Seok
    • The Journal of the Korea institute of electronic communication sciences
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    • v.18 no.1
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    • pp.1-10
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    • 2023
  • In this paper, the design and implementation of the long-distance wireless transmission technology of high-definition video using domestic wireless communication technology for the existing wired-based CCTV surveillance system and IP camera system was evaluated for performance. The interworking test between the wireless multi-IP camera transmission terminal device and the wireless communication RF module, and the wireless multi-IP camera-based video transmission system integration interworking test confirm the module interworking suitability during video transmission.

Implementation of Bio-information Sensing System using RF Communication (RF 통신을 이용한 동물 생체정보 센싱 시스템 개발)

  • Seo, Yong-Bae;Chung, Joong-Soo
    • Proceedings of the Korea Contents Association Conference
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    • 2009.05a
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    • pp.1180-1185
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    • 2009
  • Database is constructed according to the development of information contents technology. But the construction of database using bio-information has not been developed. because it is difficult to collect bio-information. This paper presents how to construct database about sensing temperature and tilt of cow based on bio-information using RF communication. The system consists of 8bit micro-controller, tilt sensor, temperature sensor and RF module.

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