• Title/Summary/Keyword: Labview

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Safety test of rubber-tired AGT light rail vehicle (고무차륜 AGT 경량전철 차량의 고장시 안전시험)

  • Kim Y.S.;Lim T.K.;Lee J.S.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.2024-2027
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    • 2005
  • This study was aimed to prove the safety of rubber-tired AGT light rail vehicle, which was designed to have the redundant equipment for safety, so the experiment of this paper was operated in condition of malfunction which we made such as bake sequence test and momentary interruption test. The result can bes handled by Labview 7.0 and showed as the graph.

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measurement system development of MOCX performance evaluation (Micro optical cross connect의 성능평가를 위한 시스템의 개발)

  • Kim, A-Ron;Kim, Ho-Seong
    • Proceedings of the KIEE Conference
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    • 2001.11c
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    • pp.359-361
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    • 2001
  • This paper reports on the development of Micro optical cross connector(MOXC) performance evaluation system using DAQ board and Labview. The system is composed of optical part, driving circuit and software part, this evaluation system can measure insertion loss, response time and life time of MOXC, this system canbe used in mass production of MOXC.

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Identification of Spastic Joint Pathologies using Isokinetic Movement (등속운동을 이용한 경직성 관절장애 정량화)

  • Lee Chang-Han;Heo Ji-Un;Kim Chul-Seung;Eom Gwang-Moon
    • Science of Emotion and Sensibility
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    • v.7 no.4
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    • pp.19-24
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    • 2004
  • The purpose of this study is to evaluate the possibility of identifying joint damping property through commercially available isokinetic ergometer (BIODEX). The proposed method is to estimate the damping torque of the knee joint from the difference between the external joint torque for maintaining isokinetic movement and the gravity torque of the lower leg. The damping torque was estimated at various joint angular velocities, from which the damping property would be derived. Measurement setup was composed of the BIODEX system with an external force sensor and Labview system. Matlab was used in the analysis of the damping property. The experimental result showed that the small variation in angular velocity due to acceleration and deceleration of the crank arm resulted in greater change of inertial torque than the damping torque. Therefore, the estimation of damping property from the isokinetic movement is difficult.

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Study on Analytical and Empirical Methods for Assessing Geo-Heat Transfer Characteristics (지중열전달특성 평가에 관한 해석 및 실험적 방법에 관한 연구 - 지중 열물성치 및 보어 홀 열 저항 평가 -)

  • Park Jun-n;Baek Nam-Choon
    • 한국신재생에너지학회:학술대회논문집
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    • 2005.06a
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    • pp.427-432
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    • 2005
  • This study treats the advantage of in situ line source method measuring the heat transfer capacity of a borehole, using mobile equipment, to determine the thermal properties of the entire borehole system such as thermal conductivity, diffusiveity. volumetric heat capacity, and borehole thermal resistance. The results from the response test include not only the thermal properties of the ground and the borehole, but also conditions that are difficult to estimate, e,g. natural convection in the boreholes, asymmetry in the construction, etc. In this study, 1) theoretical in situ methods for assessing working fluid temperature variation in V-type PE tube have been introduced, and 2) TRTE(Thermal Response Test Equipment) has been built based on these kinds of theoretical in situ methods. Basically TRTE consists of a pump, a heater and temperature sensors for measuring the inlet and outlet temperatures of the borehole. In order to make equipment easily transportable it is set up on a small trailer. Since the response test takes above two days to execute, the test was fully automatic in recording measured data using Labview DAS(Data acquisition system) program. The test was demonstrated in the course of intensive research in this field through the one site at Ulsan city in Korea. From this kind of thermal properties test of borehole systems in situ, the design of the borehole system can be optimized regarding the total geological, hydro-geological and technical conditions at the location.

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Design of Excitation Control System of Synchronous Generator on Board Ships (선박용 동기 발전기의 여자 제어시스템 설계)

  • Lee, Youngchan;Jung, Byung-Gun
    • Journal of Advanced Marine Engineering and Technology
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    • v.39 no.3
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    • pp.298-305
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    • 2015
  • This paper provides experimental results of an excitation control system of the synchronous generator on board ships in accordance with rules of classification society to make sure its performance. The experiment compares and reviews control results between PID control and fuzzy logic control applied to change of loads of the generator in order to make sure to satisfy the rules of classification society. Both of them are written by Labview program. In case of PID Control, this paper firstly adjusts the gains by ultimate sensitive method and the gains is more tuned by engineer's experience. And the fuzzy logic controller uses Mamdani method to make membership function for error between reference voltage and measuring voltage, differential error rate and output voltage. This paper is to make sure the experimental results of the proposed excitation control system applied to actual small synchronous generator with PID control and fuzzy logic written by using Labview program and it is proved on stability and improvement through experiments.

A Study for Avoidance Alarm Algorithm with ADS-B Message (ADS-B 메시지를 이용한 충돌 경보 알고리즘에 관한 연구)

  • Ju, Yo-Han;Ku, SungKwan;Hong, Gyo-Young
    • Journal of Advanced Navigation Technology
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    • v.19 no.5
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    • pp.379-388
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    • 2015
  • In the end of 1990's, future free flight technology had been developed and tested in America and government established the plan for free flight until 2017. Aircraft separation assurance must be secured essentially to avoid collision between aircrafts before Free Flight comes true. Now, Civil aircraft has rules about avoidance activity with traffic collision avoidance system (TCAS) but it can't apply to light aircraft. So there is a need about alternative method to apply light-aircraft because it has space and price problem to use TCAS. In this paper, TCAS algorithm has been modified and verified by simulating with LABVIEW program under ADS-B condition to get miniaturization and weight lighting cheaply. By simulating, collision alert algorithm is analyzed and verified with collision situation proposed by ICAO, and 100% checked for performing the alert announciation on all cases by TCAS standards.

A pressure sensor system for detecting driver's drowsiness based on the respiration Paper Template for the KITS Review (호흡기반 운전자 졸음 감지를 위한 압력센서 시스템)

  • Kim, Jaewoo;Park, Jaehee;Lee, Jaecheon
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.12 no.2
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    • pp.45-51
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    • 2013
  • In this paper, a driver's drowsy detection sensor system based on the respiration is investigated. The sensor system consists of a piezoelectric pressure sensor attached at the abdominal region of the seat belt and a personal computer. The piezoelectric pressure sensor was utilized for the measurement of pressure variations induced by the movement of the driver abdomen during breathing. The signal processing software for detecting driver's drowsiness was produced using the Labview. The experiments were performed with 30 years male driver. The amplitude of the respiration at awake state was larger than one at the drowsy state. On the contrary, the respiration rate at awake state was lower than one at the drowsy state. The drowsy detection sensor system developed based on the experimental could successfully detect the driver's drowsy on real-time.

Fabrication and Verification of a Water Quality Sensor Equipped with Active RFID Function for Real Time Location (위치추적용 능동형 RFID 기능을 장착한 수질 측정 센서의 제작 및 검증)

  • Jung, Young-Sub;Chang, Hun;Kim, Jin-Young;Kang, Joon-Hee
    • Journal of Korean Society for Geospatial Information Science
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    • v.17 no.1
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    • pp.113-120
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    • 2009
  • Through the automatic sensing of the environment, USN technology can give the best services. In this work, we have developed an active RFID system and examined its performance. By implementing it into water quality sensors, we constructed a system that can detect diverse indoor/outdoor environment and provide information about the pollution level obtained from the temperature and PH sensors. Our RF system had an internal Print-on-PCB antenna for the miniaturization of the tag. We used a RF transceiver CC2510 chipset of TI company to realize the active RFID function. By using RSSI constants obtained, we performed the evaluation of real time location accuracy with a software written in Labview. Among 10 arbitrary locations, we obtained average measurement errors of 1.69 m in x axis and 1.66 m in y axis. This technology can be applied to logistics, environmental monitoring, prevention of missing children and various applications.

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Test-Bed Implementation for Real-Time Frequency Interference Analysis between Unlicensed Devices (비면허기기 간 실시간 주파수간섭 분석 테스트베드 구현)

  • Park, Jin-Soo;Yoon, Hyun-Goo;Jang, Byung-Jun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.26 no.6
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    • pp.589-592
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    • 2015
  • In this paper, we suggested a real-time test-bed for analyzing frequency interference between 2.4 GHz unlicensed devices, such as WiFi, Zigbee, etc. Owing to versatile programming capability of Universal Software Radio Peripheral(USRP) and $Labview^{TM}$, frequency interference environments can be easily modeled. Therefore, performance degradation effects due to various parameters of interferer and victim receiver can be analyzed intuitively. For verification, we showed a frequency interference scenario, which consists of IEEE 802.15.4 as a victim and IEEE 802.11b as a interferer. Measured Bit Error Rate(BER) results showed good agreement with theory and simulation results.