• Title/Summary/Keyword: experiment sensor

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The Design and Performance Verification of Collocated Capacitance Sensor for Magnetic Bearing (자기베어링과 공위한 축전센서의 설계 및 성능 평가)

  • 유선중;신동원;김종원
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1994.10a
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    • pp.317-322
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    • 1994
  • The design and performance verification of collocated capacitance sensor system for magnetic bearing is presented. Noncollocation between actuators and sensors may cause unstable rotor behavior. The capacitance sensor is not affected by magnetic field. PCB type capacitance sensor is installed between magnetic bearing polse. so, collocation of sensors and actuators can be achieved. Experiment of sensor's static and dynamic charactistics is conducted. Modeling of the rotor system supported by magnetic bearing is made. And performance comparison between simulation and experiment is showed.

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Experiment of a 3D Motion Input Device (3차원 운동 입력장치 구현)

  • Lee, Woo-Won;Choi, Myoung-Hwan
    • Journal of Industrial Technology
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    • v.19
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    • pp.173-178
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    • 1999
  • In many areas of technology there are machines and systems controllable in up to six degrees of freedom. Helicopters and underwater vehicles, industrial robots are among the first representatives of this category. They need six degrees of freedom in order to move and orient within their workspace. An even broader and more explosively growing area is 3D computer graphics and virtual environment. In this work, functions of 3D input device are described and two types of commercial 3D input device are presented. Then, a preliminary experiment of a low cost 6 axis force/moment sensor is presented that can also be sued as a 3D input device. A low cost force/moment sensor and its application in robot teaching experiment is described. It computes the direction of 3 components of the force and 3 components of the moment applied by human holding the sensor by hand. The concept is shown by an experiment where the tool position and orientation of a robot in 3 dimensional space is controlled by the proposed sensor.

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Multi-sensor Visual inspection for Seamless Steel Pipe´s Straightness

  • Tomoo, Aoyama;Zhang, Y.G.
    • 제어로봇시스템학회:학술대회논문집
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    • 2001.10a
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    • pp.88.3-88
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    • 2001
  • In this paper, an on-line multi-sensor visual inspection technique for seamless steel pipe´s straightness is developed. The basic principle of the visual measuring method is detailed. The modeling of visual sensor, measurement system and data processing are presented. In order to test the accuracy of the multi-sensor visual inspection, an experiment inspecting the straightness of a 1500mm long seamless steel pipe is made. The experiment results show that the visual inspection technique can achieve on-line measurement and offers high precision and stability.

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A Study of the Non-Contact Bill Counter using Optical Fiber Sensor (광섬유 센서를 이용한 지폐 계수 장치에 관한 연구)

  • Kang, Dae-Hwa;Shin, Woo-Cheol;Song, Doo-Sang;Jang, Tak-Soon;Hong, June-Hee
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.16 no.6
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    • pp.231-236
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    • 2007
  • In this paper, we studied the possibility of non-contact bill counting method using optical fiber sensor instead of traditionally used friction counting method. To implement non-contact counting, we designed and made optical fiber sensor and related parts. optical fiber sensor is made of optical fiber of 1mm diameter, photo diode and laser diode. Based on the conclusion which derived from preliminary experiment, instrument part is designed to make unevenness on the surface of bill paper and to stay parallel with optical fiber section. By analyzing the signal of optical sensor, we made counting program. Experimental instrument is composed of sensor part, instrument part, signal handling part. We checked the possibility of non-contact counting method after implementing experiment by using optical fiber sensor and instrument part.

Fiber Fabry-Perot interferometric sensor for the measurement of current flowing into a small fuse (소형 퓨즈에 흐르는 전류 측정용 광섬유 패브리-페로 간섭형 센서)

  • Park, Sung-Sun;Park, Jae-Hee;Kim, Kyung-Chan
    • Journal of Sensor Science and Technology
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    • v.14 no.2
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    • pp.91-95
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    • 2005
  • A fiber Fabry-Perot interferometric sensor for the measurement of current flowing into a small fuse have been studied. The proposed current sensor was fabricated with a fiber Fabry-Perot interferometer attached close to a fuse line inside a small fuse. The fiber Fabry-Perot interferometer used in the experiment had the 10 mm cavity length and the 3.5 % reflectance mirrors. The phase shift of the output signal of the current sensor was proportional to the square of current applied to the fuse and the sensitivity of the current sensor was 0.87 degree/$mA^{2}$. The experiment results show that this sensor can be used for measuring current flowing into the fuse.

Assay of In Vivo Chromium with a Hollow-fiber Dialysis Sensor

  • Ly, Suw-Young;Yoo, Hai-Soo;Jung, Min-Ki;Ko, Kwang-Hee;Kim, Byung-Jin;Lee, Ki-Chul;Choi, Byung-Min
    • Toxicological Research
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    • v.26 no.3
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    • pp.233-236
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    • 2010
  • The analytical in vivo chromium ion was searched for using a voltammetric hollow-fiber dialysis sensor via square wave stripping voltammetry (SW), cyclic voltammetry (CV), and chronoamperometry. Under optimum parameters, the analytical results indicated linear working ranges of 50~400 mg/l CV and $10{\sim}80\;{\mu}g/l$ SW within a 30-sec accumulation time. The analytical detection limit (S/N) was $6.0\;{\mu}g/l$. The developed method can be applied to in vivo tissues and in ex vivo toxicity assay, as well as to other materials that require chromium analysis.

Efficiency Estimation of Ultrasonic Sensor Fabricated with Porous Piezoelectric Resonator by Experiment of 3-D Underwater Object Recotion (3차원 수중 물체인식 실험에 의한 다공질 압전 초음파 센서의 성능평가)

  • 조현철;이수호;박정학;사공건
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1997.11a
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    • pp.321-324
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    • 1997
  • In this study, Efficiency estimation of ultrasonic sensor fabricated with porous piezoelectric resonator by experiment of 3-D underwater object recognition are presented. The sensor was satisfied with requirement of ultrasonic sensor. The recognition rates for the fixed objects and the translation-rotation objects are 95.3 and 92.7[%], respectively using porous piezoelectric ultrasonic sensor and SOFM neural network. According to the experimental results, It is believed that the self-made ultrasonic sensor can be applied as underwater ultrasonic sensor.

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Precision of Autopilot System using Magnetic Compass in Small Fishing Boat (소형어선에 있어서 자기 컴퍼스를 이용한 자동항법시스템의 정도)

  • Lee, Yoo-Won
    • Journal of Fisheries and Marine Sciences Education
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    • v.19 no.3
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    • pp.510-516
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    • 2007
  • The efficiency of magnetic compass direction sensor and magnetic compass by the laboratory experiment for the apparatus of generating artificial magnetic force and the onboard experiment on the fishing boat of coastal pot at the outside of Pusan Namhang were investigated. The results showed that the bearing angle of magnetic compass direction sensor was coincided with that of magnetic compass. However, the performance of magnetic compasses was unsuitable under the ISO rule by the characteristic experiment of damping curve. Therefore, the use of autopilot system using magnetic compass direction sensor which is based on the magnetic compass needs the sufficient notice.

The Design and Experiment of a Planar Patch Sensor for Partial Discharge Diagnostics in 6.6 kV Rotating Machine Stator Windings

  • Yang, Sang-Hyun;Park, Noh-Joon;Park, Dae-Hee;Kim, Hee-Dong;Lim, Kwang-Jin
    • Transactions on Electrical and Electronic Materials
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    • v.10 no.5
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    • pp.173-176
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    • 2009
  • In the stator windings of a 6.6 kV rotating machine, internal discharges, slot discharges, and surface discharges are mainly caused by internal voids and insulation degradation. If a partial discharge(PD) occurs in an inner-part of the stator windings, it will cause electromagnetic pulses with wide frequency ranges. Discharge sparks and electromagnetic pulses generated from a discharge source, can be detected using various RF resonators like an EM sensor. In order to detect these types of electromagnetic sources, a planar patch sensor was designed and fabricated using a CST-MWS simulation, and PD signals from an artificially defected stator winding were also measured by the sensor proposed in this study. Furthermore, an HFCT was used as a reference sensor and compared with the proposed new planar patch sensor. In the results of the experiment, the planar patch sensor showed a similar performance to the HFCT sensor.

Development of Estimation Method of Sensing Ability of $2^{nd}$ Smart Sensor (2차 스마트 센서의 센싱능력 평가기법 개발)

  • 황성연;홍동표;강희용;박준홍
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.10a
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    • pp.209-213
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    • 1997
  • This paper deals with sensing ability of $2^{nd}$ smart sensor that has a sensing ability of distinguish materials. We have developed new signal processing method that have distinguish different materials. We made the $2^{nd}$ smart sensor for experiment. The second type of smart sensor is HH type. We have developed a new signal processing method that can distinguish among different materials. The estimation method (RSAIIn dex) is developed for $2^{nd}$ smart sensor(HH smart sensor). Experiment and analysis are executed for estimation the new method. We estimated sensing ability of $2^{nd}$ smart sensor with RsA, method. Sensing Ability of the $2^{nd}$ smart sensor were evaluated relatively through a new RsAl method. According to frequency changing, influences of the $2^{nd}$ smart sensor are evaluated through a new recognition index RSAI. Applications of this method are for finding abnormal conditions of objects (automanufacturing), feeling of objects (medical product), robotics, safety diagnosis of structure, etc.

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