• 제목/요약/키워드: Non-contact

검색결과 2,359건 처리시간 0.046초

USN 기술 기반의 비접촉 식물 생장 측정 시스템 구현 (Implementation of Non-contact Plant Growth Measurement System based on USN Technologies)

  • 석진원;유인태
    • 한국컴퓨터정보학회논문지
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    • 제15권10호
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    • pp.137-145
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    • 2010
  • 본 논문은 USN(Ubiquitous Sensor Network) 기술 기반의 적외선 센서를 사용한 비접촉식 식물 생장 측정 시스템을 제안한다. 제안된 시스템은 식물 생장을 측정할 때 식물의 생장 피해를 줄이기 위하여 비접촉 센서를 사용하였다. 이 시스템은 직경, 단면적, 비대 형상과 같은 식물 생장 요소를 실시간 비접촉 방식으로 측정할 수 있다. 측정된 데이터는 센서 네트워크 기술을 사용하여 원격 서버까지 전송되고, 서버에서 저장 및 분석되며, 최종적으로 분석된 데이터는 사용자에게 제공될 수 있도록 구성하였다. 본 논문에서 제안된 식물 생장 측정시스템은 측정 방식과 장치에 비접촉 적외선 센서를 사용하여 설계 및 구현을 하였다. 그리고 시스템의 성능은 필드에서 측정 실험을 통하여 검증해 보았다.

Proximity에서 유도된 회전기계의 이상 진동 (Vibration of rotating machinery due to proximity)

  • 구재량;황재현;김두영;윤완노;김연환
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2003년도 춘계학술대회논문집
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    • pp.532-535
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    • 2003
  • Vibration of rotating machinery is a factor that is something to do with abnormal machinery. Former days, Perception of vibration at rotating machinery had used Shaft rider type. Shaft rider type was adhered to surface of shaft and detected vibration of rotating machinery. Recently, Perception of vibration at rotating machinery uses to non-contact sensor. Working principle of non-contact sensor is used of eddy current. Vibration at rotating machinery appears to deviation of eddy current. In this paper, We investigate abnormal vibration due to non-contact sensor.

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마그네토스트릭션 효과를 이용한 회전축의 비접촉 결함진단 (Non-Contact Damage Detection of Rotating Shafts by Using the Magnetostrictive Effect)

  • 김윤영;한순우;이호철
    • 대한기계학회논문집A
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    • 제26권8호
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    • pp.1599-1607
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    • 2002
  • The purpose of this work is to suggest a new non-contact damage detection method for rotating ferromagnetic shafts. The presence and the location of a damage in rotating shafts are assessed by means of longitudinal elastic waves propagating along the shafts. These waves are measured by non-contact magnetostrictive sensors consisting of a coil and bias magnets. This paper shows the effectiveness of the sensors in the damage detection of rotating shafts. Several issues occurring in the application of the sensors to rotating shafts are carefully investigated.

자기 변형 패치를 이용한 비자성 배관의 비접촉 종진동 모달 테스팅 (Non-contact Longitudinal Modal Testing of a Non-ferromagnetic Pipe Using Magnetostrictive Patches)

  • 박찬일;한순우;김윤영
    • 한국소음진동공학회논문집
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    • 제18권3호
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    • pp.293-298
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    • 2008
  • Non-contact modal testing for longitudinal modes of a pipe is discussed in this work. The suggested method can generate and measure longitudinal vibrations without mechanical contact by using the coupling phenomenon between deformation and magnetic field, known as the magnetostrictive effect. This effect has been used to generate and measure ultrasonic waves, but seldom used to deal with audible vibrations. In this investigation, the validity of the developed method in a typical vibration frequency range is checked with an Inconel pipe being used in nuclear power plants.

고속주축용 비접촉 시일의 형상설계 연구 (Design Characteristics of Non-Contact Type Seal for High Speed Spindle)

  • 나병철;전경진;한동철
    • 한국정밀공학회지
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    • 제14권4호
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    • pp.56-63
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    • 1997
  • Sealing of lubricant-air mixture in the high performance machining center is one of most the important characteristics to carry out enhanced lubrication. High speed spindle requires non-contact type of sealing mechanism. Evaluating an optimum seal design to minimize leakage is concerned in the aspect of flow control. Effect of geometry and leakage path are evaluated according to variation of sealing geometry. Velocity, pressure, turbulence intensity of profile is calculated to find more efficient geometry and variables. This offers a methodological way of enhancement seal design for high speed spindle. The working fluid is regarded as two phases that are mixed flow of oil phase and air phase. It is more reasonable to simulate an oil jet or oil mist type high speed spindle lubrication. Turbulence and compressible flow model are used to evaluate a flow characteristic. This paper considers a design effect of sealing capability of non- contact type seals for high speed spindle and analyzes leakage characteristics to minimize a leakage 7 on the same sealing area.

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로봇시뮬레이터를 이용한 3 차원 스캐너의 측정 자동화 (Automation measurement of a 3D scanner using a robot simulator)

  • 유희욱;장평수;장민호
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2004년도 추계학술대회 논문집
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    • pp.836-839
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    • 2004
  • Qualitative elevation of products is very important Part. A business racking us brains to find for qualitative elevation of products. Recently, measurement accuracy of a non-contact 3D scanner has been rapidly improving. As a result, the number application cases of non-contact 3D scanners are increasing. A non-contact 3D scanner is capable of measuring a curved surface rapidly and has high resolution. It is more affordable and potable than the CMMs, It is therefore expected to be applied more frequently in more diverse industries. Automating the measuring process using a non-contact 3D scanner and developing a technology, which allows a user to measure easily, will eventually improve the quality of products. As their inspection and analysis processes improve.

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비접촉 SPL기법을 이용한 단결정 실리콘 웨이퍼 표면의 극초단파 펄스 전기화학 초정밀 나노가공 (Nanomachining on Single Crystal Silicon Wafer by Ultra Short Pulse Electrochemical Oxidation based on Non-contact Scanning Probe Lithography)

  • 이정민;김선호;김택현;박정우
    • 한국생산제조학회지
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    • 제20권4호
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    • pp.395-400
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    • 2011
  • Scanning Probe Lithography is a method to localized oxidation on single crystal silicon wafer surface. This study demonstrates nanometer scale non contact lithography process on (100) silicon (p-type) wafer surface using AFM(Atomic force microscope) apparatuses and pulse controlling methods. AFM-based experimental apparatuses are connected the DC pulse generator that supplies ultra short pulses between conductive tip and single crystal silicon wafer surface maintaining constant humidity during processes. Then ultra short pulse durations are controlled according to various experimental conditions. Non contact lithography of using ultra short pulse induces electrochemical reaction between micro-scale tip and silicon wafer surface. Various growths of oxides can be created by ultra short pulse non contact lithography modification according to various pulse durations and applied constant humidity environment.

A Novel Non-contact Heart Rate Estimation Algorithm and System with User Identification

  • Kim, Chan-Il;Kim, Hyung-Jin;Kim, Seon-Chil;Park, Hee-Jun;Lee, Jong-ha
    • IEIE Transactions on Smart Processing and Computing
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    • 제5권6호
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    • pp.395-402
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    • 2016
  • In these days, the wearable devices have been developed for measuring biological data effectively. However, wearable devices have tissue allege and noise problem. Also, it is impossible for a remote center to identify the person whose data are measured by wearable devices, which could trigger a communication problem over treatment. To solve these problems, biometric measurement based on a non-contact method, such as face image sequencing is necessary. This makes it possible to measure biometric data without any operation and side effects. This system can monitor the biological signals of people in real time without allege and noise and simultaneously identify them. In this paper, we propose an authentication process while measuring biometric data, through a non-contact method.

무접점 베터리 충전 장치용 Half-Bridge 직렬 공진 컨버터 분석 및 설계 (Analysis and Design of Half-Bridge Series Resonant Converter for Non-Contact Battery Charger)

  • 김창균;유정식;박종후;조보형;서동현
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 하계학술대회 논문집 F
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    • pp.2508-2511
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    • 1999
  • A non-contact battery charger which transfers energy using magnetic field without any electrical contacts is designed using half-bridge series resonant converter. This converter utilizes series resonance to reduce the undesirable effect of large leakage inductance of the non-contact transformer and ZVS operation can reduce switching losses. In this paper. analysis and design procedure of half-bridge series resonant converter with non-contact transformer is presented. Input voltage is 85VAC ${\sim}$ 270VAC, output voltage and current is 4.1V and 800mA, respectively. Furthermore, a method for calculating the secondary current of the transformer to control battery charging current in constant current charging mode which is required for litium-ion battery is proposed and the performance is verified from experiments.

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High aspect ratio 팁의 비접촉모드에서의 측정 (Non-contact mode measurement of high aspect ratio tip)

  • 신영현;한창수
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2006년도 춘계학술대회 논문집
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    • pp.463-464
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    • 2006
  • This paper present experimental results by non-contact mode Atomic Force Microscopy using high aspect ratio tips (HAR-T). We fabricated the carbon nanotube tip based on dielectrophoresis and the carbon nano probe by focused ion beam after dielectrophoretic assembling. In this paper, we measure AAO sample and trench structure to estimate HAR-T's performance and compared with conventional Si tip. We confirmed that results of HAR-T's performance in non contact mode was very superior than conventional tip.

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