• 제목/요약/키워드: Non-contact Sensor

검색결과 294건 처리시간 0.025초

탄성파의 선택적 측정을 위한 비접촉 마그네토스트릭션 센서의 개발 및 실험적 검증 (Development and Experimentation of a Non-Contact Magnetostrictive Sensor for the Elastic Wave Mode Selection)

  • 김영규;이호철;김윤영
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2002년도 춘계학술대회논문집
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    • pp.549-553
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    • 2002
  • Although the magnetostrictive sensors have received much attention in recent years. the investigations on the selection of a desired mode have not been reported. The purpose of this investigation is to present a technique to select a desired mode in a solid ferromagnetic cylinder using a non-contact magnetostrictive sensor. To achieve this goal. we propose new bias magnet configurations to select longitudinal and flexural waves. A few experimental results confirm the validity of the present investigation.

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R2R Hall Sensor 측정 장치를 이용한 비접촉식 성능평가 (The quality evaluation of SmBCO CC by non-contact R2R Hall sensor array system)

  • 오재근;오상수;하동우;하홍수;고락길;김호섭;송규정;이남진;문승현
    • 한국초전도ㆍ저온공학회논문지
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    • 제10권3호
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    • pp.1-4
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    • 2008
  • For the effective evaluation of superconducting properties of a coated conductor, with a long length, a non destructive characterization technique including a reel-to-reel (R2R) Hall measuring system have been developed. A non-contact R2R Hall sensor array system was particularly designed to measure the superconducting property of coated conductors. The superconducting properties of long length coated conductors were measured by using this device. It was demonstrated that this system was convenient to measure the intensity and distribution of the magnet field applied perpendicular to the surfaces of the coated conductors. Using this device, the defect and low critical current density(Jc) area of coated conductors could be detected in real-time measurement.

원통 프런지 연삭공정의 감시/제어 시스템 (Monitoring/Control System for Cylindrical Plunge Grinding)

  • 김선호;정병철;안중환
    • 한국정밀공학회지
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    • 제12권9호
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    • pp.66-73
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    • 1995
  • This paper presents monitoring and control system to decrease non-production time such as air grinding and partial contact in cylindrical plunge grindings. The 4-stage model of the plunge grinding process is proposed according to the state of contact between grinding wheel and workpiece; air grinding, partial contact, entire contact and spark out. Experimentally it is seen that the AE sensor and ultrasonic sensor are very effective to detect the grinding states. Monitoring and control algorithm using recognized grinding process was introduced and a experiment were conducted to verify the developed system.

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고속회전체의 진동 측정용 비접촉 광섬유 변위센서 개발 (Development of Optical Fiber Displacement Sensor for Non-contact Vibration Measurement in the High Speed Rotation System)

  • 이기석;홍준희;신우철
    • 한국정밀공학회지
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    • 제22권8호
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    • pp.50-56
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    • 2005
  • This paper is described a development of an optical fiber displacement sensor. The optical fiber sensor using an intensity modulated measures the displacement between target and sensor. A prototype sensor is composed of a transmitting part, a receiving part and a signal processing circuit. The experiment was conducted not only the sensor performance but also factors that affect intensity. The main performance of this sensor is resolution of 0.37um and the non-linearity $0.7\%$ FS and the dynamic bandwidth of about 6.3kHz. As a result of rotation test, the prototype sensor showed an equivalent performance to a commercial eddy current sensor.

구동중인 자동차 배기계의 진동 특성 측정 (Vibration Measurement of an Automobile Exhaust System in Operation)

  • 김성국;이종남;한순우;정태진;이신영;장강원
    • 한국소음진동공학회논문집
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    • 제17권3호
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    • pp.235-240
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    • 2007
  • In this work, the operational deflection shape(ODS) of an automobile exhaust system is measured by using a recently-developed magnetic sensor. The magnetic sensor is composed of a solenoid and two pairs of permanent magnets generating an antisymmetric magnetic field in the lateral direction inside the solenoid. Lateral movement of a ferromagnetic pipe inside the magnetic field of the suggested sensor induces an electromotive force in the solenoid corresponding to the lateral velocity of the pipe. Due to the simplicity and non-contact characteristics of the magnetic sensor, dynamic behaviors of the structures operating under high temperature such as an exhaust pipe can be efficiently observed. It is shown that the lateral ODS of an exhaust system can be successfully measured by the suggested sensors.

BURR SIZE MEASUREMENT USING A CAPACITANCE SENSOR

  • Lee, Seoung-Hwan
    • 한국생산제조학회지
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    • 제8권4호
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    • pp.29-37
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    • 1999
  • This paper involves the "on-line" measurement of burrs using a capacitance sensor. A non-contact capacitance gauging sensor is attached to an ultra precision milling machine which was used as a positioning system The setup is used to measure burr profiles along machined workpiece edges. Experimental procedures and results as well as the basic theoretical principles of the capacitance sensor and specifications of related equipment are presented. The proposed scheme is shown to be accurate easy to setup and with minor modifications readily applicable to automatic deburring processes.processes.

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접촉식 센서 데이터를 이용한 지질 특성 추출 및 지질 분류 (Terrain Feature Extraction and Classification using Contact Sensor Data)

  • 박병곤;김자영;이지홍
    • 로봇학회논문지
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    • 제7권3호
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    • pp.171-181
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    • 2012
  • Outdoor mobile robots are faced with various terrain types having different characteristics. To run safely and carry out the mission, mobile robot should recognize terrain types, physical and geometric characteristics and so on. It is essential to control appropriate motion for each terrain characteristics. One way to determine the terrain types is to use non-contact sensor data such as vision and laser sensor. Another way is to use contact sensor data such as slope of body, vibration and current of motor that are reaction data from the ground to the tire. In this paper, we presented experimental results on terrain classification using contact sensor data. We made a mobile robot for collecting contact sensor data and collected data from four terrains we chose for experimental terrains. Through analysis of the collecting data, we suggested a new method of terrain feature extraction considering physical characteristics and confirmed that the proposed method can classify the four terrains that we chose for experimental terrains. We can also be confirmed that terrain feature extraction method using Fast Fourier Transform (FFT) typically used in previous studies and the proposed method have similar classification performance through back propagation learning algorithm. However, both methods differ in the amount of data including terrain feature information. So we defined an index determined by the amount of terrain feature information and classification error rate. And the index can evaluate classification efficiency. We compared the results of each method through the index. The comparison showed that our method is more efficient than the existing method.