• 제목/요약/키워드: vibration detection

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Detection of Excited Vibration frequency on the Latticed Fence Structure Using a Distributed Fiber Optic Sensor (격자형 구조물의 외부 진동 주파수 탐지를 위한 분포형 광섬유 센서 설계 및 실험)

  • Lee, Jong-Kil
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2002.11b
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    • pp.234-237
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    • 2002

  • To detect external vibration signals on the latticed fence structure, distributed fiber optic sensor using Sagnac interferometer was fabricated and tested. The latticed structure fabricated with dimension of 170cm in width and 180cm in height, the optical fiber, 50m in length, distributed and fixed on the latticed structure. It was verified the sensitivity of the Sagnac interferometer using the PZT phase modulator. Fiber optic external vibration signal spplied to the latticed fence structure from 100Hz to several kHz. The interferometeric fiber optic sensor detected the excited vibration signal very effectively without any signal processing. The detected optical signals were compared and analyzed to the detected acclerometer signals.

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Damage and Failure Detection of Composites Using Optical Fiber Vibration Sensor (광섬유 진동센서를 이용한 복합재료의 손상 및 파손검출)

  • Yang, Y.C.;Han, K.S.
    • Proceedings of the KSME Conference
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    • 2001.06a
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    • pp.547-552
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    • 2001

  • An intensity-based optical fiber vibration sensor is applied to detect and evaluate damages and fiber failure of composites. The optical fiber vibration sensor is constructed by placing two cleaved fiber end, one of which is cantilevered in a hollow glass tube. The movement of the cantilevered section lags behind the rest of the sensor in response to an applied vibration and the amount of light coupled between the two fibers is thereby modulated. Vibration characteristics of the optical fiber vibration sensor are investigated. Surface mounted optical fiber vibration sensor is used in tensile and indentation test. Experimental results show that the optical fiber sensor can detect damages and fiber failure of composites correctly.

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Detecting the Direction of Vibration Inspired by Prey Detection Behavior of Sand Scorpions (사막 전갈의 진동 감지 행동을 모델로 한 진원지 방향 추정 기법)

  • Jeong, Eun-Seok;Kim, Dae-Eun
    • Journal of Institute of Control, Robotics and Systems
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    • v.18 no.10
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    • pp.947-954
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    • 2012

  • Sand scorpions are nocturnal animals to mostly use tactile senses to detect their prey. It has been reported that sand scorpions have high vibration sensitivity for their prey-localizing behavior. We tested vibration experiments in the sand with microphone sensors to model the sand scorpion's behavior and a time-difference model was applied to find the direction of a vibration source. Using the information of the arrival time of the vibration signal to reach each leg position, we can find the location of the vibration source.

  • https://doi.org/10.5302/J.ICROS.2012.18.10.947 인용 PDF KSCI