Journal of Korean Association for Spatial Structures (한국공간구조학회논문집)

Korean Association for Spatial Structures (한국공간구조학회)
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Comparison Between Performance of a Sound-Triggered Measurement and an Amplitude-Triggered Measurement in Shaking Table Tests

진동대를 이용한 모바일 진동 계측 기기의 사운드 트리거 계측과 진폭 트리거 계측 성능 비교

  • Mapungwana, S.T. (Dept. of Architecture, Seoul National University of Science and Technology) ;
  • Lee, Jong-Ho (Dept. of Architecture, Seoul National University of Science and Technology) ;
  • Yoon, Sung-Won (School of Architecture, Seoul National University of Science and Technology)
  • Received : 2019.01.15
  • Accepted : 2019.02.13
  • Published : 2019.03.15
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Abstract

Micro-Electro-Mechanical Systems (MEMS) sensors have been widely used in Structural Health Monitoring due to their convenience and lower costs in comparison to conventional sensors. Triggered measurements are relevant in events such as earthquakes because unlike continuous measurements, they only record the structural response once an event happens. This is more cost effective and it makes the data more manageable because only the required measurements from the event are recorded. The most common method of triggering is amplitude triggering. However, lower input amplitudes (less than 0.1g) cannot be triggered by using this method. In this paper, sound triggering was introduced to allow triggered measurements for lower input amplitude values. The performance of the sound triggering and amplitude triggering were compared by a series of shaking-table tests. It was seen that sound-triggering method has a wider frequency (0.5~10Hz) and amplitude (0.01~1.0g) range of measurements. In addition, the sound triggering method performs better than the amplitude triggering method at lower amplitudes. The performance of the amplitude triggering, in terms of the triggering being simultaneous improves at higher input amplitudes.

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References

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