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Sensors 2017, 17(11), 2643; https://doi.org/10.3390/s17112643

How Well Can We Extract the Permanent Displacement from Low-Cost MEMS Accelerometers?

1
Department of Earth Sciences, National Central University, Jhongli 320, Taiwan
2
Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan
3
Department of Civil Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
4
Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan
*
Author to whom correspondence should be addressed.
Received: 5 October 2017 / Revised: 14 November 2017 / Accepted: 15 November 2017 / Published: 16 November 2017
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Abstract

Following the recent establishment of a high-density seismic network equipped with low-cost micro-electro-mechanical system (MEMS) P-wave-alert-device (P-Alert) by the earthquake early warning (EEW) research group at the National Taiwan University, a large quantity of strong-motion records from moderate-magnitude earthquakes (ML > 6) around Taiwan has been accumulated. Using a data preprocessing scheme to recover the dynamic average embedded within the P-Alert data, we adopted an automatic baseline correction approach for the P-Alert accelerograms to determine the coseismic deformation (Cd). Comparisons between the Cd values determined using global positioning system (GPS) data, strong-motion records from the P-Alert network, and data from the Taiwan Strong Motion Instrumentation Program (TSMIP) demonstrates that the near-real-time determination of Cd values (>2 cm), which provide crucial information for seismic hazard mitigation, is possible using records from low-cost MEMS accelerometers. View Full-Text
Keywords: low-cost MEMS accelerometers; earthquake permanent displacement; seismic hazard mitigation; P-Alert low-cost MEMS accelerometers; earthquake permanent displacement; seismic hazard mitigation; P-Alert
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Jan, J.C.; Chao, W.-A.; Wu, Y.-M.; Chen, C.-C.; Lin, C.-H. How Well Can We Extract the Permanent Displacement from Low-Cost MEMS Accelerometers? Sensors 2017, 17, 2643.

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