How well can we extract the permanent displacement from low-cost MEMS accelerometers?

Jyh Cherng Jan, Wei-An Chao*, Yih Min Wu, Chien Chih Chen, Cheng Horng Lin

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Scopus citations

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.

Original languageEnglish
Article number2643
JournalSensors (Switzerland)
Volume17
Issue number11
DOIs
StatePublished - 16 Nov 2017

Keywords

  • Earthquake permanent displacement
  • Low-cost MEMS accelerometers
  • P-Alert
  • Seismic hazard mitigation

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