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Published in:
2022 | OriginalPaper | Chapter
Multipoint Measurement of Microtremor and Seismic Motion of Slope Using Small Accelerometers
Authors : Lin Wang, Takemine Yamada, Kentaro Kasamatsu, Kazuyoshi Hashimoto, Shangning Tao
Publisher: Springer International Publishing
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Abstract
The authors have developed a real-time monitoring system. The monitoring sensors are in small size, power-saving, low-cost. The sensor unit is embedded with a 1D micro seism accelerometer and 3D MEMS (Micro Electro Mechanical Systems) accelerometer (seismic motion/vibration) and has been verifying its field performance since 2019. In the microtremor measurement, compared the result of acceleration Fourier amplitude spectrum with speed Fourier amplitude spectrum of conventional microtremor speed sensor at the same site, almost the same results of the predominant period were obtained. The measured results of the Mj 6.9 earthquake in Miyagi prefecture (March 20, 2021) will also be introduced as a case study. The developed microseism sensor units were applied to the field test of slope over two years, the result is that it can withstand long-term measurement with an accuracy comparable to a conventional seismometer.