Evaluation of Low-cost MEMS Acceleration Sensors to Detect Earthquakes (지진 감지를 위한 저가형 MEMS 가속도 센서의 평가)

Jangsoo Lee (이장수); Kwon Young Woo (권영우)

doi:10.9708/jksci.2020.25.05.073

Evaluation of Low-cost MEMS Acceleration Sensors to Detect Earthquakes

Journal of The Korea Society of Computer and Information
Abbr : JKSCI
2020, 25(5), pp.73-79
DOI : 10.9708/jksci.2020.25.05.073
Publisher : The Korean Society Of Computer And Information
Research Area : Engineering > Computer Science
Received : April 14, 2020
Accepted : May 20, 2020
Published : May 29, 2020

Jangsoo Lee ¹, Kwon Young Woo ¹

¹경북대학교

Accredited

ABSTRACT

As the number of earthquakes gradually increases on the Korean Peninsula, much research has been actively conducted to detect earthquakes quickly and accurately. Because traditional seismic stations are expensive to install and operate, recent research is currently being conducted to detect earthquakes using low-cost MEMS sensors. In this article, we evaluate how a low-cost MEMS acceleration sensor installed in a smartphone can be used to detect earthquakes. To this end, we installed about 280 smartphones at various locations in Korea to collect acceleration data and then assessed the installed sensors’ noise floor through PSD calculation. The noise floor computed from PSD determines the magnitude of the earthquake that the installed MEMS acceleration sensors can detect. For the last few months of real operation, we collected acceleration data from 200 smartphones among 280 installed smartphones and then computed their PSDs. Based on our experiments, the MEMS acceleration sensor installed in the smartphone is capable of observing and detecting earthquakes with a magnitude 3.5 or more occurring within 10km from an epic center. During the last several months of operation, the smartphone acceleration sensor recorded an earthquake of magnitude 3.5 in Miryang on December 30, 2019, and it was confirmed as an earthquake using STA/LTA which is a simple earthquake detection algorithm. The earthquake detection system using MEMS acceleration sensors is expected to be able to detect increasing earthquakes more quickly and accurately.

KEYWORDS

Earthquake, Accelerometer, Noise Floor, Power Spectrum Density, MEMS

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This paper was written with support from the National Research Foundation of Korea.

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Journal of The Korea Society of Computer and Information 2023 KCI Impact Factor : 0.65

Evaluation of Low-cost MEMS Acceleration Sensors to Detect Earthquakes

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* References for papers published after 2023 are currently being built.

Journal of The Korea Society of Computer and Information 2023 KCI Impact Factor : 0.65

Evaluation of Low-cost MEMS Acceleration Sensors to Detect Earthquakes

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