A Smart IoT Device for Detecting and Responding to Earthquakes
School of Computer Science and Engineering, Kyungpook National University, Daegu 41566, Korea
National Disaster Management Research Institute, Ulsan 44538, Korea
Author to whom correspondence should be addressed.
Electronics 2019, 8(12), 1546; https://doi.org/10.3390/electronics8121546
Received: 5 November 2019 / Revised: 3 December 2019 / Accepted: 9 December 2019 / Published: 15 December 2019
(This article belongs to the Special Issue IoT Services, Applications, Platform, and Protocols)
The advancement of hardware and software technologies makes it possible to use smartphones or Internet of things for monitoring environments in realtime. In recent years, much effort has been made to develop a smartphone based earthquake early warning system, where low-cost acceleration sensors inside a smartphones are used for capturing earthquake signals. However, because a smartphone comes with a powerful CPU, spacious memory, and several sensors, it is waste of such resources to use it only for detecting earthquakes. Furthermore, because a smartphone is mostly in use during the daytime, the acquired data cannot be used for detecting earthquakes due to human activities. Therefore, in this article, we introduce a stand-alone device equipped with a low-cost acceleration sensor and least computing resources to detect earthquakes. To that end, we first select an appropriate acceleration sensor by assessing the performance and accuracy of four different sensors. Then, we design and develop an earthquake alert device. To detect earthquakes, we employ a simple machine learning technique which trains an earthquake detection model with daily motions, noise data recorded in buildings, and earthquakes recorded in the past. Furthermore, we evaluate the four acceleration sensors by recording two realistic earthquakes on a shake-table. In the experiments, the results show that the developed earthquake alert device can successfully detect earthquakes and send a warning message to nearby devices, thereby enabling proactive responses to earthquakes.