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Improvement and Application of Sensor Device Capable of Autonomously Keeping Accurate Time Information for Buildings and Civil Infrastructures

Authors:
Narito Kurata

Keywords: Time Synchronization; Chip Scale Atomic Clock; Earthquake Observation; Structural Health Monitoring; Acceleration Sensor.

Abstract:
In this research, sensor devices were developed for application to seismic observation to understand damage conditions after earthquakes and to structural health monitoring for the maintenance of buildings and civil infrastructures. To apply the sensor devices, they must be densely installed in a broad area and measurement data with synchronized time must be obtained. It is desirable that the sensor devices themselves keep accurate time information even in environments with no available network or Global Positioning System (GPS) signals. Therefore, a sensor device was developed that keeps accurate time information autonomously using a Chip Scale Atomic Clock (CSAC), which consumes ultra-low power, can be mounted on a small board, and is an ultra-high precision clock. This paper explains the CSAC and a mechanism to add highly accurate time information to the measured data using the CSAC. Next, the paper discusses the process of development from prototype to practical device as well as improvement results to solve challenges identified in the actual use at a bridge. Finally, the paper demonstrates the usability of the developed sensor device using a case study where seismic observation was implemented by installing the improved devices in an actual building.

Pages: 114 to 120

Copyright: Copyright (c) IARIA, 2018

Publication date: September 16, 2018

Published in: conference

ISSN: 2308-3514

ISBN: 978-1-61208-660-6

Location: Venice, Italy

Dates: from September 16, 2018 to September 20, 2018