Yuichiro Yamabe

Fundamental Tests on a Structural Health Monitoring System for Building Structures Using a Single-board Microcontroller

Abstrct Aiming at the extension of structural health monitoring systems, a new monitoring system with low cost and easy installation was developed in this study. The proposed system includes MEMS acceleration sensors for measuring, a single-board microcontroller GR-SAKURA for processing, and a wireless device, XBee-PRO, for communicating. Acceleration data are collected by microcontroller and transferred by wired or wireless devices to a PC for real-time monitoring. To verify the measuring performance of the proposed system, fundamental shaking table tests were conducted on a small-scale three-story specimen. Data collection and measuring accuracy were verified. The system′s applicability to structural health monitoring systems was assessed. Experimental results showed that the response accelerations and natural frequencies of the specimen measured using the proposed system coincided well with those measured using a conventional data logger. GR-SAKURA has sufficient processing capability. XBee-PRO was confirmed to satisfy basic communication requirements equal to a wired system. Therefore, the proposed system is applicable for structural health monitoring systems with high cost-performance and simple construction.

Fundamental Test of Seismic Information and Building Damage Data Gathering System using OSHW with Wireless Sensor Network

To cope with a large disaster such as that caused by a large earthquake, it is necessary to gather seismic information and building damage data. This paper describes open source hardware (OSHW) with various sensors and a wireless communication system used as a new device to measure the strength of an earthquake and the extent of building damage. The OSHW assessed in this study is inexpensive and readily accessible. Therefore, the spread of wireless sensor network with the OSHW is expected. For this study, an acceleration sensor is used to conduct the following examinations. First, a component of OSHW with the wireless sensor network is explained, as are its specifications. Secondly, simple and extensive applications for the system for gathering seismic information and building damage data are proposed. Thirdly, future subjects of these applications are defined. Several fundamental test results are presented. Finally, the effectiveness of this seismic information gathering system is discussed.