About this Journal Submit a Manuscript Table of Contents
International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 709208, 17 pages
http://dx.doi.org/10.1155/2012/709208
Research Article

Multiscale Acceleration-Dynamic Strain-Impedance Sensor System for Structural Health Monitoring

1Faculty of Civil Engineering, Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam
2Department of Ocean Engineering, Pukyong National University, Busan 608-737, Republic of Korea
3Research Center for Ocean Industrial Development, Pukyong National University, Busan 608-737, Republic of Korea

Received 21 July 2012; Accepted 17 September 2012

Academic Editor: Ting-Hua YI

Copyright © 2012 Duc-Duy Ho et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A multiscale wireless sensor system is designed for vibration- and impedance-based structural health monitoring. In order to achieve the objective, the following approaches are implemented. Firstly, smart sensor nodes for vibration and impedance monitoring are designed. In the design, Imote2 platform which has high performance microcontroller, large amount of memory, and flexible radio communication is implemented to acceleration and impedance sensor nodes. Acceleration sensor node is modified to measure PZT’s dynamic strain along with acceleration. A solar-power harvesting unit is implemented for power supply to the sensor system. Secondly, operation logics of the multi-scale sensor nodes are programmed based on the concept of the decentralized sensor network. Finally, the performance of the multi-scale sensor system is evaluated on a lab-scale beam to examine the long-term monitoring capacities under various weather conditions.