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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 743673, 9 pages
http://dx.doi.org/10.1155/2012/743673
Research Article

Design of a Wireless Multi-Radio-Frequency Channels Inspection System for Bridges

1School of Electronic Science and Technology, Dalian University of Technology, Dalian 116024, China
2Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China
3School of Civil Engineering and Architecture, Heilongjiang University, Harbin 150080, China
4Offshore Oil Engineering Co. Ltd., Tianjin 300451, China

Received 21 June 2012; Revised 10 September 2012; Accepted 24 October 2012

Academic Editor: Gangbing Song

Copyright © 2012 Yan Yu 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

This paper presents a wireless multi-radio-frequency channels inspection system (WMCIS) based on wireless sensor networks (WSN) for the sake of bridge structural vibration inspection. The designed system consists of a wireless controller and eight wireless nodes with acceleration sensing units. The whole system has 64 collection channels, so every wireless node has eight 24-bit A/D channels. Integrated with acceleration sensing units, an embedded low-power microprocessing unit, a wireless transceiver unit, a large-capacity power unit, and a GPS time synchronization unit, the wireless node has the functions such as data collection, initial analysis, data storage, and wireless data transmission. The wireless controller, equipped with a high-performance computation unit, a wireless transceiver unit, a mobile power source, and an embedded data analysis software, can totally control multiple wireless nodes and receive and analyze data for parameter identification. To verify the performance of the WMCIS, experiments are made on the Caihong Bridge and Jinzhou Bridge in China for inspecting the bridge structural vibration. Experimental results show that the system has the advantages such as fast arrangement, high sampling rate, high resolution, capacity of low-frequency inspection, and GPS clock project for time synchronization and, thus, has good application prospects and practical value.