Agility of wireless sensor networks for earthquake monitoring of bridges

Authors:
Liang Cheng;Shamim N. Pakzad
Affiliations:
Department of Computer Science and Engineering, Lehigh University, Bethlehem, PA;Department of Civil and Environmental Engineering, Lehigh University, Bethlehem, PA
Venue:
INSS'09 Proceedings of the 6th international conference on Networked sensing systems
Year:
2009

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Abstract

Applying wireless sensor networks (WSNs) for bridge monitoring has received considerable interests over the past few years. In this paper two WSN-agility problems are identified based on the deployment experiences of WSNs in earthquake monitoring of bridges: (i) timely capturing the earthquake response of bridges and (ii) quasi-realtime processing of the measured data for bridge modal identification in monitoring the features of the structure. This paper also presents solutions for these problems: a pulse-based media access control scheme for the first problem and a distributed approach to modal identification by spectral methods for the second problem to address the combined agility issues. Results show the effectiveness of the proposed approaches.