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Health Monitoring of Civil Infrastructures Using Wireless Sensor Networks

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7 Author(s)
Sukun Kim ; Electrical Engineering and Computer Sciences and University of California at Berkeley, Berkeley, CA 94720, ; Shamim Pakzad ; David Culler ; James Demmel
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A Wireless Sensor Network (WSN) for Structural Health Monitoring (SHM) is designed, implemented, deployed and tested on the 4200 ft long main span and the south tower of the Golden Gate Bridge (GGB). Ambient structural vibrations are reliably measured at a low cost and without interfering with the operation of the bridge. Requirements that SHM imposes on WSN are identified and new solutions to meet these requirements are proposed and implemented. In the GGB deployment, 64 nodes are distributed over the main span and the tower, collecting ambient vibrations synchronously at 1 kHz rate, with less than 10 mus jitter, and with an accuracy of 30 muG. The sampled data is collected reliably over a 46-hop network, with a bandwidth of 441 B/s at the 46th hop. The collected data agrees with theoretical models and previous studies of the bridge. The deployment is the largest WSN for SHM.

Published in:

2007 6th International Symposium on Information Processing in Sensor Networks

Date of Conference:

25-27 April 2007