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Structural Health Monitoring In Historical Buildings Using A Low Cost Wireless Sensor Network

Structural Health Monitoring (SHM) in historical buildings is achieved by sensing the structure’s ambient vibrations. Technological advances in Wireless Sensor Networks (WSN) provide potential for non-intrusive monitoring approaches. A common challenge among WSN applications is the synchronization of the participating sensors, in order to collect reliable information. The current work proposes a broadcast-based lightweight synchronization process which is tested for its effectiveness in a small scale multi-hop ad-hoc network under lab conditions. The two experiments conducted in the context of this study, show that the performance of the synchronization initially places timers within a range of zero to three milliseconds and explore the effect of sensors’ clock drifts and the resulted accumulation of synchronization deviation over time.