Wireless Acoustic Emission Sensor Network for Structural Monitoring

TitleWireless Acoustic Emission Sensor Network for Structural Monitoring
Publication TypeJournal Article
Year of Publication2009
AuthorsLedeczi, A., T. Hay, P. Volgyesi, R. Hay, A. Nadas, and S. Jayaraman
JournalIEEE Sensors Journal

The paper presents a prototype wireless system for the detection of active fatigue cracks in aging railways bridges in real-time. The system is based on a small low-cost sensor node, called an AEPod, that has four acoustic emission (AE) channels and a strain channel for sensing, as well as the capability to communicate in a wireless fashion with other nodes and a base station. AEPods are placed at fracture-critical bridge locations. The strain sensor detects oncoming traffic and triggers the AEPod out of its hibernation mode. As the train stresses the fracture-critical member, acoustic emission and strain data are acquired. The data are compressed and filtered at the AEPod and transmitted off the bridge using cell-phone communication.