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Wireless Acoustic Emission Sensor Network for Structural Monitoring

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6 Author(s)
Ledeczi, A. ; Inst. for Software Integrated Syst., Vanderbilt Univ., Nashville, TN, USA ; Hay, T. ; Volgyesi, P. ; Hay, D.R.
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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.

Published in:

Sensors Journal, IEEE  (Volume:9 ,  Issue: 11 )

Date of Publication:

Nov. 2009

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