Efficient GWUT Signal Processing Algorithms for Wireless NDE

Guided Wave Ultrasonic Testing (GWUT) is a modern NDT Technique which is discovering its application in Structural Health Monitoring of Civil infrastructure specifically metallic structures and also being considered for aerospace and maritime applications. It reliably detects the surface cracks in a monitored structure. It also helps enhancing failure prognosis leading to effective preventive maintenance and reduced risk of failure. Structural Health Monitoring depends greatly upon Wireless Sensor Networks (WSNs) for collection of data from widespread sensors and transmission to a base station. This paper discusses the trade-offs involved and the methods utilized for automated detection and localization of cracks at the base station. Use of low power wireless motes requires the signals received from the sensors to be partially processed before transmission to cater for low bandwidth constraints. The data gathered at the base station is then merged and processed for detection, localization and characterization.

References
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