10 April 2008 Health monitoring of plate structures using guided waves
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Abstract
Structural health monitoring using permanently attached, distributed sensors for guided waves offers an efficient monitoring methodology for large structures. The measurement concept has been demonstrated for plate structures and shown to be able to localize defects. For the application to real technical structures it needs to be shown that the methodology works equally well in the presence of structural features, which have been identified as safety-critical areas. Problems can occur due to environmental or secondary changes in the signal pathway. Different signal processing options to reduce these detrimental effects are compared, including the automatic identification of defect signals and truncation of secondary pulses. The influence of the signal processing parameters and transducer placement on the damage localization accuracy is discussed. Results are presented using experimental and simulated signals for large structures with features such as stiffeners and crack-like defects.
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P. Fromme, P. Fromme, } "Health monitoring of plate structures using guided waves", Proc. SPIE 6935, Health Monitoring of Structural and Biological Systems 2008, 69350W (10 April 2008); doi: 10.1117/12.776236; https://doi.org/10.1117/12.776236
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