Determination of the probability zone for acoustic emission source location in cylindrical shell structures

This paper presents a probabilistic framework for acoustic emission (AE) source localization in cylindrical structures. Specifically, an approach based on unscented transformation (UT) is proposed to take into account uncertainty in time of flight measurements and wave velocity and eventually estimate AE source locations together with quantitative measures of confidence associated with those estimates. Experiments are carried out on a steel pipe instrumented with an array of six embedded piezoelectric disks. Results are compared with Monte Carlo simulations by the Kullback–Leibler divergence.

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